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Adaptive guidance and control of uncertain lunar landers in terminal landing phases

journal contribution
posted on 03.04.2020 by Liang Sun, Guang Sun, Jingjing Jiang
A novel double-loop guidance and control strategy for under-actuated lunar landers in terminal landing phases is developed by using adaptive nonlinear control approach in this study. To derive the main thrust input and inner-loop desired attitude trajectory, the outer-loop position tracking guidance law is firstly developed based on the hyperbolic tangent functions to guarantee the constrained thrust and singularity avoidance of the desired attitudes. Then, to avoid the complicated analytic-derivative computing of the desired attitude trajectory, a stable second-order filter is employed to generate the command attitude trajectory for the inner-loop attitude motion. Finally, an adaptive attitude tracking controller is designed by combining the barrier Lyapunove function and the backstepping technique to get rid of the singularities of the Euler angles-based attitude kinematic Jacobian matrix. In addition, tuning rules for designing parameters in guidance law and attitude controller are derived based on the Lyapunov analysis, and the pose tracking errors in the closed-loop system ultimately converge to the small neighborhoods of the origin. An example is simulated to verify the effectiveness of the proposed control design approach.

Funding

National Natural Science Foundation of China [grant number 61903025]

China Scholarship Council [grant number 201906465028]

Fundamental Research Funds for the Central Universities [grant numbers FRF-BD-19-002A and FRF-GF-18- 0028B].

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Mechanical Systems and Signal Processing

Volume

142

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Mechanical Systems and Signal Processing and the definitive published version is available at https://doi.org/10.1016/j.ymssp.2020.106763

Acceptance date

19/02/2020

Publication date

2020-03-19

Copyright date

2020

ISSN

0888-3270

Language

en

Depositor

Dr Jingjing Jiang Deposit date: 2 April 2020

Article number

106763

Exports