Integrated fault-tolerant control approach for linear time-delay systems using a dynamic event-triggered mechanism

Abstract

In this study, a novel integrated fault estimation (FE) and fault-tolerant control (FTC) design approach is developed for a system with time-varying delays and additive fault based on a dynamic event-triggered communication mechanism. The traditional static event-triggered mechanism is modified by adding an internal dynamic variable to increase the inter-event interval and decrease the amount of data transmission. Then, a dynamical observer is designed to estimate both the system state and the unknown fault signal simultaneously. A fault estimation-based FTC approach is then given to remove the effects generated by unknown actuator faults, which guarantees that the faulty closed-loop systems are asymptotical stable with a disturbance attenuation level γ. By theory analysis, the Zeno phenomenon is excluded in this study. Finally, a real aircraft engine example is provided to illustrate the feasibility of the proposed integrated FE and FTC method.

Keywords:

• Fault-tolerant control
• fault estimation
• event-triggered control
• H-infinity control

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was partially supported by the China Scholarship Council (201808320016), the National Key Research and Development Program (SQ2019YFB10029), the Post Doctoral Research Foundation of Jiangsu Province (1701140B), the GF Research and Development Program of the Nanjing Tech University (201709).

Notes on contributors

M. S. Qian

M. S. Qian currently is Associate Professor in Nanjing Tech University, China. Her research interests include fault tolerant control, robust control, time delay and interconnected systems.

X. G. Yan

X. G. Yan currently is Senior Lecturer in the University of Kent, UK. His research interests include sliding mode control, time delay systems, interconnected systems and fault detection and isolation.