Research On Active Vibration Control System Integration Based On DSP

Active vibration control with piezoelectric materials is an important part of research in smart material and structure. It is broadly used in the field of aeronautics and astronautics.This paper describes an active vibration control system aimed to driving piezoelectric or piezoelectric composites actuators. Due to the heavy mass, large size and low energy efficiency of traditional power system, we try to find a solution that allows a reduction in size, weight and high power loss. The new system for driving piezoelectric actuators comprises a piezoelectric transformer, a switch amplifier and DSP. The system has significant advantages in environments requiring high integration, low weight, and low electromagnetic interferences operated with batteries.The active vibration control aimed at a cantilever beam with piezoelectric sensors and actuators was studied, and the principle and the method of the sine Pulse Width Modulation technology were analyzed. The following conclusions were drawn from:Firstly, the working principle of piezoelectric transformers (PT) and switch amplifiers are reaseached and their properties are tested.Secondly, the central processing unit (CPU) of the TMS320C2812,Peripheral Interrupts,Analog-to-Digital Converter (ADC) and Event Manager (EV) modual are reseached. A real-time data operation system based on DSP platform is designed. Single and multi-channel real-time data acquisition experiment.is achieved.Thirdly, the principle in realization of D/A using on-chip PWM channel in the TMS320F2812-based system is analyzed.Some methods of SPWM, specially, nonsymmetry regular sampling are studied. AVC system based on PWM technology is realized.Finally, Active vibration control experiment is performed about the first vibration mode of cantilever beam. The experiment results show that the vibration of the cantilever beam can be effectively suppressed by using the adaptive control method.