Pose uncertainty evaluation method

Abstract

The invention discloses a pose uncertainty evaluation method. The method comprises the following steps of 1) giving a pose uncertainty definition, geometric representation, algebra representation and physical significance; 2) establishing an analysis relationship between pose uncertainty and position uncertainty of a measurement target point according to an analysis algorithm for pose calculation, and determining an analysis algorithm for the pose uncertainty; 3) analyzing a pose uncertainty source and dividing the pose uncertainty source into two major types including target point measurement uncertainty and target point actual position fluctuation uncertainty; 4) for pose measurement and uncertainty evaluation demands, determining a measurement system type selection scheme and a sampling policy, and collecting target point measurement data samples; 5) analyzing the target point measurement data samples by adopting a principal component analysis method, and separating out the target point position fluctuation uncertainty and the target point measurement uncertainty; and 6) according to the analysis algorithm for the pose uncertainty, calculating the pose uncertainty by utilizing the target point position fluctuation uncertainty.

Description

technical field [0001] The invention relates to a component pose uncertainty evaluation method aimed at the assembly process of large components. Background technique [0002] In the fields of complex product manufacturing such as aviation, aerospace, and ships, in order to complete product assembly and ensure quality, it is necessary to accurately adjust the pose of large-scale components such as aircraft fuselage, satellite cabin, and hull segments; by measuring the structure of large-scale components The coordinates of the feature points and the fitting to obtain the measured pose of the component are the prerequisites for realizing the pose adjustment of large-scale components. In the traditional docking assembly process of large components, several key feature points are usually set on the component structure, these feature points are measured, and the offset form and adjustment direction of the component attitude are determined by comparing their relative positions. T...

AI Technical Summary

Problems solved by technology

[0005] At present, there are no relevant research results on the uncertainty of pose; the present invention researches and implements a method for evaluating the uncertainty of pose

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