LOW-THRUST FLYBY GUIDANCE AND AN EXTENDED OPTIMAL SPACING RULE
LOW-THRUST FLYBY GUIDANCE AND AN EXTENDED OPTIMAL SPACING RULE
复制标题
低推力飞越引导和扩展的最佳间距规则
DOI：
10.2514/3.21625
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发表时间：
1996
影响因子：
2.6
通讯作者：
H. Matsuo
中科院分区：
文献类型：
--
作者：
J. Kawaguchi;H. Matsuo
本文提出了一种新的适用于电推进行星际飞行任务的中段修正点间距扩展律。使用电力推进不适合于引导飞越飞行任务，因为几乎没有时间引导航天器，特别是当航天器在目标的近距离内时。因此，航天器上不可避免地需要一些化学燃料。这里处理的问题是确定需要多少化学燃料来抵消潜在的电校正误差和脉冲校正误差。一个广义的间距规则，确定最佳的校正点的推导。此外，提出了一个简单的分析燃料估计。数值插图包括蒙特卡罗模拟以及从小行星返回地球的返回飞行，具有严格的星历和时间系统，展示了新开发的间距规则。nomaep =由电力推进加速c =滑行E[] =期望算子Epsxf -规定的终端脱靶距离容限j =时间节点k =校正时期n =校正节点的数量或时间索引的数量S =由电力推进加速的总速度增量T =到相遇的飞行周期T' =滑行弧OL的质心时间或结束时间。飞行时间比A V =脉冲修正速度增量A*/ =终端脱靶量S（A V）=脉冲修正机械化误差8$ =电修正机械化误差s =速度导航误差（标准差）
A new extended spacing law governing midcourse correction points is given for electrically propelled interplanetary missions. The use of electric propulsion is inappropriate for guidance of flyby missions because little time is available to guide the spacecraft, especially when it is within close range of the target. Therefore, some chemical fuel is inevitably required onboard the spacecraft. The problem treated here is to determine how much chemical fuel is required to cancel out the potential electric and impulsive correction errors. A generalized spacing rule that determines the optimal correction points is derived. In addition, a simple analytical fuel estimate is presented. Numerical illustrations include a Monte Carlo simulation as well as the return flight from the asteroid back to Earth with rigorous ephemerides and time system, demonstrating the newly developed spacing rule. Nomenclature aep = acceleration by the electric propulsion c = coasting E[] = expectation operator Epsxf - specified terminal miss distance allowance j = time node k = correction epochs n = number of correction nodes or the number of time index S = total velocity increment accelerated by the electric propulsion T = flight period to the encounter T' = centroid time or end time of the coasting arc OL - flight time ratio A V = impulsive correction velocity increment A*/ = terminal miss distance S(A V) = impulsive correction mechanization error 8$ = electric correction mechanization error s = velocity navigation error (standard deviation)