Study On The Detonation Transmission And The Detonation Proof Performance Based On The MEMS S&A Device

MEMS technology has a very good application prospect in the fuze field because of its advantages.Although China already has the ability to develop MEMS fuze,but at present the MEMS process in China is not mature,processing MEMS mechanism still casts high.So the MEMS fuze is not competitive in price compared with traditional fuze,and can not be applied to conventional ammunition.To solve this problem,this paper designed a low cost MEMS S&A device processed by micro EDM and UV-LIGA technology,and a micro detonation train suited the structure of the MEMS S&A device,Which speed up China's engineering application process of MEMS fuze.Compared the characteristics of three kinds of MEMS processing technology,and the optimal design of a MEMS S&A device is carried out based on the low cost processing method.Under the premise of reducing the size of the security system,at the mean time most of the institutions can be processed by micro EDM technology to achieve the purpose of reducing processing costs.Based on the application background of a single soldier rocket,the motion analysis and performance verification of MEMS S&A device are carried out by theoretical calculation and numerical simulation.Results show that the recoil safety can reliably discharge under 1500 g recoil;a pin-push device controlled by delay circuit is the second selling insurance,which can be armed reliably,and it can ensure the muzzle safety distance is above 10m;under the projectile's rotating speed of 20r/s,the flameproof plate can move to arming position driven by the centrifugal force.Analyzed the anti-dropping performance of the MEMS S&A device through numerical simulation software,results show that the MEMS S&A device is able to withstand 15000 g dropping force in the direction of recoil,and 8000 g in the direction of centrifugal force.Performance of the MEMS S&A device meets the design requirements of the application background.According to detonation theory and the MEMS S&A device's specific structure,designed a double-L shaped micro detonation train,the detonation train is composed of a electric detonator,a lead charge installed in the detonation-proof plate and a booster.The mathematical model of process the detonator detonates the lead charge is established.Calculation result show that the electric detonator can reliably detonate thelead charge.Though LS-DYNA software,simulated the process the detonator detonates the lead charge and the detonation of the lead charge.The initial pressure in simulating result and calculation result is almost identical,indicating that the calculation process to determine whether the detonator detonate the lead charge has reference value;the detonation in the lead charge can be reliably transmitted,verifying the detonation-transmitting performance of the double-L shaped micro detonation train.Verified the detonation-transmitting performance of the micro detonation train though experiment,The experimental results show that the micro detonation train can transmit detonation in the arming state and proof detonation in the detonation-proof state.Designed the restraint device of the MEMS S&A device and the detonation train.Integrated two parts into a size of 21mm(L)*15mm(W)*12mm(H)module.The adaptability of lead charge to fuze's launching environment was tested though experiment,results show that the lead charge was still capable of transmitting detonation after withstanding recoil and centrifugal force.