Bank of virtual actuators for fault tolerant control
Bank of virtual actuators for fault tolerant control
复制标题
用于容错控制的虚拟执行器组
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
J. Richter
中科院分区：
文献类型：
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作者：
M. Seron;J. Doná;J. Richter
摘要提出了一种基于虚拟执行器的执行器容错控制方案，其新的特点是虚拟执行器隐含地集成了故障检测与隔离（FDI）和控制器重构（CR）任务。该银行的VA运行在闭环系统中的一个基于跟踪控制器的标称（无故障）模型的植物。我们考虑突然的执行器故障范围在有限覆盖。每个VA被设计为与标称控制器适当地结合操作，以在所考虑的范围内针对特定故障情况实现正确的CR。接合来自组的合适VA的切换规则基于针对直接从虚拟致动器信号构建的可测量的残余信号定义的集合。整个计划，以保证闭环有界性和设定点跟踪所有考虑的故障情况下。并将该方法应用于飞机侧向控制的算例。
Abstract We propose an actuator fault tolerant control scheme based on a bank of virtual actuators (VA), with the novel feature that the virtual actuators implicitly integrate both fault detection and isolation (FDI) and controller reconfiguration (CR) tasks. The bank of VAs operates in closed-loop with an observer-based tracking controller designed for a nominal (fault free) model of the plant. We consider abrupt actuator faults ranging over a finite cover. Each VA is designed to operate appropriately in combination with the nominal controller to achieve correct CR for a particular fault situation in the considered range. A switching rule that engages the suitable VA from the bank is based on sets defined for measurable residual signals constructed directly from the virtual actuators signals. The overall scheme is shown to guarantee closed-loop boundedness and setpoint tracking under all considered fault situations. The method is applied to an example of aircraft lateral control.