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Understanding the Limitations of Different Vehicle Models for Roll Dynamics Studies and Suspension P
Vehicle Dynamics and Control Seminar
일시 2006년 8월 3일 (목) 11:00~12:00
장소: 서울대 기계항공공학부 세미나실 301-1512호
연사: 심태현 교수 (University of Michigan-Dearborn)
Understanding the Limitations of Different Vehicle Models for Roll Dynamics Studies and Suspension Properties on Vehicle Roll Stability
Taehyun Shim
Department of Mechanical Engineering
University of Michigan-Dearborn
With the growing popularity of sport utility vehicles (SUVs) and the increasing number of rollover accidents in SUV’s, as well as trucks and buses, the reduction of vehicle rollover propensity has been an active research area in recent years. Research on such rollover prevention systems can be categorized into two basic types: passive systems (e.g. curve speed warning systems) and active systems (e.g. roll stability control). In the development of active/passive roll control systems, a vehicle model that can represent realistic roll behavior is essential to predict impending rollover as well as accurately applying the actuation force to avoid vehicle rollover. Many different vehicle models have been developed for use in various vehicle control systems. The complexity of these models and the assumptions made in their development depend on their application. This presentation looks into the development and validity of vehicle models for prediction of roll behavior and their suitability for application in roll control systems. A 14 DOF vehicle model that includes dynamics of roll center and nonlinear effects due to vehicle geometry changes is developed. The limitations, validity of simplified equations, and various modeling assumptions are discussed by analyzing their effect on the model roll responses in various vehicle maneuvers. In addition, the effects of suspension design parameters on vehicle roll response will be discussed using a multi-body vehicle dynamics program. Critical suspension design parameters for vehicle roll dynamics were identified and adjusted to improve roll stability of the vehicle model with passive suspension. This approach provides a viable alternative to costlier active control systems for economy class vehicles.
문의처: 880-1941 이 경 수 (kyi@snu.ac.kr)
일시 2006년 8월 3일 (목) 11:00~12:00
장소: 서울대 기계항공공학부 세미나실 301-1512호
연사: 심태현 교수 (University of Michigan-Dearborn)
Understanding the Limitations of Different Vehicle Models for Roll Dynamics Studies and Suspension Properties on Vehicle Roll Stability
Taehyun Shim
Department of Mechanical Engineering
University of Michigan-Dearborn
With the growing popularity of sport utility vehicles (SUVs) and the increasing number of rollover accidents in SUV’s, as well as trucks and buses, the reduction of vehicle rollover propensity has been an active research area in recent years. Research on such rollover prevention systems can be categorized into two basic types: passive systems (e.g. curve speed warning systems) and active systems (e.g. roll stability control). In the development of active/passive roll control systems, a vehicle model that can represent realistic roll behavior is essential to predict impending rollover as well as accurately applying the actuation force to avoid vehicle rollover. Many different vehicle models have been developed for use in various vehicle control systems. The complexity of these models and the assumptions made in their development depend on their application. This presentation looks into the development and validity of vehicle models for prediction of roll behavior and their suitability for application in roll control systems. A 14 DOF vehicle model that includes dynamics of roll center and nonlinear effects due to vehicle geometry changes is developed. The limitations, validity of simplified equations, and various modeling assumptions are discussed by analyzing their effect on the model roll responses in various vehicle maneuvers. In addition, the effects of suspension design parameters on vehicle roll response will be discussed using a multi-body vehicle dynamics program. Critical suspension design parameters for vehicle roll dynamics were identified and adjusted to improve roll stability of the vehicle model with passive suspension. This approach provides a viable alternative to costlier active control systems for economy class vehicles.
문의처: 880-1941 이 경 수 (kyi@snu.ac.kr)