Fuze Mems Structural Design Of Universal Switch Analysis And Numerical Simulation

The technology of Micro Electromechanical Systems (MEMS) highly boosts the micromation's development in the system of fuze. The dissertation mainly does research on the universal switch which controls the detonation circuit. The function of the universal switch is analyzed. The universal switch can not only sense acceleration signals, but also perform the on-off functions under the threshold accelerations.First, after analyzing the fuze environment of the universal switch, several performances which influence the functions of the universal switch are put forward, such as fast response, long cut-off time, universal property, anti-high overload, anti-flying performance and so on. The universal switch's principle and theoretical modal are discussed. The structure of the universal switch is designed according to requirement. Structure parameters which influence the switch's performance are analyzed.Second, finite element method is used to simulate the universal switch's behavior, both static and dynamic, to validate if the switch has the abilities of universal property, anti-high overload, fast response, and long contact time. Besides, structure parameters which have a strange effort on the universal switch's performance are found by the simulation, such as the radius and width of the supporting spring. The structure parameters of the universal switch are determined. By the simulation, we can get that the switch's threshold is 300g and the response time is 110μs.Final, after the structure is confirmed, professional software Coventor Ware is used to simulate the switch's process.