Lifespan determination method suitable for low-cost unmanned aerial vehicle (UAV) body structure

An unmanned aerial vehicle, low-cost technology, applied in the direction of applying repeated force/pulsation force to test the strength of materials, etc., can solve the problems of unfavorable engineering promotion and high research cost

Inactive Publication Date: 2014-10-15
PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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Problems solved by technology

However, the common features of the above methods are: the determination of important parameters in the model requires a larg...

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  • Lifespan determination method suitable for low-cost unmanned aerial vehicle (UAV) body structure
  • Lifespan determination method suitable for low-cost unmanned aerial vehicle (UAV) body structure
  • Lifespan determination method suitable for low-cost unmanned aerial vehicle (UAV) body structure

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Embodiment Construction

[0056] The specific implementation of the method for determining the life of the unmanned aerial vehicle body structure suitable for low cost will be described in further detail below in conjunction with the accompanying drawings.

[0057] In this embodiment, the damage coefficient method for evaluating the structural life of the UAV body is described in detail. figure 1 In the above, take a key component of the UAV as an example, monitor the load of each flight segment of the component, and use S i Indicates the load, with n i Indicates the corresponding number of cycles; according to the monitoring and statistical data, it is determined that the cumulative damage of the component in each flight segment is D i , and the unit range damage coefficient k i ; Test or experience to obtain the non-destructive critical value of the component, that is, the component can withstand the maximum cumulative damage D max ; According to the recorded data of known missions, calculate the ...

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Abstract

The invention relates to an economic and practical unmanned aerial vehicle (UAV) lifespan assessment method characterized in that: based on the characteristics of low itself safety requirements and no casualties of an UAV, the statistical data of maintenance support of the UAV is analyzed to determine key components of an unmanned aerial vehicle (UAV) body structure; base load spectrum of the key components can be determined by flight simulation and flight monitoring data, the cumulative fatigue damage of the key components can be determined by small amount of fatigue tests; and finally, according to simulated and monitored mission profile load spectrums, unit voyage damage coefficients of each mission profile of the components can be determined to obtain the flight number and voyage affordable by each key component, and a minimum value is selected as the fatigue lifespan of the unmanned aerial vehicle (UAV) body structure. The beneficial effects of the economic and practical unmanned aerial vehicle (UAV) lifespan assessment method are that: the complex modeling is abandoned, the flight monitoring data is made full use, the calculation is convenient, the economic benefit is obvious, the operation method is simple, practical and strong in engineering practicality, and the lifespan of the unmanned aerial vehicle (UAV) body structure can be accurately predicted and evaluated.

Description

technical field [0001] The invention belongs to the technical field of analyzing fatigue strength and fatigue life of aircraft structures, and in particular relates to an economical and practical life evaluation method for unmanned aerial vehicles. Background technique [0002] With the continuous development of information technology, drones have become an important node in the field of informatization and intelligence, and have extremely important applications in both military and civilian fields. Medium and large UAV systems composed of various information-based equipment have continuously expanded functions, and the airborne equipment has become more and more advanced, complex and expensive. Compared with nearly a hundred units currently developing and producing UAVs, domestic research institutions for UAV structural life assessment technology can be described as "rare". Compared with the strict life determination mechanism of manned aircraft, the life determination of ...

Claims

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Application Information

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IPC IPC(8): G01N3/32
Inventor 芦利斌金国栋朱晓菲谭力宁叶庆沈涛
Owner PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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