| 摘要: |
|
| 关键词: |
| DOI： |
| Received:April 23, 2007Revised:September 26, 2008 |
| 基金项目: |
|
| Fault-tolerant control systems design via subdivision of parameter region |
| Xiaozheng JIN, Guanghong YANG |
| (Key Laboratory of Integrated Automation for the Process Industry, Ministry of Education, and
College of Information Science and Engineering, Northeastern University, Shenyang Liaoning 110004, China) |
| Abstract: |
| This paper presents a linear matrix inequality (LMI) approach to solve the fault-tolerant control (FTC) problem of actuator faults. The range of actuator faults is considered as a parameter region and subdivided into several
subregions to achieve a certain desired performance specification. Based on the integral quadratic constraint (IQC) approach, a passive fault-tolerant controller for the whole fault region and multiple fault-tolerant controllers for each fault subregion are designed for guaranteeing stability and improving performance of the FTC system, respectively. According to the estimation of parameters by FDI process, the corresponding subregion controller is chosen for the stability and optimal performance of closed-loop systems when the fault occurs. The case of incorrect estimation is also considered by comparing the performance index between the switched controller and the passive fault-tolerant controller. The proposed design technique is finally evaluated in the light of a simulation example. |
| Key words: Fault-tolerant control Actuator failure Switching control Parameter region Optimal performance |
