The dual-motor coupling drive system (DCDS), which is widely used in electric vehicles, has attracted increasing attention due to its high transmission efficiency and economical fuel consumption. Current research has mainly focused on the control scheme of dual motors and has ignored the dynamic characteristics of the asymmetrical transmission structure. This paper presents an investigation of a dynamic model and an analysis method of the transmission process for the DCDS. The entire dynamic model of the DCDS was established by considering the planetary gear, differential bevel gear, and drive shaft with the transfer matrix method (TMM). Then, a detailed theoretical analysis was developed to study the influence of meshing stiffness and excitation source on the dynamic characteristics. Finally, the DCDS experimental platform was utilized to validate the effectiveness of the proposed dynamic model. For susceptibility to low-frequency vibrations, the first four natural frequencies and vibration modes of the DCDS were analyzed through the processing and analysis of acceleration signals. The experimental dynamic responses were generally consistent with the numerically computed results, which demonstrates the effectiveness of the proposed dynamic model with TMM. Furthermore, the proposed dynamic analysis method may be helpful for developing effective control algorithms to suppress vibrations and achieving highly smooth motions for electric vehicles.

中文翻译：

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双电机联轴器传动系统传动过程动力学建模及振动特性分析

广泛应用于电动汽车的双电机耦合驱动系统（DCDS）由于其传动效率高、油耗经济等特点越来越受到人们的关注。目前的研究主要集中在双电机的控制方案上，忽略了非对称传动结构的动态特性。本文介绍了对 DCDS 传输过程的动态模型和分析方法的研究。DCDS 的整个动力学模型是通过考虑行星齿轮、差速锥齿轮和驱动轴用传递矩阵方法 (TMM) 建立的。然后，进行了详细的理论分析，以研究啮合刚度和激励源对动力学特性的影响。最后，DCDS实验平台被用来验证所提出的动态模型的有效性。针对低频振动的敏感性，通过对加速度信号的处理和分析，分析了DCDS的前四个固有频率和振动模式。实验动态响应与数值计算结果基本一致，这证明了所提出的动态模型与 TMM 的有效性。此外，所提出的动态分析方法可能有助于开发有效的控制算法以抑制振动并实现电动汽车的高度平滑运动。通过对加速度信号的处理和分析，分析了DCDS的前四种固有频率和振动模式。实验动态响应与数值计算结果基本一致，这证明了所提出的动态模型与 TMM 的有效性。此外，所提出的动态分析方法可能有助于开发有效的控制算法以抑制振动并实现电动汽车的高度平滑运动。通过对加速度信号的处理和分析，分析了DCDS的前四种固有频率和振动模式。实验动态响应与数值计算结果基本一致，这证明了所提出的动态模型与 TMM 的有效性。此外，所提出的动态分析方法可能有助于开发有效的控制算法以抑制振动并实现电动汽车的高度平滑运动。