Research On High-Precision Dynamic Piezoelectric Ceramic Driving Power

The piezoelectric smart structures have been widely used in the fields of precision optics, aeronautics and aerospace, robot, and so on. Because of it's advantages, such as small size, high thrust, high accuracy, high-frequency response, and etc. The performance of the piezoelectric driving power determines the characteristic of the piezoelectric smart structures. But the precision and dynamic performance of the domestic driving powers are poor, which have limited the application of the piezoelectric smart structures.Based on the above background, a design scheme of the high-precision dynamic driving power using the high-voltage operational amplifier is proposed in this dissertation, which can be widely used in driving capacitive loads. And aslo, the designed driving power is developed and tested, which is based upon the theoretical analysis and simulation results of it's performance parameters.First the driving powers based on different principles are proposed under the same condition in this dissertation, which include current-controlled driving power, voltage following style driving power and the driving power using the high-voltage operational amplifier. The performance parameters are determined through the simulation using Multisim10, which include frequency response, linearity, error and etc.Next, the design scheme of the high-precision dynamic driving power is proposed. The frequency response, linearity and stability are verified through the theoretical analysis and simulation results, which are also used to determine the parameters of the electric circuit. Finally, based on the theoretical research and simulation analysis, the driving power is developed and tested. Using the Ultiboard10 and ProtelDXP, the printed circuit board of the driving power is designed. And the performance of the driving power is tested in experiments with capacitances and piezoelectric element. The testing results indicate that it can not only deliver the dynamic power with the output voltage of 240V and output current of 140mA, but also possesses good static performance, for example, the linearity is better than 99.5%, and the error voltage is less than 1V.The theoretical research and simulation analysis provides a novel method for developing the driving powers of the piezoelectric smart structures. The development of the power-supply system and experiments are the foundation for our future works.