Reliable control using equivalent transfer function for control system with multiple minor-loop

In this paper, a control method is proposed for minor-loop failure in a multi-loop control system. If a minor-loop fails, because of a problem with the sensor, the character of the whole system changes greatly and becomes unstable. For this situation the proposed method changes to a new compensator...

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Bibliographic Details
Main Authors: Imaizumi, T., Ohmae, T.
Format: Conference Proceeding
Language:English
Subjects:
Control systems
Electrical equipment industry
Equations
Feedback loop
Precision engineering
Redundancy
Reliability engineering
Sensor systems
Stability
Transfer functions
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Summary:In this paper, a control method is proposed for minor-loop failure in a multi-loop control system. If a minor-loop fails, because of a problem with the sensor, the character of the whole system changes greatly and becomes unstable. For this situation the proposed method changes to a new compensator using an equivalent transfer function (ETF) after the minor-loop failure. The equivalent transfer function is designed so that it does not change the transfer function of the whole system before and after the minor-loop failure. Using this method, the stability of the control system in the minor-loop failure is guaranteed.
DOI:10.1109/IECON.2003.1280050