变轨动力系统动态特性仿真与分析
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摘要
本文以空间变轨动力系统为研究对象,采用理论分析与数值模拟相结合的方法,对变轨动力系统动态特性以及影响系统性能的因素进行了详细的研究分析。
基于对变轨动力系统基本组件的模块化建模,研究了挤压式变轨动力系统的动态特性。研究发现挤压式系统启动和关机过程迅速,仿真结果验证了挤压式系统工况稳定可靠,所建立的组件模块合理,通用性强。
论文对差动式变轨动力系统动态特性进行了仿真研究分析。研究发现差动式系统启动过程缓慢,系统工作具有典型的自生管路频率特性。
考察了差动泵结构参数、燃气发生器喉部直径、电磁阀开启时间及液体减压器结构参数等对差动式系统发动机推力、燃气发生器室压以及系统频率变化的影响。研究发现:液体减压器弹簧预紧力大小是影响发动机推力大小的关键参数;同时差动泵活塞行程是影响系统频率的关键参数。对于一定推力量级的差动式系统,合适的活塞行程大小能够使发动机工作推力更加平稳。
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.
基于对变轨动力系统基本组件的模块化建模,研究了挤压式变轨动力系统的动态特性。研究发现挤压式系统启动和关机过程迅速,仿真结果验证了挤压式系统工况稳定可靠,所建立的组件模块合理,通用性强。
论文对差动式变轨动力系统动态特性进行了仿真研究分析。研究发现差动式系统启动过程缓慢,系统工作具有典型的自生管路频率特性。
考察了差动泵结构参数、燃气发生器喉部直径、电磁阀开启时间及液体减压器结构参数等对差动式系统发动机推力、燃气发生器室压以及系统频率变化的影响。研究发现:液体减压器弹簧预紧力大小是影响发动机推力大小的关键参数;同时差动泵活塞行程是影响系统频率的关键参数。对于一定推力量级的差动式系统,合适的活塞行程大小能够使发动机工作推力更加平稳。
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.
引文
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