Micro-impulse torsion device for differential measurement of laser interferometry

Abstract

The invention discloses a micro-impulse torsion device for differential measurement of laser interferometry, which solves the problems of low precision of torsion, defocus, and translation caused by impact force loading. Including the torsion part and the laser interference part; the torsion part includes a vertical frame, an upper cross bar and a lower cross bar, an oblique beam, a lifting adjustment mechanism and a translation adjustment mechanism; between the upper cross bar and the lower cross bar of the shaped frame The pendulum wire is suspended between the wires, and the middle part of the wire is fixed with a pendulum beam perpendicular to the wire. The vertical rod is fixed on the upper end of the inclined beam through the lifting adjustment mechanism. The lower end of the inclined beam is installed on the translation adjustment mechanism, and the translation adjustment mechanism is fixed on the test bench. ; The laser interference part includes beam expanders, reflectors, beam splitters, He-Ne lasers for generating interference beams, photodetectors and signal processing terminals. The measuring range of the device system of the invention is reasonable, the measurement accuracy is higher, the measurement process period is short, and the high-precision laser micro-pulse measurement is realized.

Description

technical field [0001] The invention belongs to the technical field of space propulsion, and relates to a micro-impulse measuring device for laser micro-propelling. Background technique [0002] Laser micro-propulsion uses laser as the power to ablate the working medium to generate impulse, and realize the attitude and orbit control of the spacecraft. The impulse measurement of laser micro-propulsion is crucial to the study of laser micro-propulsion technology. The impulse range generated by laser micro-propulsion is usually in the range of 10 -6 ~10 -4 Between the N·s level, the impulse measurement requires high precision, fast response, and large range (across three orders of magnitude), and the measuring device needs to be specially designed to meet the requirements. [0003] At present, among the micro-impulse test methods publicly reported at home and abroad, the most concerned is the torsion measurement method. The torsion pendulum was originally a device for measu...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a laser interferometry differential measurement micro-impulse torsion device to solve the problems of low precision, defocus, and translational motion caused by impact loading in the existing torsion

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