Impact testing device for parachute landing unmanned aerial vehicle damper and method thereof

Abstract

The invention relates to an impact testing device for a parachute landing unmanned aerial vehicle damper and a method thereof. The impact testing device comprises a displacement sensor, an electric discharging loop, an electric discharging coil, an induction coil, a conical driving head, a guiding shaft and a pressure sensor. The electric discharging loop performs instantaneous electric discharging on the electric discharging coil. Strong pulse current is generated in the discharging coil and furthermore an alternated high-strength magnetic field is formed at the periphery of the discharging coil. The induction coil closely abuts against the electric discharging coil. Because electromagnetic induction generates strong eddy current, the directions of the magnetic fields generated by the electric discharging coil and the induction coil are opposite, thereby generating an electromagnetic repulsion force, namely an electromagnetic impact force. The electromagnetic impact force performs impact loading on a to-be-tested damper through the conical driving head and the guiding shaft. Impact force data are acquired through a pressure sensor. Compression amount of the damper is acquired through the displacement sensor. The impact testing device and the method have advantages of accurate controllable impact force, high stability, simple operation and small land occupation. The impact testing device and the method thereof overcome defects of large land occupation, tedious operation and limited impact energy in a landing vibration testing platform for damper impact testing.

Description

technical field [0001] The invention belongs to the technical field of impact testing, and in particular relates to an impact testing device and method for a shock absorber of a parachuting unmanned aerial vehicle. Background technique [0002] At present, drone recovery is mainly divided into two methods: taxi landing and parachute landing. In order to recover easily and not be restricted by the site, small and medium-sized UAVs mostly use parachute landing to recover. As an important part of the parachute UAV recovery system, the shock absorber is mainly responsible for absorbing the impact energy from the ground when the UAV lands to avoid body damage. Therefore, whether the shock absorber is safe and reliable is very important. Before the shock absorber leaves the factory and when it reaches a certain number of uses, it is necessary to perform an impact test on the shock absorber. [0003] The existing shock absorber impact test device generally adopts a drop test benc...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of large floor space, cumbersome operation and limited impact energy of the shock absorber shock test drop test bench, the present invention provides a shock absorber shock test device and method for parachute drones, based on the principle of electromagnetic induction, The impact energy is large, the impact force can be precisely controlled, the stability is good, the operation is simple, and the floor space is small

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