微分可能なシャシー安全層による知的車両運動制御
A Differentiable Chassis Safety Layer for Intelligent Vehicle Motion Control
アクチュエータ制限やタイヤ力制約を逐次二次計画に組み込み、暗黙微分で時間的勾配を伝播させる微分可能な安全層を提案し、専門家模倣とリスク誘導学習で制御方針と安全性を両立させた。
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著者: Lu Xiong, Xuge Hu, Yufei Song, Weidong Liu, Chen Tang
分類: cs.RO
原文アブストラクト
Learning-based vehicle motion control requires coordination between diverse task objectives and state-dependent chassis safety constraints. Conventional cascaded architectures may compromise task performance when safety filters modify nominal commands independently of policy learning. This article proposes a differentiable chassis safety layer that modularly integrates task-oriented control with explicit physical constraints. Actuator limits, individual-tire force constraints, and vehicle handling envelopes are incorporated into sequential quadratic programs. Each projected command propagates the predicted vehicle dynamics and updates subsequent constraints, enabling temporal gradient coupling through implicit differentiation. A two-stage learning strategy combines expert imitation with risk-guided supervision and conditional intervention guidance to coordinate nominal control decisions with chassis safety constraints. Closed-loop evaluations under unseen scenarios, emergency maneuvers, and ablation studies demonstrate that the proposed method improves safety-performance coordination and exploits vehicle dynamic potential while maintaining handling stability.