Large deflection angle piezoelectric two-dimensional pointing mechanism with decoupling function and its driving method

Abstract

The invention provides a large-deflection-angle piezoelectric two-dimensional directional mechanism with a decoupling function and an action method. The directional mechanism comprises a base and a sleeve tube fixed to the base through four lower end bolts. The cavity of the sleeve tube is provided with a four piezoelectric stacks which are equipped with arc caps, wherein two piezoelectric stacks are arranged along an x axis, the other two piezoelectric stacks are arranged along a y axis, and the other end of the sleeve tube is connected to a decoupling platform through four upper end bolts. A platform, four decoupling flexible hinges and four lever amplification mechanisms are designed on the decoupling platform in an integrated way, wherein each of the decoupling flexible hinges is formed by two rectangular flexible hinges in a vertical orthogonal arrangement, a lower end rectangular flexible hinge is connected to a lever amplification mechanism, and through pretightening force can be provided for the four piezoelectric stacks and the arc caps through pretightening the four upper end bolts and the four lower end bolts. The invention also provides a method for driving the platform to deflect around the x axis and the y axis, the structure is compact, key parts are processed by using slow speed wire cutting process, the precision is high, and the assembly is simple.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric driving mechanisms, and in particular relates to a large-deflection-angle piezoelectric two-dimensional pointing mechanism with a decoupling function and a driving method. Background technique [0002] With the development of aerospace technology, in order to realize a new generation of high-quality inter-satellite laser communication and satellite-to-ground microwave communication, there is an urgent need for a two-dimensional pointing mechanism pair with a large declination range, high declination resolution and high reliability. The laser light path and space antenna pointing can be adjusted in a large range, quickly and with high precision. Although the traditional piezoelectric two-dimensional pointing mechanism has high deflection angle resolution, it has the following two disadvantages: First, the traditional mechanism has serious mechanical coupling between the two adjustment dimensi...

AI Technical Summary

Problems solved by technology

Although the traditional piezoelectric two-dimensional pointing mechanism has high deflection angle resolution, it has the following two disadvantages: First, the traditional mechanism has serious mechanical coupling between the two adjustment dimensions, which makes the angle adjustment of the two dimensions Interaction, it is difficult to obtain high-precision control capability; second, limited by the small displacement output characteristics of piezoelectric materials, the deflection angle adjustment range of traditional mechanisms is usually small

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