Experts on Tour - Ed Bedner
Vehicle Handling Stability and Responsiveness
Advanced chassis control systems enable a vehicle to achieve new levels of performance in handling stability and responsiveness. In recent work by NHTSA and others, the performance of Electronic Stability Control (ESC) systems has been studied with focus on yaw stability and roll stability of vehicles on high friction surfaces. However, it is recognized that vehicle handling responsiveness is also another important aspect that should be maintained. This paper explores the trade-offs between yaw rate, side slip, and roll motions of a vehicle, and their relationships to handling stability and handling responsiveness. This paper further describes how various control systems are able to manage these motions. The paper also discusses methods to assess vehicle stability and responsiveness using specific maneuvers and measurements, and it includes data from vehicle tests on a slippery surface.
Ed Bedner is a Principal Engineer of Vehicle Dynamics in the Electronics Integration Group of Autoliv. He is presently working to develop algorithms for estimation and control of vehicle motion for automotive safety system products. Ed has 23 years of experience in the auto industry, including 15 years of experience with Electronic Stability Control systems. He received a Master of Science degree in Electrical Engineering from The Ohio State University. Ed has 11 US patents, and he is a member of the Society of Automotive Engineers. His professional interests are vehicle dynamics, performance driving, active chassis control algorithms, and safety systems.