Abstract: Based on an engineering case of rear suspension resonance occurring in a rear-drive new energy commercial vehicle operating on low-adhesion road surfaces, this paper investigates the phenomena of driving wheel slippage and periodic resonance. Utilizing vibration transfer path analysis principles and natural frequency identification techniques, the mechanism behind the vibration issue is revealed: it results from the coupling between the drive wheel hop frequency and the modal natural frequency of the rear suspension system, which excites rear suspension system resonance leading to whole-vehicle vibration. A traction control system (TCS) based on the anti-lock braking system (ABS) architecture is proposed. This system integrates the core control logic functions within a central control unit. System validation demonstrates the active intervention characteristics of the TCS during wide-open throttle acceleration, effectively suppressing excessive wheel slip and the resonance phenomenon. The research findings provide a new engineering application case for improving ride comfort and dynamic stability control of new energy commercial vehicles under low-adhesion road conditions.

Key words: resonance phenomenon; suspension mode; traction control; low-adhesion road surface

摘要： 针对新能源商用车在低附着系数路面大电门加速工况下出现的驱动轮打滑及周期性共 振现象，文章基于某后驱新能源商用车在低附着路面行驶时出现的后悬架共振工程案例，依 据振动传递路径分析原理及固有频率识别技术揭示了振动问题产生机理：驱动轮跳动频率与 后悬架系统模态固有频率产生耦合，激发后悬架系统共振导致整车振动问题。文章提出了一 种基于防抱死制动系统（ABS）架构的牵引力控制系统（TCS），该系统通过中央控制单元实 现核心控制逻辑的功能集成，系统验证了 TCS 在车辆全电门加速工况下的主动介入特性，有 效抑制车轮过度打滑共振现象。研究成果为新能源商用车在低附着路面条件下的行驶平顺性 与动态稳定性控制，提供了新的工程应用案例。

关键词: 共振现象；悬架模态；牵引力控制；低附着路面