单点三脉冲推冲器感应点火影响因素研究

单点三脉冲推冲器是在逻辑点火电路作用下有序地引燃三个点火具,实现对弹体的三次弹道修正。从主装药量、膜片厚度和燃烧室体积三方面对点火具间发生感应点火的影响因素进行了分析,增加主装药量有利于提高输出性能,但主装药量过大容易引起感应点火,取175～200mg为宜;增大膜片厚度可以有效防止感应点火,但膜片厚度过大会导致能量损失过大,取0.3mm为宜;增大燃烧室体积可以有效防止感应点火,但燃烧室体积过大会增大推冲器整体尺寸,取3.7mL为宜。

Factors Affecting Sympathetic Ignition of Three-impulse-at-one-spot Thruster

Three-impulse-at-one-spot thruster is a device which initiates three igniters by logic igniting circuit, and achieves trajectory correction for various flight vehicles. The effects of different main charge amounts, thickness of sealing film and combustion chamber volume on sympathetic ignition of the igniters were analyzed. Results show that output performance improves by increasing main charge amount while sympathetic ignition taking place after excessive charge,so 175-200 mg charge amount is suggested. The sympathetic ignition is effectively prevented by increasing thickness of sealing film while excessive thickness brings too much energy loss, so 0.3 mm thickness of sealing film is suggested. The sympathetic ignition is effectively prevented by increasing combustion chamber volume while too large volume will result in excessive whole dimension, so 3.7 mL chamber volume is suggested.