Model support and coupled roll drive device for unsteady dynamometric wind tunnel tests

Abstract

The invention discloses a model support and coupling rolling drive device for unsteady force measurement wind tunnel test. The device is a T-shaped rod structure, including a horizontally placed tail rod. A mandrel is installed on the central axis of the tail rod. The front end of the mandrel extends out of the tail rod and is fixedly connected to the balance. The balance is fixedly connected to the model; The rear end protrudes from the tail rod, and a vertical rolling drive servo motor is fixed above the rear end of the mandrel, and a vertical torque compensation servo motor is symmetrically fixed below the rear end of the mandrel, and the rolling drive servo motor drives the mandrel to drive the balance Perform rolling motion with the model, the torque compensation servo motor outputs the rolling torque in the same direction to compensate the energy loss of the rolling drive servo motor; the rear end of the mandrel wraps the rear section of the pole, and the tail pole is inserted into the rear section of the pole and connected with the pole The rear section is fixedly connected. The device has better model adaptability and higher accuracy of roll drive angle.

Description

technical field [0001] The invention belongs to the technical field of high-speed wind tunnel tests, and in particular relates to a model support and coupling rolling drive device for unsteady force measurement wind tunnel tests. Background technique [0002] The rolling degree of freedom of the balance strut in the model support device of the traditional high-speed wind tunnel force test is in a locked state, which cannot realize the free rolling motion of the test model. Therefore, the balance cannot measure the unsteady aerodynamic force and moment of the model. The support device also cannot simulate the dynamic hysteresis effect of aerodynamic force and moment under the condition of maneuvering motion of the aircraft. [0003] The free-rolling test device usually used in the dynamic high-speed wind tunnel test releases the degree of freedom of the model's roll, but the free-rolling test cannot be realized because the moving parts such as bearings in the free-rolling tes...

AI Technical Summary

Problems solved by technology

[0002] The rolling degree of freedom of the balance strut in the model support device of the traditional high-speed wind tunnel force test is in a locked state, which cannot realize the free rolling motion of the test model. Therefore, the balance cannot measure the unsteady aerodynamic force and moment of the model. The supporting device cannot simulate the dynamic hysteresis effect of aerodynamic force and torque under the condition of aircraft maneuvering

[0003] The free-rolling test device usually used in the dynamic high-speed wind tunnel test releases the degree of freedom of the model's roll, but the free-rolling test cannot be realized because the moving parts such as bearings in the free-rolling test device are affected by their own frictional damping The zero-damping working state of the device affects the simulation authenticity of the free rock movement of the model;

[0004] Moreover, the forced rock test device commonly used in dynamic high-speed wind tunnel tests also has imperfect functions. Because the drive motor is installed in the tail rod, the length of the tail rod available for the model is reduced; at the same time, the model is affected by The roll aerodynamic moment generated by the load will also affect the accuracy of the angle output of the roll drive motor

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