メタ学習による学習済み車両ダイナミクスモデルのオンライン適応
Online Adaptation of Learned Vehicle Dynamics Model with Meta-Learning Approach
自動運転の限界域での車両ダイナミクスをニューラルネットで表現し、Continual-MAMLで未知環境にオンライン適応させる手法を提案。MPPI制御の追従性能が向上することを実機で示した。
著者: Yuki Tsuchiya, Thomas Balch, Paul Drews, Guy Rosman
分類: cs.RO
原文アブストラクト
We represent a vehicle dynamics model for autonomous driving near the limits of handling via a multi-layer neural network. Online adaptation is desirable in order to address unseen environments. However, the model needs to adapt to new environments without forgetting previously encountered ones. In this study, we apply Continual-MAML to overcome this difficulty. It enables the model to adapt to the previously encountered environments quickly and efficiently by starting updates from optimized initial parameters. We evaluate the impact of online model adaptation with respect to inference performance and impact on control performance of a model predictive path integral (MPPI) controller using the TRIKart platform. The neural network was pre-trained using driving data collected in our test environment, and experiments for online adaptation were executed on multiple different road conditions not contained in the training data. Empirical results show that the model using Continual-MAML outperforms the fixed model and the model using gradient descent in test set loss and online tracking performance of MPPI.
