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Synchronous measurement method of three-dimensional real-time attitude angle of low-speed wind tunnel test model

A wind tunnel test and synchronous measurement technology, applied in the direction of measuring device, aerodynamic test, machine/structural component test, etc., can solve problems affecting data accuracy, affecting test data quality, vibration amplitude measurement error, etc. Achieve the effects of saving time and power, improving test efficiency, and achieving significant military and economic benefits

Inactive Publication Date: 2014-10-29
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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Problems solved by technology

Due to the influence of the elastic deformation of the strut and the mechanical clearance of the device, firstly, there is a large error in the measurement of the vibration amplitude, which directly affects the quality of the test data; secondly, there is a time lag between the measured displacement and angle signals and the real movement of the model , will add an additional phase between the aerodynamic load of the test data and the attitude of the model, which directly affects the accuracy of the data, and is more obvious when the multi-degree-of-freedom forced vibration

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  • Synchronous measurement method of three-dimensional real-time attitude angle of low-speed wind tunnel test model

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Embodiment Construction

[0010] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0011] The synchronous measurement method described in the present invention is implemented through the following specific steps.

[0012] Step 1: Use the Optotrak optical displacement measurement system to establish the wind tunnel coordinate system and the model rigid body, and measure the Euler rotation angle of the model rigid body in the wind tunnel coordinate system in real time.

[0013] Step 2: Use the Euler angles of the rigid body to obtain the transformation matrix from the rigid body coordinate system to the wind tunnel coordinate system.

[0014] The Euler angles of the rigid body are the rotation angles φ, θ, and ψ in the order of the Z axis, Y axis, and X axis, such as figure 2 shown. The transformation matrix between the rigid body coordinate system before and after rotation...

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Abstract

The invention discloses a synchronous measurement method of a three-dimensional real-time attitude angle of a low-speed wind tunnel test model. The method applies an Optotrak optical displacement measurement system to enable the wind tunnel test model to be a rigid body and measure a rigid body euler angle, the attitude angle of the model is solved through the rigid body euler angle, and synchronous measurement of the attitude angle of the model and other signals (such as a balance signal) of wind tunnel tests is achieved. The measurement method is verified by multiple wind tunnel tests, and the accuracy, real-timeliness and synchronism meet the test requirements.

Description

technical field [0001] The invention relates to a method for measuring the attitude angle of a model in a wind tunnel test, in particular to a method for synchronously measuring the three-dimensional real-time attitude angle of a low-speed wind tunnel test model. Background technique [0002] In the wind tunnel test, the accuracy of the attitude angle measurement of the model (aviation or aerospace vehicle, etc.) is directly related to the quality and characteristics of the test data. In the dynamometer test, due to the large weight of the model, the error between the nominal attitude angle and the real attitude angle leads to a considerable error in the amount of aerodynamic force generated by deducting the model's own weight. The use of continuous scanning technology can improve the quality of test data and operational efficiency, but the premise is that the real-time angle of attack and real-time sideslip angle of the model must be obtained synchronously with the aerodyna...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
Inventor 顾艺温渝昌车兵辉张鹏倪章松黄勇张卫国孙海生黄明其姜裕标祝明红查霄虹
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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