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

doi:10.3780/j.issn.1000-758X.2011.02.004

Abstract

Abstract: 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.

Key words: Lyapunov stability, Pinpoint soft landing, Sliding mode, Guidance, Lunar exploration

LIANG Dong, LIU Liang-Dong, HE Ying-Zi. Guidance Law for Lunar Pinpoint Soft LandingBased on Lyapunov Stability Theory[J]. Chinese Space Science and Technology, 2011, 31(2): 25-31.

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URL: https://journal26.magtechjournal.com/kjkxjs/EN/10.3780/j.issn.1000-758X.2011.02.004

https://journal26.magtechjournal.com/kjkxjs/EN/Y2011/V31/I2/25

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

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