Optimization analysis of piezoelectric actuator based on energy transfer

Based on energy transfer theory, the power flow method is used to optimize the piezoelectric actuator to improve its output performance. First, the mode analysis of the piezoelectric actuator is performed, and the actuator is discretized according to the mode nodes of the operational mode. On the basis of the Norton’s equivalent circuit, the equivalent mechanical network of the actuator is established, and the expression of power flow is imported to the mass block of driving foot. Second, on the basis of the actuator power flow expression, simulation analysis is conducted to obtain the influence of actuator parameters on the power flow amplitude for optimizing the driver parameters. Finally, a test platform is built to compare the improved piezoelectric actuator with the original one. Results show that the output force and power of the improved piezoelectric actuator have increased by 8.3% and 22%, respectively, to verify the effectiveness of the optimization method.