阅读说明：本技术 整车传动系统噪音评价方法、装置、设备及存储介质 (Noise evaluation method, device and equipment for whole vehicle transmission system and storage medium ) 是由 王乐 张加林 许长龙 王朋朋 曾文杰 于 2021-09-10 设计创作，主要内容包括：本发明属于汽车噪音评价技术领域,公开了一种整车传动系统噪音评价方法、装置、设备及存储介质。该方法包括：采集整车传动系统的冲击振动信号以及无冲击振动信号；根据冲击振动信号确定第一峭度评价参数以及第一峰值评价参数；根据无冲击振动信号确定第二峭度评价参数以及第二峰值评价参数；根据第一峭度评价参数、第一峰值评价参数、第二峭度评价参数以及第二峰值评价参数确定客观评价指标；根据客观评价指标评价整车传动系统的噪音。通过上述方式,采集传动系统有冲击以及无冲击时的振动信号,根据振动信号选取峰值以及峭度两种维度生成评价参数,并根据有冲击以及无冲击的评价参数生成客观评价指标,从而能够准确地评价整车传动系统的噪音。(The invention belongs to the technical field of automobile noise evaluation, and discloses a method, a device, equipment and a storage medium for evaluating the noise of a whole automobile transmission system. The method comprises the following steps: collecting an impact vibration signal and a non-impact vibration signal of a transmission system of the whole vehicle; determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal; determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal; determining an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter and the second peak evaluation parameter; and evaluating the noise of the transmission system of the whole vehicle according to the objective evaluation index. Through the mode, the vibration signals of the transmission system with or without impact are collected, two dimensions of a peak value and a kurtosis are selected according to the vibration signals to generate evaluation parameters, and objective evaluation indexes are generated according to the evaluation parameters with or without impact, so that the noise of the transmission system of the whole vehicle can be accurately evaluated.)

1. The noise evaluation method for the whole vehicle transmission system is characterized by comprising the following steps of:

collecting an impact vibration signal and a non-impact vibration signal of a transmission system of the whole vehicle;

determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal;

determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal;

determining an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter and the second peak evaluation parameter;

and evaluating the noise of the whole vehicle transmission system according to the objective evaluation index.

2. The method of claim 1, wherein determining a first kurtosis evaluation parameter and a first peak evaluation parameter from the impact vibration signal comprises:

determining a first signal value, a first signal mean value, a first sampling length and a first standard deviation according to the impact vibration signal;

determining a first kurtosis evaluation parameter as a function of the first signal value, the first signal mean, the first sample length, and the first standard deviation;

a first peak evaluation parameter is determined from the first signal value.

3. The method of claim 1, wherein determining a second kurtosis evaluation parameter and a second peak evaluation parameter from the non-shockable vibration signal comprises:

determining a second signal value, a second signal mean value, a second sampling length and a second standard deviation according to the non-impact vibration signal;

determining a second kurtosis evaluation parameter according to the second signal value, the second signal mean, the second sample length, and the second standard deviation;

a second peak evaluation parameter is determined from the second signal value.

4. The method of any of claim 1, wherein determining an objective evaluation indicator from the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter, and the second peak evaluation parameter comprises:

determining a first relative gap according to the first kurtosis evaluation parameter and the second kurtosis evaluation parameter;

determining a second relative difference according to the first peak evaluation parameter and the second peak evaluation parameter;

and determining an objective evaluation index according to the first relative gap and the second relative gap.

5. The method of claim 4, wherein determining an objective evaluation index based on the first relative distance and the second relative distance comprises:

determining a target weight ratio according to the first relative difference and the second relative difference;

and determining an objective evaluation index according to the target weight ratio, the first kurtosis evaluation parameter and the first peak evaluation.

6. The method of claim 1, wherein said step of evaluating noise of said vehicle driveline based on said objective evaluation index comprises:

acquiring subjective evaluation indexes and a preset weight ratio;

determining a comprehensive evaluation index according to the subjective evaluation index, the objective evaluation index and the preset weight ratio;

and evaluating the noise of the whole vehicle transmission system according to the comprehensive evaluation index.

7. The method of any one of claims 1 to 6, wherein the collecting of the impact vibration signal and the non-impact vibration signal of the entire vehicle driveline comprises:

acquiring a preset sampling frequency;

determining a target sampling position of the whole vehicle transmission system;

and acquiring an impact vibration signal and a non-impact vibration signal at the target sampling position according to the preset sampling frequency.

