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| 1 | 闭环系统故障诊断技术综述显示文摘本文着眼于闭环环境下动态系统中的故障诊断问题.介绍了目前闭环系统故障诊断的研究意义,特别关注了开闭环故障诊断的不同,并概述了现有的闭环系统故障诊断方法.通过仿真实验比较了典型开环系统和闭环系统中故障诊断的不同性能.最后探讨了闭环系统故障诊断研究中亟待解决的问题以及未来可能的研究方向. | 周东华 刘洋 何潇 | 2013 | 自动化学报2013，39，11： | 106 |
| 2 | Sensor fault-tolerant observer applied in UAV anti-skid braking control under control input constraint显示文摘This paper proposes a method for addressing the problem of sensor fault-tolerant control(FTC) for anti-skid braking systems(ABSs). When the wheel velocity sensor of the ABS for unmanned aerial vehicles(UAVs) becomes faulty, wheel velocity failure and feedback instability may occur. Firstly, a fault diagnosis and isolation(FDI) method based on a sliding mode observer approach is introduced to detect and isolate the fault of the sensor. When the wheel velocity sensor is in healthy conditions, the observer works in a diagnosis mode. If faults occur in the sensor,it acts as a wheel velocity estimator. Secondly, an FTC strategy,adopting a feedback compensation structure, is designed with input control constraints. In addition, based on the FDI result, a terminal sliding mode(TSM) controller is designed to guarantee that slip-ratio tracks its appropriate reference values in situations where runways change conditions during landing. The control system switches automatically from control using a wheel velocity sensor to sensorless control mode, so the observer-based FTC scheme is established. It is logical that the ABS keeps observedstate and remains stable when the wheel velocity sensor is broken and during external disturbance. Finally, simulation results show the effectiveness of the proposed method. | Hui Sun Jianguo Yan Yaohong Qu Jie Ren | 2017 | Journal of Systems Engineering and Electronics2017，28，1： | 1 |
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