接触を操る：単一軌道中心関節ロボットのための有限支持運動モデル
Steering Through Contact: A Finite-Support Motion Model for Single-Track Center-Articulated Robots
中心関節式車両の運動予測において、横滑り抵抗を考慮した有限支持二次モデルを提案し、実世界実験で従来モデルより高精度な予測を実現した。
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著者: Mohamed Dhia Ounally, Nicolas Samson, Mathis Turgeon-Roy, Veronica Vannini, Johann Laconte, François Pomerleau
分類: cs.RO
原文アブストラクト
Trajectory planning and control in field robotics rely on predicting how propulsion and steering affect vehicle motion when contact points undergo slip. For articulated vehicles, the point-contact kinematic model (PCK) accounts for the linkage geometry but neglects the rotational resistance distributed along the contacts. We propose a finite-support quadratic model (FSQ) for single-track, center-articulated vehicles that incorporates this resistance through a quasi-static balance of lateral slip. Our approach generalizes the standard PCK formulation by relaxing the contact-point assumption. An exact reduction of the quadratic slip cost to contact moments gives a compact closed-form solution for real-time prediction of lateral velocity and yaw rate. We evaluate the proposed method in real-world experiments across asphalt, grass, ice, and mixed routes, using more than 7 km of data. For five-second predictions, FSQ reduces the weighted median translation and yaw errors by 53.5% and 68.9%, respectively, relative to PCK.
