Abstract: The paper focused on the design and experimental study of the special rim assembly, which consisted of the special rim, the elastomer and the special slip ring. Firstly, the functions of the intelligent tire development platform and the design requirements for the special rim assembly were clarified, and the structural design was carried out according to the requirements of air tightness, dynamic balance, safety, et al. Then, the finite element model of the special rim assembly was constructed based on ABAQUS software. A passenger car steering emergency braking condition was simulated and two times of the front wheel load was setup into the model. The strength and stiffness of the special rim met the design requirements. Finally, the 7075 aerospace aluminum alloy ingot materials were used for the overall processing of the special rim, and verification tests such as air tightness, dynamic balance and signal transmission were conducted. The tire pressure of the special rim assembly is set to 0.24 MPa and left for 5 days, but the tire pressure droppes only about 0.8%, so the air tightness is great. The special rim assembly was mounted on the Flat-trac bench for testing at different speeds, and the images of the slip ring stator end motion and the in-tire sensor output signals were collected simultaneously. The image sub-pixel matching method was used to obtain the displacement of the stator end of the slip ring. When the vehicle speed is as 50 km/h, the displacement is about 0.5712 mm, which meets the test requirements of the rim dynamic balance and slip ring. At different test speeds, the signals from multiple sensors inside the tire are output steadily through the special rim assembly, and the signals may effectively characterize the tire-road contact characteristics. The special rim assembly designed herein meets the requirements for building an intelligent tire development platform and provides an effective means to research on the tire-road contact mechanism.

Key words: intelligent tire, development platform, special rim assembly, integrated design, verification test

摘要： 针对专用轮辋总成进行了设计与试验研究，包括专用轮辋、弹性体和专用滑环三个主要部件。首先明确智能轮胎开发平台的功能及其对专用轮辋总成的设计要求，从气密性、动平衡、安全性等方面进行结构设计；然后用ABAQUS软件构建专用轮辋总成有限元模型，以某乘用车转向紧急制动工况前轮轮荷的2倍进行加载，专用轮辋强度和刚度校核满足要求。最后，采用7075航空铝合金锭材料对专用轮辋进行整体加工与气密性、动平衡和信号传输等验证试验。专用轮辋总成胎压为0.24 MPa时静置5天，胎压下降约0.8%，密封性良好；将专用轮辋总成安装在Flat Trac台架上进行不同车速的测试，同步采集滑环定子端运动图像和胎内传感器输出信号；利用图像亚像素匹配方法处理得到滑环定子端挠动量约0.5712 mm（车速50 km/h），满足轮辋动平衡和滑环使用条件；不同测试速度下胎内多个传感器信号通过专用轮辋总成实现稳定输出，信号能够有效表征轮胎接地特征。设计的专用轮辋总成满足智能轮胎开发平台的构建要求，为轮胎接地机理等研究提供了有效手段。

关键词: 智能轮胎, 开发平台, 专用轮辋总成, 集成设计, 验证试验