Piezoelectric ceramic driving power supply with hysteresis compensation function

Abstract

The invention relates to a piezoelectric ceramic driving power supply with a hysteresis compensation function, which comprises a DC voltage stabilization module, a hysteresis compensation module, a power amplification module and a displacement detection module, wherein the DC voltage stabilization module provides DC voltage for the power amplification module and the hysteresis compensation module; the hysteresis compensation module is used for compensating hysteresis nonlinearity of the piezoelectric ceramic, a switch is arranged between the input end and the output end of the hysteresis compensation module, the switch is closed in the case of first-time use or when a piezoelectric ceramic chip of a different type is replaced, and the hysteresis compensation module is short-circuited; the power amplification module carries out voltage and power amplification on output signals of the hysteresis compensation module; and the displacement detection module is started only in the case of first-time measurement or a piezoelectric ceramic chip of a different type is replaced and is used for measuring response displacement and storing the response displacement to the hysteresis compensation module. The hysteresis compensation module is introduced, the influence on the control precision by a hysteresis phenomenon can be greatly reduced, and the structure is simple, and the stability is high.

Description

technical field [0001] The invention relates to piezoelectric ceramic driving power technology, in particular to a piezoelectric ceramic driving power with hysteresis compensation function. Background technique [0002] Piezoelectric ceramics work on the principle of the inverse piezoelectric effect, and have the advantages of nanoscale resolution, fast response, low noise, less heat generation, and small size. Wide application prospects. [0003] In ultra-precise positioning, it is necessary to achieve micron-level or even nano-level positioning accuracy. However, due to the hysteresis of the piezoelectric actuator itself, there is a nonlinear relationship between the input voltage and the output displacement, which greatly affects the positioning and control accuracy. The current piezoelectric ceramic driving power directly amplifies the input voltage linearly, which cannot solve the influence of the hysteresis phenomenon of piezoelectric ceramics on the control accuracy....

AI Technical Summary

Problems solved by technology

[0003] In ultra-precise positioning, it is necessary to achieve micron-level or even nano-level positioning accuracy, but due to the hysteresis of the piezoelectric actuator itself, there is a nonlinear relationship between the input voltage and the output displacement, which greatly affects the positioning and control accuracy

The current piezoelectric ceramic drive power directly amplifies the input voltage linearly, which cannot solve the influence of piezoelectric ceramic hysteresis on control accuracy.

Images