【作者】 骆天依； 李化义； 孟庆松； 刘明；

【Author】 LUO Tian-yi;LI Hua-yi;MENG Qing-song;LIU Ming;School of Astronautics,Harbin Institute of Technology;School of Automation,Harbin University of Science and Technology;

【机构】 哈尔滨工业大学航天学院； 哈尔滨理工大学自动化学院；

【摘要】 针对航天器姿态控制系统执行器和传感器同时发生故障的问题,提出了一种基于广义自适应滑模观测器技术的状态估计和故障重构方法。首先将航天器姿控系统动力学模型转换成状态空间模型,并进行适当状态变换,将传感器故障等效考虑成伪执行器故障;其次,设计了一种广义自适应滑模观测器对系统状态变量进行在线估计,并利用线性矩阵不等式方法给出了系统化观测器矩阵的求解办法;随后,进一步利用误差状态沿滑模面收敛的思想,实现系统故障的重构问题;最后,通过仿真算例验证了本文所提出方法的有效性。更多还原

【Abstract】 A state estimation and fault reconstruction method based on generalized adaptive sliding mode observer technology is proposed to solve the problem of simultaneous failure of actuator and sensor in the spacecraft attitude control system. Firstly, the dynamic model of the spacecraft attitude control system is converted into a state-space model, and the appropriate state transformation is performed to equivalently consider the sensor failure as a pseudo-actuator failure. Secondly, a generalized adaptive sliding mode observer is designed to estimate the system state variables online, and the solution of the systematic observer matrix is given by using the linear matrix inequality(LMI) method. Then, the fault reconstruction of the system is realized by using the idea of error state convergence along the sliding mode surface.Finally, the effectiveness of the proposed method is verified by a simulation example.更多还原