Integration Technology of Information Acquisition and Driving Control for Piezoelectric Micro-displacement system

According to the drive principle and strain monitoring methods of intelligent piezoelectric structure, the integration on information acquisition and driving control of piezoelectric micro-displacement system is studied. Firstly, high-precision dynamic driving power which can support the voltage from -120V to 120V is designed to meet the driven capability of piezoelectric element. Then information acquisition circuit which owns the function of real-time monitoring is designed to collect the strain signal that comes from the piezoelectric elements working process. Finally, closed-loop digital PID integral separated control algorithm is used to regulate the input of the driving power, so micro-driver controller shows closed-loop control function on the operational status of the smart piezoelectric structure, and its control precision is improved.