Research On Reliability Of High Speed Fixed Wing UAV Landing Gear System

High-speed fixed-wing UAV is one of the main types of unmanned reconnaissance warfare aircraft used mainly in the military field.Because of its high speed and high voyage time,its application is becoming more and more popular.But along with its rapid development,many accidents that can not be ignored are happening one after another.In all types of accidents,many are caused by landing gear failures.Because the landing gear system determines the safety of UAV take-off and landing,it is an important subsystem that makes up the UAV.Although there are few researches on the reliability of high-speed fixed-wing UAV landing gear systems in our country,in order to avoid accidents caused by landing gear failures and it is necessary to carry out reliability research on the landing gear system of the high-speed fixed-wing UAV to improve the reliability of the system.Firstly,this paper analyses the development of UAV and the accidents,and expounds the necessity of reliability analysis of the high-speed fixed-wing UAV landing gear system.And through reading a lot of relevant material,summed up the relevant research situation at home and abroad.Secondly,the structure and function of the landing gear system of the high-speed fixed-wing UAV are analyzed,and then the FMECA-based fuzzy Bayesian network analysis method and FTA-based fuzzy Bayesian network analysis method based on the characteristics of the landing gear system are introduced in detail.Again,using two reliability analysis methods to comprehensively analyze the reliability of the landing gear system and summarizing the analysis results.Finally,according to the analysis results,some solutions to improve the reliability of the landing gear system are given,which will help the design researchers to improve the reliability of the landing gear system.