Analysis Of Life Consistency And Optimal Design Technology Of Relay Based On Process Data

As a key control element in electronic systems,electromagnetic relays are widely used in aerospace systems such as space vehicles and satellites.As the relay develops towards the goal of aerospace-class and high reliability,it is not only necessary to meet the requirements of its reliable breaking times,but also the goal of improving the consistency of the life of the relay is also important.Under the current domestic design and manufacturing level,there is still a problem of poor consistency in the life of batch products.Therefore,in order to improve the stability of the relay work and ensure the reliable operation of the entire system,this paper uses the method of robust tolerance design based on the actual machining and assembly process of the relay to optimize the tolerance of the key design parameters of the relay,thereby improving its life.consistency.First of all,in order to ensure the accuracy of the simulation model of the virtual prototype of the relay,and to understand the product assembly process,the batch production process of the relay was investigated,and the process data of the product was tested,including the dimensional parameters of the parts and the assembly parameters of the product.Use the modeling software UG to establish a threedimensional geometric model of the relay machine,and modify the simulation model according to the central value of the parameter test during the investigation process.The electromagnetic field analysis software FLUX is used to establish the finite element simulation model of the relay electromagnetic system,and the dynamic analysis software ADAMS is used to establish the reaction force simulation model of the relay contact system,and then the dynamic output characteristics of the relay are analyzed through co-simulation,and the dynamic characteristic parameters are actually tested.The results verify the accuracy of the simulation model.Secondly,because it is difficult to directly establish the functional relationship between the design parameters of the relay and the life,this paper extracts the key dynamic characteristics that have a significant impact on the life of the relay as the characteristic quantity based on the degradation data of the characteristic parameter during the life test process,and uses the characteristic quantity as the intermediate variable,Through the following two models to jointly establish a relay life model.One is a fast calculation model between design parameters and characteristic quantities,and the other is a fast calculation model between characteristic quantities and life.Finally,the fluctuation range is determined according to the actual measurement results of the design parameters.Based on the Monte Carlo stochastic process theory,a virtual sample of the design parameter is generated within the current tolerance range,and the life distribution of the virtual sample is analyzed.With the goal of improving the life consistency of relay batch products,the established fast calculation model of relay life is used to carry out robust tolerance design.By comparing the distribution of the consistency of the relay life before and after the optimization,the correctness of the tolerance optimization scheme is verified.