Google Research

Evaluation of prioritized deep system identification on a path following task

  • Antoine Mahé
  • Antoine Richard
  • Stephanie Arravechia
  • Matthieu Geist
  • Cédric Pradalier
Journal of Intelligent & Robotic Systems (2021) (to appear)

Abstract

This paper revisits system identification and shows how new paradigms from machine learning can be used to improve it in the case of non-linear systems modeling from noisy and unbalanced dataset. We show that using importance sampling schemes in system identification can provide a significant performance boost in modeling, which is helpful to a predictive controller. The performance of the approach is first evaluated on simulated data of a USV. Our approach consistently outperforms baseline approaches on this dataset. Moreover we demonstrate the benefits of this identification methodology in a control setting. We use the model of the USV in a MPPI controller to perform a track following task. We discuss the influence of the controller parameters and show that the prioritized model outperform standard methods. Finally, we apply the MPPI on a real system using the know-how developed here.

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