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A method for constructing digital overall coordinates of high-aspect-ratio aircraft

Aspect ratio, aircraft technology, applied in aircraft assembly, electrical digital data processing, computer-aided design, etc., can solve the problems of inability to accurately establish the body coordinate system, large fitting error, etc., and achieve simple implementation of the method and high precision Effect

Active Publication Date: 2021-04-27
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for constructing digital coordinates of a high-aspect-ratio aircraft. Six reference points are selected, and the center point between the reference point on the front side of the fuselage and the rear side of the fuselage is selected. The point-connected line is rotated at a certain angle as the Y-axis, and the plane formed by the wing reference point on the Y-axis and the reference point on the front side of the fuselage is projected and then moved as the X-axis to establish a Cartesian coordinate system As the coordinate system of the body, it solves the problem that when the existing fitting method establishes the body coordinate system, the fitting error is too large due to the problem of wing droop, so that the body coordinate system cannot be accurately established.

Method used

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  • A method for constructing digital overall coordinates of high-aspect-ratio aircraft
  • A method for constructing digital overall coordinates of high-aspect-ratio aircraft

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Embodiment 1

[0034] A method for constructing digital overall machine coordinates of a high-aspect-ratio aircraft, comprising the following steps:

[0035] Step S1: Determine the 6 reference points of the fuselage through measurement, which are 2 points on the left, 2 points on the right, 3 points on the left, 3 points on the right, 14 points on the left and 14 points on the right, where the 2 points on the left and the 2 points on the right are one The left and right symmetrical points on the front side of the fuselage are grouped, the left and right 3 points are a group of left and right symmetrical points on the rear side of the fuselage, and the left and right 14 points are a group of left and right symmetrical points on the wing;

[0036] Step S2: Connect the left 2 points-right 2 points to form a straight line 2-2, connect the left 3 points-right 3 points to form a straight line 3-3, create 2' as the midpoint of the line segment connecting the left 2 points and right 2 points, create ...

Embodiment 2

[0043] A method for constructing digital overall machine coordinates of a high-aspect-ratio aircraft, comprising the following steps:

[0044] Step S1: Determine the 6 reference points of the fuselage by measuring, which are 2 points on the left, 2 points on the right, 3 points on the left, 3 points on the right, 14 points on the left and 14 points on the right. When measuring the 6 reference points of the fuselage, When the error of the reference point is greater than 0.5mm, discard the reference point. Among them, the left 2 points and right 2 points are a group of left and right symmetrical points on the front side of the fuselage, the left 3 points and right 3 points are a group of left and right symmetrical points on the rear side of the fuselage, and the left 14 points and right 14 points are a group of left and right wings symmetrical point;

[0045] When determining the 6 reference points of the fuselage, they should be measured and determined at the same reference po...

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Abstract

A method for constructing digital coordinates of a high-aspect-ratio aircraft. Six reference points are selected, and a line connecting the midpoint between the reference point on the front side of the fuselage and the reference point on the rear side of the fuselage is rotated at a certain angle. Finally, it is used as the Y axis, and the plane formed by the wing reference point on the Y axis and the front side reference point of the fuselage is projected and then moved as the X axis, and the Cartesian coordinate system is established as the coordinate system of the body to solve the problem. When the existing fitting method is used to establish the body coordinate system, the fitting error is too large due to the problem of wing droop, so that the body coordinate system cannot be accurately established.

Description

technical field [0001] The invention relates to the technical field of aircraft assembly, in particular to a method for constructing digital coordinates of a high-aspect-ratio aircraft. Background technique [0002] At present, in the process of aircraft assembly, laser radar and tracker are mostly used to measure the level of the aircraft or to calibrate related systems. The premise of the work is to establish the aircraft body coordinate system, which is fixed on the aircraft or aircraft. The three-dimensional orthogonal rectangular coordinate system of the right-hand rule is called, and the conventional measurement method for establishing the aircraft coordinate system is as follows: [0003] 1. Use direct measurement or indirect transfer station measurement to collect data on four reference points of the aircraft body and two reference points of the wing. [0004] 2. Import the nominal value of the aircraft reference point into the data processing software, and use the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15B64F5/10G06F113/28
CPCB64F5/10G06F30/15G06F2113/28
Inventor 向海军赵佩张同利景世才朱宛榆左大义赵凯
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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