Design Of Fuze Safety Initiation Control System Using Ballistic Correction Information

Intelligence,dexterity,and miniaturization are the development directions of future fuze.At the same time,the gradual application of ballistic correction technology on conventional ammunition provides more available environmental information for fuze safety systems and initiation systems.The real-time position information of the projectile is realized by the fuze The basis for full ballistic safety and full life cycle safety is laid.This article aims at medium and large caliber grenades with ballistic correction capabilities,conducts fuze safety and initiation system design research,and contributes to the further intelligentization and miniaturization of fuzes.Analyze the requirements of the fuze safety system and the initiation system for environmental information and the available environmental information brought about by the introduction of trajectory correction technology of conventional ammunition-satellite positioning position information.The centrifugal overload environment and projectile-shot distance are used as energy or incentive to release safety insurance,and the projectile height is determined as incentive to release fire insurance.Integrate the previous research on the design of MEMS safety insurance institutions and control circuits,introduce Markov theory to quantify and compare the safety and reliability of fuze safety initiation systems under different control logics,and use the "sequence" principle to determine the "dual environment muzzle." "Safety insurance + long-range safety insurance + recoverable ignition insurance" safety initiation control logic.Based on the above,an overall design plan is proposed.The fuze safety and initiation control technology with satellite positioning module are studied.The satellite positioning information interface circuit,communication protocol and ballistic coordinate system conversion algorithm are designed,and the absolute accuracy of the positioning accuracy is not more than 5m,which is satisfied by experiments.Aiming at the occasional gross error and missing data of the on-board satellite positioning receiver,the position information error correction algorithm was designed based on the extended Kalman filter algorithm and neural network algorithm,respectively.The feasibility of the experiment was verified and the advantages and disadvantages were compared and analyzed.Aiming at the problem that the power failure failure caused by the bomb on the shooting range caused the fuze to not work,a power supply safety scheme was designed.In terms of hardware optimization of the control circuit,a fara capacitor is introduced as a backup power supply,and a power switching circuit is designed to ensure that the fara capacitor is connected to continuously supply energy to the fuze after the power supply is disabled.A voltage stabilization circuit is designed to ensure the stability of the control chip.When the power fails,it will immediately send a low-voltage signal to the control chip to execute the corresponding control logic.In terms of control logic optimization,the time signal generated by the internal clock of the control chip is used instead of the ballistic correction module to provide the signal to release the instruction lock insurance,fire insurance,and explosion.In addition,the low power consumption mode of the control chip is used to effectively extend the working time.This scheme has been experimentally tested,and when the external power supply is disabled,the fuze can realize the safety initiation function equivalent to the electronic time fuze.Analyze the overall integration assembly requirements of the fuze system,design the components required for assembly,and check the overall high overload resistance.Because the fuse of the first level of this fuze,the flat micro-initiator,is directly welded to the control circuit,the assembly method and assembly sequence of the pyrotechnics are determined,and the circuit's high overload resistance is mainly studied.