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MULTI-OBJECTIVE ONLINE INITIALIZATION OF SPACECRAFT FORMATIONS

机译:航天器形成的多目标在线初始化

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This paper extends a previously developed method for finding spacecraft initial conditions (ICs) that minimize the drift resulting from J2 disturbances while also minimizing the fuel required to attain those ICs. It generalizes the single spacecraft optimization to a formation-wide optimization valid for an arbitrary number of vehicles. Additionally, the desired locations of the spacecraft, separate from the starting location, can be specified, either with respect to a reference orbit, or relative to the other spacecraft in the formation. The three objectives (minimize drift, minimize fuel, and maintain a geometric template) are expressed as competing costs in a linear optimization, and are traded against one another through the use of scalar weights. By carefully selecting these weights and re-initializing the formation at regular intervals, a closed-loop, formation-wide control system is created. This control system can be used to reconfigure the formations on the fly, and creates fuel-efficient plans by placing the spacecraft in semi-invariant orbits. The overall approach is demonstrated through nonlinear simulations for two formations - a GEO orbit, and an elliptical orbit.
机译:本文扩展了先前开发的用于查找航天器初始条件(IC)的方法,该方法最小化J2干扰导致的漂移,同时还最小化了获得达到这些IC所需的燃料。它概括了单个航天器优化对形成范围内的优化,适用于任意数量的车辆。另外,可以指定与起始位置分开的航天器的所需位置,或者可以相对于参考轨道或相对于形成中的其他航天器指定。三个目标(最小化漂移,最小化燃料和维持几何模板)被表示为线性优化中的竞争成本,并且通过使用标量权重彼此交易。通过仔细选择这些权重并以规则的间隔重新初始化形成,创建闭环,形成范围的控制系统。该控制系统可用于在飞行中重新配置地层,并通过将航天器放置在半不变轨道上来创造燃料有效的计划。通过两个地层的非线性模拟来证明整体方法 - 地理轨道和椭圆轨道。

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