Reliability Study Of Unmanned Aerial Vehicle Hangar Based On ME-OWA And Constraint Under The Index Of Overall Cost

The reliability research was to improve the reliability of the machine through preventive and corrective maintenance during the operation of the machine so as to reduce the occurrence of failures and maintenance cost.Mechanical reliability is related to the personal safety and economic benefits of operators,so the study of mechanical reliability is very important.Therefore,this paper studies the reliability of unmanned aerial vehicle hangar based on maximum entropy ordered average(ME-OWA)and constraint under the index of overall cost.The ME-OWA was based on the objective feasibility technique,The order weighted average operator was used to derive polynomial equations to determine the optimal weighted vector under maximum entropy.the defects of objective feasibility technique and average weight distribution method were solved.Cost constraint was a dynamic maintenance cycle optimization model for multi-component systems.The effects of different maintenance intervals on system reliability and maintenance cost were determined under the conditions of limited maintenance time and insufficient component maintenance of system.The model’s aim was to ascertain the system maintenance cost,and the preventive maintenance period was determined by the lowest system dependability.Firstly,a new type of unmanned aerial vehicle hangar has been developed using a modular design method,which includes modules such as positioning,cabin,apron lifting,and charging.The system hardware includes the main controller,power conversion,motor control,communication,etc.The control system module architecture for unmanned aerial vehicle hangar is based on the STM32F407 processor of ARM Cortex-M4.The communication protocol adopts CAN bus,which has the characteristics of simple structure,high utilization rate,and more stability.Secondly,the ME-OWA algorithm was used to predict the failure rate of each module of the unmanned aerial vehicle hangar to calculate the cost of corrective maintenance.The reliability model of unmanned aerial vehicle hangar was established according to the series and parallel relationship of each module.The optimal number of preventive maintenances was determined to control the preventive maintenance cost in the condition of reliability objectives.The modules with high failure rate of unmanned aerial vehicle hangar were improved to reduce corrective maintenance costs,and the purpose of cost optimization was realized.the reliability of unmanned aerial vehicle hangar was compared under fixed maintenance period and non-fixed maintenance period.The results show that its reliability was more stable under nonfixed maintenance period.Finally,the test and apply the system function of unmanned aerial vehicle hangar after preventive maintenance,the experimental results show that the operation efficiency of unmanned aerial vehicle hangar was high,and the timeliness and accuracy of the state feedback also reach the expected level,and the reliability requirements of the design and application were met.