Implementing method for precision measurement of high-precision spacecraft

A precision measurement and spacecraft technology, applied in the direction of measuring devices, measuring instruments, instruments, etc., can solve the problems of multiple measurement links, complex operation, complex error factors, etc., and achieve the effect of fast calculation, high measurement accuracy and simple operation

Active Publication Date: 2018-11-06
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

The traditional electronic theodolite precision measurement method is greatly affected by human factors, the operation is more complicated, the measurement links are more, and the error factors are complicated. At present, the highest measurement accuracy can reach ±5″, which cannot meet the requirements of angular second-level payload attitude angle measurement.

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  • Implementing method for precision measurement of high-precision spacecraft
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Embodiment Construction

[0021] The implementation of the present invention will be described in detail below, and the implementation of specific steps is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given here.

[0022] 1. Payload local coordinate system definition

[0023] The local coordinate system of the payload is determined according to the right-hand rule, such as figure 1 shown, {X o Y o Z o} is the fixed reference frame of the spacecraft, {X si Y si Z si} is the i-th payload coordinate system (i=1, 2), using X si , Y si ,Z si The component values ​​of the three coordinate axes in the spacecraft reference system represent the relationship between the payload local coordinate system and the spacecraft reference coordinate system.

[0024] e.g. X for payload i si axis, the values ​​of the three axis directions in the spacecraft reference system are: X ix 、X iy 、X iz , with X b , Y ...

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Abstract

The invention provides an implementing method for precision measurement of a high-precision spacecraft. The implementing method for the precision measurement of the high-precision spacecraft comprisesthe steps of measuring angles of two orthogonal normal vectors of an effective load reference prism by using a photoelectric autocollimator to obtain mathematical description of the unit vectors of the prism in a reference coordinate system of the spacecraft; then carrying out rotation vector algorithm to obtain a vector change relationship of the effective load reference prism; and resolving theattitude angles of effective loads in the reference coordinate system and the relative posture relationship between the effective loads. The requirements for arcsecond-level precision measurement ofthe effective loads in processes of general assembly, testing and the like of the spacecraft are met mainly, and the implementing method has the advantages of high measurement precision, high applicability and the like.

Description

technical field [0001] The invention relates to the angular-second-level precision measurement of payloads in the process of spacecraft assembly and testing, and in particular to a high-precision spacecraft precision measurement method. Background technique [0002] In order to ensure the normal operation of the payload and the realization of satellite performance indicators, it is necessary to measure, adjust and control the accuracy of the payload, the measurement execution components of the attitude control system, and other system-related stand-alone machines during ground assembly and testing. Generally, regular hexahedral prisms or polyhedral prisms are set up on the structure, and the optical axis of the prisms is used to characterize the physical characteristics of the load under test or a stand-alone machine. The measurement of installation and assembly accuracy is mainly carried out by establishing a station with electronic theodolites, which requires two or more th...

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Application Information

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IPC IPC(8): G01C15/00
CPCG01C15/00
Inventor 庞亚飞赵旭枫林德贵杜冬
Owner SHANGHAI SATELLITE ENG INST
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