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 

机构地区：[1]State Key Laboratory for Manufacturing Systems Engineering,Xi'an Jiaotong University,Xi'an,710049,China [2]Science and Technology on Applied Physical Chemistry Laboratory,Shaanxi Applied Physical Chemistry Research Institute,Xi'an,710061,China

出　　处：《Defence Technology（防务技术）》2022年第11期2034-2044,共11页Defence Technology

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

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.

关 键 词：MEMS PYROTECHNICS Safety and arming device INITIATOR Electro-thermal actuator 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程]