This paper describes a novel passivity/dissipativity based approach for fault tolerant control (FTC) of nonlinear systems by means of fault hiding, i.e., by inserting reconfiguration blocks (RBs) between the plant and controller to mitigate the fault effects. The proposed approach is used to design a new kind of RB, called passivation block (PB), which is generically employed for sensor and actuator faults and achieves simultaneously series, feedback and feedfoward passivation of the controller during a fault occurrence. Based on the dissipativity theory, new conditions are obtained to design a dynamic PB (DPB) which requires minimum information on the system model. In particular, the proposed DPB can be systematically obtained by combining the LMI-based conditions based on the knowledge about the passivity indices. Numerical simulations are carried out and indicate that the PBs are able to stabilize an example of a faulty nonlinear system.

本文介绍了一种基于无源/耗散性的非线性系统容错控制的新方法，即通过故障隐藏，即在工厂和控制器之间插入重构块（RB）来减轻故障影响，从而实现非线性系统的容错控制（FTC）。所提出的方法用于设计一种新型的RB，称为钝化块（PB），通常用于传感器和执行器故障，并在故障发生期间同时实现控制器的串联，反馈和前馈钝化。基于耗散理论，获得了设计动态PB（DPB）的新条件，该动态PB需要关于系统模型的最少信息。特别是，可以基于有关无源性指标的知识，通过组合基于LMI的条件来系统地获得所提出的DPB。