阅读说明：本技术 一种空间光学遥感器的主动热控装置及方法 (Active thermal control device and method of space optical remote sensor ) 是由 关海南 何云丰 闫得杰 吴凡路 于 2019-09-30 设计创作，主要内容包括：本发明提供了一种空间光学遥感器的主动热控装置,包括主镜组件、次镜组件、三镜组件,主镜热控组件,所述主镜热控组件包括内环控制组件和外环控制组件；所述外环控制组件包括依次环形连接的第一控制器、第二控制器、加热片、主镜支撑结构、主镜、第一测温器；所述内环控制组件包括所述第二控制器、所述加热片、所述主镜支撑、和第二测温器,所述第二测温器一端设置在第一控制器和第二控制器之间,另一端设置在所述主镜和所述主镜支撑之间。本发明采用双闭环对光学遥感器的温度进行控制,使得控制器对光学遥感器的温度控制更加精确。进而可以保证光学遥感器的成像焦面位置变化更小,使得其成像质量更好。(The invention provides an active thermal control device of a space optical remote sensor, which comprises a primary mirror assembly, a secondary mirror assembly, a three-mirror assembly and a primary mirror thermal control assembly, wherein the primary mirror thermal control assembly comprises an inner ring control assembly and an outer ring control assembly; the outer ring control assembly comprises a first controller, a second controller, a heating plate, a main mirror supporting structure, a main mirror and a first temperature detector which are sequentially connected in a ring shape; the inner ring control assembly comprises a second controller, a heating plate, a main mirror support and a second temperature detector, wherein one end of the second temperature detector is arranged between the first controller and the second controller, and the other end of the second temperature detector is arranged between the main mirror and the main mirror support. The invention adopts the double closed loops to control the temperature of the optical remote sensor, so that the controller can more accurately control the temperature of the optical remote sensor. And then can guarantee that the change of the image focal plane position of the optical remote sensor is smaller, make its image quality better.)

1. An active thermal control device of a space optical remote sensor is characterized by comprising a primary mirror assembly, a secondary mirror assembly and a three-mirror assembly, wherein the primary mirror thermal control assembly comprises an inner ring control assembly and an outer ring control assembly; the outer ring control assembly comprises a first controller, a second controller, a heating plate, a main mirror supporting structure, a main mirror and a first temperature detector which are sequentially connected in a ring shape; the inner ring control assembly comprises a second controller, a heating plate, a main mirror support and a second temperature detector, wherein one end of the second temperature detector is arranged between the first controller and the second controller, and the other end of the second temperature detector is arranged between the main mirror and the main mirror support.

2. An active thermal control method of a space optical remote sensor, which is characterized in that the active thermal control device of the space optical remote sensor claimed in claim 1 is used, and the method comprises the following steps:

s1, inputting the target temperature to the first controller, and when there is a first thermal disturbance between the heating plate and the main mirror supporting mechanism, the second controller judges whether to control the temperature of the main mirror supporting component by receiving the data fed back by the second temperature detector, thereby realizing inner loop control;

and S2, when a second thermal disturbance exists between the main mirror supporting mechanism and the main mirror, the temperature of the main mirror is fed back to the first controller through the first temperature detector and is transmitted to the heating plate through the second controller, so that the outer ring control is realized.

3. The active thermal control method of the space optical remote sensor according to claim 2, wherein the step S1, the second controller determines whether to perform temperature control on the primary mirror support assembly by receiving data fed back by the second temperature detector, so as to implement inner loop control, specifically comprises the steps of:

s11, when the feedback temperature of the second temperature detector is higher than the target temperature, the second controller controls the heating plate not to heat;

and S12, when the feedback temperature of the second temperature detector is lower than the target temperature, the second controller heats the main mirror supporting structure through the heating plate.

4. The active thermal control method of space optical remote sensor as claimed in claim 2, wherein the step S2 is fed back to the first controller through the first temperature detector and transmitted to the heating plate through the second controller, so as to implement the outer loop control by the specific steps of:

s21, when the temperature of the first temperature detector is lower than the target temperature, the second controller heats the main mirror supporting mechanism through the heating sheet;

and S22, when the temperature of the first temperature detector is higher than the target temperature, the second controller controls the heating plate not to heat.

