Set-based Fault-Tolerant Control of Convex Polytopic LPV Systems using a Bank of Virtual Actuators
Set-based Fault-Tolerant Control of Convex Polytopic LPV Systems using a Bank of Virtual Actuators
复制标题
使用一组虚拟执行器对凸多面 LPV 系统进行基于集的容错控制
DOI：
10.3182/20140824-6-za-1003.02080
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
J. Doná
中科院分区：
文献类型：
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作者：
Raheleh Nazari;M. Seron;J. Doná
摘要针对具有线性变参数（LPV）不确定性模型描述的系统，提出了一种鲁棒执行器容错控制策略。该方案采用了基于集合的鲁棒故障检测和识别（FDI）方法和虚拟执行器（VA）银行。一个有趣的特点是，虚拟执行器用于FDI和控制器重构（CR）任务。鲁棒FDI方法基于为可测量的残余信号定义的相关集合的分离，所述残余信号基于虚拟致动器信号并且考虑模型不确定性、噪声和过程干扰来计算。对于CR，每个VA被设计为与标称控制器（为无故障工厂设计）充分结合操作，以在所考虑的故障场景范围内针对特定故障情况实现正确的重新配置。由此产生的鲁棒容错控制方案，确保闭环系统的轨迹下的执行器故障的情况下，范围很广的有界性。通过一个仿真例子说明了该方案的性能。
Abstract We propose a robust actuator fault tolerant control strategy for systems with linear parameter varying (LPV) uncertainty model description. The scheme employs a set-based robust fault detection and identification (FDI) approach and a bank of virtual actuators (VA). An interesting feature is that the virtual actuators are used both for FDI and controller reconfiguration (CR) tasks. The robust FDI method is based on the separation of relevant sets defined for measurable residual signals, which are computed based on the virtual actuator signals and taking into account model uncertainty, noises and process disturbances. For CR, each VA is designed to operate adequately in combination with a nominal controller (designed for the fault-free plant) to achieve correct reconfiguration for a particular fault situation in a considered range of fault scenarios. The resulting robust fault tolerant control scheme ensures boundedness of the closed-loop system trajectories under a wide range of actuator fault scenarios. The performance of the scheme is illustrated through a simulation example.