Reliability Prediction on the Vehicle Control System

Vehicle control system is an important part of equipment, because it works in strong vibration, strong impact and high electromagnetic interference environment, its work reliability directly affects the campaign efficiency and the use security of whole equipment system. Therefore, the control system reliability must be carried out in the various stages, such as the design, assembly and platform test, and they are constantly perfected and improved in the use process. The reliability model of the system is established on introducing the system form and function frame of the vehicle control system, the fault rate and mean time between failures are calculated by applying the stress analysis method. Software test is finished, and software evaluation model is constructed by comparing difference software evaluation models, such as G-O model, J-M model, Littlewood-Verral model and Musa model. The result of intending can make the designers have completely known in the reliability design of electric circuit, it can provide the science basis to judge the designing project, and evaluation results are consistent with test results from platform, altitude, etc.