Dynamic response characteristic test method for air propeller electric propulsion system

An air propeller and system dynamics technology, applied in the field of aerodynamics, can solve the problems of high cost of wind tunnel test, unsuitable for dynamic response characteristic test of propeller electric propulsion system, simulated gust of wind, etc., and achieves low test cost and good flow field quality. , the effect of large cross-sectional area

Active Publication Date: 2017-06-09
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Conventional large-scale low-speed wind tunnels can be used to test the aerodynamic characteristics of propellers, but it is difficult to simulate gusts through changes in wind speed in wind tunnel tests, and the cost of wind tunnel tests

Method used

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  • Dynamic response characteristic test method for air propeller electric propulsion system
  • Dynamic response characteristic test method for air propeller electric propulsion system
  • Dynamic response characteristic test method for air propeller electric propulsion system

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[0029] The present invention is further described below in conjunction with the accompanying drawings and the case of the dynamic response characteristic test test implementation case when the propeller electric propulsion system encounters a gust:

[0030] see figure 1 , figure 1 (a) is a side view of the propeller electric propulsion system test system, figure 1 (b) is a front view. Incoming flow simulation system, propeller speed control system, data measurement system and bracket;

[0031] The incoming flow simulation system includes an experimental section 9, a track 8, a trailer 7, a trailer power supply system and a control system; the experimental section 9 is a closed space; the track 8 is a parallel double track, fixed in the experimental section 9; The trailer 7 moves along the track at a specified speed under the control of the trailer power supply system and the control system.

[0032] The data measurement system includes a two-component balance 2 and a data ...

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Abstract

The invention relates to a dynamic response characteristic test method for an air propeller electric propulsion system. The method comprises: a ground test system of an electric aircraft propeller is constructed; a trailer is accelerated to be at a steady-state speed at different accelerated speeds, the acceleration state is kept for a period of time, and a tensile force and a torque of the propeller and a rotating speed of the motor are measured; the speed of the trailer is kept to be constant, the rotating speed of a motor is adjusted, and a tensile force and a torque of the propeller are measured; and the influence on the rotating speed of the motor by a trailer speed change as well as influences on the tensile force and torque of the propeller by the trailer speed change or motor rotating speed change is analyzed. The test method has the following advantages: the trailer speed can be controlled precisely; the trailer system has the large accelerated speed; the marching speed of the propeller can be changed; and the dynamic response characteristic of the propulsion system can be simulated when gust happens. The speed regulation characteristic of the electric propulsion system of the propeller can be measured by changing the rotating speed instruction of the motor. The test method is suitable for a dynamic response characteristic test of a propulsion system of a low-speed electric propeller aircraft.

Description

technical field [0001] The invention relates to a dynamic response characteristic test method of an air propeller electric propulsion system, which is used for testing the dynamic response characteristic and the speed regulation characteristic of the propulsion system when the propulsion system of a low-speed electric propeller aircraft encounters a gust, and belongs to the technical field of aerodynamics. Background technique [0002] When an electric propeller aircraft flies at low altitude, its flight speed is generally low. When it encounters a gust, it is difficult to actively avoid it. After the gust, its load increment and dynamic flight characteristics change very obviously, which seriously affects its flight attitude and structural deformation. Even lead to safety accidents. When the propeller electric propulsion system as its power device encounters a gust of wind, the load on the propeller disk will change drastically, and the tension and torque of the propulsion ...

Claims

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Application Information

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IPC IPC(8): G01M9/06
CPCG01M9/06
Inventor 李锋贾永清李广佳李喜乐周波孙凯军朱文国
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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