论文部分内容阅读
燃气流量可控的固体火箭冲压发动机促进了其燃气流量控制系统的研究。模型研究是控制系统设计的基础。基于集中参数的思想建立了燃气流量可控的固体火箭冲压发动机动态模型,分析了固体火箭冲压发动机动态模型参数的物理意义及其工作过程中的变参数特性,固体火箭冲压发动机动态响应时间由冷区容积时间常数、热区容积时间常数、激波传播时间常数和激波容积时间常数等组成,工作条件的较大变化使得固体火箭冲压发动机在工作过程中具有较强的变参数特性。最后对固体火箭冲压发动机动态模型进行模型降阶,由频率分析的结果可知,模型降阶是合理的。
A solid rocket ramjet engine with gas flow control facilitates its gas flow control system. Model research is the basis of control system design. Based on the idea of concentration parameters, the dynamic model of solid rocket ramjet with gas flow control was established. The physical meaning of dynamic model parameters of solid rocket ramjet engine and the variable parameters in its working process were analyzed. The dynamic response time of solid rocket ramjet engine was changed from cold Time constant of zone volume, time constant of volume of hot zone, time constant of shock wave propagation and time constant of shock volume. The large variation of working conditions makes the solid rocket ramjet have strong variable parameters in the working process. Finally, the dynamic reduction model of the solid rocket ramjet engine is reduced. From the result of the frequency analysis, the model reduction is reasonable.