New Synchronous Orbits Using the Geomagnetic Lorentz Force
New Synchronous Orbits Using the Geomagnetic Lorentz Force
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DOI：
10.2514/1.29080
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发表时间：
2006-08
影响因子：
2.6
通讯作者：
Brett J. Streetman;M. Peck
中科院分区：
文献类型：
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作者：
Brett J. Streetman;M. Peck
洛伦兹增强轨道概念提供无推进剂电磁推进，无需系绳，利用带静电的卫星与地球磁场之间的相互作用来提供有用的推力。新型地球同步轨道是从控制在轨道上受到洛伦兹力的卫星运动的方程中发现的。这种航天器的运动方程是根据简化的磁场模型导出的，其中偶极子与真北对齐。对于极轨卫星来说，恒定的电荷可以造成赤经角的任意变化。这种方法允许单轨道重复地面轨道低地球轨道卫星。通过极地和赤道情况的数值模拟验证了洛伦兹力引起的轨道元素变化的解析表达式。在赤道情况下，可以通过恒定的静电荷来操纵近地点的经度。近地点运动还允许创建地球同步类型的轨道。还检查了偶极场的情况，其中北极与真北不对齐。仅使用洛伦兹力进行驱动的反馈控制被证明可以稳定这种一般情况。
The Lorentz-augmented orbits concept provides propellantless electromagnetic propulsion without a tether, using the interaction between an electrostatically charged satellite and the Earth's magnetic field to provide a useful thrust. New types of Earth-synchronous orbits are found from equations governing the motion of satellites experiencing the Lorentz force in orbit. The equations of motion for such a spacecraft are derived based on a simplified magnetic field model, in which the dipole is aligned with true north. For a polar-orbiting satellite, a constant electrical charge can create arbitrary changes in the right-ascension angle. This method allows for single-orbit repeat-groundtrack low-Earth-orbit satellites. Analytical expressions for changes in orbital elements due to Lorentz forces are verified by numerical simulation for the polar and equatorial cases. In the equatorial case, manipulation of the longitude of perigee by constant electrostatic charge is possible. Perigee movement also allows for the creation of an Earth-synchronous type of orbit. The case of a dipole field, for which the north pole is not aligned with true north, is also examined. Feedback control using only the Lorentz force for actuation is shown to stabilize this general case.