Fast fault estimation and accommodation for dynamical systems

作者：Zhang K^*; Jiang B; Shi P

来源：IET Control Theory and Applications, 2009, 3(2): 189-199.

DOI：10.1049/iet-cta:20070283

The problem of fast active fault-tolerant control is studied using adaptive fault diagnosis observer (AFDO). Existence conditions for linear time-invariant system are first introduced to verify whether or not the adaptive observer for fault diagnosis exists. Then a novel fast adaptive fault estimation (FAFE) algorithm is proposed to enhance the performance of fault estimation. Using the on-line obtained fault information, the observer-based fault tolerant controller based on the separation property is designed to compensate for the loss of actuator effectiveness by stabilising the closed-loop system. Furthermore, an extension to a class of nonlinear systems is extensively investigated. Finally, simulation results are presented to illustrate the efficiency of the proposed techniques.

• 出版日期2009-2
• 单位南京航空航天大学