Micro-deformation Monitoring Of Spacecraft Based On The Technique Of Optoelectronic Autocollimator

Micro-deformation monitoring has been a sophisticated measurement technology with the development of rigid manufacturing,installation and testing in recent years,which mainly carries on the long-term continuous surveying of the small deformation of spacecraft or industrial products.We could analyze the law and trend of deformation by processing the monitoring data.Therefor,Micro-deformation monitoring has a great significance on inversing the design parameters of spacecraft and ensuring the safety of objects and simulating of special environment.In the field of aerospace,the existing measurement methods cannot meet the requirements of attitude deformation monitoring,so,inorder to make up for the shortcoming of existing measurement techniques,this paper contructed the spacecraft attitude microdeformation monitoring system based on photoelectric self-collimation technology.This paper mainly studied and solved the following problems:1.For the micro-deformation monitoring of spacecraft attitude,this paper presented a new method of micro-deformation monitoring using photoelectric autocollimator,and set up a microdeformation monitoring platform,which provides new technology for high-precision attitude measurement of spacecraft;2.Proposed the method that establishing the spatial coordinate system of photoelectric autocollimator,and deduced the conversion model between plane coordinate system and spatial coordinate system;3.Proposed the calibration method that calibrating the spatial coordinate system of the photoelectric autocollimator based on the theodolite in order to realizes the fusion of two photoelectric autocollimators collimated measurement datas,which also provided theoretical basis for joint measurement that combining the electro-collimator with other sensors;4.Deduced the planar fitting TLS algorithm which has high precision of plane fitting,and the algorithm also provided precise guarantee for the measurement of spacecraft attitude;5.We deduced the spacecraft attitude converdion model,and carried out the detailed process design and experimental analysis;6.Developed the software which could control photoelectric autocollimator and preprocess the monitoring data,the software also realized photoelectric self-collimating data acquisition,storage,graphic display,input and output,gross elimination and filtering.