Adaptive Control of Vibration Using FXLMS Algorithm With Online Secondary Path Modeling
Date Issued
2008
Date
2008
Author(s)
Lee, Jia-Hung
Abstract
This paper studied the designing of active adaptive control systems to control the vibration characteristics of a structure. For low-damping structure systems, it will produce violent vibration to cause damage of structure when systems received the influence of resonance frequency. he paper used adaptive filter as the controller of systems. It adopt FXLMS algorithm and online secondary path modeling. And used the feedback signal of FIR filter and the feedback of error signal to produce reference signal. By the way of the reference(input) signal and the error signal adjust weight parameters to make the control force of the output reach optimum, and to suppress the vibration of the beam.he system controller is PC-based, using real-time windows target to implement the algorithm. In addition to the algorithm, the system collocates circuit of processing piezoelectric sensor、circuit of signal processing(amplify、filtering)、circuit of signal acquisition(A/D、D/A) and circuit of driving piezoelectric actuator to constitute active control system.xperimental results on control of vibration show that single mode reduces about 20dB and multimode reduces more then 10dB. So, it shows that the adaptive controller by using the filtered-X LMS control algorithm can reduce the structure vibration efficiently.
Subjects
adaptive control
FXLMS
secondary path modeling
online
algorithm
vibration control
Type
thesis
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