Active control experimental based on wavelet analysis

Traditional method of structural vibration control through stiffen the components, decoupling the harmonic resonance system, vibration and damping isolation, or dynamic vibration absorb, all rely structure damping consumption the energy, the control effect is limited because the constraints of materials performance. Piezoelectric smart structure with advantages such as fast response, arrangement flexible, not only can be sensors, but also can be actuators, so it play a positive and effective role in vibration control, and gain more and more attention of scientific researchers and designers. The active control becoming the main means in the structure vibration control, one core of active control is the control law between input and output, because its designs based on the reduced-order model, in addition to meet the performance of dynamic stability and dynamic response, but also has good robustness, which is not sensitive for the closed-loop system of the control parameters and controlled targets. This paper based on a active control tests, using wavelet scaling function approximation with the ability to filter out high frequency components, built a piezoelectric actuator control dynamic model by displacement and velocity feedback signal, which solution the instability problem caused by the overflow observation and control overflow coupling, and it be in the actual application and verify in the experimental.