Abstract:

For missile ejecting power system with multi-gas generators， the normal way of solving the interior ballistic equations is assuming the design parameters， the number of generators and the ignition time of gas generators by experience， in order to make the interior ballistic parameters， such as the detached velocity， meet the index requirements. Once the setup of the gas generator parameters is unsuitable， the optimization solution is easily failed. A calculation method is proposed based on the interior ballistic target， such as missile detached velocity. The number， output flux and ignition time of multi-gas generators are calculated step by step. Finally the suitable propellant charge parameters and structure parameters of multi-gas generators are gained. The solution method was realized by programming using Matlab. The interior ballistic simulation for missile launching using different units of multi-gas generators was carried out. The parameters of multi-gas generators computed by this method can be used as the input of the later optimization of interior ballistic solution. The research can greatly support the initial interior ballistic design of missile launching power system.

Key words: multi-gas generators, interior ballistic, ejecting system, detached velocity, simulation, propellant charge

摘要：

针对采用多燃气发生器的弹射动力系统，按照常规的内弹道求解方法，需要根据经验对燃气发生器的设计参数、发生器的个数和点火时序进行多次调试，才能使导弹出筒速度等内弹道参数满足指标要求。一旦发生器参数初值设置不当，就会导致优化求解失败。建立了一种以导弹出筒速度等内弹道指标作为输入条件的反推计算方法，逐步递推出满足要求的多燃气发生器个数、流量、点火时序等，最终得到合适的多燃气发生器装药参数和结构参数。使用Matlab编程并求解，对不同个数燃气发生器组合的发射工况进行了内弹道仿真试验。以此方法得到多燃气发生器参数后，可以作为后续多燃气发生器内弹道优化的输入，该计算方法有利于多燃气发生器发射动力系统的内弹道初始设计。

关键词: 多燃气发生器, 内弹道, 弹射动力系统, 出筒速度, 仿真, 装药