Method for testing service life of parachute recovery skid buffer small and medium-sized unmanned aerial vehicle body

A life testing and unmanned aerial vehicle technology, applied in the field of unmanned aerial vehicles, can solve problems such as the increase in the number of fatigue tests, a large amount of flight monitoring data, and large deviations in the life prediction and evaluation results of the unmanned aerial vehicle body structure

Pending Publication Date: 2021-09-14
XIAN AISHENG TECH GRP +1
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of this method are as follows: first, a large amount of flight monitoring data is required; second, when there are many key components, the number of fatigue tests will increase significantly and be complicated; third, when the key components are not determined properly, it will lead to Structural life prediction and evaluation results have large deviations

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  • Method for testing service life of parachute recovery skid buffer small and medium-sized unmanned aerial vehicle body
  • Method for testing service life of parachute recovery skid buffer small and medium-sized unmanned aerial vehicle body
  • Method for testing service life of parachute recovery skid buffer small and medium-sized unmanned aerial vehicle body

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Embodiment Construction

[0050] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0051] During the development of UAVs, multiple flight tests must be carried out to evaluate the flight performance of UAVs. Generally, the number of flight test flights of a certain UAV is far less than the lifespan of the UAV body. The specified number of sorties.

[0052] The load condition of the small and medium-sized UAV recovered by parachute recovery skid buffer is the most severe. During the parachute recovery, the sinking speed of the drone is 5m / s~6m / s. After the skid buffer, the maximum acceleration of the landing impact is about 200m / s 2 , with a centroid overload of about 20. The recovery and landing stage of small and medium-sized UAVs played a decisive role in the life of the UAV body.

[0053] The invention provides a method for testing the body life of a small and...

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Abstract

The invention discloses a method for testing service life of a parachute recovery skid buffer small and medium-sized unmanned aerial vehicle body, and belongs to the field of unmanned aerial vehicles. The method comprises the following steps: firstly, calculating a landing simulation test quantity n2, a landing simulation test free falling body putting height H and various road surface landing simulation test quantities according to assessment unmanned aerial vehicle parameter information and a recovery landing road surface recovery quantity percentage; and then performing testing according to a normal test program. According to the method, a flight test and a landing simulation test are combined, a large amount of flight monitoring data is not needed, a fatigue test is not needed, only a small amount of landing simulation tests need to be carried out in combination with calculation according to the characteristics of parachute recovery skid buffering small and medium-sized unmanned aerial vehicles, and the method has the advantages of being simple in test, short in test period, small in risk and low in cost.

Description

technical field [0001] The invention belongs to the field of unmanned aerial vehicles, and in particular relates to a method for testing the body life of small and medium-sized unmanned aerial vehicles by parachute recovery and skid buffering. Background technique [0002] The body life of small and medium-sized UAVs is generally specified by the number of flight sorties. In the process of UAV performance appraisal, the life of the UAV body can be assessed through flight tests, or the test analysis method can be used to predict and evaluate. Patent "A Method for Determining Life of UAV Airframe Structure Suitable for Low Cost", Publication No. CN104101548B [Chinese], the feature of this invention is: analyze the statistical data of UAV maintenance support, determine the structure of UAV body Key components; then determine the reference load spectrum of key parts through flight simulation and flight monitoring data, and determine the cumulative fatigue damage of key componen...

Claims

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Application Information

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IPC IPC(8): B64F5/60
CPCB64F5/60Y02T90/00
Inventor 庞俊锋石磊孟毛毛王丹段亮弟安彬李胜利
Owner XIAN AISHENG TECH GRP
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