基于事件触发的故障诊断与动态调节集成设计

An integrated design of event-triggered fault diagnosis and dynamic fault accommodation

本文发展了一种事件触发采样与更新检测机制、故障诊断及调节的集成设计框架.事件触发技术不仅用于传感器端,同时也用于容错控制器端.所设计的故障诊断观测器能够应用基于事件触发的非均匀采样输出同时估计故障和系统状态,基于所获得的状态和估计信息,构造事件触发更新检测器和动态容错控制器,进而借助于增广系统方法来集成设计两个事件触发检测器、故障诊断观测器和容错控制器,以保证故障系统的性能,同时尽可能的降低传感器、控制器、执行器三者之间的信息传输频率.仿真实例验证了所提方法的可行性和优越性.

An integrated design framework of event-triggered sampling and updating mechanism,fault diagnosis and fault accommodation is developed in this paper.The event-triggered technique is applied to both sensor node and fault tolerant controller node.A fault diagnosis observer is firstly designed to estimate the fault and the state simultaneously using the event-triggered nonuniform sampled output.Based on the obtained fault and state information,an event-triggered updating detector and a dynamic fault tolerant controller are then constructed.The augmented system approach is further employed to design the two detectors,the fault diagnosis observer and fault tolerant controller simultaneously,not only to guarantee the performance of the faulty system,but also to reduce the information transfer frequency among the sensor,controller and actuator.Simulation results are finally provided to illustrate the effectiveness and superiority of the proposed approach.