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Attitude dynamics and control of spacecraft using geomagnetic Lorentz force

机译:利用地磁洛伦兹对航天器的姿态动力学和控制   力

摘要

The attitude stabilization of a charged rigid spacecraft in Low Earth Orbit(LEO) using torques due to Lorentz force in pitch and roll directions isconsidered. A spacecraft that generates an electrostatic charge on its surfacein the Earth magnetic field will be subject to perturbations from Lorentzforce. The Lorentz force acting on an electrostatically charged spacecraft mayprovide a useful thrust for controlling a spacecraft's orientation. We assumethat the spacecraft is moving in the Earth's magnetic field in an ellipticalorbit under the effects of the gravitational, geomagnetic and Lorentz torques.The magnetic field of the Earth is modeled as a non-tilted dipole. A modelincorporating all Lorentz torques as a function of orbital elements has beendeveloped on the basis of electric and magnetic fields. The stability of thespacecraft orientation is investigated both analytically and numerically. Theexistence and stability of equilibrium positions is investigated for differentvalues of the charge to mass ratio ($\alpha^*$). Stable orbits are identifiedfor various values of $\alpha^*$. The main parameters for stabilization of thespacecraft are $\alpha^*$ and the difference between the components of themoment of inertia of spacecraft.
机译:考虑到在低地球轨道(LEO)中带电刚性航天器使用俯仰和侧倾方向上的洛伦兹力产生的扭矩来稳定姿态。宇宙飞船在地球磁场的表面上会产生静电,因此会受到洛伦兹force的干扰。作用在带静电的航天器上的洛伦兹力可为控制航天器的方向提供有用的推力。我们假设宇宙飞船在重力,地磁和洛伦兹转矩的作用下在椭圆轨道的地球磁场中移动,地球磁场被建模为非倾斜偶极子。在电场和磁场的基础上,已经建立了一个模型,该模型将所有洛伦兹转矩作为轨道元素的函数。通过分析和数值研究了航天器定向的稳定性。针对荷质比的不同值($ \ alpha ^ * $)研究了平衡位置的存在和稳定性。对于$ \ alpha ^ * $的各种值,确定了稳定的轨道。航天器稳定的主要参数是$ \ alpha ^ * $和航天器惯性矩分量之间的差。

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