针对智能**电源管理系统对开关闭锁和断开的要求, 提出了一种长脉冲敏感型微加速度开关。该开关带有齿形结构的悬空质量块和齿形导杆, 通过质量块和导杆在运动过程中相互碰撞实现能量耗散, 从而具有在高幅值窄脉冲加速度作用下保持断开, 在低幅值长脉冲加速度作用下可靠闭锁的功能。介绍了开关结构和工作原理, 对开关进行了理论分析和有限元分析, 并对开关模型进行了简化。采用UV-LIGA技术制作了开关样机, 利用样机试验和有限元分析相结合的方法验证了开关的功能。有限元仿真结果表明, 该开关在3 000 g/3 ms半正弦加速度作用下可靠闭锁。旋转台离心试验显示, 开关的静态闭锁阈值为2 385.3 g~2 475.6 g。落锤冲击试验和有限元仿真结果均表明, 开关在15 000 g/03 ms半正弦加速度作用下没有闭锁。得到的结果表明该开关满足设计要求, 能够应用于对加速度脉宽有区分要求的场合。

A micro acceleration switch for long pulse sensitivity was proposed to meet the requirement of a power management system of intelligent weapons for switch latching/unlatching. The switch was designed by using a suspended mass with tooth-shaped structure and a tooth shape guide and the energy dissipation was realized by the mutual collision of the mass and tooth shape guide during the moving process. The switch could implement the unlatch under the high amplitude and narrow pulse width acceleration and the latch under the low amplitude and long pulse width acceleration reliably. The structure and working principle of the switch were introduced. Then, the theoretical analysis and finite element analysis(FEA) of the switch were carried out and its model was simplified. A prototype switch was prepared by UV-LIGA technology, and the functional properties of the switch were verified by the combination of FEA and prototype test. The FEA shows that the switch latches reliably under 3 000 g/3 ms half sine acceleration pulse. The centrifugal test result shows that the static latching threshold of switch is from 2 385.3 g to 2 475.6 g. The dropping shock test and FEA results show that the switch do not latch under 15 000 g/0.3 ms half-sine acceleration. These results demonstrate that the switch meets the design requirements and can be applied to the occasions where the pulse width is required to be distinguished.