Research On Multi-point Initiation Control Technologybased On Fuze Electronic Safety And Arming Device

In order to provide reference for the design of multi-point initiation system based on Fuze electronic safety and arming device,the initiation control strategy and the coding method of initiation information were studied according to the characteristics of multi-point initiation system based on Fuze electronic safety and arming device.By analyzing the electromagnetic environment of the system,the detonation control strategy with anti-interference capability is studied.Based on the analysis of missile-target rendezvous conditions and the study of optimal firing control under different damage modes,a concise and efficient ignition information coding method is designed.In order to verify the validity of information coding and initiation strategy,a multi-point initiation system based on Fuze electronic safety and arming device is designed and fabricated by choosing microprocessor as the core processor.It mainly includes the schematic design of the peripheral circuit of the microprocessor,the power conditioning circuit and the RS422 communication circuit,and the PCB plate making and debugging.Based on the prototype,the implementation process including AD sampling,RS422 communication and information coding algorithm is also designed.Simulated initiation experiments of synchronization,delay synchronization and sequential initiation were carried out on a complete prototype of multi-point initiation system.The experimental results are as follows:Multi-point initiation control can complete the synchronous and sequential initiation control of three initiation points.The maximum synchronous initiation error of the system is 200 ns,and the maximum initiation delay error is 160 ns.The experimental results show that the multi-point initiation system based on Fuze electronic safety and arming device can realize multi-point initiation control with high precision by using initiation strategy and information coding method.Because of the influence of the electromagnetic environment in the system,the transmission of the coding and initiation signals and the electromagnetic interference in the system must be separated in time domain to ensure the reliable operation of the system.The initiation control strategy of "initiation start coding broadcast transmission,initiation unit independently select the mode of operation,initiation unit synchronous start,independent work" achieves this goal.The system function test results show that the system can work reliably under the boost conversion and high voltage discharge,the initiation unit can independently complete the set initiation action,and the initiation control strategy meets the system requirements.The analysis of missile-target rendezvous information and the coding of detonation information should not only meet the requirements of detonation control,but also take into account the operation ability of microcontroller.Priming mode is pre-coded and dynamically revised.Priming mode is pre-sent and dynamically updated,which reduces the operation pressure of the system.Simple information coding format improves the coding efficiency of the system.The system function test results show that the system coding module can quickly and accurately calculate the missile-target rendezvous information and complete the detonation information coding.The precise time synchronization algorithm of IEEE1588 protocol is applied to correct the timing of the initiation unit,which can reduce the timing asynchronism caused by the divergence of electronic devices in the initiation unit.The system function test results show that the synchronization between detonating units is improved,and the synchronization error within 10 ms is less than 50 ns.