8. The utility model provides a whole car transmission system noise evaluation device which characterized in that, whole car transmission system noise evaluation device includes:

the signal acquisition module is used for acquiring an impact vibration signal and a non-impact vibration signal of a transmission system of the whole vehicle;

the first determining module is used for determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal;

the second determining module is used for determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal;

an index determining module, configured to determine an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter, and the second peak evaluation parameter;

and the index determining module is also used for evaluating the noise of the whole vehicle transmission system according to the objective evaluation index.

9. An entire vehicle driveline noise evaluation apparatus, comprising: the noise evaluation method comprises a memory, a processor and a whole vehicle transmission system noise evaluation program which is stored on the memory and can run on the processor, wherein the whole vehicle transmission system noise evaluation program is configured to realize the whole vehicle transmission system noise evaluation method according to any one of claims 1 to 7.

10. A storage medium, wherein a vehicle driveline noise evaluation program is stored on the storage medium, and when executed by a processor, the vehicle driveline noise evaluation program implements a vehicle driveline noise evaluation method as set forth in any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of automobile noise evaluation, in particular to a method, a device, equipment and a storage medium for evaluating noise of a whole automobile transmission system.

Background

The power assembly noise is taken as the main vibration and noise source of the automobile, occupies a great proportion of the automobile noise, and along with the stricter of national regulations on the noise of the whole automobile and the higher and higher requirements of automobile purchasers on riding comfort, the control on the power assembly noise is inevitable.

Most of the testing methods for the transient impact noise of the automobile power transmission system evaluate the transient impact noise by the perception of subjective driving of a driver, so that the noise of the automobile power transmission system cannot be objectively evaluated.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide a noise evaluation method, a device, equipment and a storage medium for a finished automobile transmission system, and aims to solve the technical problem of accurately evaluating the noise of the finished automobile transmission system in the prior art.

In order to achieve the aim, the invention provides a noise evaluation method of a whole vehicle transmission system, which comprises the following steps:

collecting an impact vibration signal and a non-impact vibration signal of a transmission system of the whole vehicle;

determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal;

determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal;

determining an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter and the second peak evaluation parameter;

and evaluating the noise of the whole vehicle transmission system according to the objective evaluation index.

Optionally, the determining a first kurtosis evaluation parameter and a first peak evaluation parameter from the impact vibration signal includes:

determining a first signal value, a first signal mean value, a first sampling length and a first standard deviation according to the impact vibration signal;

determining a first kurtosis evaluation parameter as a function of the first signal value, the first signal mean, the first sample length, and the first standard deviation;

a first peak evaluation parameter is determined from the first signal value.

Optionally, the determining a second kurtosis evaluation parameter and a second peak evaluation parameter from the non-impact vibration signal includes:

determining a second signal value, a second signal mean value, a second sampling length and a second standard deviation according to the non-impact vibration signal;

determining a second kurtosis evaluation parameter according to the second signal value, the second signal mean, the second sample length, and the second standard deviation;

a second peak evaluation parameter is determined from the second signal value.

Optionally, the determining an objective evaluation indicator according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter, and the second peak evaluation parameter comprises:

determining a first relative gap according to the first kurtosis evaluation parameter and the second kurtosis evaluation parameter;

determining a second relative difference according to the first peak evaluation parameter and the second peak evaluation parameter;

and determining an objective evaluation index according to the first relative gap and the second relative gap.

Optionally, the determining an objective evaluation index according to the first relative gap and the second relative gap includes:

determining a target weight ratio according to the first relative difference and the second relative difference;

and determining an objective evaluation index according to the target weight ratio, the first kurtosis evaluation parameter and the first peak evaluation.

Optionally, the step of evaluating the noise of the entire vehicle transmission system according to the objective evaluation index includes:

acquiring subjective evaluation indexes and a preset weight ratio;

determining a comprehensive evaluation index according to the subjective evaluation index, the objective evaluation index and the preset weight ratio;

and evaluating the noise of the whole vehicle transmission system according to the comprehensive evaluation index.

