Study Of A Rocket Bouncing Bottom Electromechanical Interference Fuze Key Technologies

The fuze is applied to wide band passive window projectile, infrared chaff shell and countermeasure chaff shell of weapon system of a certain type, the main combat mission can load action time of fuze, make corresponding window rocket timely air burst, interfere with the target in a given target coordinate. The fuze has detonator safety, safety redundancy, arming delay time, air burst according to the determined time, sterilization, dissipation ignition power of fuze after fuze failure.In order to analyze zigzag slot arming device structure parameters impact on the arming performance, theory analysis model and mathematical model were established, characters of structural parameters were analyzed using the MATLAB numerical software.reached the influence of structural parameters on the motion of inertial cone.the results show that the zigzag slot in the actual design agencies, to improve the arming perfoemance can reduce the angle of zigzag slot, reduce quality of inertia cone, increase stiffness of inertial spring, increase the preloading of inertia spring, decrease friction coefficient between the guide pin and zigzag slot, decrease friction coefficient between the inertia cone and fuze, increase zigzag slot long, choose the best zigzag slot number and other comprehensive measures, whereas against safety for handing of fuze.In order to analyze motion process of zigzag slot arming device, arming reliability and safety for handing were simulated and researched by using the ADAMS software,reached the movement characteristic of the inertial cone. The results show that zigzag slot arming device can arming reliably under80g launch overload, the device can ensure safety of the safe feature droping steel, cement and sand target at1.5m height, the simulation results is identical with experimental results. Zigzag width, zigzag fillet and zigzag depth were analyzed on the influence of inertia cone motion, they cannot be analyzed in the MATLAB numerical calculation, the results showed that increasing zigzag width, zigzag fillet and zigzag depth can improve the arming reliability of zigzag slot.In order to test the movement time of inertial cone arming device droping different target, the drop testing scheme of zigzag slot arming device was designed. The results show that:the overload was different when the device droped the different goals, steel, cement and sand, response time was millisecond level. The testing experiments further verify that the zigzag slot arming device is safety droping the steel, cement and sand target in1.5meters height.In order to study the thermal protection structure of base fuze circuit under the high temperature of rocket engine, the temperature field of base fuze was simulated using the ANSYS software,reached the temperature distribution of the base fuze.The results show that the material with large volume heat capacity should be choosed when the thermal insulation system was the single heat insulation materials; The material with low thermal conductivity should be used the outer, the material with larger volume heat capacity is used inner when the insulation system is multi-layer composite structure.