Active versus passive fault tolerant control of a High Redundancy Actuator
Control Conference(2009)
摘要
The High Redundancy Actuator (HRA project investigates the use of large numbers of small actuation elements to achieve fault tolerance. The large number of components involved poses a unique challenge from a control perspective. This paper presents the two main options to control the HRA: using robust control (passive fault tolerance), and reconfigurable control (active fault tolerance). The robust controller is designed using H∞ methods, and handles the different system behaviours of the HRA with only small changes to the closed-loop system. In contrast, control reconfiguration detects the fault and changes the control laws accordingly. Multi-Agent System (MAS) concepts are used to apply localised multiple-model control and fault detection on an individual element level. The results of both approaches are compared to illustrate the trade-off between the complexity of the control approach and the resulting performance under different fault situations.
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关键词
h∞ control,actuators,closed loop systems,control system synthesis,fault diagnosis,fault tolerant control,multi-robot systems,robust control,h∞ methods,hra project,mas concept,active-passive fault tolerant control,closed-loop system,fault detection,high redundancy actuator,localised multiple-model control,multiagent system,reconfigurable control,robust controller design,active fault tolerance,control reconfiguration,fault accommodation,fault-tolerant control,multi-agent systems,passive fault tolerance,redundancy,robustness
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