Fuze Electronic Boost And Initiation Circuit Design

Compared with the traditional mechanical detonation method,fuze electronic booster has the advantages of high precision,strong stability,safety and reliability,which can meet the needs of modern military and civil fields and has a wide application prospect.From the perspective of circuit design and safety control,this paper simulates and verifies the designed circuit and program,and completes the research and design of fuze electronic boost and detonation.Firstly,according to the analysis of the structure and characteristics of the commonly used switching power supply,the flyback topology is determined as the main boost circuit.On this basis,the working principle of the flyback converter circuit is studied in detail.After analyzing the safety control theory of booster termination insurance,the number of environments for termination insurance is determined,and the termination insurance mode of two static electric insurance and one dynamic electric insurance is determined according to the type of insurance combination.The key technologies are analyzed and the control flow is set up,and the scheme design of boost and initiation circuit and its safety control is completed.Secondly,the power supply module that can meet the power demand is designed,including DC-DC isolation,linear regulator,control chip power and isolated drive power supply.Two static safety switches in the relief booster circuit are set to have completely different effective forms,and the dynamic switch design is completed.Using a solid-state pulse switch as a high-voltage switch,combined with isolation drive and surge protection,a detonation trigger circuit was designed using double insurance and a control form opposite to the arming circuit,and the detonation circuit design was completed.According to the design scheme of safety control and the idea of modularization,the internal design of CPLD and FPGA is divided into modules with different functions and independent of each other with the setting of the arming signal.The program control design is completed by Quartus II software and Verilog language.Finally,the simulation model of boost main circuit is built by PSpice software,and the feasibility of high voltage capacitor charging is verified.The circuit model of detonation circuit is built,and the influence of different parameters is simulated and analyzed.The control program of CPLD and FPGA is simulated and verified by Modelsim,and the results are consistent with the security control process setting.The booster charging test was designed and completed,and the explosion foil initiation was observed.The boost and detonation simulation,control program simulation and test all show that the circuit design and safety control meet the requirements and can complete the boost detonation.