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Fault Tolerant Control Using Self-Diagnostic Smart Actuator
Inseok Yang,Kyungmin Kang(번역자),Dongik Lee2 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, a networked fault tolerant control strategy that utilizes a self-diagnostic smart actuator is presented with an application to “"steer-by-wire”" (SBW) which is a network based steering system for intelligent cars. Networked control systems (NCS) like SBW have various advantages, such as easy maintenance, low cost implementation and reconfiguration ability. In NCS, it is possible to achieve bi-directional communications using intelligent subsystems called “"smart actuators.”" Using a built-in processing unit and bi-directional communication, a smart actuator can offer the capability of self-diagnosis and self-compensation resulting in a high level of dependability. This paper highlights the usefulness of such smart actuators from the point of view of enhancing the ability of tolerating actuator faults without any redundant actuators. The proposed approach is mainly relying on an actuator performance index, called effectiveness factor, which can be obtained through self-diagnosis performed by the built-in actuator processor. Simulation results with a SBW system show that the proposed smart actuator-based control system provides fast and accurate control strategy to tolerate faults.
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