Transfer station precision optimization method for an aircraft assembly large-size multi-station measurement field

Abstract

The invention discloses a transfer station precision optimization method for an aircraft assembly large-size multi-station measurement field. The method is characterized in that on the basis of TB/ERSpoint and other transfer station reference points which are commonly used for aircraft assembly; A temporary transfer station enhancement point without a theoretical value is introduced, and two or more measurement stations are used for measuring the transfer station enhancement point at the same time, so that the transfer station adjustment constraint between the different measurement stations is increased, and the transfer station parameter variance-of the measurement stations towards the assembly global station is reduced. The covariance matrix improves the transfer station precision. Themethod is characterized in that 1) optimization of the transfer station precision is realized by increasing the arrangement number of transfer station reference points such as TB/ERS points, and the arrangement and later maintenance costs are greatly reduced due to the fact that transfer station enhancement points do not have theoretical values; 2) the transfer station enhancement point can be temporarily and flexibly arranged according to the measurement precision requirement difference of different areas of the to-be-measured component and the field measurement openness condition, so that the use is convenient;

Description

technical field [0001] The invention relates to the technical field of aircraft assembly measurement, in particular to a method for improving the accuracy of transfer station parameters during large-scale multi-station measurement, and specifically to a transfer station accuracy optimization method for large-scale multi-station measurement fields for aircraft assembly . Background technique [0002] Due to the large structural size of aircraft, ships and other products, it is usually necessary to set up multiple stations for complete product measurement during product inspection and assembly process online measurement. First, it is necessary to convert the measurement coordinate system of each station to the global coordinate system. The previous transfer station method mainly relied on the pre-arranged TB / ERS points and other reference points, the layout and maintenance costs were high, and there were often situations such as reference point occlusion and wear, which caused...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the existing transfer station measurement method with TB / ERS point as the reference point, which has high layout and maintenance costs, and there are often situations such as reference point occlusion and wear, which lead to a large increase in transfer station errors and directly affect assembly To solve the problem of measurement accuracy, a method for optimizing the transfer station accuracy of large-scale multi-station measurement field for aircraft assembly is provided, which can effectively overcome the shortcomings of the existing TB / ERS point transfer method and improve the transfer station accuracy during multi-station measurement. precision

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