Multi-power sliding mode guidance for Mars powered descent phase

Guo, Yanning, Zhang, Yao, Ma, Guangfu and Zeng, Tianyi (2016) Multi-power sliding mode guidance for Mars powered descent phase. Control 2016 - 11th International Conference on Control, Queen's University, Belfast, United Kingdom. 31 Aug - 02 Sep 2016.

Record type: Conference or Workshop Item (Paper)

Abstract

To reach and keep tracking the desired Mars landing trajectory rapidly under various uncertainties and unexpected wind, a power reaching law based sliding mode tracking guidance algorithm is proposed in this paper. The proposed guidance law is composed of three exponential terms, its main improvement is that it can ensure that the lander track the reference trajectory in finite time without chattering. Theoretical proofs are presented to prove its existence, reachability and stabilization characteristics. Compared with existing exponential reaching law, single power reaching law and double power reaching law, simulation results show the effectiveness of the proposed guidance law with a typical Mars powered descent landing scenario

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