Abstract Poor ride comfort is one of the drawbacks of in-wheel-drive electric vehicles (IWD-EVs). Structural schemes of the in-wheel powertrain system combining dynamic vibration absorber (IWP-DVA) can be applied to improve the ride comfort performance of the IWD-EVs without excessive useless weight. In this scheme, the in-wheel-drive motor is suspended as a mass block, thereby a dynamic vibration absorber (DVA) is mounted on the unsprung mass to absorb the vibration. This study developed a novel IWP-DVA involving a pair of symmetrical external-geared-slider-rocker (EGSR) mechanisms and a differential gear mechanism. In this paper, the novel IWP-DVA’s effectiveness in preventing the driving torque and the mass block’s travel from interacting was verified based on the static analysis of the single-EGSR mechanism, where the negative phenomena of stroke depletion due to the driving torque exists. For investigating the ride comfort responses and tuning the spring/damper parameters, a dynamics model of a quarter vehicle system equipped with the novel IWP-DVA was constructed by using screw theory and Lagrange method. After the selection of the DVA parameters, an analysis of the results of ride comfort tests showed that the novel IWP-DVA could improve the ride comfort with a sufficient stroke.

中文翻译：

---

结合动态吸振器的新型轮内动力系统动力学分析

摘要 乘坐舒适性差是轮毂驱动电动汽车 (IWD-EV) 的缺点之一。结合动态减振器（IWP-DVA）的轮内动力总成系统的结构方案可用于提高IWD-EV的乘坐舒适性，而不会产生过多的无用重量。在该方案中，轮毂驱动电机作为质量块悬挂，从而动态吸振器（DVA）安装在非簧载质量上以吸收振动。本研究开发了一种新型 IWP-DVA，涉及一对对称的外齿轮滑块摇杆 (EGSR) 机构和一个差速齿轮机构。在本文中，基于单 EGSR 机构的静态分析，验证了新型 IWP-DVA 在防止驱动扭矩和质量块行程相互作用方面的有效性，其中存在因驱动扭矩而导致行程损耗的负面现象。为了研究乘坐舒适性响应和调整弹簧/阻尼器参数，使用螺旋理论和拉格朗日方法构建了配备新型 IWP-DVA 的四分之一车辆系统的动力学模型。选定DVA参数后，对乘坐舒适性测试结果的分析表明，新型IWP-DVA可以在足够的行程下提高乘坐舒适性。