地面强激光操控空间碎片避碰的控制策略

发布时间：2018-05-02 04:57

本文选题：地基激光系统 + 控制策略　；参考：《红外与激光工程》2017年03期

【摘要】：日益增长的太空碎片为载人空间站和卫星带来严重的安全挑战。2011年,NASA提出使用地面连续激光照射空间碎片,利用其微弱的光压力效应,通过长期积累,改变其轨道,从而预防其与航天器可能的碰撞。这一碰撞避免方法并不把太空碎片拉回大气层内,而是防止碰撞,由于不需要航天器机动,且光压的温和作用也对激光器发射功率没有太高要求,因此这种避碰方法受到广泛关注。然而,该方法的提出者采用的迎面照射控制律尽管简单但非最优,故需要设计最优控制律。通过建立两点边值问题模型,以两物体之间距离的最大化为控制目标,求解了最优性条件。仿真显示,经优化后控制律的避碰效果提高程度非常显著,提高幅度与初轨有关,通常为25%~125%。
[Abstract]:The growing space debris poses a serious security challenge for manned space stations and satellites in.2011. NASA proposes to use the ground continuous laser to irradiate space debris and to use its weak light pressure effect to change its orbit by long-term accumulation to prevent its possible collision with the spacecraft. This collision avoidance method does not break the space. The film is pulled back into the atmosphere, but the collision is prevented. Because the spacecraft does not need the maneuver of the spacecraft, and the mild action of the light pressure is not too high for the laser emission power, this method of collision avoidance is widely concerned. However, the head-on control law adopted by the proposed method is simple but not optimal, so the optimal control law is needed. Through the establishment of a two point boundary value problem model, the optimal condition is solved by maximizing the distance between two objects. The simulation shows that the improved control law has a very significant improvement in the degree of collision avoidance, which is usually related to the initial orbit, usually 25%~125%..

【作者单位】：西安卫星测控中心宇航动力学国家重点实验室;
【基金】：国家高技术研究发展计划(2015AA07046101) 国家自然科学基金(11372150)
【分类号】：V528

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