Smart Structure Vibration Control Using a New Bending Type of Piezoelectric Stack Actuator

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (9) : 130-138,.

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Smart Structure Vibration Control Using a New Bending Type of Piezoelectric Stack Actuator

Yang Zhichun，Wang Wei，Gu Yingsong, Li bin

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Abstract

A new (pi) shape piezoelectric stack actuator (PISA) is designed and applied to the vibration control of a cantilevered beam. This new actuator consists of a piezoelectric stack and a shape metal pedestal. They are assembled together by a screw which provides the preload needed by the piezoelectric stack. The pedestal is designed to act as an external lever which will generate and transfer actuating moment to the structure. The pedestal makes PISA be a bending type actuator. Its bottom provides a flat bonding surface for PISA in vibration control applications. The actuation moment of PISA is derived and then it is used in a vibration control system for a cantilevered beam. Positive position feedback (PPF) control and neural network predictive (NNP) control strategies are adopted to control the first bending mode vibration of the beam. Simulation results demonstrate that, the amplitude of the first bending mode of the cantilever beam can be suppressed by 92% using NNP control strategy, while using PPF control strategy the amplitude can be reduced by about 57%. The results demonstrate that the proposed PISA can serve as a high efficiency piezoelectric actuator in structure vibration control applications.

Key words

(pi) shape piezoelectric stack actuator (PISA) / Positive position feedback (PPF) control / Neural network predictive（NNP）control / cantilevered beam

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Yang Zhichun;Wang Wei;Gu Yingsong;Li bin. Smart Structure Vibration Control Using a New Bending Type of Piezoelectric Stack Actuator[J]. Journal of Vibration and Shock, 2009, 28(9): 130-138,