Experimental method of capture trajectories

Abstract

The invention relates to an experimental method of capture trajectories. The experimental method includes: acquiring aerodynamic coefficient of an external store without interference of an aerial carrier and aerodynamic coefficient of the external store with interference of the aerial carrier so as to acquire interference value of the aerial carrier; acquiring real attack angle of the external store; according to the real attach angle of the external store, performing interpolation or extrapolation to acquire the aerodynamic coefficient of the external store under the real attack angle; according to the interference value of the aerial carrier and the aerodynamic coefficient of the external store under the real attack angle, acquiring motor parameters of the external store in the next motion position after delta t time, and calculating corresponding aerodynamic parameters by the aid of the motion parameters; repeating the above steps to acquire the entire drop trajectory data of the external store. With the method, added attach angle caused by normal velocity of the external store is considered, relative attitude angles of the external store and the aerial carrier can be guaranteed, and displacement and attitude angles of the external store during dropping can be accurately guaranteed.

Description

technical field [0001] The invention relates to the field of aerospace wind tunnel tests, in particular to a method for capturing trajectory experiments. Background technique [0002] The capture trajectory experiment is to support the carrier model (hereinafter referred to as the carrier) on the bracket, and the store model (hereinafter referred to as the store) is supported on the motion mechanism with six degrees of freedom through a six-component force balance . During the experiment, firstly, the carrier aircraft is placed in a certain required attitude and at a given initial position when the external storage is separated, the aerodynamic force of the external storage is measured by a six-component balance, and the aerodynamic force is combined with the mass and center of gravity of the external storage. and moments of inertia are brought into the flight mechanics equation of motion, the computer can calculate the motion parameters of the next moving position of the e...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the additional angle of attack caused by considering the normal velocity of the external store in the capture trajectory experiment, so that the relative attitude angle of the external store and the carrier aircraft changes, and finally the influence of the carrier aircraft on the external store is inaccurate, which leads to the solution of the motion equation of flight mechanics To solve the problem of inaccurate trajectories of external stores, a new experimental method for capturing trajectories is provided, which not only considers the additional angle of attack caused by the normal velocity of external stores, but also ensures the relative attitude angle of external stores and the carrier aircraft, so that the external stores can be obtained The displacement and attitude angle at each moment during the delivery process are guaranteed to be accurate