Optionally, gather whole car transmission system's impact vibration signal and no impact vibration signal, include:

acquiring a preset sampling frequency;

determining a target sampling position of the whole vehicle transmission system;

and acquiring an impact vibration signal and a non-impact vibration signal at the target sampling position according to the preset sampling frequency.

In addition, in order to achieve the above object, the present invention further provides a noise evaluation device for a vehicle transmission system, including:

the signal acquisition module is used for acquiring an impact vibration signal and a non-impact vibration signal of a transmission system of the whole vehicle;

the first determining module is used for determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal;

the second determining module is used for determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal;

an index determining module, configured to determine an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter, and the second peak evaluation parameter;

and the index determining module is also used for evaluating the noise of the whole vehicle transmission system according to the objective evaluation index.

In addition, in order to achieve the above object, the present invention further provides a noise evaluation device for a vehicle transmission system, including: the noise evaluation method comprises a memory, a processor and a whole vehicle transmission system noise evaluation program which is stored on the memory and can run on the processor, wherein the whole vehicle transmission system noise evaluation program is configured to realize the steps of the whole vehicle transmission system noise evaluation method.

In addition, in order to achieve the above object, the present invention further provides a storage medium, where a noise evaluation program of a vehicle transmission system is stored, and when the noise evaluation program of the vehicle transmission system is executed by a processor, the steps of the noise evaluation method of the vehicle transmission system are implemented.

The invention collects the impact vibration signal and non-impact vibration signal of the whole vehicle transmission system; determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal; determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal; determining an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter and the second peak evaluation parameter; and evaluating the noise of the transmission system of the whole vehicle according to the objective evaluation index. Through the mode, the vibration signals of the transmission system with or without impact are collected, two dimensions of a peak value and a kurtosis are selected according to the vibration signals to generate evaluation parameters, and objective evaluation indexes are generated according to the evaluation parameters with or without impact, so that the noise of the transmission system of the whole vehicle can be accurately evaluated.

Drawings

FIG. 1 is a schematic structural diagram of a noise evaluation device of a whole vehicle transmission system in a hardware operating environment according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a noise evaluation method for a whole vehicle transmission system according to a first embodiment of the invention;

FIG. 3 is an evaluation parameter difference diagram of the noise evaluation method of the entire vehicle transmission system according to an embodiment of the present invention;

FIG. 4 is a Kurtosis characteristic diagram of the noise evaluation method for the whole vehicle transmission system according to the embodiment of the invention;

FIG. 5 is a Peak feature diagram of an embodiment of the noise evaluation method for the entire vehicle transmission system of the present invention;

FIG. 6 is a schematic flow chart of a noise evaluation method for a whole vehicle transmission system according to a second embodiment of the present invention;

fig. 7 is a block diagram of the noise evaluation device of the entire vehicle transmission system according to the first embodiment of the invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a noise evaluation device of a vehicle transmission system in a hardware operating environment according to an embodiment of the present invention.

As shown in fig. 1, the noise evaluation device for a vehicle transmission system may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.

Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of the overall vehicle driveline noise evaluation apparatus, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.

As shown in fig. 1, the memory 1005, which is a storage medium, may include an operating system, a network communication module, a user interface module, and an entire vehicle driveline noise evaluation program.

In the noise evaluation device of the entire vehicle transmission system shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the noise evaluation device of the entire vehicle transmission system of the present invention may be disposed in the noise evaluation device of the entire vehicle transmission system, and the noise evaluation device of the entire vehicle transmission system calls the noise evaluation program of the entire vehicle transmission system stored in the memory 1005 through the processor 1001 and executes the noise evaluation method of the entire vehicle transmission system provided by the embodiment of the present invention.

The embodiment of the invention provides a noise evaluation method for a finished automobile transmission system, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of the noise evaluation method for the finished automobile transmission system.

In this embodiment, the noise evaluation method for the entire vehicle transmission system includes the following steps:

step S10: and collecting an impact vibration signal and a non-impact vibration signal of a transmission system of the whole vehicle.

The main execution unit of the present embodiment is a terminal device, for example, a device such as a computer having a computing function.

It can be understood that in the running process of the vehicle, namely in the running state of a transmission system of the vehicle, the operations of rapidly stepping on an accelerator, retracting the accelerator, stepping on a clutch and the like can generate transient vibration impact on the transmission system, an impact vibration signal is a signal acquired when the transmission system generates transient vibration impact, and a non-impact vibration signal is a signal acquired when the transmission system runs stably. And the impact vibration signal and the non-impact vibration signal are both time domain signals.

