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首页> 外文期刊>Journal of Spacecraft and Rockets >Free-Molecule-Microresistojet Performance Using Water Propellant for Nanosatellite Applications
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Free-Molecule-Microresistojet Performance Using Water Propellant for Nanosatellite Applications

机译：纳米卫星应用使用水推进剂的自由分子微阻射性能

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摘要

Advances in microtechnology manufacturing and capability have led to an increased interest in micro- and nanosatellites. A propulsion system was designed to meet the on-orbit attitude control requirements for nanospacecraft. The free-molecule microresistojet, a low-cost, low-power, high propellant-storage density, and green propulsion system, was analyzed in this study to determine its ability to provide a slew maneuver for a typical 10-kg nanosatellite. Additionally, a free-molecule-microresistojet technology demonstrator was fabricated using traditional and microelectromechanical systems techniques. The technology demonstrator was analyzed and tested in this study to determine its performance characteristics when operating with water propellant. Experimental data show that the free-molecule microresistojet, with a heated wall temperature of 580 K. can attain a specific impulse of 79.2 s with a thrust level of 129 μN. For a given mass flow, higher thrust levels can be achieved by increasing the temperature of the free-molecule-microresistojet heater chip. The experimental results agree favorably with predicted values from kinetic theory. Applying the measured performance of the technology demonstrator to an optimized setup, the free-molecule-microresistojet system could provide a 45-deg slew of a typical nanosatellite in 60 s, which is acceptable for many nanosatellite applications.
机译：微技术制造和能力的进步导致人们对微卫星和纳米卫星的兴趣增加。设计了一种推进系统，以满足纳米航天器在轨姿态控制的要求。在这项研究中，对自由分子微阻射器（一种低成本，低功率，高推进剂存储密度和绿色推进系统）进行了分析，以确定其为典型的10千克纳米卫星提供压摆机动的能力。另外，使用传统的和微机电系统技术制造了自由分子微电阻喷射技术演示器。在本研究中对技术演示器进行了分析和测试，以确定与水推进剂一起使用时的性能特征。实验数据表明，加热壁温为580 K.的自由分子微电阻射流可获得79.2 s的比冲，推力水平为129μN。对于给定的质量流量，可以通过提高自由分子微电阻射流加热器芯片的温度来获得更高的推力水平。实验结果与动力学理论的预测值吻合良好。通过将技术演示器的测量性能应用于优化设置，自由分子微电阻喷射系统可以在60 s内提供典型纳米卫星的45度斜度，这对于许多纳米卫星应用都是可以接受的。

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