A hybrid control scheme that combines a self-tuning PID-feedback loop and TDC-based feedforward scheme is proposed in this study to cope with an active pneumatic vibration isolator. In order to establish an effective TDC feedforward control a reliable mathematical model of the pneumatic isolator is required and developed firstly. Numerical and experimental investigations on the validity of the mathematical model are performed. It is found that although slight discrepancy exists between predicted and observed behaviors of the system, the overall model performance is acceptable. The resultant model is then applied in the design of the TDC feedforward scheme. A neuro-based adaptive PID control is integrated with the TDC feedforward algorithm to form the hybrid control. Numerical and experimental isolation tests are carried out to examine the suppression performances of the proposed hybrid control scheme. The results show that the proposed hybrid control method outperforms solely TDC feedforward while the latter outperforms the passive isolation system. Moreover, the proposed hybrid control scheme can suppress the vibration near the system’s resonance.
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ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 26–29, 2018
Quebec City, Quebec, Canada
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-5185-2
PROCEEDINGS PAPER
Performance Enhancement of Pneumatic Vibration Isolators Using Self-Tuning PID Feedback and Time-Delay-Control (TDC)-Based Feedforward Scheme
Jin-Wei Liang,
Jin-Wei Liang
Ming Chi University of Technology, New Taipei City, Taiwan
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Hung-Yi Chen,
Hung-Yi Chen
Ming Chi University of Technology, New Taipei City, Taiwan
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Lyu-Cyuan Zeng
Lyu-Cyuan Zeng
Ming Chi University of Technology, New Taipei City, Taiwan
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Jin-Wei Liang
Ming Chi University of Technology, New Taipei City, Taiwan
Hung-Yi Chen
Ming Chi University of Technology, New Taipei City, Taiwan
Lyu-Cyuan Zeng
Ming Chi University of Technology, New Taipei City, Taiwan
Paper No:
DETC2018-85131, V008T10A051; 7 pages
Published Online:
November 2, 2018
Citation
Liang, J, Chen, H, & Zeng, L. "Performance Enhancement of Pneumatic Vibration Isolators Using Self-Tuning PID Feedback and Time-Delay-Control (TDC)-Based Feedforward Scheme." Proceedings of the ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 8: 30th Conference on Mechanical Vibration and Noise. Quebec City, Quebec, Canada. August 26–29, 2018. V008T10A051. ASME. https://doi.org/10.1115/DETC2018-85131
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