Switching system model for pinpoint lunar landing guidance using a hybrid control strategy

Daniel R. Wibben, Roberto Furfaro, Ricardo G. Sanfelice

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

A novel non-linear spacecraft guidance scheme utilizing a hybrid controller for pinpoint lunar landing is presented. The development of this algorithm is motivated by a) the desire to satisfy more stringent landing accuracies required by future lunar mission architectures, and b) the interest in the ability of a system with multiple controllers to provide robustness and performance that cannot be obtained with a single controller. Based on Hybrid System theory, the proposed Hybrid Guidance algorithm utilizes both a global and local controller to bring the lander safely to the desired target on the lunar surface with zero velocity in a finite time. The hybrid approach is used generally to provide flexibility; many stable controllers can be used for the global and local controllers in the hybrid framework, creating options that allow the algorithm to be tailored to meet mission requirements. The presented case utilizes a global controller that implements an optimal guidance law augmented with a sliding mode to bring the lander from an initial state to a predetermined reference trajectory, at which point the guidance law will switch to that of a LQR-based local controller to bring the lander to the desired point on the lunar surface. The individual controllers are shown to be stable in their respective regions. The behavior and performance of the Hybrid Guidance Law (HGL) is examined in a set of Monte Carlo simulations under realistic conditions. The simulations demonstrate that the HGL is very accurate and results in low residual guidance errors.

Original languageEnglish (US)
Title of host publicationAIAA Guidance, Navigation, and Control Conference 2012
StatePublished - Dec 1 2012
EventAIAA Guidance, Navigation, and Control Conference 2012 - Minneapolis, MN, United States
Duration: Aug 13 2012Aug 16 2012

Publication series

NameAIAA Guidance, Navigation, and Control Conference 2012

Other

OtherAIAA Guidance, Navigation, and Control Conference 2012
CountryUnited States
CityMinneapolis, MN
Period8/13/128/16/12

ASJC Scopus subject areas

  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Wibben, D. R., Furfaro, R., & Sanfelice, R. G. (2012). Switching system model for pinpoint lunar landing guidance using a hybrid control strategy. In AIAA Guidance, Navigation, and Control Conference 2012 (AIAA Guidance, Navigation, and Control Conference 2012).