Further, for the purpose of acquiring a more comprehensive vibration signal, step S10 includes: acquiring a preset sampling frequency; determining a target sampling position of the whole vehicle transmission system; and acquiring an impact vibration signal and a non-impact vibration signal at the target sampling position according to the preset sampling frequency.

In the specific implementation, the whole vehicle transmission system comprises a plurality of devices, so that the signal acquisition needs to be carried out on the parts (namely target sampling positions) reflecting the noise condition of the transmission system, the parts comprise an engine, a speed changer, each point suspension, a middle-link supporting seat in a transmission shaft and a rear axle system, acceleration sensors are arranged, and all the directions of the acceleration sensors are pasted according to the direction of the whole vehicle; respectively arranging 10cm near-field microphones at an engine end, a transmission end and a rear axle end of a transmission system of the whole vehicle, and arranging main driving microphones and auxiliary driving microphones in the vehicle; and respectively arranging a rotating speed sensor on the engine crankshaft, the gearbox input shaft and the whole vehicle half shaft. Presetting sampling frequency setting: the sampling frequency of the acceleration sensor is 2000HZ, the sampling frequency of the microphone is set to be 48000HZ, and the frequency range of the rotating speed sensor is 300-35000 HZ.

Step S20: and determining a first kurtosis evaluation parameter and a first peak evaluation parameter according to the impact vibration signal.

In order to objectively evaluate noise, an impact Peak (Peak) and a Kurtosis (Kurtosis) of a vibration impact in a signal are calculated from an impact vibration signal, the impact Peak can reflect an extreme value of a characteristic signal, and the vibration impact Kurtosis can reflect an impact characteristic of the vibration signal. The impact peak value of the impact vibration signal is a first peak value evaluation parameter, and the vibration impact kurtosis is a first kurtosis evaluation parameter.

Further, in order to more accurately calculate the first kurtosis evaluation parameter and the first peak evaluation parameter, step S20 includes: determining a first signal value, a first signal mean value, a first sampling length and a first standard deviation according to the impact vibration signal; determining a first kurtosis evaluation parameter as a function of the first signal value, the first signal mean, the first sample length, and the first standard deviation; a first peak evaluation parameter is determined from the first signal value.

In a specific implementation, the first signal value is a signal value of the impact vibration signal, the first signal mean value is a signal mean value of the impact vibration signal, the first sampling length is a sampling length of the impact vibration signal, the first standard deviation is a standard deviation of the impact vibration signal, and a calculation formula of the first kurtosis evaluation parameter is as follows:

wherein x is_iThe signal value is μ, the signal mean value is μ, the sampling length is N, the standard deviation is σ, and Kurtosis is a Kurtosis evaluation parameter.

Further, the first peak evaluation parameter calculation formula is as follows:

Peak＝x_max＝max|x_iequation 2;

wherein Peak is a Peak evaluation parameter.

Step S30: and determining a second kurtosis evaluation parameter and a second peak evaluation parameter according to the non-impact vibration signal.

Further, in order to more accurately calculate the second kurtosis evaluation parameter and the second peak evaluation parameter, step S30 includes: determining a second signal value, a second signal mean value, a second sampling length and a second standard deviation according to the non-impact vibration signal; determining a second kurtosis evaluation parameter according to the second signal value, the second signal mean, the second sample length, and the second standard deviation; a second peak evaluation parameter is determined from the second signal value.

In a specific implementation, the second signal value is a signal value of the non-impact vibration signal, the second signal mean value is a signal mean value of the non-impact vibration signal, the second sampling length is a sampling length of the non-impact vibration signal, the second standard deviation is a standard deviation of the non-impact vibration signal, and the second kurtosis evaluation parameter and the second peak evaluation parameter are calculated according to the above formula 1 and formula 2. Kurtosis characteristics with and without impact calculated according to formula 1 are shown in fig. 3, and Peak characteristics with and without impact calculated according to formula 2 are shown in fig. 4.

Step S40: and determining an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter and the second peak evaluation parameter.

