Development of an active trailer differential braking system for car-trailer combinations

开发用于汽车-拖车组合的主动拖车差动制动系统

• 批准号: 483295-2015
• 负责人: He, Yuping
• 金额: $ 1.82万
• 依托单位: University of Ontario Institute of Technology
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=583449
• 关键词: Development; active; trailer; differential; braking

The objective of the project is to develop a conceptual design of active trailer differential braking (ATDB) systems for car-trailer combinations. Despite the safety increases provided by electronic stability control (ESC) systems, nearly all these devices are designed for single-unit vehicles and take no account of external loads, such as trailers. Car-trailer combinations exhibit reduced stability at high speeds due to their complex configurations. Compared with single-unit vehicles, car-trailer combinations show unique unstable motion modes, including jack-knifing, trailer swing, and roll-over. These unstable motion modes are the common causes for accidents occurring on highways. To date, the majority of trailers use passive mechanisms to enhance their stability at high speeds. Unfortunately, the high-speed stability of a car-trailer system cannot be guaranteed with a passive mechanism, because operating conditions vary significantly, such as the variation of trailer payload, forward speed, road conditions, etc. To enhance the performance of car-trailer combinations, General Motors of Canada Limited (GM) is researching new active safety systems for the vehicle systems. With expertise from the UOIT team, the active safety system will be designed using an innovative ATDB technique, which is built upon existing technologies of ESC for single-unit vehicles. Collaborating with the GM engineers, the UOIT team will: 1) perform numerical simulations to examine the direction performance of a typical GM passenger car with and without an embedded ESC system when it tows a conventional trailer; and 2) conduct a conceptual design of an ATDB system and evaluate the effectiveness of the safety device by numerical simulations. The research project will address the following issues for the ATDB system design: 1) finding effective ways to determine the threshold limit to actuate the ATDB system; 2) determining effective control strategies to prevent jack-knifing unstable motion mode; and 3) identifying the effects of existing ESC system embedded on a car on the stability of the resulting car-trailer system when the car is towing. The innovative research will lay a solid foundation to fabricate physical ATDB prototypes in the next project.

该项目的目的是开发用于汽车组合的主动拖车差速器制动（ATDB）系统的概念设计。尽管电子稳定控制系统（ESC）系统提供了安全性的提高，但几乎所有这些设备都是为单单元车辆而设计的，并且不考虑外部负载（例如拖车）。由于其复杂的配置，汽车拖车组合在高速下表现出降低的稳定性。与单个单元的车辆相比，汽车拖车组合显示出独特的不稳定运动模式，包括杰克旋转，拖车摆动和滚动。这些不稳定的运动模式是在高速公路上发生事故的常见原因。迄今为止，大多数拖车都使用被动机制来高速增强其稳定性。不幸的是，汽车拖车系统的高速稳定性不能 保证使用被动机制，因为操作条件有很大差异，例如拖车有效载荷，前进速度，道路状况等的变化，以增强汽车拖车组合的性能，加拿大有限公司（GM）正在研究车辆系统的新活动安全系统。借助UOIT团队的专业知识，主动安全系统将使用创新的ATDB技术设计，该技术建立在现有的单个单元汽车的现有技术基础上。与通用汽车工程师合作，UOIT团队将：1）执行数值模拟，以检查典型的GM乘用车的方向性能，当它带有嵌入式ESC系统时，它会拖延传统的拖车； 2）对ATDB系统进行概念设计，并通过数值模拟评估安全装置的有效性。研究项目将解决ATDB系统设计的以下问题：1） 寻找有效的方法来确定启动ATDB系统的阈值限制； 2）确定有效的控制策略，以防止千斤顶推动不稳定的运动模式； 3）确定嵌入在汽车上的现有ESC系统对汽车牵引时所得汽车拖车系统稳定性的影响。创新的研究将奠定坚实的基础，以在下一个项目中制造物理ATDB原型。