Safety And Optimization Analysis Of Fuse System Under Abnormal Trajectory Conditions

The fuze system,as one of the most important component in the warhead,makes sure that warhead detonate reliably at normal use,and minimizes accidental detonation in abnormal conditions.Independent safety-subsystem has been designed in the fuze system.Its main function is to determine whether the system is in a specified normal environment and implement safety control by setting the safety component to recognize the characteristics of a specific ballistic environment.The specific ballistic environment is generally taken out from the normal boost and sustained flight environment.Usually,several thresholds of the environment characteristics were used to judge whether it is permitting to arm.This design is easily realized and has high cost-effectiveness.However,due to the complex use environment and the inherent reliability of the weapon system,the fuze would suffer abnormal flight processes by accident.The simple distinction between storage and use status can no longer meet the safety requirements under actual combat conditions.In recent years,fuze safety has been more and more important.The military standards clearly clarify the principles of 'Arming delay' and 'Post-safe-seperation safety',which put forward higher safety requirements for the entire lifetime.This paper conducts research on the 'abnormal flight' environment,and proposes safety improvement design.The main contents include:The main failure modes of typical vehicles and the effectiveness to the flight trajectory are analyzed.By establishing an abnormal trajectory simulation method,a set of abnormal trajectories is obtained,which are used to prove the defect of the safety design based on the normal trajectory characteristic threshold.Different improved design has been brought out,which is based on flight delay time window,flight position information,and similarity judgment of flight characteristic.And a comparative analysis is completed.At the same time,the algorithm design for the‘similarity judgment of flight characteristic' has been brought out.And the calculation model is established.The software of the algorithm above has been programed,which is based visual C.With the abnormal trajectory set,the function validity verification of the software is completed,which proves the effective judgment algorithm for the abnormal environment identification.