CAJ | 학술논문

针对一类满足 Lipschitz条件的非线性系统，设计了一组非线性未知输入观测器，并依据故障解耦的思想，产生结构化的残差集，实现非线性系统执行器的故障隔离。研究考虑了未知扰动对非线性系统的影响，并利用Lyapunov理论证明了所设计观测器的稳定性。最后，以三轴稳定卫星的姿态控制系统为对象，仿真验证了所提方法对各种典型执行器故障诊断的有效性。
침대일류만족 Lipschitz조건적비선성계통，설계료일조비선성미지수입관측기，병의거고장해우적사상，산생결구화적잔차집，실현비선성계통집행기적고장격리。연구고필료미지우동대비선성계통적영향，병이용Lyapunov이론증명료소설계관측기적은정성。최후，이삼축은정위성적자태공제계통위대상，방진험증료소제방법대각충전형집행기고장진단적유효성。
In this paper,we study the fault diagnosis of spacecraft actuators for a class of nonlinear system with Lipschitz constraints.To isolate the faulty actuator from others,we propose a bank of isolation observers to generate the structured residuals.Each isolation observer is designed based on nonlinear unknown input idea of decoupling the actuator fault as disturbance.The robust stability of the observer is analyzed with the Lyapunov theory.Finally,the proposed approach is applied to three-axis stabilized satellite attitude control system,and the effectiveness of the approach is verified for typical faults diagnosis of the satellite actuators.