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Paper FrC8.4

Ishikawa, Kaoru (Chuo University), Nakamura, Taro (Chuo University), osumi, hisashi (Chuo University)

Reliable Control During Current Loop Failure Using ETF for Position Servo System Including Disturbance Observer

Scheduled for presentation during the Regular Sessions "Motion Control - I" (FrC8), Friday, May 15, 2009, 14:30−14:50, Room: 406

2009 IEEE International Conference on Robotics and Automation, May 12 - 17, 2009, Kobe, Japan

This information is tentative and subject to change. Compiled on January 24, 2022

Keywords Motion Control, Industrial Robots, Medical Robots and Systems

Abstract

A reliable control method is proposed for multiple loop control systems. If a feedback loop fails (e.g., as a result of a sensor breakdown), the control system develops an unstable fluctuation. To cope with this problem, the proposed method uses an equivalent transfer function (ETF) for active redundancy compensation after loop failure. The ETF is used to maintain the transfer function of the entire system the same before and after loop failure. In this study, the characteristics of a reliable control system that uses an ETF were examined experimentally. A position servo system including a disturbance observer is used in the experiment. In case of feedback loop failure, the control system could not be stabilized using the disturbance observer alone; however, the ETF stabilized the control system after feedback loop failure.

 

 

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