基于lipschitz非线性滑模观测器的卫星故障检测

• 作 者: 王征 李言俊 张科
• 机 构: 西北工业大学航天学院,
• 出 处: 空间科学学报
• 发表日期: 2011年06期
• 关键词: 航天器 卫星 线性矩阵不等式 滑模观测器 Spacecraft Satellite Linear matrix inequality Sliding-mo

航天器模型存在非线性问题,但其小角度在轨运行时满足lipschitz条件,可以在这种情况下进行故障检测,提高系统的安全性.应用滑模非线性观测器,针对多执行器设计了多通道故障检测观测器,通过Lyapunov函数对其收敛性进行证明.结果表明,观测器不仅能够实现故障检测,还能够实现故障的隔离,并利用反证法进行了说明.应用线性矩阵不等式,给出了观测器参数的求解,进而对卫星建模及仿真,与线性化方法进行比对,验证了算法的有效性.

The spacecraft model has nonlinear problems, but it meets the lipschitz condition when the small-angle on-orbit is running, so fault detection can be carried out in this case to improve the safety of the system.Using sliding mode nonlinear observer and multi-actuator design The multi-channel fault detection observer is proved by the Lyapunov function. The results show that the observer not only can realize the fault detection, but also can isolate the fault and prove it by using the inverse matrix method. Using the linear matrix inequality Observer parameters, and then compared the satellite modeling and simulation with the linearization method to verify the effectiveness of the algorithm.