敏捷卫星SGCMG群姿态机动测试用例设计研究

Design and Research of Attitude Maneuver Test Case for Agile Satellite SGCMG Cluster

摘要:

针对SGCMG群敏捷姿态机动这一新技术，研究一种SGCMG群姿态机动测试用例设计方法。在分析SGCMG运动特性的基础上，建立了SGCMG群卫星姿态动力学模型和SGCMG群力矩输出矩阵，由此开展了SGCMG群操纵律研究及奇异性分析；结合SGCMG群卫星姿态动力学模型、运动学模型和PID控制器设计，搭建了敏捷卫星姿态控制闭环仿真系统，采用不考虑奇异规避的广义操纵律进行闭环仿真，通过遍历搜索的仿真运算，寻找分别经历无奇异、显奇异和隐奇异的典型目标姿态角组合，完成了敏捷卫星SGCMG群奇异规避算法的测试用例设计与验证，实现了对SGCMG群敏捷机动能力与系统指标的全面考核，极大提高了测试用例覆盖的全面性和有效性，具有现实的工程意义。

Abstract:

Aiming at the new technology of SGCMG cluster agile attitude maneuver, this paper studies a test design method of SGCMG cluster agile maneuver. Based on the analysis of the motion characteristics of SGCMG, the attitude dynamic model of SGCMG cluster satellite and the torque output matrix of SGCMG cluster are established, and the control law and singularity of SGCMG cluster are researched and analyzed. Combined with the attitude dynamics model, kinematics model and PID controller design of SGCMG cluster satellites, a closed-loop simulation system of attitude control for agile satellite is built. The closed-loop simulation is carried out by using the generalized control law without considering singular avoidance. The typical target attitude angles experiencing no singularity, manifest singularity and hidden singularity are searched through traversal search simulation operation. The design and validation of test cases for singular avoidance algorithm of SGCMG cluster agile satellites have been completed, and the comprehensive assessment of the agile maneuverability and system indexes of SGCMG cluster has been realized, which greatly improves the comprehensiveness and effectiveness of test case coverage and has practical engineering significance.