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

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 ...

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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 large amount of experimental data to support, and there are problems such as high research costs and unfavorable engineering promotion.

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