Further, in order to calculate the objective evaluation index more reasonably, step S40 includes: determining a first relative gap according to the first kurtosis evaluation parameter and the second kurtosis evaluation parameter; determining a second relative difference according to the first peak evaluation parameter and the second peak evaluation parameter; and determining an objective evaluation index according to the first relative gap and the second relative gap.

In a specific implementation, as shown in fig. 5, a normal vehicle is a vehicle with no transient impact on a transmission system, an impact complaint vehicle is a vehicle with a transient impact on the transmission system, Peak and Kurtosis evaluation parameters in two states of each target position of the transmission system are calculated, and a mean value of three groups of effective value data of each parameter is calculated to obtain a percentage difference, wherein a relative difference of Kurtosis is a first relative difference, and a relative difference of Peak is a second relative difference.

Further, since neither Peak nor Kurtosis evaluation alone can fully reflect the overall perception of powertrain impulsive noise, determining an objective evaluation index based on the first relative difference and the second relative difference includes: determining a target weight ratio according to the first relative difference and the second relative difference; and determining an objective evaluation index according to the target weight ratio, the first kurtosis evaluation parameter and the first peak evaluation.

It can be understood that three groups of effective values are extracted from each parameter of Kurtosts and Peak; the weight coefficient can be determined according to the difference between the normal vehicle and the complained impact vehicle corresponding to each objective evaluation index in the table III, the larger the relative difference is, the more sensitive the parameter is corresponding to the impact, the more favorable the division on the impact degree is, and the objective evaluation index calculation formula is as follows:

P＝A₁×(Kurtosis)+A₂x (Peak) formula 3;

wherein A is₁、A₂P is an objective evaluation index.

In this embodiment, the target weight ratio may be A₁＝0.6、A₂Thus, the objective evaluation index may be:

p ═ 0.6 × (Kurtosis) +0.4 × (Peak) formula 4;

step S50: and evaluating the noise of the whole vehicle transmission system according to the objective evaluation index.

In general, the lower the value of the objective evaluation index is, the lower the noise of the vehicle is, and the noise of the vehicle can be determined based on the value of the objective evaluation index.

In the embodiment, the impact vibration signal and the non-impact vibration signal of the whole vehicle transmission system are collected; determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal; determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal; determining an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter and the second peak evaluation parameter; and evaluating the noise of the transmission system of the whole vehicle according to the objective evaluation index. Through the mode, the vibration signals of the transmission system with or without impact are collected, two dimensions of a peak value and a kurtosis are selected according to the vibration signals to generate evaluation parameters, and objective evaluation indexes are generated according to the evaluation parameters with or without impact, so that the noise of the transmission system of the whole vehicle can be accurately evaluated.

Referring to fig. 6, fig. 6 is a schematic flow chart of a noise evaluation method for a vehicle transmission system according to a second embodiment of the present invention.

Based on the first embodiment, the method for evaluating noise of a transmission system of a whole vehicle according to the present embodiment further includes, in the step S50:

step S51: and acquiring subjective evaluation indexes and a preset weight ratio.

It can be understood that the subjective evaluation index refers to human subjective feeling, and since the human subjective feeling is also important when the vehicle is running, the subjective evaluation index needs to be introduced to evaluate the noise of the vehicle transmission system.

Note that in order to refer to subjective evaluation, a noise test engineer is required to evaluate the noise, and the evaluation scores are shown in table 1, wherein the scores 1, 2, 3, 4, 5, and 6 are unsatisfactory in various degrees, 7 is acceptable, medium, and normal, and 8, 9, and 10 are satisfactory in various degrees, and the evaluation is performed according to the subjective feeling of the engineer.

TABLE 1

In a specific implementation, subjective evaluation items are shown in table 2, and engineers score different evaluation items and need to score for multiple times, so that subjective evaluation indexes caused by secondary emergency are avoided.

TABLE 2

Step S52: and determining a comprehensive evaluation index according to the subjective evaluation index, the objective evaluation index and the preset weight ratio.

It should be noted that in this embodiment, the objective evaluation index can more objectively evaluate the noise of the transmission system, and the subjective evaluation index is a reference option, so that the preset weight ratio of the objective evaluation index is greater than the subjective evaluation index, thereby obtaining a comprehensive evaluation index based on the objective evaluation index.

Step S53: and evaluating the noise of the whole vehicle transmission system according to the comprehensive evaluation index.

