CISUC

A Study of Failure Models in Feedback Control Systems

Authors

Abstract

Feedback Control Systems have a peculiar behavior that allows them to compensate for disturbances in the controlled application. This paper investigates whether this resilience also extends to disturbances originating from faults in the controller itself. The question of what kind of failure model is more effective in this type of system is addressed, with three different models being studied: arbitrary failure, fail silent, and fail-bounded.
The study is conducted essentially by experimental fault-injection in the controller of one of the best known and most demanding of the benchmarks used in the control systems area: an inverted pendulum. The considered failure models are compared according to criteria based on the quality of the control action. Other insights gained from the experiments made are described, for instance on how to significantly increase dependability at a very low-cost in feedback controllers, and on the need for a different kind of real-time scheduling algorithms.

Keywords

System Fault-Tolerance, Fault-Injection, Real-Time, Failure Models, Feedback Control Systems

Subject

Fault-Tolerance in Control Systems

Conference

The International Conference on Dependable Systems and Networks, DSN-2001, June 2001


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Year 2013 : 1 citations

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Year 2011 : 3 citations

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Year 2010 : 2 citations

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Year 2009 : 3 citations

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Year 2008 : 1 citations

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Year 2007 : 1 citations

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Year 2005 : 3 citations

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Year 2003 : 6 citations

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Year 2002 : 2 citations

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