Study On Design Of An Adaptive Starting Mechanism And Coordination Of Fuze And Warhead

The simulation software ABAQUS is used to simulate the impact of air defense missile on different targets and the motion of inertia switch.The inertia overload and the closing of the inertia switch under the impact inertia force in the process of missile impacting the target are simulated.The self-adaptive trigger mechanism is designed,which mainly includes MEMS inertia trigger circuit and inertia switch.The rationality of the design is verified by motion simulation and experiment.In addition,The trigger information of the adaptive trigger mechanism is logically determined with the target characteristics and rendezvous information provided by the seeker,so as to realize the integrated design of the guidance fuze which can precisely control the starting point of the warhead.The damage efficiency of air defense missile trigger fuze to different targets is improved.The main contents include:(1)By using the theoretical analysis method of awerbuch and Bodner,and taking the parameters of a foreign air defense missile as the calculation parameters,the plastic mechanics analysis of the impact of air defense missile on 1mm aluminum plate and 6mm steel plate is carried out.The finite element analysis software ABAQUS was used to model and simulate the impact of air defense missile on 1mm aluminum plate and 6mm steel plate.It provides the data base for the follow-up study.(2)The design and Simulation of the adaptive trigger mechanism composed of MEMS inertia trigger circuit and inertia switch are carried out.By using ABAQUS dynamics simulation,the action process of the inertia switch is analyzed.According to the simulation results and impact test,the characteristics of the MEMS trigger circuit and the inertia switch in the adaptive trigger mechanism of the air defense missile fuze are determined when they are subjected to different inertia forces.The identification and confirmation are carried out by the control chip in the circuit module,and the two signals can reliably initiate and transmit the detonation sequence Column.This paper studies the sensing ability and response speed difference of air defense missile fuze to different hardness targets by using MEMS acceleration sensor and inertia switch,provides the trigger signal characteristics of control chip,and interprets the sequence and pulse width information of signal characteristics by control chip.After the trigger signal is read by the control chip,combined with the communication information of the seeker,using the characteristic values of the target and the core damage area,the warhead is accurately delayed after calculation,so as to realize the integrated fuze warhead coordination design of the precise bomb point control and guidance fuze.The results show that the adaptive trigger mechanism can sense different hardness targets according to the time difference of two different trigger output signals,and the circuit control module can carry out precise delay initiation control according to the time difference of two signals of the adaptive trigger mechanism and the guidance information.The integrated design of guidance fuze is realized.