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A Roll Damping Compensation Method for Free Rolling Dynamic Experiment in Wind Tunnel

A compensation method and rolling technology, which is applied in the field of rolling damping compensation, can solve the problems of large difference in mechanism damping, difficulty, and poor versatility, and achieve the effect of small mechanism damping and reduced mechanism damping

Active Publication Date: 2022-03-25
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After various measures are implemented, the mechanism damping can indeed be effectively reduced, but the mechanism damping of each aircraft model is very different. Once the aircraft model is replaced, it is necessary to design proprietary measures to reduce the mechanism damping for the corresponding aircraft model. poor versatility
Moreover, the mechanism damping of each aircraft model is very different, and how to eliminate the influence of each aircraft model mechanism damping in the data analysis process is also relatively difficult

Method used

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  • A Roll Damping Compensation Method for Free Rolling Dynamic Experiment in Wind Tunnel
  • A Roll Damping Compensation Method for Free Rolling Dynamic Experiment in Wind Tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the rolling dynamic test mechanism I used in this embodiment is a T-shaped rod structure, including a horizontally placed tail rod. A mandrel 5 is installed on the central axis of the tail rod, and the front end of the mandrel 5 protrudes from the tail rod. The rod is fixedly connected to the balance 3, and the balance 3 is fixedly connected to the aircraft model; the rear end of the mandrel 5 protrudes from the tail strut, and the top and bottom of the mandrel 5 rear end are symmetrically installed with a torque actuator 1, and two torque actuators 1 It is used to drive the aircraft model to perform rolling motion to generate a rolling moment, and also apply a compensation rolling moment with different amplification factors to the aircraft model; the rear end of the mandrel 5 is fitted with a rotary encoder 2 .

[0043] a. Determine the damping compensation objective function g=func(x)

[0044] When studying the rocking characteristics of an...

Embodiment 2

[0062] Such as figure 2 As shown, the structure of the rolling dynamic test mechanism II used in Example 2 is basically the same as that of the rolling dynamic test mechanism I. The main difference is that the torque actuator 1 is equipped with a geared motor 4 for amplifying the rolling torque.

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Abstract

The invention discloses a roll damping compensation method used in a wind tunnel free roll dynamic experiment. The method includes the following steps: determining the damping compensation objective function; determining a system control strategy; determining system control parameters; and implementing wind tunnel experiments. When the damping compensation objective function and aircraft model remain unchanged, the first three steps can be performed only once, and the fourth step only needs to be repeated for each operation of the wind tunnel. The rolling damping compensation method used in the wind tunnel free rolling dynamic experiment of the present invention drives the aircraft model to perform rolling motion through the torque actuator to generate rolling torque, and also uses the torque actuator to apply different amplification factors to the aircraft model Compensate the rolling moment, and then reduce the mechanism damping, so as to meet the requirement of the free rolling dynamic experiment on the mechanism damping as small as possible.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel dynamic experiments, and in particular relates to a rolling damping compensation method used in wind tunnel free rolling dynamic experiments. Background technique [0002] The free rolling dynamic experiment is a kind of wind tunnel dynamic experiment. During the free-rolling dynamic experiment, the aircraft model rolls freely under the action of aerodynamic force. By analyzing the rolling motion process of the aircraft model or the dynamic aerodynamic force during the rolling motion process, the roll characteristics of the aircraft model including rock characteristics can be obtained. Rotational aerodynamic characteristics. [0003] The vehicle model is affected by mechanism damping and aerodynamic damping in free-rolling dynamic experiments. Among them, aerodynamic damping is one of the key parameters determining rock characteristics, but mechanism damping has a greater impact on rock char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/02
CPCG01M9/02
Inventor 杨海泳赵忠良马上李乾李玉平
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT