Dynamic response characteristic test method for air propeller electric propulsion system

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 ...

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 is relatively expensive; ground vehicle tests can flexibly control vehicle speed, but are vulnerable to external wind. These two methods are not suitable for the dynamic response characteristic test of the propeller electric propulsion system.

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