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

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