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System and method for measuring aerodynamic torque in wind tunnel test of aircraft

A technology of aerodynamic moment and wind tunnel test, applied in the field of wind tunnel test, can solve problems affecting aircraft design and performance evaluation, affecting aircraft free roll rate, etc.

Pending Publication Date: 2022-02-08
XIAN AEROSPACE PROPULSION TESTING TECHN INST
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Problems solved by technology

[0004] In order to solve the technical problem that in the existing ground wind tunnel test, the frictional resistance characteristics of the measuring equipment itself will affect the free roll rate of the aircraft, and then affect the design and performance evaluation of the aircraft, the invention provides an aerodynamic torque measurement method for the wind tunnel test of the aircraft. Measurement system and method

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  • System and method for measuring aerodynamic torque in wind tunnel test of aircraft
  • System and method for measuring aerodynamic torque in wind tunnel test of aircraft
  • System and method for measuring aerodynamic torque in wind tunnel test of aircraft

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Embodiment Construction

[0047] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] Such as figure 1 and figure 2 As shown, a measurement system for aerodynamic moment in an aircraft wind tunnel test includes a rotational speed measurement device, a torque sensor 3 and a motor 4 .

[0049] Such as image 3 and Figure 4 As shown, the rotational speed measurement device includes a rotating shaft mechanism 1 and a rotational speed sensor;

[0050]The rotating shaft mechanism 1 includes a rotating shaft mounting base 13 and a rotating shaft 11. The rotating shaft mounting base 13 includes a hollow housing 131 and end caps 132 arranged at both ends of the hollow housing 131. The rotating shaft 11 is installed in the hollow housing 131 through a bearing 12. The rotating shaft 11 can rotate freely in the hollow shell 131, and the front end of the rotating shaft 11 protrudes from the end cover 132...

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Abstract

The invention provides a system and a method for measuring the aerodynamic torque in a wind tunnel test of an aircraft, and solves the problem that in an existing ground wind tunnel test, the frictional resistance characteristic of measurement equipment affects the free rolling speed rate of the aircraft. The system comprises a rotating speed measuring device, a torque sensor and a motor. The rotating speed measuring device comprises a rotating shaft mechanism and a rotating speed sensor. The rotating shaft mechanism comprises a rotating shaft mounting seat and a rotating shaft, the rotating shaft penetrates the rotating shaft mounting seat through a bearing, and the front end of the rotating shaft extends out of the rotating shaft mounting seat and is coaxially connected with a test piece; the rotating speed sensor comprises a gear coaxially arranged on the rotating shaft and a proximity switch arranged in the mounting seat and matched with the gear, and the proximity switch measures the number of teeth passed by the gear to obtain the rotating speed of the rotating shaft. The torque sensor and the motor are sequentially and coaxially arranged at the rear end of the rotating shaft, the torque sensor is close to the rotating shaft, and the motor is used for driving the rotating shaft to rotate.

Description

technical field [0001] The invention belongs to the field of wind tunnel tests, and in particular relates to a measurement system and method for an aircraft to perform a free roll test in a gas flow wind tunnel to obtain free roll speed and rotational aerodynamic moment. Background technique [0002] In the design of aircraft, symmetrical blades or air rudders are designed to maintain the stability of the aircraft and achieve the purpose of precisely controlling the flight state. However, affected by factors such as processing and assembly errors, there will be some differences in the blades or rudder surfaces. In the actual flight process, the torque generated by the aircraft itself due to uneven force will cause the aircraft to rotate. The rotation rate exceeds the rated limit, which will cause The aircraft became unstable and the flight failed. [0003] The ground wind tunnel test is an important measure to obtain the aerodynamic characteristics of the aircraft and verif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06B64F5/60
CPCG01M9/06B64F5/60
Inventor 李国涛沈继彬朱舒扬王志武周亚奇雷倩楠关春王诚慧胡强曹一凡李鹏程雷佳颉
Owner XIAN AEROSPACE PROPULSION TESTING TECHN INST
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