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Improved disturbance rejection with online adaptive pole-zero compensation on a Φ-shaped PZT active suspension

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Abstract

In feedback control systems, the anti-resonant zeros cannot be arbitrarily placed, hence degrading tracking performance as well as input disturbance and noise rejection capabilities due to reduced gain at the frequencies of the zeros. In this paper, an online adaptive inverse control with saturation (OAICS) algorithm is proposed for compensating the minimum phase resonant poles and anti-resonant zeros of a PZT active suspension using measured position error signal. Experimental results on a Φ-shaped PZT active suspension using laser Doppler vibrometer (LDV) shows the proposed OAICS is effective in cancelling the first two dominant minimum phase pole-zero pairs to achieve high servo bandwidth and low sensitivity servo system with small overshoot during set-point tracking.

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Acknowledgments

The authors would like to thank S. S. Ge of Department of Electrical and Computer Engineering, National University of Singapore, for his constructive comments and valuable suggestions.

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Authors and Affiliations

  1. A*STAR Data Storage Institute, No. 5, Engineering Drive 1 (off Kent Ridge Crescent), Singapore, 117608, Republic of Singapore

    Chee Khiang Pang, Guoxiao Guo & Chunling Du

  2. Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117576, Republic of Singapore

    Chee Khiang Pang, Sai Cheong Tam, Ben M. Chen & Tong Heng Lee

  3. Automation and Robotics Research Institute, The University of Texas at Arlington, 7300 Jack Newell Blvd. S., Fort Worth, TX, 76118, USA

    Frank L. Lewis

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  1. Chee Khiang Pang
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  2. Sai Cheong Tam
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  3. Guoxiao Guo
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  4. Ben M. Chen
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  5. Frank L. Lewis
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  6. Tong Heng Lee
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  7. Chunling Du
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Correspondence to Chee Khiang Pang.

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Pang, C.K., Tam, S.C., Guo, G. et al. Improved disturbance rejection with online adaptive pole-zero compensation on a Φ-shaped PZT active suspension. Microsyst Technol 15, 1499–1508 (2009). https://doi.org/10.1007/s00542-009-0796-3

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  • DOI: https://doi.org/10.1007/s00542-009-0796-3

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