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http://dx.doi.org/10.5050/KSNVN.2006.16.11.1100

Performance Enhancement of Pneumatic Vibration Isolator in Low Frequency by Time Delay Control  

Oh, Ki-Yong (한국과학기술원 기계공학과)
Shin, Yun-Ho (한국과학기술원 기계공학과)
Lee, Jeung-Hoon (한국과학기술원 기계공학과)
Kim, Kwang-Joon (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.16, no.11, 2006 , pp. 1100-1107 More about this Journal
Abstract
As environmental vibration requirements on precision equipment become more stringent, use of pneumatic isolators has become more popular and their performance is subsequently required to be further improved. Performance of passive pneumatic isolators is related to various design parameters in a complicated manner and, hence, is very limited especially in low frequency range by chamber volume. In this study, transmissibility behavior of the pneumatic isolators depending on frequency and dynamic amplitude are presented. Then, an active control technique, time delay control, which is adequate for a low frequency nonlinear system, is applied. A procedure of applying the time delay control law to a pneumatic isolator is presented and it's effectiveness in the transmissibility performance is shown. Comparison between passive and active pneumatic isolators is made based on simulation.
Keywords
Pneumatic Isolator; Transmissibility; Robust Control; Time Delay Control;
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