STUDY ON ACTIVE VIBRATION CONTROL OF CANTILEVER BEAM USING PIEZOELECTRIC SELF-SENSING ACTUATOR IN TIME-SHARING FASHION

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (10) : 150-153.

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STUDY ON ACTIVE VIBRATION CONTROL OF CANTILEVER BEAM USING PIEZOELECTRIC SELF-SENSING ACTUATOR IN TIME-SHARING FASHION

Dong Weijie1;Jia Yanli2;Yang Minggang2

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Abstract

A method that a piezoelectric ceramic sensor is also used as an actuator during the sampling intervals in the application of active vibration control is proposed. A sensing-actuating period consists of sensing timeslot, actuation timeslot and discharge timeslot. In the three timeslots, vibration measurement, vibration control and releasing the residual charge are implemented respectively. Sequential circuit controls the switching of the three timeslots. Technical details such as sequential logic design and switching circuit are discussed. Experiments prove that the switching between sensing and actuation does not affect the function of piezoelectric sensor. In addition, the actuation capability lies on the actuation timeslot percentage of the sensing-actuating period. Based on cantilever’s modal analysis, the first modal control of cantilever beam with independent modal control and linear quadratic optimal control algorithms is implemented by using piezoelectric sensor and actuator in time-sharing fashion. The experimental results prove that the decay time of controlled cantilever beam reduces to 20% of the uncontrolled one.

Key words

Time-Sharing / Self-sensing Actuator / Independent Modal / Cantilever Beam

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Dong Weijie;Jia Yanli;Yang Minggang. STUDY ON ACTIVE VIBRATION CONTROL OF CANTILEVER BEAM USING PIEZOELECTRIC SELF-SENSING ACTUATOR IN TIME-SHARING FASHION[J]. Journal of Vibration and Shock, 2009, 28(10): 150-153