标题：Robust optimal H-i/H fault detection and its applications in a TGSCM control system
作者：Zhong, Maiying; Li, Shusheng
作者机构：[Zhong, Maiying] Shandong Univ Sci & Technol, Coll Elect Engn & Automat, Qingdao 266590, Peoples R China.; [Li, Shusheng] Beijing Univ Aeronaut & As 更多
通讯作者地址：[Zhong, MY]Shandong Univ Sci & Technol, Coll Elect Engn & Automat, Qingdao 266590, Peoples R China.
来源：TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
关键词：Fault detection filter; H-i; H optimization; three-axis gyro-stabilized; camera mount
摘要：This paper aims to deal with the problem of fault detection in a closed-loop mode for a three-axis gyro-stabilized camera mount under the consideration of unknown disturbances. First, the influences of potential actuator and sensor faults are analysed and, based on this, the faults model as well as an equivalent additive fault input are introduced. For the purpose of fault detection, an observer-based fault detection filter is considered to generate the residual. The sensitivity of the residual to fault is evaluated by the non-zero singular values of the transfer function from fault to residual, whereas the robustness to disturbance is represented by the H-norm of the transfer function from disturbance to residual. To obtain a maximum sensitivity/robustness ratio criterion, the design of fault detection filter is formulated as an H-i/H optimization problem and the unified solutions for the optimization criterion are given. For residual evaluation, a window evaluation function is developed and an analysis of threshold selection is given to reduce the conservativeness of fault detection. Finally, experimental results are presented to demonstrate the effectiveness of the proposed method. It is demonstrated that the proposed method can effectively detect the provided fault as soon as possible.