Piezoelectric ceramic objective driver control method

Abstract

A piezoelectric ceramic objective driver control method includes the steps of separating a process of optimizing initial parameters of a proportion integration differentiation (PID) controller from a process of online adjustment, and configuring the optimized initial parameters to an online control algorithm to accurately control a piezoelectric ceramic objective driver quickly. In an off-line state, global optimization of the initial parameters of the PID controller is completed by a genetic algorithm in advance, the optimized initial parameters are configured into a process of online fuzzy PID control and are subjected to online feedback and real-time control, and accordingly, the piezoelectric ceramic objective driver is subjected to micro-stepping location under drive. By the piezoelectric ceramic objective driver control method, the piezoelectric ceramic objective driver can be controlled accurately and is low in output overshot, high in stability and response speed.

Description

1. Technical field [0001] The invention relates to the technical field of precision control of a piezoelectric ceramic driver, in particular to a control method for a piezoelectric ceramic objective lens driver. 2. Background technology [0002] Digital confocal microscopy technology is a technology that emerged in the 1990s based on biological optical microscopy, using optical sectioning technology and image restoration methods to obtain high-resolution sequential biological microscopic images. This technology relies on the relative stepwise micro-displacement of the objective lens and the stage driven by a micro-displacement drive element to perform sequential slice image acquisition of biological cells. Therefore, the driving quality of the micro-displacement driving element is the key to the quality of the collected image. At present, there are many kinds of micro-displacement driving components used in practice, and the piezoelectric ceramic driver has become a micro-d...

AI Technical Summary

Problems solved by technology

The early piezoelectric ceramic control methods are mostly proportional integral differential PID control and improved proportional integral differential PID closed-loop control, but due to the inability to establish an accurate model and rough parameter setting, the error is large, the overshoot is large, and the response speed is slow

This greatly limits the further improvement of the positioning accuracy of the piezoelectric ceramic objective lens driver.

Therefore, how to improve the control method of the piezoelectric ceramic objective lens has large errors, large overshoot, slow response speed and other defects, which have become important problems that we need to solve to achieve ultra-precision piezoelectric ceramic objective lens positioning.

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