arXiv:2601.06854cs.RO2026-01被引 2

新模型用微分方程模拟轮胎摩擦动态,更真实还原车辆转向时的细微晃动。

Semilinear single-track vehicle models with distributed tyre friction dynamics

  • 将轮胎接触过程建模为由偏微分方程描述的分布式系统
  • 可捕捉转向时的微小振荡与瞬态侧向响应
  • 适合研究车辆稳定性与控制器设计的学者

本文提出一类新型单轨车辆模型,通过分布式的瞬态轮胎动力学表征,同时考虑摩擦引起的非线性效应。核心是分布摩擦-鬃毛动力学(FrBD)模型,该模型统一并扩展了经典达尔(Dahl)和卢格雷(LuGre)模型,将滚动接触过程视为由半线性偏微分方程控制的分布式系统。该模型被系统性地集成到单轨车辆框架中,形成半线性常微分-偏微分耦合系统,捕捉车辆侧向运动与轮胎变形的交互。考虑两种变体:刚性胎体与柔性胎体,均具有紧凑的状态空间表示。严格证明了耦合系统的局部与全局适定性,凸显了分布式FrBD模型的耗散性与物理一致性。还提出了线性化方法,支持谱分析与传递函数推导,有助于控制器与观测器设计。数值仿真表明,该模型能有效捕捉微小摇晃振荡及先进转向操作下的瞬态侧向响应。该方法在物理基础、数学严谨性与计算可行性上均推进了车辆动力学建模的前沿,尤其适用于考虑摩擦受限情况下的横向动态建模。

原文摘要 · Abstract (English)

This paper introduces a novel family of single-track vehicle models that incorporate a distributed representation of transient tyre dynamics, whilst simultaneously accounting for nonlinear effects induced by friction. The core of the proposed framework is represented by the distributed Friction with Bristle Dynamics (FrBD) model, which unifies and extends classical formulations such as Dahl and LuGre by describing the rolling contact process as a spatially distributed system governed by semilinear partial differential equations (PDEs). This model is systematically integrated into a single-track vehicle framework, where the resulting semilinear ODE-PDE interconnection captures the interaction between lateral vehicle motion and tyre deformation. Two main variants are considered: one with rigid tyre carcass and another with flexible carcass, each admitting a compact state-space representation. Local and global well-posedness properties for the coupled system are established rigorously, highlighting the dissipative and physically consistent properties of the distributed FrBD model. A linearisation procedure is also presented, enabling spectral analysis and transfer function derivation, and potentially facilitating the synthesis of controllers and observers. Numerical simulations demonstrate the model's capability to capture micro-shimmy oscillations and transient lateral responses to advanced steering manoeuvres. The proposed formulation advances the state-of-the-art in vehicle dynamics modelling by providing a physically grounded, mathematically rigorous, and computationally tractable approach to incorporating transient tyre behaviour in lateral vehicle dynamics, when accounting for the effect of limited friction.

车辆动力学轮胎模型偏微分方程控制设计

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