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Title: Active vibration isolation based on model reference adaptive control
Authors: Liu, L.
Tan, K.K. 
Guo, Y.
Cong, M.
Lee, T.H. 
Keywords: active vibration isolation
composite control
flexible spacecraft
jitter attenuation
Stewart platform
Issue Date: 1-Feb-2014
Citation: Liu, L., Tan, K.K., Guo, Y., Cong, M., Lee, T.H. (2014-02-01). Active vibration isolation based on model reference adaptive control. International Journal of Systems Science 45 (2) : 97-108. ScholarBank@NUS Repository.
Abstract: High-performance instruments are very sensitive to vibrations and jitters. In this article, a new approach towards multi-degree-of-freedom (DOF) active vibration isolation and its application in spacecraft jitter suppression are presented. Model reference adaptive control (MRAC) with acceleration feedback is used to isolate random disturbances. However, a side effect of this algorithm is that displacements at low frequencies are amplified. Thus, the MRAC is augmented with proportional-integral-differential (PID) displacement feedback to suppress vibration displacements. The MRAC-PID composite control is applied to a 4-leg platform to isolate vibrations and suppress tip/tilt jitters. The scheme is also used to isolate 6-DOF vibrations and steer the payload of a flexible spacecraft. Satisfactory performance of vibration isolation and jitter attenuation has been observed. © 2014 Taylor and Francis.
Source Title: International Journal of Systems Science
ISSN: 00207721
DOI: 10.1080/00207721.2012.683834
Appears in Collections:Staff Publications

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