Research on a MEMS pyrotechnic with a double-layer barrier safety and arming device

作     者：Ke-xin Wang Teng-jiang Hu Yu-long Zhao Wei Ren Ke-xin Wang;Teng-jiang Hu;Yu-long Zhao;Wei Ren

作者机构：State Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'an710049China Science and Technology on Applied Physical Chemistry LaboratoryShaanxi Applied Physical Chemistry Research InstituteXi'an710061China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2022年第18卷第11期

页      面：2034-2044页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 0826[工学-兵器科学与技术] 082603[工学-火炮、自动武器与弹药工程] 0811[工学-控制科学与工程] 

基　　金：the National Key R&D Program of China(2017YFB1102900) the Fundamental Research Funds for the Central Universities(xzy012019004). 

主　　题：MEMS Pyrotechnics Safety and arming device Initiator Electro-thermal actuator 

摘      要：As an essential component of ammunition, pyrotechnics can control ignition with high reliability.However, due to limits of fabrication technology, traditional pyrotechnics are bulky. To achieve both functionality and miniaturization, MEMS pyrotechnics integrate initiator, safety-and-arming(S&A) device and lead charge and keep all components within a small size. MEMS S&A devices, as the core component to ensure system safety, are difficult to achieve active and rapid response to control signals with high safety and reliability. In order to overcome the difficulty, we propose the design and characterization of a MEMS pyrotechnic with a double-layer barrier S&A device. The MEMS pyrotechnic is a high-integrated device with an overall size of 13.4 × 8.5 × 5.2 mm^(3). The initiator is a Ni Cr bridge foil covered with an Al/Cu O energetic film, which can generate flame when ignited by an excitation voltage.To match the flame energy, lead styphnate is chosen in this study as the lead charge. The S&A device contains four semi-circular barriers, which are directly driven by V-shape electro-thermal actuators to gain active control of the pyrotechnics’ ignition condition with rapid response. To improve the system’s reliability, the four barriers are axisymmetrically placed in two layers, two barriers for each layer, to constitute a double-layer structure with a thickness of 100 μm. The ignition test results show that the S&A device can prevent the initiator from detonating the lead charge in safety condition. In arming condition, the lead charge will be detonated.