Actuation platform and actuation method with micro-swing suppression and pointing adjustment functions

Abstract

An actuating platform and an actuating method with the functions of micro-swing suppression and pointing adjustment, the platform is composed of an actuating rod, a lower base, an upper platform, a flexible hinge support, a two-stage diamond-shaped displacement amplifying mechanism, a piezoelectric stack, and an eddy current displacement sensor ; Among them, the lower base and the upper platform are supported and connected by flexible hinges; the lower ends of the actuating rods are fixed on the lower base and are distributed diagonally in pairs; the upper ends of the actuating rods and the upper platform are connected by flexible hinges; the actuating rods A piezoelectric driver composed of a piezoelectric stack and a secondary rhombus displacement amplifying mechanism is connected in series; an eddy current displacement sensor is arranged next to the actuating rod; the displacement signal of the upper platform is collected by the eddy current displacement sensor, and the The piezoelectric driver composed of displacement amplification mechanism drives the actuating rod to output displacement along the axial direction, and the piezoelectric drivers arranged diagonally act together to push the upper platform to rotate in the diagonal direction, which can achieve a high two-dimensional pointing angle. Active control of precision adjustment and micro-swing of pointing angle.

Description

technical field [0001] The invention relates to the technical field of micro-swing suppression and pointing adjustment functions, in particular to an actuation platform and an actuation method with micro-swing suppression and pointing adjustment functions. Background technique [0002] With the rapid development of satellite communication and ground imaging technology, higher and higher requirements are put forward for the pointing accuracy and stability of satellites. The traditional pointing adjustment control adopts the magnetic motor drive control, and the pointing adjustment of the motor drive control is generally composed of a motor, a motor controller, and an adjustment object. Pointing adjustment by motor drive control has the following defects: 1. The weight and volume of the motor drive equipment are large, and the power consumption is high; 2. The pointing adjustment accuracy of motor drive control is not high; During the process, the slight swing of the pointing...

AI Technical Summary

Problems solved by technology

Pointing adjustment by motor drive control has the following defects: 1. The weight and volume of the motor drive equipment are large, and the power consumption is high; 2. The pointing adjustment accuracy of motor drive control is not high; The slight swing of the pointing angle cannot be suppressed during the process, and the stability of the pointing adjustment is low

When functions such as lightweight structure, miniaturization, low power consumption, high-precision pointing adjustment, and micro-vibration suppression of pointing angle are required, traditional motor drive control is difficult to meet the above conditions

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