Bionic antenna and thermal expansion based macroscopical-microcosmic driving rotary platform

Abstract

The invention relates to a bionic antenna and thermal expansion based macroscopical-microcosmic driving rotary platform, and belongs to the precision driving field. A macro piezoelectric driving unit performs clockwise macroscopic driving for a columnar rotary body through enveloping type flexible hinges and the elastic deformation of bionic wedge-shaped antennas; a microcosmic thermal expansion driving unit generates controllable thermal expansion deformation in intermittent places of the bionic wedge-shaped antennas through thermal conduction of a high-temperature ceramic heating rod so as to further drive the antennas to perform micro linear displacement to realize the microcosmic driving of the columnar rotary body; the columnar rotary body is embedded in the rotary body of a ceramic ball bearing in an interference fit manner, and a rigid planar reflective plate is mounted in the groove of the rotary body in an embedding manner; and the rigid planar reflective plate is used for a non-contact type optical displacement measurement system to perform quantitative detection on the rotary deformation of the columnar rotary body. The macroscopical-microcosmic driving rotary platform has the advantages of compact structure and capability of satisfying the requirements of the fields, such as micro-nano operation, micro-nano machining, precision optics, spaceflight and medical engineering and the like, on the micro-nano-level precision driving and positioning.

Description

technical field [0001] The invention relates to the field of precision driving, in particular to a bionic tentacles and thermal expansion-based macro-micro-driven rotating platform with nanometer-level driving precision. Through the inner-enveloping piezoelectric drive unit combined with the bionic wedge-shaped antennae with characteristic shapes, the rotation accuracy at the micro-radian level can be achieved. On this basis, combined with the controllable thermal expansion of the wedge-shaped antenna, the precise driving of the nano-radian rotation angle can be realized, that is, the macro-micro coupling driving mode of the piezoelectric rotating platform can be realized. The invention can provide technical support for many fields requiring micro-nano level precision driving, such as micro-nano operation and precision optics, and can also be used as a loading unit for precise testing of micro-scale mechanical properties of micro-components. Background technique [0002] Tr...

AI Technical Summary

Problems solved by technology

[0004] Although the rotary inertial piezoelectric actuator based on the principle of stick-slip friction drive is widely used in the field of precision drive because of its simple structure, high motion resolution, large motion stroke and fast drive speed, the mechanism wear, Factors such as inertial impact limit the realization of its extremely high positioning accuracy

In addition, under actual working conditions, since the working conditions of piezoelectric precision actuators are often affected by many factors such as narrow space size, complex electromagnetic environment, and drastic changes in operating temperature, it is difficult to achieve stable motion output with nanometer precision

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