Experiment evaluation of reliable control using equivalent transfer function for speed feedback loop failure

• Published in: SICE 2004 Annual Conference Vol. 2; pp. 955 - 959 vol. 2
• Main Authors: Imaizumi, T., Ohmae, T.
• Format: Conference Proceeding
• Language: English
• Published: Tokyo IEEE 2004; Society of Instrument and Control Engineers
• Subjects: Control systems; Electrical equipment industry; Exact sciences and technology; Feedback loop; Fracture mechanics (crack, fatigue, damage...); Fundamental areas of phenomenology (including applications); Industrial control; Microcomputers; Physics; Position control; Redundancy; Sensor systems; Solid mechanics; Stability; Structural and continuum mechanics; Transfer functions; Transducer position; Active system; Redundancy; Position control; Multiple system; Rupture; Position sensor; Position measurement; Feedback regulation; Multiple loop regulation; Transfer function; Failures
• ISBN: 9784907764227; 4907764227

In this paper, a reliable control method is proposed for a position control system using multiple loops. If a speed feedback loop fails, such as a case of the speed sensor break down, the position control system becomes unstable and has a big fluctuation. To cope with this problem, the proposed method uses an equivalent transfer function (ETF) as an active redundancy compensation after the loop failure. The ETF is designed so that it does not change the transfer function of the whole system before and after the loop failure. Therefore, the stability of the position control system using this proposed system is guaranteed even if the speed feedback loop fails. The effectiveness of this proposed system is confirmed by the experimental results.