Description:
CRASH AVOIDANCE RESEARCH
Vehicle Dynamics Simulation
NHTSA PROJECT ENGINEER: Dr. Paul Grygier (pgrygier@nhtsa.dot.gov)
NHTSA PROJECT ENGINEER: Dr. Kamel Salaani (ksalaani@nhtsa.dot.gov)
Support for National Advanced Driving Simulator (NADS) Development
The National Advanced Driving Simulator (NADS), being built for NHTSA by TRW at the University of Iowa, will be the most sophisticated driving simulator in the world. It is an operator-in-the-loop high fidelity driving simulator. The NADS motion system will have nine degrees of freedom: a six degree-of-freedom hexapod will support the dome which will contain the vehicle and visual system; two degrees of freedom for large horizontal excursions; and a full yaw rotational degree of freedom between the hexapod and dome. The visual system will have a 360-degree field of view with sophisticated computer graphics capabilities. NADS will assist NHTSA, other federal agencies, and commercial organizations in enhancing human factors and crash avoidance research related to driver-vehicle-road interactions like driver impairment research, human factors research concerning driver workload and adaptation to emerging Intelligent Transportation System (ITS) equipment and technology, and to support regulations regarding automotive safety. A validated mathematical vehicle dynamics model and real-time simulation are prerequisites for performing this complicated task. VRTC's role is to develop and validate to a high degree of realism the vehicle dynamics computer simulation used within NADS. VRTC's staff is involved in the development of the vehicle handling models, the enhancement of the simulation code, and the validation of the simulation models via comparison with full-scale vehicle field experiments. VRTC is also responsible for developing parameter data sets representing the various vehicles that will eventually be used on the NADS. VRTC has measured the parameters of a 1994 Ford Taurus and has developed a simulation model of the Taurus. Experimental testing and verification of the Taurus simulation model have been completed. Additionally, measurements of the parameters of a 1997 Jeep Cherokee and a Volvo tractor and Fruehauf semitrailer has been completed. Simulation models of both these vehicles are currently under construction. Version 1.02 of the dynamics software is due for release in June.
Related Publications By VRTC
Salaani, M. K., Heydinger, G. J., "Powetrain and Brake Modeling of the 1994 Ford Taurus for the National Advanced Driving Simulator," SAE Paper 981190, February 1998. Garrott, W. R., Grygier, P. A., Chrstos, J. P., Heydinger, G. J., Salaani, M. K., Howe J. G., and Guenther, D. A., "Methodology for Validating the National Advanced Driving Simulator's Vehicle Dynamics (NADSdyna)," SAE Paper 970562, February 1997. Chrstos, J. P. and Grygier, P. A., "Experimental Testing of a 1994 Ford Taurus for NADSdyna Validation," SAE Paper 970563, February 1997. Salaani, M. K., Chrstos, J. P., and Guenther, D. A., "Parameter Measurement and Development of a NADSdyna Validation Data Set for a 1994 Ford Taurus," SAE Paper 970564, February 1997. Salaani, M. K., Heydinger, G. J., and Guenther, D. A., "Validation Results from Using NADSdyna Vehicle Dynamics Simulation," SAE Paper 970565, February 1997. Howe, J. G., Rupp, G., Woodburn, C., Jang, B.C., Heydinger, G. J., and Guenther, D. A., "Improving Steering Feel for the National Advanced Driving Simulator," SAE Paper 970567, February 1997. Salaani, M. K., "Development and Validation of a Vehicle Model for the National Advanced Driving Simulator," Ph.D. Dissertation, The Ohio State University, June 1996. Chrstos, J. P. and Grygier, P. A., "Instrumentation and Field Testing of 1994 Ford Taurus GL for NADSdyna Evaluation," (NHTSA Report in Progress). Salaani, M. K., "Vehicle Dynamics Modeling for the National Advanced Driving Simulator of a 1994 Ford Taurus GL," (NHTSA Report in Progress). Salaani, M. K. and Heydinger, G. J., "Vehicle Dynamics Evaluation for the National Advanced Driving Simulator of a 1994 Ford Taurus GL," (NHTSA Report in Progress).
OTHER WEB SITES ABOUT NADS
University of Iowa's NADS Web Site
NHTSA's NADS Web Site
Other NADS Web Sites |
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