Technical Field

The invention relates to the field of space remote sensors, in particular to an active thermal control device and method of a space optical remote sensor.

Background

The space optical remote sensor is used as an effective load of a remote sensing satellite, and can generate large temperature difference due to the fact that the space optical remote sensor is easily affected by thermal factors such as space heat sink, solar radiation and earth infrared radiation after the space optical remote sensor enters an orbit to work. The large temperature difference influences the normal work of the electronic part of the remote sensor, and also generates thermal disturbance to influence the imaging quality of an optical system. Therefore, there is a need for an optimized design for remote sensors that implement thermal control. The current thermal control strategy mainly comprises two modes of active thermal control and passive thermal control, and the difference is that the passive thermal control has no feedback effect on a temperature control system by a controlled object in the control process, and the active thermal control can implement a temperature control and temperature measurement component on a structural part of a remote sensor and adjust the temperature according to the change of internal and external heat flows to form closed-loop control.

In the current thermal control method, passive thermal control belongs to open-loop control, and the optical remote sensor is in a required temperature range by setting target temperature of the optical remote sensor and reasonably thermally controlling the structure. The temperature monitoring device has the defects that the controller cannot realize real-time monitoring of the temperature of the key part of the remote sensor, the temperature can only be controlled within a certain range, and high-precision temperature control cannot be realized. The active thermal control uses the temperature sensor to collect and feed back the temperature of the key part of the remote sensor to the controller, the controller calculates the fed-back temperature, and sends a control signal to the heating sheet to control the temperature of the optical remote sensor to reach a stable state, so that closed-loop control is formed. Thereby enabling the device to function properly. Although such closed loop control can monitor the temperature of critical parts of the remote sensor in real time, the control accuracy of a single closed loop is not ideal.

Disclosure of Invention

The invention aims to provide an active thermal control device of a space optical remote sensor, which aims to solve the technical problem that the closed-loop control precision is not ideal in the prior art.

The second purpose of the invention is to provide an active thermal control method of a space optical remote sensor, which has more accurate temperature control, small change of the position of an imaging focal plane of the optical remote sensor and good imaging quality.

In order to solve the technical problem, on one hand, the invention provides an active thermal control device of a space optical remote sensor, which comprises a primary mirror assembly, a secondary mirror assembly, a three-mirror assembly and a primary mirror thermal control assembly, wherein the primary mirror thermal control assembly comprises an inner ring control assembly and an outer ring control assembly; the outer ring control assembly comprises a first controller, a second controller, a heating plate, a main mirror supporting structure, a main mirror and a first temperature detector which are sequentially connected in a ring shape; the inner ring control assembly comprises a second controller, a heating plate, a main mirror support and a second temperature detector, wherein one end of the second temperature detector is arranged between the first controller and the second controller, and the other end of the second temperature detector is arranged between the main mirror and the main mirror support.

In another aspect, the present invention provides an active thermal control method for a space optical remote sensor, where the active thermal control method for a space optical remote sensor includes:

s1, inputting the target temperature to the first controller, and when there is a first thermal disturbance between the heating plate and the main mirror supporting mechanism, the second controller judges whether to control the temperature of the main mirror supporting component by receiving the data fed back by the second temperature detector, thereby realizing inner loop control;

and S2, when a second thermal disturbance exists between the main mirror supporting mechanism and the main mirror, the temperature of the main mirror is fed back to the first controller through the first temperature detector and is transmitted to the heating plate through the second controller, so that the outer ring control is realized.

Further, in step S1, the second controller determines whether to perform temperature control on the primary mirror support assembly by receiving data fed back by the second temperature detector, so as to implement inner loop control, specifically including:

s11, when the feedback temperature of the second temperature detector is higher than the target temperature, the second controller controls the heating plate not to heat;

and S12, when the feedback temperature of the second temperature detector is lower than the target temperature, the second controller heats the main mirror supporting structure through the heating plate.

