| The orbit maneuvers propulsion system was primarily investigated by both theoretic analysis and numerical methods to study its dynamic characteristics and how much the performance of system was impacted by different system configurable parameters.Modules of basal subassembly were established to research the dynamic characteristics of pressure-fed propulsion system, and the conclusions of emulator sustained that the startup and closedown courses of the pressure-fed propulsion system were fast, and the fact that the system was jarless and credible, and, the moduls were all-purpose and logical, were also validared.The dynamic characteristics of differential pressurization system were investigated also, which sustained that the startup courses of the differential pressurization system was slow. Moreover, the differential pressurization system had a typical characteristic in frequency.Then, the changes in thrust, pressure of firebox and characteristics in frequency of the differential pressurization system which were begot by system parameters (such as the laryngeal diameter of firebox, parameters of difference pump, parameters of redactor and the unlock time of electromagnetic valve) were attentioned, hereby, the spring force of liquid redactor was deemed to be pivotal parameter to the thrust and the journey of piston in the difference pump was deemed to be pivotal parameter to the characteristics in frequency of differential pressurization system, and, an appropriate journey of piston in the difference pump could level off the run course of an engine with rated thrust. |
