A three-degree-of-freedom angular motion simulation test device for rotating bullets and arrows

Abstract

The invention discloses a spinning projectile three-freedom angular motion simulating testing device which comprises a testing model, a main-stage rotating mechanism, a secondary-stage rotating mechanism and a model supporting mechanism. The front end of the main-stage rotating mechanism is a rotatable fan-shaped surface. The secondary-stage rotating mechanism is mounted on the fan-shaped surface,and furthermore the position of the secondary-stage rotating mechanism can be adjusted on the fan-shaped surface, thereby realizing a precession angle extension. The model supporting mechanism is mounted on the secondary-stage rotating mechanism. The testing model is mounted on the model supporting mechanism. The testing model can freely rotate relative to the model supporting mechanism. The secondary rotating mechanism drives the model supporting mechanism to rotate. The spinning projectile three-freedom angular motion simulating testing device realizes high structure stability and simulatesthe three-freedom angular motion of the spinning projectile, and furthermore measures unsteady aerodynamic power in a movement process. The spinning projectile three-freedom angular motion simulatingtesting device further performs functions of realizing independent motion of the model in three directions, measuring angles in the three directions and measuring the unsteady aerodynamic power of the model.

Description

technical field [0001] The invention relates to the technical field of aeronautical aerodynamic wind tunnel tests, in particular to a three-degree-of-freedom angular motion simulation test device for a rotating missile. Background technique [0002] The angular motion of the rotating rocket in flight is presented in three forms: the spin motion around the axis of the projectile itself, the rotational motion around the velocity vector, that is, precession, and the rotational motion around a certain axis in space, that is, nutation. In actual flight, it can be a single angular motion, or a combination of two-degree-of-freedom angular motion or a compound motion of three-degree-of-freedom angular motion. In the wind tunnel test, simulating the angular motion of the rotating projectile and measuring the unsteady aerodynamic force during its movement is the main method for the study of the dynamic aerodynamic characteristics of the rotating projectile. Therefore, it is necessary...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the three-degree-of-freedom angular movement of the rotating missile cannot be simulated under the existing wind tunnel test technology capability, and provides a three-degree-of-freedom angular motion simulation test device for the rotating missile, which can be used in the wind tunnel Realize the three-degree-of-freedom angular motion simulation of the rotating missile model, and can also realize two or a single degree of freedom movement separately, and measure the angle change value and the unsteady aerodynamic force acting on the rotating missile model in real time during the movement

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