一种基于信息熵的机身筒段调姿弯曲变形的监测方法

By using an information entropy-based monitoring method, the three-dimensional coordinates of the aircraft fuselage section are measured using a laser tracker. The bending deformation index and pass rate are calculated, and information entropy and weights are established. This solves the problems of neglecting the relationship between indicators and low data processing efficiency in traditional methods, and achieves a more comprehensive attitude adjustment quality evaluation and process optimization.

CN121557889BActive Publication Date: 2026-07-17AVIC XIAN AIRCRAFT IND GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AVIC XIAN AIRCRAFT IND GRP CO LTD
Filing Date
2025-12-03
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional methods for evaluating the attitude adjustment quality of aircraft fuselage sections focus only on deviations of individual indicators, neglecting the relationships between indicators. This results in low data processing efficiency, difficulty in identifying the causes of deviations under the combined effect of multiple factors, and leads to the neglect of potential problems and difficulty in identifying process issues.

Method used

An information entropy-based monitoring method is adopted. The three-dimensional coordinates of the aircraft's horizontal measurement points are measured by a laser tracker. The bending deformation index and pass rate are calculated, information entropy and weights are established, and statistical methods are used to identify attitude adjustment quality problems and optimize the process.

Benefits of technology

It provides a comprehensive evaluation method to identify systematic deviations, improve data processing efficiency and accuracy, help locate key process steps, and provide a basis for production optimization.

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Abstract

本申请提供一种基于信息熵的机身筒段调姿弯曲变形的监测方法,包括:步骤一,测量飞机所有水平测量点三维空间坐标;步骤二,计算两个水平测量点之间距离,作为弯曲变形实测指标,并按照飞机设计要求计算弯曲变形理论指标T以及公差下偏差LSL和上偏差USL;步骤三,根据、T以及LSL和USL,建立单尺寸合格率指标,并建立整机合格率指标;步骤四,将测量数据各弯曲变形指标进行标准化处理,得到标准化数据;步骤五,计算j指标Xj下第i架飞机数据占该指标的比重Pij;步骤六,根据比重Pij,建立每一个弯曲变形指标的信息熵Ej;步骤七,计算每一个变形指标的权重Wj;步骤八,建立调姿质量监测指标;步骤九,根据调姿质量监测指标,进行工艺优化。
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