Piezoelectric hydraulic high-precision positioning platform device

Abstract

The invention provides a piezoelectric hydraulic high-precision positioning platform device. The piezoelectric hydraulic high-precision positioning platform device comprises a top platform assembly and a bottom platform. The top platform assembly is arranged at the top of the piezoelectric hydraulic high-precision positioning platform device; the top platform assembly comprises a top platform, a bearing seat, a bearing and a connecting shaft; the top platform is of an annular plate-shaped structure. The bottom of the top platform is provided with six same curved-edge rectangular sinking grooves. Every two adjacent curved-edge rectangular sinking grooves form a group; the curved-edge rectangular sinking grooves are uniformly distributed in the bottom surface of the top platform; and two through holes are symmetrically formed in the bottom of the curved-edge rectangular sinking groove. The structure is simple and compact, and the actuator driven by the piezoelectric pump is applied to an on-orbit satellite camera high-precision positioning platform and aims at complex environments such as space microgravity and radiation.

Description

technical field [0001] The invention relates to the field of precision machinery, in particular to a piezoelectric hydraulic high-precision positioning platform device. In particular, it relates to a piezoelectric pump-hydraulic high-precision positioning platform for on-orbit satellites. Background technique [0002] Optical remote sensing satellites are artificial satellites used as remote sensing platforms in outer space. They are equipped with optical loads to provide high-quality earth image information. The earth satisfies the needs of socio-economic and technological development, and has become a hot spot in the field of aerospace development in recent years. [0003] The normal work of the optical load requires an ultrastatic working environment, and it is difficult to achieve the accuracy and stability of the platform control by simply relying on the control algorithm. Therefore, a stable high-precision control platform is the premise guarantee for the optical pay...

AI Technical Summary

Problems solved by technology

However, due to the large mass of the satellite, the attitude adjustment is very slow, it is difficult to realize the rapid pointing maneuver control of the payload, and at the same time consumes a lot of energy; secondly, the satellite attitude maneuvering is easy to cause the optical load to shake, which seriously affects the pointing stability of the payload optical axis, resulting in its imaging vague

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