Computation method for attitude of aircraft fuselage based on laser tracking instrument

A laser tracker, aircraft fuselage technology, used in instruments, optical devices, measurement devices, etc.

Inactive Publication Date: 2009-02-11
ZHEJIANG UNIV +1
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  • Computation method for attitude of aircraft fuselage based on laser tracking instrument
  • Computation method for attitude of aircraft fuselage based on laser tracking instrument
  • Computation method for attitude of aircraft fuselage based on laser tracking instrument

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[0074] Example

[0075] 1) In the measurement space, 6 public observation points (2) are arranged. All public observation points can be measured by laser tracker A (1) and laser tracker B (6); the fuselage parts are placed on the POGO column ( 5) on;

[0076] 2) Use the laser tracker A (1) to measure the three-dimensional coordinates of the public observation point (2), and establish an on-site reference coordinate system according to site needs. Get the theoretical value of the public observation point (2),

[0077] 3) According to the digital model of the fuselage, the coordinate value of each measurement point (3) on the fuselage (4) is calculated as the theoretical value of the measurement point on the fuselage when the aircraft fuselage is designed to have a zero attitude.

[0078] 4) Laser tracker A (1) and laser tracker B (6) measure the common observation point (2), and obtain the measured value of the common observation point (2). According to the theoretical value and me...

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Abstract

The invention discloses an aircraft body attitude calculation method which is based on laser trackers. The attitude calculation method adopts a plurality of laser trackers to measure measurement points which are arranged on the measured aircraft body and used for expressing the aircraft attitude, and the current attitude of the aircraft part is calculated through the measurement values the theoretical values under the ideal designed attitude of the measurement points. The attitude calculation method takes into account the constraints to part of the measurement points, uses a least square error expression as a target function, utilizes a multi-target optimization model to combine the constraints and point matching, utilizes the Newton method to solve the optimization problem and obtains the aircraft body best attitude which is in line with the conditions of the constraints. The attitude calculation method adopts the advanced laser measurement technology to improve the precision of the measurement of the aircraft attitude; the attitude calculation method uses a plurality of points to carry out the attitude assessment and improves the accuracy of the attitude calculation by distributing errors to various points through the optimization function; and the attitude assessment takes into account the constraints of the measurement points and increases the flexibility of the attitude calculation by regulating the errors through the manual adjustment of weight value.

Description

technical field [0001] The invention relates to the technical field of aviation manufacturing, in particular to a method for calculating the attitude of an aircraft fuselage based on a laser tracker. Background technique [0002] As a large-scale and high-precision measurement tool, the laser tracker is playing an increasingly important role in the digital assembly of large aircraft components. The invention patent (Application No. 99109623) applied by Tsinghua University discloses a target spatial position and attitude laser measurement and tracking system composed of a target mirror group, a tracking station group, and a computer control and data acquisition and processing system. The system can realize the measurement of target space coordinates, velocity, acceleration and full attitude. However, in order to obtain the position and attitude of the target in this method, the target measurement points can only take 3 points. And it is necessary to pre-calibrate the positi...

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Application Information

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IPC IPC(8): G01B11/00
Inventor 柯映林杨卫东李江雄俞慈君王青秦龙刚毕运波贾叔仕余进海陈学良
Owner ZHEJIANG UNIV
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