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Communication Dans Un Congrès Année : 2014

Backup State Observer Based on Optic Flow Applied to Lunar Landing

Résumé

The observer presented in this paper, which was based on the use of three minimalistic bio-inspired Visual Motion Sensors (VMS) detecting Optic Flow (OF) cues, states was intended as a backup solution in the case of Inertial Measurement Unit (IMU) failure. Contrary to most previous Guidance Navigation and Control (GNC) solutions for planetary landing, which have involved a sensor suite including an IMU, an innovative strategy is presented here for estimating states without any need for inertial measurements, based solely on information about the relative velocity of the images of the surrounding environment. A Linear Parameter Varying (LPV) observer designed on a LPV system linearized around a reference trajectory, estimates: the ventral OF, the expansion OF and the local pitch angle. A previously developed observer was applied here to a larger class of nonlinear systems by making an ingenious change of variable. Simulations performed on a lunar landing scenario yielded satisfactory performance and showed the robustness of the OF based observer to initial uncertainties and measurement noise.
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Dates et versions

hal-01021322 , version 1 (09-07-2014)

Identifiants

  • HAL Id : hal-01021322 , version 1

Citer

Guillaume Sabiron, Laurent Burlion, Grégory Jonniaux, Erwan Kervendal, Eric Bornschlegl, et al.. Backup State Observer Based on Optic Flow Applied to Lunar Landing. IEEE/RSJ International Conference on Intelligent Robots and Systems, Sep 2014, Chicago, United States. ⟨hal-01021322⟩
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