Whole satellite thermal deformation measuring device, system and method in vacuum and variable temperature environment

Abstract

The invention provides a whole satellite thermal deformation measurement device, system and method in a vacuum and variable temperature environment, and relates to the technical field of satellite thermal deformation measurement. The whole satellite thermal deformation measuring device in a vacuum and variable temperature environment comprises a vacuum tank, and a quartz test piece and a laser displacement sensor which are arranged in the vacuum tank, the quartz test piece is suitable for being mounted on a load mounting substrate, the laser displacement sensor is mounted on the quartz test piece, and the laser displacement sensor is used for measuring the deformation of the load mounting substrate. According to the technical scheme, a vacuum environment is simulated on the ground, deviation of a laser measurement light path caused by a pressure difference effect, deviation of a Wheatstone bridge circuit balance point caused by a temperature difference and time drift are corrected, and the laser displacement sensor with use conditions in a vacuum and variable-temperature environment is debugged, the measurement precision of the laser displacement sensor is improved, and the resolution of a high-resolution satellite is effectively improved.

Description

technical field [0001] The invention relates to the technical field of satellite thermal deformation measurement, in particular to a whole-satellite thermal deformation measurement device, system and method in a vacuum and variable temperature environment. Background technique [0002] High-resolution satellites require precise design, measurement, and effective control of the deformation of the entire star structure. However, in a vacuum and variable temperature environment, it is still impossible to perform high-precision measurement of small thermal deformations within a large distance. The measurement error of the deformed laser displacement sensor is caused by, one is the pressure difference effect caused by the vacuum degree in the vacuum environment, which can cause the laser measurement optical path to shift, and the other is the Wheatstone caused by the temperature difference in the variable temperature environment. The offset and time drift of the balance point of ...

AI Technical Summary

Problems solved by technology

[0002]High-resolution satellites require precise design, measurement and effective control of the deformation of the entire star structure. High-precision measurement of small thermal deformation, which is caused by the measurement error of the laser displacement sensor used to measure thermal deformation. First, in a vacuum environment, the pressure difference effect caused by the vacuum degree can cause the laser measurement optical path to deviate. The second is that the offset of the equilibrium point of the Wheatstone bridge circuit and the time drift caused by the temperature difference in the variable temperature environment will affect the measurement of the thermal deformation of the satellite by the laser displacement sensor, thus restricting the further improvement of the resolution of the high-resolution satellite.

Images