中文摘要：

研究了反作用飞轮的故障诊断问题.针对反作用飞轮的非线性数学模型,分析了其故障模式,建立了其故障的参数化描述方法,并在此基础上提出了一种基于参数自适应投影的反作用飞轮故障诊断方法.该方法通过构造观测器,利用参数自适应投影算法来更新参数信息,保证观测器的误差收敛到零.最后对飞轮的正常模式和3种故障模式进行了物理仿真实验,结果表明提出的方法有效可行.

英文摘要：

The design of fault diagnosis for reaction wheel（RW） is presented in this paper.First,based on a nonlinear RW mathematic model,the fault modes of RW are analyzed and parameterized descriptions for faults are established.Then the observer for fault diagnosis of RW is brought forward by using an adaptive projective algorithm.The parameters are updated by the adaptive algorithm,this ensures the error of observer to be converged to zero.Finally physical simulations in normal case and three fault cases demonstrate that the proposed approach is effective and feasible.