Reliable Observer-Based Control Against Sensor Failures for Systems With Time Delays in Both State and Input
Reliable Observer-Based Control Against Sensor Failures for Systems With Time Delays in Both State and Input
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DOI：
10.1109/tsmca.2008.923050
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发表时间：
2008-09
期刊：
影响因子：
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通讯作者：
Zhiwei Gao;T. Breikin;Hong Wang
中科院分区：
文献类型：
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作者：
Zhiwei Gao;T. Breikin;Hong Wang
针对状态时滞和输入时滞同时存在的系统，提出了一种新的状态和传感器故障观测器，用于同时估计系统状态和传感器故障。在该设计中，采用了广义系统方法和线性矩阵不等式技术，其中考虑的传感器故障可以是任何形式的，甚至是无界的。传感器的无界故障会使系统发生不可预测的故障，因此必须针对传感器故障设计可靠的控制方案。利用估计的状态和传感器故障，提出了一种可靠的基于模糊控制器的控制器，使系统在传感器故障或未发生故障的情况下都能正常工作。目前的方法是下一个扩展到多个时间延迟系统的情况下。最后，一个三个级联电抗器网络的仿真例子来说明设计过程，并证明本技术的有效性。
For systems with both state and input time delays, a novel state and sensor fault observer is proposed in this paper to estimate system states and sensor faults simultaneously. In this design, a descriptor system approach and a linear matrix inequality technique are adopted, where the considered sensor fault may be in any form, even unbounded. Unbounded sensor faults will make the system fail unavoidably; it is indispensable to derive a reliable control scheme against sensor failures. Using the estimated state and sensor fault, a reliable observer-based controller is proposed, which makes the system work well no matter whether sensor faults occur or not. The present approaches are next extended to the case for systems with multiple time delays. Finally, a simulation example of the network of three cascaded reactors is used to illustrate the design procedure and demonstrate the efficiency of the present techniques.