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: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=389289
• 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对道路和铁路车辆系统的分析和实验研究来关注基础和应用，一些正在进行的、最近发起和提出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的悬架系统和隔离器。 （包括 MR 和 ER 减震器），以增强行驶、操控和动态车轮负载方面的性能，以及在特定应用中需要为此类减震器建立适当的控制器；​ 操控：当前的实践。设计转向系统的内轮和外轮的角度采用固定比率，并且基于低速操纵，申请人提出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增强降噪。充气轮胎的寿命和稳定性：通过广泛的模拟研究，正在建立一种与车辆或操作参数无关的标准化的侧倾不稳定性测量方法，并开发开环和闭环控制策略。用于长途货运的预警和稳定性增强装置后端引发的不稳定性往往直到为时已晚才被检测到：申请人建议继续致力于开发用于公路和铁路车辆系统的轮轨接触和动态力的传感器； -钢轨缺陷以及扁平和波纹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查。发展基于径向弹簧的车轮模型与改进的轨道模型相比，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，以增强早期检测和及时维护。铁路轮对。