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Model reduction and active control of flexible beam using internal balance technique
Authors:Yong XIE  Tong ZHAO  Guo-ping CAI
Affiliation:Department of Engineering Mechanics, State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University, Shanghai 200240, P. R. China
Abstract:The internal balance technique is effective for the model reduction in flexible structures,especially the ones with dense frequencies.However,due to the difficulty in extracting the internal balance modal coordinates from the physical sensor readings,research on this topic has been mostly theoretical so far,and little has been done in experiments or engineering applications.This paper studies the internal balance method theoretically as well as experimentally and designs an active controller based on the reduction model.The research works on a digital signal processor (DSP) TMS320F2812-based experiment system with a flexible beam and proposes an approximate approach to access the internal balance modal coordinates.The simulation and test results have shown that the proposed approach is feasible and effective,and the designed controller is successful in restraining the beam vibration.
Keywords:flexible beam  internal balance model reduction  active control  experiment
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