Method for directly measuring flight tension of propeller

A measurement method and technology for propellers, which are used in aircraft component testing, measurement of forces applied to control elements, etc., can solve problems such as high cost and complicated calculation procedures, and achieve the effect of low cost, low cost and simple method.

Inactive Publication Date: 2019-04-02
CHINESE FLIGHT TEST ESTAB
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Problems solved by technology

[0003] The purpose of the present invention is: provide a kind of direct measurement method of propeller flight pulling force, to overcome the technical problem that the indirect calculation method needs accurate calculation model, calculation procedure is complex and costly

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  • Method for directly measuring flight tension of propeller
  • Method for directly measuring flight tension of propeller
  • Method for directly measuring flight tension of propeller

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Embodiment Construction

[0024] The direct measurement method of propeller flight pulling force of the present invention is described below in conjunction with accompanying drawing.

[0025] In order to make up for the shortcomings and insufficiencies of the indirect calculation method, the present invention designs a direct measurement method of propeller tension based on load measurement.

[0026] Because the pulling force of the propeller is finally transmitted to the aircraft through the installation joint / tie rod system, as attached figure 1 Shown is the structural diagram of the installation section / tie rod system: A, B are the two main installation sections of the engine, C, D are the two auxiliary installation sections of the engine, E, F, G, H, I are the tie rods in the aircraft short There are five fixed points on the cabin, so the total pulling force of the propeller can be obtained by measuring the pulling force of the installation joint / tie rod system, and then superimposing the vector fo...

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Abstract

The invention belongs to the technical field of aircraft flight test power device testing and particularly relates to a method for directly measuring the flight tension of a propeller. The method, byperforming strain gauge modification and load measurement on a mounting joint / pull rod system, directly obtains the tension of the air propeller according to actually measured flight test data. The method comprises modifying a strain gauge on the mounting joint / pull rod system, performing a tension calibration test on the ground, obtaining a propeller tension-mounting joint / pull rod system straincalibration equation, and finally obtaining the tension of the propeller based on the actually measured flight test data under a flight condition. Compared with a model-based indirect calculation method, the tension direct measurement method does not require a large number of calculation models, and is low in sensor placement, production, installation and calibration cost. Thus, the method is simpler and less expensive. In addition, due to the high dynamic response capability of the strain gauge, the direct method is suitable for dynamic tension measurement and is also suitable for real-timemonitoring.

Description

technical field [0001] The invention belongs to the technical field of aircraft flight test power device testing, and in particular relates to a method for directly measuring propeller flight pulling force. Background technique [0002] How to effectively measure the pulling force of aviation propellers under flight conditions has always been a difficulty and focus in the field of flight test of aviation propellers in my country. The traditional propeller tension measurement method uses indirect calculation methods, including the engine / propeller model method, the propeller model method, and the total pressure increment method behind the propeller. These methods require a large number of ground tests, accurate calculation models, accurate component characteristics and calculation procedures, and many measurement parameters, so they are more complicated and expensive. In addition, domestic propeller manufacturers generally lack accurate propeller mathematical models, which m...

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Application Information

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IPC IPC(8): B64F5/60G01L5/22
CPCG01L5/22B64F5/60
Inventor 张强任瑞冬张永峰牛宏伟张帅
Owner CHINESE FLIGHT TEST ESTAB
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