月球精确软着陆李雅普诺夫稳定制导律  

Guidance Law for Lunar Pinpoint Soft Landing Based on Lyapunov Stability Theory

作　　者：梁栋[1,2] 刘良栋[1] 何英姿[1,2] 

机构地区：[1]北京控制工程研究所,北京100190 [2]空间智能控制技术国家级重点实验室,北京100190

出　　处：《中国空间科学技术》2011年第2期25-31,共7页Chinese Space Science and Technology

摘　　要：为实现在月球表面期望的着陆点进行精确软着陆,以月球精确软着陆三维球体非线性轨道动力学模型为基础,采用李雅普诺夫直接法,构造了基于能量的李雅普诺夫函数,设计了跟踪收敛滑动模态的精确制导律,并通过李雅普诺夫稳定性理论证明了该制导控制律的全局指数稳定性,给出矢量推力实现方法。仿真表明,该制导方法能够满足月球精确软着陆的需要。To achieve the pinpoint soft landing on a target landing site of the lunar surface,a globally exponentially stable guidance method for lunar pinpoint soft landing was studied by the 3-D spherical nonlinear orbit dynamics model.Based on Lyapunov direct method,a pinpoint guidance law tracking convergent sliding mode was designed.It was theoretically proved that the guidance law was globally exponentially stable by using Lyapunov stability theory.The numerical simulation results show that this guidance method can meet the need of lunar pinpoint soft landing.

关 键 词：李雅普诺夫稳定 精确软着陆 滑动模态 制导 月球探测 

分 类 号：V525[航空宇航科学与技术—人机与环境工程]