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To achieve the design goals of high performance and reliability of propulsion systems for attitude control in the future, study on the dynamic characteristics has important scientific and engineering value. The dynamic simulation method for the MMH/NTO dual component propulsion system for attitude control is studied based on AMESim software. Firstly, the dynamic models of each components are determined and their simulation modules are established based on the system scheme. Secondly, the simulation model of each component is built by the AMESim software and the simulation model of the whole system is established. Finally, the processes of tank pressurization and multi thrust chamber pulse and interactive working are simulated. The changes in key parameters like pressure and flow rate of the thrust chamber are analyzed and the modeling method is verified. Meanwhile, the stability of the check valve is analyzed. The influences of working parameters and structural parameters on the stability of the valves are discussed. The results indicate that the dynamic simulation model established in this study can be used to accurately simulate the processes of multi thrust chamber pulse interaction. The inlet pressure and the throttle area of the check valve have an obvious impact on the stability of the system. The dynamic simulation method can be used for dynamic characteristics and stability analysis, which can provide useful references for the system scheme design and dynamic characteristics study.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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