【摘要】 利用V形梁结构的双稳态跳转特性,设计了一种具有显著阈值特性的双稳态惯性开关,并建立了阻尼力、惯性力、弹性力及触点碰撞力等多力耦合作用下的开关动力学模型。开关结构主要由触点、弹性元件及其支撑的惯性质量块构成。动态仿真及实验结果表明开关具有良好的阈值特性。采用离心测试装置测得开关闭合阈值为9.6g,与设计值10g的偏差仅为4%,断开阈值为-3.1g,开关响应时间低于5ms,闭合后在零惯性力作用下仍能使开关保持闭合状态,验证了V形梁结构惯性开关设计理论的有效性和可行性,因而在航空、航天及汽车电子安全领域具有广阔的应用前景。更多还原

【Abstract】 A bistable inertial switch with V-shaped buckling beams is designed by utilizing the snap-through characteristic of the V-shaped beam, which mainly consists of the parallel V-shaped beams, contact point, and the inertial mass. The dynamic model of the inertial switch is established considering the effects of the coupled forces such as film-damping force, elastic force, inertial force, and contact force. The results of the simulation and experiments show that the switches have good threshold characteristics and auto-locking functions, which also demonstrates the feasibility and effectiveness of the theoretical design model. The experimental results also show that the threshold acceleration is 9.6g, which is only 4 percents different from the expected value. While the acceleration reaches the threshold value, the switch responses in less than 5 ms and will keep the close state until the cut-off threshold value is applied. Therefore, the V-shaped inertial switch shows attractive potential to be used in the systems of aircrafts and automotive safety systems.更多还原