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Method for resisting creep of stack type piezoelectric ceramic driver through two-way small peak voltage

A peak voltage, piezoelectric ceramic technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the displacement error, suppress the creep effect is not obvious, can not Meet the problems of precise positioning and achieve the effect of fast, accurate and precise positioning

Inactive Publication Date: 2015-05-13
TAISHAN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above two methods have a certain effect in suppressing creep, the process is complicated, the effect of suppressing creep is not obvious, and the displacement error after suppression still cannot meet the needs of precise positioning.

Method used

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  • Method for resisting creep of stack type piezoelectric ceramic driver through two-way small peak voltage
  • Method for resisting creep of stack type piezoelectric ceramic driver through two-way small peak voltage
  • Method for resisting creep of stack type piezoelectric ceramic driver through two-way small peak voltage

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the examples, and the following examples are intended to illustrate the present invention rather than further limit the present invention. The steps are:

[0020] see Figure 1-Figure 2 , the driving voltage of the stacked piezoelectric ceramic driver is set to a step voltage with a rising section and a falling section. During the rising section of the step voltage, when the next control time after the step voltage is applied, the amplitude is A spike , the duration is T d At this time, the amplitude of the peak voltage is positive, and the amplitude of the applied voltage is increased; when the step voltage is falling, apply a peak voltage with the same amplitude value, but the opposite direction and the same duration, and the peak voltage at this time Decrease the magnitude of the step voltage.

[0021] The following table shows that the value of the peak voltage has a multiple relationship ...

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Abstract

The invention discloses a method for resisting creep of a stack type piezoelectric ceramic driver through two-way small peak voltage. The method is characterized in that the two-way small-amplitude peak voltage method is added; the peak voltage which has the same variation direction with plateau voltage, amplitude value of Aspike and duration of Td is added in the next control time at the beginning of the plateau voltage. According to the method, the two-way small-amplitude peak voltage method is added, the creep rate of the system is reduced to be zero, and thus the demand on accurate positioning of the stack type piezoelectric ceramic driver can be met, and the nano positioning under large plateau voltage difference and large interval can be achieved.

Description

1. Technical field [0001] The invention belongs to the field of piezoelectric ceramic drivers, in particular to a method for anti-creep of stacked piezoelectric ceramic drivers using bidirectional small peak voltages. 2. Background Technology [0002] Stacked piezoelectric ceramic actuators have the advantages of high displacement resolution, small size, fast response, and large output force. They are widely used in micro- and nanoscale micro-displacement operations. Its displacement error increases, seriously affecting its positioning accuracy. [0003] The creep characteristic is that when the voltage value applied to the piezoelectric ceramic driver no longer changes, the displacement value is not stable at a fixed value, but changes slowly with time, and reaches a stable value after a certain period of time. This is because there is friction between the lattices inside the dielectric, and the 90-degree electric domains in the crystal affect each other when they start to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00
Inventor 赵学良王清张兆臣
Owner TAISHAN MEDICAL UNIV