Research on road and railway vehicle systems

公路、铁路车辆系统研究

• 批准号: 6153-2006
• 负责人: Ahmed, Waizuddin
• 金额: $ 1.38万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=333948
• 关键词: Research; road; railway; vehicle; systems

The proposed research focuses on fundamental and application through analytical and experimental research on road and railway vehicle systems. Some of the ongoing, recently initiated and proposed topics with potentials for practical application include:  Suspension systems and isolators using advance passive and semi-active concepts (including MR and ER dampers) to enhance the performance in terms of ride, handling and dynamic wheel loads, and conflict between ride and handling. Appropriate controller needs to be established for such dampers in specific applications;  Handling: The current practice in the design of steering system uses a fixed ratio for the angles of inner and outer wheels and is based on low speed maneuvers. The applicant proposes research to develop speed dependent adaptive steering system that will significantly improve the handling performance as well as will significantly enhance the noise reduction and life of pneumatic tires; Stability: A normalized measure of roll instability which is not a function of vehicle or operational parameter are being established through extensive simulation studies. The proposed research will investigate application potentials of the measures and develop open and closed loop control strategies for early warning and stability enhancement devices for long freight vehicles where the instability initiated at the rear end often remains undetected until too late; Sensors: Applicant proposes to continue his effort in dynamic studies of  MEMS towards development of sensors for road and railway vehicle systems; Wheel-rail contact and dynamic forces resulting from wheel-rail defects as well as flats and corrugation have been a major concern for railway industry both for main- tenance and safety. The research proposes fundamental re-examination of wheel-rail contact models capable of predicting Wheel- rail dynamics. The proposed research will develop a radial spring based wheel model with improved rail model to compare with Hertizan model and experimental data. The developed vehicle-track model will be uti- lized towards response identification for a given defect and the development of smart wheelset to enhance early detection and in-time maintenance of railway wheelsets.

拟议的研究重点是通过道路和铁路车辆系统的分析和实验研究来研究基础和应用。一些正在进行的、最近发起的和提议的具有实际应用潜力的主题包括：使用先进的被动和半主动概念（包括 MR 和 ER 阻尼器）的悬架系统和隔离器，以增强行驶、操控和动态车轮负载以及行驶和操控之间的冲突方面的性能。在具体应用中需要针对此类阻尼器建立合适的控制器；  操控性：目前转向系统的设计实践采用固定的内外轮角度比，并且以低速操纵为基础。申请人建议研究开发速度相关的自适应转向系统，该系统将显着提高操纵性能，并显着提高充气轮胎的降噪和寿命；稳定性：通过广泛的模拟研究，正在建立一种标准化的侧倾不稳定性测量方法，它不是车辆或操作参数的函数。拟议的研究将调查这些措施的应用潜力，并为长货运车辆的预警和稳定性增强装置开发开环和闭环控制策略，因为后端引发的不稳定往往直到为时已晚才被发现；传感器：申请人建议继续致力于 MEMS 的动态研究，以开发用于公路和铁路车辆系统的传感器；轮轨接触和轮轨缺陷以及扁平和波纹引起的动态力一直是铁路行业维护和安全的主要关注点。该研究建议对能够预测轮轨动力学的轮轨接触模型进行根本性的重新检验。该研究将开发一种基于径向弹簧的车轮模型，并改进轨道模型，以与 Hertizan 模型和实验数据进行比较。开发的车辆轨道模型将用于对给定缺陷的响应识别和智能轮对的开发，以增强铁路轮对的早期检测和及时维护。