Li Xue, Fan Zhikang, Wang Shengfeng, Qiu Aibing, Mao Jingfeng
School of Electrical Engineering, Nantong University, Nantong 226019, China.
Sensors (Basel). 2022 Mar 23;22(7):2480. doi: 10.3390/s22072480.
This paper investigates a design framework for a class of distributed interconnected systems, where a fault diagnosis scheme and a cooperative fault-tolerant control scheme are included. First of all, fault detection observers are designed for the interconnected subsystems, and the detection results will be spread to all subsystems in the form of a broadcast. Then, to locate the faulty subsystem accurately, fault isolation observers are further designed for the alarming subsystems in turn with the aid of an adaptive fault estimation technique. Based on this, the fault estimation information is used to compensate for the residuals, and then isolation decision logic is conducted. Moreover, the cooperative fault-tolerant control unit, where state feedback and cooperative compensation are both utilized, is introduced to ensure the stability of the whole system. Finally, the simulation of intelligent unmanned vehicle platooning is adopted to demonstrate the applicability and effectiveness of the proposed design framework.
本文研究了一类分布式互联系统的设计框架，其中包括故障诊断方案和协同容错控制方案。首先，为互联子系统设计故障检测观测器，检测结果将以广播形式传播到所有子系统。然后，为发出警报的子系统依次进一步设计故障隔离观测器，借助自适应故障估计技术来准确地定位故障子系统。基于此，利用故障估计信息对残差进行补偿，然后进行隔离决策逻辑。此外，引入同时利用状态反馈和协同补偿的协同容错控制单元，以确保整个系统的稳定性。最后，通过智能无人车辆编队的仿真来证明所提出设计框架的适用性和有效性。
