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.

该项目的目标是开发用于汽车拖车组合的主动拖车差速制动（ATDB）系统的概念设计。尽管电子稳定控制 (ESC) 系统提高了安全性，但几乎所有这些设备都是为单体车辆设计的，并且不考虑外部负载，例如拖车。汽车-拖车组合由于其复杂的配置而在高速行驶时稳定性降低。与单体车辆相比，汽车拖车组合表现出独特的不稳定运动模式，包括折叠、拖车摆动和侧翻。这些不稳定的运动模式是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增强其高速稳定性。不幸的是，汽车拖车系统的高速稳定性无法 由于操作条件变化很大，例如拖车有效载荷、前进速度、道路条件等的变化，因此采用被动机制来保证。为了提高汽车与拖车组合的性能，加拿大通用汽车有限公司（GM）正在研究用于车辆系统的新型主动安全系统。凭借 UOIT 团队的专业知识，主动安全系统将采用创新的 ATDB 技术进行设计，该技术基于单车 ESC 的现有技术。 UOIT 团队与通用汽车工程师合作，将： 1) 进行数值模拟，检查带有或不带有嵌入式 ESC 系统的典型通用汽车乘用车在牵引传统拖车时的方向性能； 2）进行ATDB系统的概念设计并通过数值模拟评估安全装置的有效性。该研究项目将解决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，防止折刀不稳定运动模式； 3) 确定汽车牵引时嵌入汽车的现有 ESC 系统对所得汽车拖车系统稳定性的影响。这项创新研究将为下一个项目中制作物理ATDB原型奠定坚实的基础。