Monocular video measurement method for external store separating locus wind tunnel test

Abstract

The invention relates to the technical field of external store separating wind tunnel tests, and especially relates to a monocular video measurement method for an external store separating locus wind tunnel test. The method overcomes the difficulties of marking point recognition and matching through the circulating coding of marking points when an external store wind tunnel model rotates. The method employs the principle of relative motion, respectively takes a wind tunnel test segment and the external store wind tunnel model as reference objects, solves the position and posture of a camera, further obtains the movement locus of the external store wind tunnel model, achieves the monocular video measurement of an external store separating locus, avoids a stereo matching difficulty of binocular video measurement, and is higher in flexibility and practicality.

Description

technical field [0001] The invention relates to the technical field of wind tunnel tests for separation of external objects, in particular to a monocular video measurement method for wind tunnel tests of separation tracks of external objects. Background technique [0002] After the external storage objects (bombs, auxiliary fuel tanks, missiles, etc.) are dropped from the carrier aircraft, they are in the interference flow field of the carrier aircraft at the initial stage of leaving the carrier aircraft. The characteristics of the interference flow field are related to the shape, flight speed, flight altitude, The attitude of the carrier aircraft, the shape of the external store and its installation position and attitude are related to many factors, and it is difficult to use theoretical methods to predict the flight trajectory of the external store in the disturbed flow field; especially under the condition of high Mach number, due to the influence of compressibility and T...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is: no additional requirements for the design of the wind tunnel model of the external store in the separation track test (no hole wiring, no damage to the aerodynamic shape, no change in structural strength and stiffness, no increase in design difficulty and cost) In the case of external objects, it solves the problem of identification and matching of marker points when the external object wind tunnel model moves in six degrees of freedom; and in the vibration environment of the temporary wind tunnel, a single camera is used to realize the external object separation wind tunnel test track Accurate measurement, thus avoiding the complex problems of image stereo matching and data processing in binocular video measurement, providing a monocular video measurement method for external store separation track wind tunnel test, solving external store wind To solve the problem of marker point recognition and matching when the tunnel model rolls, by using the principle of relative motion, the position and attitude of the camera are solved with the wind tunnel test section and the wind tunnel model of the external storage as reference objects, and then the wind tunnel model of the external storage is obtained. Motion trajectory, realizing the monocular video measurement of the separation trajectory of the external wind tunnel model

Images