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This paper investigates vibration control of plate through Electro-Magnetic Constrained Layer Damping (EMCLD) which consists of electromagnet layer, permanent magnet layer and viscoelastic damping layer. The equivalent current assumption is adopted to model the magnetic control force produced by EMCLD. The governing equations of the plate system are obtained using Hamilton's Principle. A simulation and an experiment on vibration control of a cantilever plate are done under the velocity proportional feedback to demonstrate the active control capability of EMCLD. Both the results of simulation and experiment show EMCLD is an effective means for active vibration control. [ABSTRACT FROM AUTHOR]

A bilateral piezoelectric stack actuator (BPSA) is introduced, and its actuated property is also analyzed. Usually, a piezoelectric stack can only undertake significant compressive loads but cannot tolerate tension, while this new actuator is able to generate obvious bilateral actuated outputs. The actuated principle of the new actuator is analyzed firstly. The linear and nonlinear models are also built up. The latter is to analyze the piezoelectric hysteresis based on the classical Preisach model. Moreover, the effect of the preload on the actuator is considered. By comparison with the experiment results, the Preisach model is valid for the present actuator. [ABSTRACT FROM AUTHOR]