Further, in the step S2, the feedback to the first controller is sent through the first temperature detector, and the feedback is sent to the heating plate through the second controller, so that the specific steps of implementing the outer loop control are as follows:

s21, when the temperature of the first temperature detector is lower than the target temperature, the second controller heats the main mirror supporting mechanism through the heating sheet;

and S22, when the temperature of the first temperature detector is higher than the target temperature, the second controller controls the heating plate not to heat.

The invention has the beneficial effects that: the invention adopts double closed-loop control, and through the control strategy, the first thermal disturbance is inhibited twice, and the second thermal disturbance is inhibited once; the width of the inner ring is large, and the response is fast; the outer loop response is slow; through separately controlling first controller and second controller, control the inner ring earlier to the inner ring is adjusted, has controlled the outer ring again, and control parameter easily adjusts, and is more accurate to control accuracy, guarantees that remote sensor imaging quality is better.

Drawings

Fig. 1 is a schematic diagram of an active thermal control scheme according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to make the description of the present disclosure more complete and complete, the following description is given for illustrative purposes with respect to the embodiments and examples of the present invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The embodiments are intended to cover the features of the various embodiments as well as the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and step sequences.

Example 1:

the optical imaging system of the space optical remote sensor is analyzed, and found that the optical components influencing the focal plane position of the optical imaging system comprise a primary mirror component, a secondary mirror component and a three-mirror component, the primary mirror component has the largest influence on the focal plane position, and the three-mirror component has the smallest influence on the focal plane position. Since the primary mirror is a key component in the optical imaging system of the remote sensor, dual closed loop control should be implemented on the primary mirror assembly. Meanwhile, in order to avoid the temperature overshoot of the secondary mirror and the tertiary mirror assembly and ensure the imaging quality of the remote sensor, the temperatures of the secondary mirror and the tertiary mirror assembly are adjusted along with the temperature of the primary mirror assembly, so that the whole optical assembly reaches temperature balance.

The active thermal control device of the space optical remote sensor in the embodiment comprises a primary mirror assembly, a secondary mirror assembly and a three-mirror assembly, wherein the primary mirror thermal control assembly comprises an inner ring control assembly and an outer ring control assembly; the outer ring control assembly comprises a first controller, a second controller, a heating plate, a main mirror supporting structure, a main mirror and a first temperature detector which are sequentially connected in a ring shape; the inner ring control assembly comprises a second controller, a heating plate, a main mirror support and a second temperature detector, wherein one end of the second temperature detector is arranged between the first controller and the second controller, and the other end of the second temperature detector is arranged between the main mirror and the main mirror support.

Example 2:

an active thermal control method of a space optical remote sensor, which uses an active thermal control device of the space optical remote sensor, and the method comprises the following steps:

s1, inputting the target temperature to the first controller, and when there is a first thermal disturbance between the heating plate and the main mirror supporting mechanism, the second controller judges whether to control the temperature of the main mirror supporting component by receiving the data fed back by the second temperature detector, thereby realizing inner loop control;

and S2, when a second thermal disturbance exists between the main mirror supporting mechanism and the main mirror, the temperature of the main mirror is fed back to the first controller through the first temperature detector and is transmitted to the heating plate through the second controller, so that the outer ring control is realized.

In step S1, the second controller determines whether to perform temperature control on the primary mirror support assembly by receiving data fed back by the second temperature detector, so as to implement inner loop control, specifically including:

s11, when the feedback temperature of the second temperature detector is higher than the target temperature, the second controller controls the heating plate not to heat;

and S12, when the feedback temperature of the second temperature detector is lower than the target temperature, the second controller heats the main mirror supporting structure through the heating plate.

In the step S2, the feedback to the first controller is sent through the first temperature detector, and the feedback is sent to the heating plate through the second controller, so that the specific steps of realizing the outer loop control are as follows:

s21, when the temperature of the first temperature detector is lower than the target temperature, the second controller heats the main mirror supporting mechanism through the heating sheet;

and S22, when the temperature of the first temperature detector is higher than the target temperature, the second controller controls the heating plate not to heat.

The control priority of the inner ring and the outer ring is to perform inner ring control first and then perform outer ring control, so that the control parameters are easy to adjust, and the control precision is more accurate.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.