High-speed wind tunnel rotation missile free rotation speed testing system

Abstract

The invention relates to a wind tunnel testing device and in particular to a high-speed wind tunnel rotation missile free rotation speed testing system which is a testing system consisting of a missile model, a magnetic piece, a balance scale, a Hall element and a signal processing system, wherein the missile model is supported in a wind tunnel through the balance scale; the missile model can be rotated freely around the axis of the balance scale; the magnetic piece is fixed at the tail part of the missile model and can be rotated together with the missile model at a same rotation speed; the Hall sensor is fixed at the tail part of the balance scale and is capable of generating a pulse signal when the magnetic piece is rotated; the signal processing system is connected with the Hall sensorthrough a data wire; and the pulse signal generated from the Hall sensor can be converted into a rotation speed of the magnetic piece, and furthermore, the rotation speed of the missile model can becalculated. The wind tunnel testing device has the characteristics of being simple in structure, relatively high in precision and low in cost, particularly a fluid field is slightly interfered by theoverall structure, then errors can be correspondingly reduced, and the properties are significant for accurate testing on rotation speeds of high-speed wind tunnel missiles.

Description

technical field [0001] The invention relates to a wind tunnel test device, in particular to a high-speed wind tunnel rotating missile free speed measurement system. technical background [0002] Because of its simplicity, efficiency and reliability, rotating missiles are widely used in the field of military weapons, and with the increasing demand for automation and intelligence of military weapons, the application of rotating missiles is also increasing. Therefore, the research on all aspects of the rotating missile is also very important. [0003] During the process from launching to hitting the target, the high-speed rotation of the missile body can increase the stability and anti-interference ability of the missile, and achieve effective strikes on the target. But at the same time, high-speed rotation brings various aerodynamic effects, which makes it more difficult to study the dynamic characteristics of rotating missiles based on the "Magulus" effect. Among them, the ...

AI Technical Summary

Problems solved by technology

Although this method solves the problem of rotation sticking in the traditional method, due to the addition of the rotation speed control system, the test simulates to a certain extent not the actual rotation speed of the missile in the flow field, which will affect the later dynamic force measurement and The flight control brings certain errors; at the same time, the introduction of the steering gear drive device also increases the test cost, the mechanical structure is more complicated, and the test operation is more cumbersome

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