Unified Propulsion System to Explore Near-Earth Asteroids by a 50 kg Spacecraft
Unified Propulsion System to Explore Near-Earth Asteroids by a 50 kg Spacecraft
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发表时间：
2014
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通讯作者：
H. Koizumi;T. Inagaki;Y. Kasagi;T. Naoi;Tomoyuki Hayashi;R. Funase;K. Komurasaki
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作者：
H. Koizumi;T. Inagaki;Y. Kasagi;T. Naoi;Tomoyuki Hayashi;R. Funase;K. Komurasaki
本研究提出了用于50公斤级航天器深空探测的微推进系统I-COUPS(离子推进器和冷气推进器联合推进系统)。I-Coups是离子推进器和冷气体推进器的统一推进系统，共享相同的氙气系统。它为航天器提供了高ΔV机动、大推力、短时间机动和8个推进器的反作用控制。使用2.5公斤的氙气，推进系统的总湿质量预计为9.5公斤。离子推进器的推力为30 0μN，比冲为10 0 0 S，功率为35 W；冷气推进器的推力为30 mN，比冲为24 S，功率为8 W。截至目前，i-Coups的结构和热模型顺利完成了研制和环境试验，其飞行模型正在研制和运行中。I-Coups计划安装在70公斤重的Procyon号航天器上，这是一种小型航天器，通过使用微推进系统来探索近地小行星。它计划于2014年底发射，作为H-IIA运载火箭的小型二次有效载荷。
In this study, the micropropulsion system I-COUPS (Ion Thruster and COld-gas Thruster Unified Propulsion System) is proposed for 50-kg-class spacecraft to explore the deep space. The I-COUPS is a unified propulsion system of ion thrusters and cold-gas thrusters by sharing the same xenon gas system. It provides the spacecraft with high ΔV maneuver, high thrust, short time maneuver, and reaction control by eight thrusters. The total wet mass of the propulsion system is expected to 9.5 kg with 2.5 kg xenon. The ion thruster has thrust of 300 μN and specific impulse of 1000 s by 35 W power consumption, and the cold-gas thruster has thrust of 30 mN and specific impulse of 24 s by 8 W power. Up to date, structural and thermal model of the I-COUPS finished the developments and environmental tests successfully, and its flight model is under developments and operations. The I-COUPS intended to be installed on the 70 kg spacecraft PROCYON, small space spacecraft to explore near-Earth asteroids by using a micropropulsion system. Its launch is scheduled at the end of 2014 as a small secondary payload by an H-IIA launch vehicle.