Drag-based composite super-twisting sliding mode control law design for Mars entry guidance

作者：Zhao, Zhenhua; Yang, Jun^*; Li, Shihua; Guo, Lei

来源：Advances in Space Research, 2016, 57(12): 2508-2518.

DOI：10.1016/j.asr.2016.03.036

• Drag-based Mars entry guidance
• Composite super twisting sliding mode control
• Finite-time disturbance observer
• Mismatched disturbance

In this paper, the drag-based trajectory tracking guidance problem is investigated for Mars entry vehicle subject to uncertainties. A composite super twisting sliding mode control method based on finite-time disturbance observer is proposed for guidance law design. The proposed controller not only eliminates the effects of matched and mismatched disturbances due to uncertainties of atmospheric models and vehicle aerodynamics but also guarantees the continuity of control action. Numerical simulations are carried out on the basis of Mars Science Laboratory mission, where the results show that the proposed methods can improve the Mars entry guidance precision as compared with some existing guidance methods including PID and ADRC.

• 出版日期2016-6-15
• 单位东南大学; 北京航空航天大学