Research on System Reliability of Eight-Rotor Fire-Fighting UAVS

In this paper, two methods, basic reliability analysis and mission reliability analysis, are used to analyze and calculate the system reliability of "Sky Dragon I" eight-rotor fire-fighting UAV specially designed for high-rise building fires and developed by the research group. The two methods are based on the reliability model, considering the correlation among the units of the reliability model, the upper and lower bounds of the system reliability, system failure rate and MTTF of the series and parallel reliability model are deduced, and the reliability parameters of "Sky Dragon I" are calculated. The novel points of this paper are as follows: 1) The application of the two methods in the complex system of eight-rotor fire-fighting UAVS is a brand-new research. 2) Most of the traditional system reliability research is based on the premise that each unit is independent of each other. In this paper, a new analysis and calculation is carried out under the premise of considering the correlation among the units of the reliability model. The results show that the reliability of the UAV meets the requirements. However, the safety and reliability of the whole system are not perfect enough. In order to improve the safety and reliability of the fire-fighting UAV, the corresponding reliability design optimization and tests will be carried out later.