阅读说明：本技术 一种基于迭代制导的运载火箭轨道参数重构方法 (Carrier rocket orbit parameter reconstruction method based on iterative guidance ) 是由 毛承元 陈尔康 邱伟 郝钏钏 匡东政 于 2021-08-23 设计创作，主要内容包括：本发明涉及一种基于迭代制导的运载火箭轨道参数重构方法,属于运载火箭制导控制领域,包括如下步骤：1采集运载火箭状态信息；2根据状态信息计算进入目标轨道的推进剂消耗量,如果推进剂消耗量小于可用量,则向原目标轨道正常飞行,如果推进剂消耗量大于可用量,则进行轨道参数重构；3在线搜索重构轨道参数,将搜索得到的重构轨道作为新的目标轨道；4控制运载火箭向新目标轨道飞行。本发明基于迭代制导,原理简洁,工程实现便捷,能够根据状态信息判断运载火箭能否进入目标轨道,并在必要时在线搜索重构轨道参数,使运载火箭具备自主轨道重构能力,在故障情况下避免或降低经济损失,提升发射任务履约能力。(The invention relates to a carrier rocket orbit parameter reconstruction method based on iterative guidance, which belongs to the field of carrier rocket guidance control and comprises the following steps: 1, collecting the state information of a carrier rocket; 2, calculating the propellant consumption entering the target track according to the state information, if the propellant consumption is less than the available amount, normally flying to the original target track, and if the propellant consumption is more than the available amount, reconstructing track parameters; 3, searching the parameters of the reconstructed orbit on line, and taking the reconstructed orbit obtained by searching as a new target orbit; and 4, controlling the carrier rocket to fly to the new target orbit. The method is based on iterative guidance, has simple principle and convenient and fast engineering realization, can judge whether the carrier rocket can enter the target orbit according to the state information, and searches the reconstructed orbit parameter on line if necessary, so that the carrier rocket has the autonomous orbit reconstruction capability, avoids or reduces economic loss under the fault condition, and improves the launching task performance capability.)

1. A carrier rocket orbit parameter reconstruction method based on iterative guidance is characterized by comprising the following steps:

step 1: acquiring initial state information of a carrier rocket, wherein the initial state information comprises: initial velocity [ V ]_x0,V_y0,V_z0]Initial position [ x ]₀,y₀,z₀]And propellant available m₀；

Step 2: calculating the propellant consumption m entering the original target track according to the initial speed and the initial position in the step 1)₁；

And step 3: judging propellant consumption m₁Whether less than the propellant usable amount m₀(ii) a If m₁≤m₀Entering step 6); if m₁>m₀Entering step 4);

and 4, step 4: the semi-major axis of the reconstructed orbit is searched online, so that the propellant consumption m of the carrier rocket entering the reconstructed orbit is reduced₃Less than or equal to the available amount m of propellant₀；

And 5: judging whether the semi-major axis of the reconstructed track is greater than or equal to the lowest semi-major axis threshold, if so, taking the reconstructed track as a new target track, and entering the step 6); otherwise, the target track is not changed, and the step 6) is carried out;

step 6: and controlling the carrier rocket to fly to the target orbit.

2. The iterative guidance-based launcher orbit parameter reconstruction method according to claim 1, wherein the lowest semi-major axis threshold of step 5) is not lower than the sum of the earth radius and 50% of the original target orbit height.

3. The iterative guidance-based reconstruction method for orbit parameters of a launch vehicle according to claim 2, wherein the online search reconstruction method for orbit semi-major axis in step 4) specifically comprises:

step 41: according to the semimajor axis of the original target trackAnd a semi-major axis search parameter h, obtaining the semi-major axis of the first target track to be determinedThereby obtaining the propellant consumption m of the carrier rocket entering the first target orbit to be determined₂；

Step 42: according to the semimajor axis of the original target trackAnd corresponding propellant consumption m₁And step 41) the second stepSemi-major axis of a target trackAnd corresponding propellant consumption m₂(ii) a Determining the semi-major axis of the second pending target trackThereby obtaining the propellant consumption m of the carrier rocket entering the second undetermined target orbit₃；

Step 43: if m₃>m₀Step 44) is entered; if m₃≤m₀If so, taking the second undetermined target track as a reconstruction track, and taking the semi-major axis of the second undetermined target track as a reconstruction track semi-major axis;

step 44: the semi-major axis of the second undetermined target trackAs the semi-major axis of the original target track, steps 41) to 43) are repeated until a reconstructed track is obtained.