In the embodiment, subjective evaluation indexes and preset weight ratios are obtained; determining a comprehensive evaluation index according to the subjective evaluation index, the objective evaluation index and the preset weight ratio; and evaluating the noise of the whole vehicle transmission system according to the comprehensive evaluation index. By the mode, the subjective evaluation index of a tester is combined to obtain the objective and subjective comprehensive evaluation index, so that the noise of the whole vehicle transmission system can be accurately evaluated.

In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a noise evaluation program of the transmission system of the whole vehicle, and the noise evaluation program of the transmission system of the whole vehicle is executed by a processor to realize the steps of the noise evaluation method of the transmission system of the whole vehicle.

Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.

Referring to fig. 7, fig. 7 is a block diagram of a noise evaluation device for a vehicle transmission system according to a first embodiment of the present invention.

As shown in fig. 7, the noise evaluation device for the transmission system of the whole vehicle according to the embodiment of the present invention includes:

and the signal acquisition module 10 is used for acquiring an impact vibration signal and a non-impact vibration signal of a transmission system of the whole vehicle.

A first determining module 20, configured to determine a first kurtosis evaluation parameter and a first peak evaluation parameter according to the impact vibration signal.

A second determining module 30, configured to determine a second kurtosis evaluation parameter and a second peak evaluation parameter according to the non-impact vibration signal.

An index determining module 40, configured to determine an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter, and the second peak evaluation parameter.

And the index determining module 40 is further used for evaluating the noise of the whole vehicle transmission system according to the objective evaluation index.

It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.

In the embodiment, the impact vibration signal and the non-impact vibration signal of the whole vehicle transmission system are collected; determining a first kurtosis evaluation parameter and a first peak value evaluation parameter according to the impact vibration signal; determining a second kurtosis evaluation parameter and a second peak value evaluation parameter according to the non-impact vibration signal; determining an objective evaluation index according to the first kurtosis evaluation parameter, the first peak evaluation parameter, the second kurtosis evaluation parameter and the second peak evaluation parameter; and evaluating the noise of the transmission system of the whole vehicle according to the objective evaluation index. Through the mode, the vibration signals of the transmission system with or without impact are collected, two dimensions of a peak value and a kurtosis are selected according to the vibration signals to generate evaluation parameters, and objective evaluation indexes are generated according to the evaluation parameters with or without impact, so that the noise of the transmission system of the whole vehicle can be accurately evaluated.

In an embodiment, the first determining module 20 is further configured to determine a first signal value, a first signal mean value, a first sampling length, and a first standard deviation according to the impact vibration signal; determining a first kurtosis evaluation parameter as a function of the first signal value, the first signal mean, the first sample length, and the first standard deviation; a first peak evaluation parameter is determined from the first signal value.

In an embodiment, the second determining module 30 is further configured to determine a second signal value, a second signal mean, a second sampling length, and a second standard deviation according to the non-impact vibration signal; determining a second kurtosis evaluation parameter according to the second signal value, the second signal mean, the second sample length, and the second standard deviation; a second peak evaluation parameter is determined from the second signal value.

In an embodiment, the indicator determining module 40 is further configured to determine a first relative gap according to the first kurtosis evaluation parameter and the second kurtosis evaluation parameter; determining a second relative difference according to the first peak evaluation parameter and the second peak evaluation parameter; and determining an objective evaluation index according to the first relative gap and the second relative gap.

In an embodiment, the index determining module 40 is further configured to determine a target weight ratio according to the first relative distance and the second relative distance; and determining an objective evaluation index according to the target weight ratio, the first kurtosis evaluation parameter and the first peak evaluation.

In an embodiment, the index determining module 40 is further configured to obtain a subjective evaluation index and a preset weight ratio; determining a comprehensive evaluation index according to the subjective evaluation index, the objective evaluation index and the preset weight ratio; and evaluating the noise of the whole vehicle transmission system according to the comprehensive evaluation index.

In an embodiment, the signal acquisition module 10 is further configured to acquire a preset sampling frequency; determining a target sampling position of the whole vehicle transmission system; and acquiring an impact vibration signal and a non-impact vibration signal at the target sampling position according to the preset sampling frequency.

It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.

In addition, the technical details that are not described in detail in this embodiment can be referred to the noise evaluation method of the entire vehicle transmission system provided by any embodiment of the present invention, and are not described herein again.

Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.