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Method for performance evaluation of spacecraft attitude control ground simulation system

A space vehicle and ground simulation technology, applied in the field of measurement, can solve problems such as lack of quantitative analysis support, objectivity and persuasiveness of impact assessment conclusions, and inapplicability to full physical simulation systems.

Active Publication Date: 2014-10-01
HARBIN INST OF TECH
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Problems solved by technology

However, this evaluation method relies on expert experience in the process of calculating the credibility weight coefficient. Whether it uses scoring or other quantitative means, it is essentially a qualitative evaluation and lacks effective quantitative analysis support.
In addition, it is difficult for this method to make full use of authoritative models and valid data, which affects the objectivity and persuasiveness of the evaluation conclusions
[0007] In the paper "Study on the Effectiveness of Air-floating Physical Simulation System for Space Robots" (Space Control Technology and Application, Volume 36, Issue 6, Pages 33-38), Zheng Yongjie, Zhang Duzhou and other scholars from Beijing Institute of Control Engineering discussed However, it cannot be generally applied to the effectiveness evaluation of other aircraft ground simulation systems.
[0008] Scholar Jia Jie from Northwestern Polytechnical University proposed a spacecraft semi-physical simulation The effectiveness analysis method of the system, but this method has many evaluation parameters, some parameters are difficult to determine in practical applications, and this method is only for semi-physical simulation systems, not for full-physics simulation systems

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  • Method for performance evaluation of spacecraft attitude control ground simulation system
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  • Method for performance evaluation of spacecraft attitude control ground simulation system

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Embodiment 1

[0093] combine figure 1 , the present invention is a method for evaluating the effectiveness of a space vehicle attitude control ground simulation system. Through the research on four subsystems of dynamic system, kinematics system, measurement system and control system, the credibility of the space vehicle attitude control ground simulation system is investigated. In each subsystem, multiple technical indicators are selected as similar elements, the values ​​of each similar element and the corresponding weight coefficients are calculated, and the reliability of each subsystem is obtained by weighted average. Credibility, so as to evaluate the effectiveness of the entire system.

Embodiment 2

[0095] combine figure 2 , the present invention proposes a reliability evaluation method for the dynamics subsystem of the spacecraft attitude control ground simulation system, input pulse control torque to the dynamics subsystem, record the pulse response variation curve of the angular rate, and take the rise time as similar to several sampling points The value of the similar element is obtained by comparing with the actual on-board impulse response;

[0096] According to the analytic hierarchy process, the judgment matrix P is established, and the weight coefficients of the similar elements are obtained through normalization processing, and finally the credibility of the dynamic subsystem is calculated;

[0097] According to the moment of momentum theorem, the dynamic equation of a rigid body spacecraft is expressed as:

[0098] T = H · + ω × H - - ...

Embodiment 3

[0115] combine figure 2 , the present invention proposes a method for assessing the credibility of the kinematics subsystem of a space vehicle attitude control ground simulation system, using a quaternion-based attitude kinematics equation as the kinematics subsystem. Quaternion is a mathematical expression of Euler axis / angle parameters, which has the property of linear operation and no singularity. Using quaternions to describe attitude transformation has a clear concept and flexible application, and is widely used in the algorithm design of space vehicle and ground simulation attitude determination.

[0116] Since both the actual spacecraft and the ground simulation system use attitude kinematics equations based on quaternions, the reliability of the kinematics system Q 2 =1.

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Abstract

The invention provides a method for performance evaluation of a spacecraft attitude control ground simulation system. According to the method, the credibility of a dynamic system, a kinematics system, a measurement system and a control system is studied based on the simulation system credibility theory, the overall credibility of the spacecraft attitude control ground simulation system is obtained through comprehensive calculation, and then the performance of the spacecraft attitude control ground simulation system is evaluated. According to the evaluation method, the credibility of the ground simulation system and an actual satellite attitude control system is considered from all aspects, simulation data are fully utilized, and the credibility of the ground simulation system is described objectively and quantitatively; the theoretical basis is reliable, the calculation process is simple, the application range is wide, and a new idea and reference are provided for performance evaluation study of other simulation systems.

Description

technical field [0001] The invention relates to measurement technology, in particular to a method for evaluating the effectiveness of a space vehicle attitude control ground simulation system. Background technique [0002] Once the space vehicle is launched, it will be difficult to maintain, and its special operating environment makes the ground simulation test very important. A key issue in the development of the ground simulation system is how to analyze the reliability of the ground simulation system, that is, its effectiveness evaluation problem Therefore, it is of great significance to study the performance evaluation method of the space vehicle ground simulation system for the development and analysis of the simulation system. The analysis results are directly related to the performance of the simulation system, the rationality, necessity and credibility of the indicators. [0003] Another formulation of effectiveness analysis is the credibility of the simulation syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 夏红伟刁雁华马广程王常虹刘飞王有松
Owner HARBIN INST OF TECH
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