4. The iterative guidance-based reconstruction method for orbit parameters of a launch vehicle according to claim 3, wherein step 41) is performed to obtain the semi-major axis of the first target orbit to be determinedThe method specifically comprises the following steps:

5. the iterative guidance-based carrier rocket orbit parameter reconstruction method according to claim 4, wherein the value range of h is 100-1000 m.

6. According to claim 5The iterative guidance-based carrier rocket orbit parameter reconstruction method is characterized in that in step 42), the semimajor axis of the second to-be-determined target orbit is determinedThe method specifically comprises the following steps:

7. a processor configured to perform the method of any one of claims 1 to 6.

8. A processing apparatus, comprising:

a memory for storing a computer program;

a processor for calling and running the computer program from the memory to perform the method of any of claims 1 to 6.

9. A computer-readable storage medium, having stored thereon a computer program or instructions, which, when executed, implement the method of any one of claims 1 to 6.

10. A computer program product, characterized in that it comprises instructions which, when run on a computer, cause the computer to carry out the method of any one of claims 1 to 6.

Technical Field

The invention relates to a carrier rocket orbit parameter reconstruction method based on iterative guidance, and belongs to the field of carrier rocket guidance control.

Background

The traditional carrier rocket has insufficient adaptability under the condition of non-fatal faults such as abnormal engine thrust descending and the like in the ascending section, and basically does not have the capabilities of fault detection isolation, flight reconstruction and the like to save tasks or reduce loss. Under the condition that a power system has a non-fatal fault, how to quickly and accurately evaluate and judge the accessibility of a preset target track according to the state information of a carrier rocket, and when the target track of a preset task is not accessible, the online track parameter reconstruction is a technical problem which needs to be solved urgently in the field, and the economic loss can be avoided or reduced.

Disclosure of Invention

In order to solve the problems, the invention provides a carrier rocket orbit parameter reconstruction method based on iterative guidance. The method has clear principle and simple and direct implementation, can evaluate whether the original target orbit can be reached on line, and can independently search to obtain a new optimal target orbit under the condition that the original target orbit cannot be reached, so that the carrier rocket has the orbit parameter reconstruction capability, the launching task can be saved, and the economic loss is avoided or reduced.

The technical scheme of the invention is as follows:

in a first aspect, a method for reconstructing orbit parameters of a carrier rocket based on iterative guidance comprises the following steps:

step 1: acquiring initial state information of a carrier rocket, wherein the initial state information comprises: initial velocity [ V ]_x0,V_y0,V_z0]Initial position [ x ]₀,y₀,z₀]And propellant available m₀；

Step 2: calculating the propellant consumption m entering the original target track according to the initial speed and the initial position in the step 1)₁；

And step 3: judging propellant consumption m₁Whether less than the propellant usable amount m₀(ii) a If m₁≤m₀Entering step 6); if m₁>m₀Entering step 4);

and 4, step 4: the semi-major axis of the reconstructed orbit is searched online, so that the propellant consumption m of the carrier rocket entering the reconstructed orbit is reduced₃Less than or equal to the available amount m of propellant₀；

And 5: judging whether the semi-major axis of the reconstructed track is greater than or equal to the lowest semi-major axis threshold, if so, taking the reconstructed track as a new target track, and entering the step 6); otherwise, the target track is not changed, and the step 6) is carried out;

step 6: and controlling the carrier rocket to fly to the target orbit.

Optionally, the lowest semimajor axis threshold of step 5) is not lower than the sum of 50% of the original target orbit height and the radius of the earth.

Optionally, the method for reconstructing the semi-major axis of the track by online search in step 4) specifically includes:

step 41: according to the semimajor axis of the original target trackAnd a semi-major axis search parameter h, obtaining the semi-major axis of the first target track to be determinedThereby obtaining the propellant consumption m of the carrier rocket entering the first target orbit to be determined₂；

Step 42: according to the semimajor axis of the original target trackAnd corresponding propellant consumption m₁And step 41) a semi-major axis of the first target track to be determinedAnd corresponding propellant consumption m₂(ii) a Determining the semi-major axis of the second pending target trackThereby obtaining the propellant consumption m of the carrier rocket entering the second undetermined target orbit₃；

Step 43: if m₃>m₀Step 44) is entered; if m₃≤m₀Then will beThe two undetermined target tracks are used as reconstruction tracks, and the semi-long shaft of the second undetermined target track is used as the semi-long shaft of the reconstruction track;

step 44: the semi-major axis of the second undetermined target trackAs the semi-major axis of the original target track, steps 41) to 43) are repeated until a reconstructed track is obtained.

