Measuring device for wind tunnel large-amplitude roll oscillation experiment

Abstract

A measuring device for a wind tunnel large-amplitude roll oscillation experiment. A motor is connected with a dual-sine mechanism support through a speed reducer. A U-shaped block is fixed on sliding blocks. Sliding rails are fixed on upper and lower frames of the support. An eccentric wheel is arranged at the front end of an output shaft of the speed reducer and inserted into a rear slideway of the U-shaped block. An eccentric wheel is also arranged at the rear end of a balance supporting rod and inserted into a front slideway of the U-shaped block. The novel measuring device for large-amplitude roll oscillation experiment can realize the large-amplitude roll oscillation of a flight vehicle through the specially-designed ''dual-sine roll oscillation'' mechanism, and measures the dynamic and pneumatic characteristics of the large-amplitude roll oscillation of the flight vehicle through a six-component balance at the front end of the supporting rod, thereby meeting the requirements of the wind tunnel experiment.

Description

technical field [0001] The invention relates to a rolling vibration device, specifically a measuring device for a large-amplitude rolling vibration test in a wind tunnel that can measure the aerodynamic characteristics of an aircraft during a large-scale rolling vibration. The invention belongs to the technical field of aviation aerodynamic wind tunnel test. Background technique [0002] In order to meet the requirements of close-range combat and all-round attack, modern fighter jets prominently pursue super-maneuverability and agility. The former is mainly related to the form of movement with large amplitude and high angular rate, and the latter mainly refers to the rapid transition from one flight state to another. Transient response capability for another state. The main problem brought by these two to aircraft design is that both of them are closely related to the unsteady and nonlinear aerodynamic force. In a specific flight state, the unsteady and nonlinear aerodynami...

AI Technical Summary

Problems solved by technology

In the preliminary wind tunnel test, it was found that the program controlled the reciprocating motion of the servo motor itself to drive the rolling vibration of the model. When setting the small angle amplitude and frequency, the output torque of the motor can still meet the demand, and the actual amplitude angle error of the model It is also within the acceptable range; but when the motor setting angle reaches the angle and frequency required by the large-amplitude rolling test, the output torque of the motor is difficult to meet the requirements of the model for sinusoidal rolling vibration due to the large moment of inertia of the model

The existing rolling equipment is difficult to meet the test needs

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