A method and system for measuring the rotation angle of an aircraft

Abstract

The invention provides a method and system for measuring the rotation angle of an aircraft. The method comprises: attaching a coded mark point paster on a to-be-measured aircraft control plane; calibrating a collection device; collecting an image of a coded mark point of the coded mark point paster by using a calibrated collection device and reconstructing a three-dimensional point cloud model ofthe coded mark point, and calculating a rotation angle of the aircraft control plane; respectively collecting images of the coded mark point of the coded mark point paster at a starting point and an end point position after rotation and reconstructing three-dimensional point cloud models respectively, and establishing a target coordinate system by combining the two three-dimensional point cloud models with the rotation shaft; and in the target coordinate system, calculating included angles between all same coded mark points in the three-dimensional point cloud model at the starting point and the three-dimensional point cloud model at the end point position after rotation to obtain a rotation angle of the to-be-measured aircraft control plane. Compared with the traditional manual measurement method, the provided method enables the aircraft control plane to be protected from being damaged mechanically. The method is operated simply; and the measuring result is accurate.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to a method and system for measuring the rotation angle of an aircraft. Background technique [0002] The aircraft rudder angle measurement is an important test item in the aircraft ground assembly test. The comparison between the rotation angle of the aircraft rudder surface issued by the control command and the actual rotation angle of the rudder surface can be used to test the relationship between the aircraft electronic control system and the mechanical transmission system. Whether the matching is qualified. At present, there are mainly three measurement schemes in the field of aircraft rotation angle measurement: 1. A measurement method based on a protractor; 2. A measurement method based on an inclination sensor; 3. A measurement method based on a monocular vision system. The measurement method based on the protractor is to obtain the rotation angle of the rudder...

AI Technical Summary

Problems solved by technology

[0003] The measurement method of the protractor is cumbersome and complicated, with low precision, and it is difficult to measure when the rudder surface is non-planar

There are mainly two ways to fix the sensor on the rudder surface of the aircraft: binding and clamping. Either way, it is difficult to determine the spatial position relationship between the sensor measurement axis and the rudder surface rotation axis. At the same time, the tooling for fixing the sensor Installed on the rudder surface of the aircraft, there is a risk of damage to the rudder surface of the aircraft due to over-clamping, and the risk of tooling falling off due to under-clamping. When the rudder surface rotates, the clamping status of the tooling cannot be monitored in real time.

The measurable angle range of monocular vision is small, and the method of calculating the angle through the normal direction of the center of the feature circle has low precision

[0004] There is a lack of an accurate method and system for measuring the rotation angle of the aircraft in the prior art

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