Optionally, in step 41), obtaining the semi-major axis of the first target to be determined trackThe method specifically comprises the following steps:

optionally, the value range of h is 100-1000 m.

Optionally, step 42) determines the semi-major axis of the second pending target trackThe method specifically comprises the following steps:

in a second aspect, a processor is configured to perform the method of the first aspect.

A processing apparatus, comprising:

a memory for storing a computer program;

a processor for calling and running said computer program from said memory to perform the method of the first aspect.

A computer readable storage medium having stored thereon a computer program or instructions which, when executed, implement the method of the first aspect.

A computer program product comprising instructions for causing a computer to perform the method of the first aspect when the computer program product is run on a computer.

Compared with the prior art, the invention has the beneficial effects that:

the iterative guidance-based carrier rocket orbit parameter reconstruction method provided by the invention does not need complex parameter debugging and binding, is simple in design and clear in principle, can quickly and accurately evaluate and judge the accessibility of the preset target orbit under the condition that a power system has a non-fatal fault, and can reconstruct the orbit parameters on line when the target orbit of the preset task is not accessible, thereby avoiding or reducing economic loss.

Drawings

FIG. 1 is a flowchart of a method for reconstructing track parameters according to the present invention.

Detailed Description

The invention relates to a carrier rocket orbit parameter reconstruction method based on iterative guidance, the specific implementation process of which is shown in figure 1, and the method comprises the following steps:

step 1: acquiring initial state information of a carrier rocket, wherein the initial state information comprises: initial velocity [ V ]_x0,V_y0,V_z0]Initial position [ x ]₀,y₀,z₀]And propellant available m₀；

Step 2: calculating the propellant consumption m entering the original target track according to the initial speed and the initial position in the step 1)₁；

And step 3: judging propellant consumption m₁Whether less than the propellant usable amount m₀(ii) a If m₁≤m₀Entering step 6); if m₁>m₀Entering step 4);

and 4, step 4: online search reconstruction orbit semi-major axisSo that the entry of the carrier rocket into the semi-major axis isPropellant consumption m of the reconstructed track₃Less than or equal to the available amount m of propellant₀。

And 5: judgment ofWhether less than a lowest semi-major axis threshold; if it isIf the value is larger than or equal to the lowest semimajor axis threshold value, taking the reconstructed track as a new target track, and entering the step 6); if it isIf the value is smaller than the lowest semimajor axis threshold value, the target track is unchanged, and the step 6) is carried out;

the lowest semimajor axis threshold is not lower than the sum of the earth radius and 50% of the height of the original target orbit; in the examples of the present invention, it is requiredNot less than 6578140 m.

Step 6: and controlling the carrier rocket to fly to the target orbit.

Step 4) the on-line search reconstruction orbit semi-major axisThe method specifically comprises the following steps:

step 41: according to the semimajor axis of the original target trackAnd a semi-major axis search parameter h, obtaining the semi-major axis of the first target track to be determinedThereby obtaining the propellant consumption m of the carrier rocket entering the first target orbit to be determined₂；

Specifically, the method comprises the following steps:

wherein the value range of h is 100-1000 m.

Given two semi-major axes asAndaccording to the initial speed and the initial position in the step 1), calculating the propellant consumption m of the carrier rocket entering the target orbit₁And m₂。

Step 42: according to the semimajor axis of the original target trackAnd corresponding propellant consumption m₁And step 41) a semi-major axis of the first target track to be determinedAnd corresponding propellant consumption m₂(ii) a Determining the semi-major axis of the second pending target trackThereby obtaining the propellant consumption m of the carrier rocket entering the second undetermined target orbit₃；

Specifically, the method comprises the following steps:

given a semi-major axis ofAccording to the initial speed and the initial position in the step 1), calculating the propellant consumption m of the carrier rocket entering the target orbit₃。

Step 43: if m₃>m₀Step 44) is entered; if m₃≤m₀Then the second undetermined target track is taken as a reconstruction track, and the semimajor axis of the reconstruction track is

Step 44: the semi-major axis of the second undetermined target trackAs the semi-major axis of the original target track, steps 41) to 43) are repeated until a reconstructed track is obtained.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Those skilled in the art will appreciate that the details of the invention not described in detail in the specification are within the skill of those skilled in the art.