A Low-shock Separation Device Based on Shape Memory Alloy
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摘要:为了降低火工分离装置在作用过程中产生的爆炸冲击，提出了一种基于 NiTi 形状记忆合金（SMA）材料的火工分离装置，利用SMA材料在高温下回复原来形状时产生的恢复力为锁止、分离机构提供动力，并对锁止、分离机构及电点火器开展低冲击设计。功能性验证试验表明该火工分离装置在作用过程中产生的冲击加速度值为306g，远低于传统火工分离装置工作过程中的冲击加速度，实现了低冲击的目的。
Abstract:In order to reduce the explosion impact of the separation device in the process of action, a pyrotechnic separation device based on NiTi shape memory alloy（SMA）material was proposed. This device provided motivation for a locking separation mechanism by the restoring force, which was generated as the material returning to its original shape at high temperature. Meanwhile, the low shock designs on the locking separation mechanism and electric igniter were carried out. The functional test results show that the shock acceleration value generated by the designed device during the operation is 306g, which is far lower than that of the traditional pyrotechnical separation device, the requirement of low shock is satisfied.
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