The paper proposes a methodology to effectively address the increasingly important problem of distributed fault-tolerant control for large-scale interconnected systems. The approach dealt with combines, in a holistic way, a distributed fault detection and isolation algorithm with a specific tube-based model predictive control scheme. A distributed fault-tolerant control strategy is illustrated to guarantee overall stability and constraint satisfaction even after the occurrence of a fault. In particular, each subsystem is controlled and monitored by a local unit. The fault diagnosis component consists of a passive set-based fault detection algorithm and an active fault isolation one, yielding fault-isolability subject to local input and state constraints. The distributed active fault isolation module–thanks to a modification of the local inputs–allows to isolate the fault that has occurred, avoiding the usual drawback of controllers that possibly hide the effect of the faults. The Active Fault Isolation method is used as a decision support tool for the fault-tolerant control strategy after fault detection. The distributed design of the tube-based model predictive control allows the possible disconnection of faulty subsystems or the reconfiguration of local controllers after fault isolation. Simulation results on a well-known power network benchmark show the effectiveness of the proposed methodology.

中文翻译：

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大型系统的分布式容错控制：一种主动故障诊断方法

本文提出了一种方法，可以有效解决大规模互连系统中越来越重要的分布式容错控制问题。该方法以整体方式将分布式故障检测和隔离算法与特定的基于管的模型预测控制方案结合在一起。说明了一种分布式容错控制策略，即使在发生故障后也可以保证总体稳定性和约束满足性。特别地，每个子系统由本地单元控制和监视。故障诊断组件包括基于被动集的故障检测算法和主动故障隔离算法，从而产生受本地输入和状态约束的故障可隔离性。分布式有源故障隔离模块（由于修改了本地输入），可以隔离已发生的故障，避免了控制器可能会掩盖故障影响的常见缺陷。主动故障隔离方法用作故障检测后的容错控制策略的决策支持工具。基于管的模型预测控制的分布式设计允许故障隔离后断开有故障的子系统的连接或重新配置本地控制器。在著名的电网基准测试中的仿真结果表明了该方法的有效性。主动故障隔离方法用作故障检测后的容错控制策略的决策支持工具。基于管的模型预测控制的分布式设计允许故障隔离后断开有故障的子系统的连接或重新配置本地控制器。在著名的电网基准测试中的仿真结果表明了该方法的有效性。主动故障隔离方法用作故障检测后的容错控制策略的决策支持工具。基于管的模型预测控制的分布式设计允许故障隔离后断开有故障的子系统的连接或重新配置本地控制器。在著名的电网基准测试中的仿真结果表明了该方法的有效性。