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Embedded wind tunnel free flight test model pose acquisition method

An acquisition method and technology for test models, which can be used in aerodynamic tests, machine/structural component tests, and measurement devices, and can solve problems such as low precision of inertial sensors

Active Publication Date: 2021-03-30
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In wind tunnel tests, inertial devices are currently mostly used for static angle measurement rather than pose calculation, and due to the low accuracy of MEMS inertial sensors

Method used

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  • Embedded wind tunnel free flight test model pose acquisition method
  • Embedded wind tunnel free flight test model pose acquisition method
  • Embedded wind tunnel free flight test model pose acquisition method

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Embodiment Construction

[0061] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0062] In describing the present invention, it is to be understood that the terms "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or system referred to must have a specific orientation, and must have a sp...

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Abstract

The invention discloses an embedded wind tunnel free flight test model pose acquisition method, and relates to the technical field of flight tests. The embedded wind tunnel free flight test model poseacquisition method comprises the steps of: carrying out the interception of inertial sensor data according to a preset rule to obtain test effective data which comprises triaxial accelerometer data and triaxial gyroscope output data; performing low-pass filtering on the triaxial accelerometer data to obtain first data, and removing high-frequency vibration interference; performing band elimination filtering on the first data and the output data of the three-axis gyroscope to obtain second data, and removing pulsation interference of a pneumatic airflow; and carrying out recursive pose calculation on the basis of the second data to obtain six-degree-of-freedom pose information of the aircraft model within effective time in the test process. The embedded wind tunnel free flight test model pose acquisition method can improve the test precision for the application scene of the wind tunnel free flight test.

Description

technical field [0001] The invention relates to the technical field of wind tunnel flight test, and specifically relates to a method for obtaining the pose of a built-in wind tunnel free flight test model. Background technique [0002] The wind tunnel free flight test is a specific test method in the field of wind tunnel testing. Its principle is: in the wind tunnel test, the aircraft model is placed in the wind tunnel flow field by means of launching and dropping. At this time, the aircraft model has no Any support constraint is only affected by aerodynamic forces other than gravity. By capturing the position and attitude information of the aircraft model in real time, the static and dynamic stability derivative coefficients and other related aerodynamic coefficients of the aircraft can be obtained. Compared with the traditional wind tunnel test, its biggest advantage is that there is no support interference, and it can more realistically simulate the actual flight state o...

Claims

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Application Information

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IPC IPC(8): G01M9/06
CPCG01M9/06
Inventor 赵煊刘国东祝令谱王帅张娜
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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