Vehicle Terrain Performance Laboratory

ferris_bio

Department of Mechanical Engineering
Blacksburg, VA 24061
540-231-4797

John B. Ferris, Ph.D.

Director, Vehicle Terrain Performance Laboratory
VTPL Mission and Strategy:

The Mission of the Vehicle Terrain Performance Laboratory (VTPL) is to improve vehicle performance by studying the interactions between ground vehicle systems and the terrain surface.  Our mission is pursued through research in four broadly classified Areas of Expertise: Terrain Measurement, Terrain Modeling, Vehicle Modeling, and Performance Prediction.

  • Overview

    The Vehicle Terrain Performance Lab (VTPL) has adopted a holistic approach toward its research, investigating all aspects of vehicle-terrain interactions, and using a broad range of measurement, analysis, and modeling tools.  This approach allows the researchers to broaden their expertise while gaining a deeper understanding of the fundamental issues that are involved in improving vehicle system performance.

    The vehicles being studied include passenger cars and trucks, commercial vehicles, military vehicles, motorcycles, and more.  Critical components of the vehicle system are studied in detail: tires, dampers, and other chassis and steering components.  Racetracks, proving grounds, highways, residential streets, and off-road trails are all important terrain to be studied.  Understanding how the terrain and the vehicle interact to affect performance is the founding research goal of the lab.

    Understanding the vehicle responses resulting from a vehicle traversing terrain is critical in predicting and improving vehicle system performance.  This requires a thorough understanding of tire dynamics, chassis design, and vehicle dynamics, and the ability to accurately model these dynamics.  Vehicle performance includes the prediction of objective metrics for handling, chassis durability and reliability, and the development of durability testing schedules.  Performance can also be the subjective perception of a passenger when traveling in a vehicle; in which case haptics, bio-dynamics, and psychometrics are crucial.


  • Areas of Expertise

    Terrain Measurement
    Terrain surface measurements are achieved using the Vehicle Terrain Measurement System (VTMS).  The VTMS is a state-of-the-art test bed for integrating technologies from different disciplines, allowing researchers to validate their theoretical and computation work with experimental data.  The system is capable of scanning the complete topology of the terrain surface, in 3 dimensions, while simultaneously tracking the position, orientation, and speed of the vehicle.  The VTMS provides millimeter the precision required for high-fidelity vehicle simulations for validation of vehicle and tire models, tuning of chassis components, and performance predictions.

    Terrain Modeling
    Stochastic models are developed to characterize terrain surfaces and describe their physical characteristics.  The ability to characterize terrain is critical for pavement health monitoring and durability test schedule development, for example.  These mathematical models are also used to create synthetic terrain surfaces.  The synthetic terrain is used whenever it is impractical to simulate very long test sections, or when simulating terrain variations that exist in the real operating conditions is important.  Auto-Regressive models, Markov Chains, Hidden Markov Models, Wavelets, Kriging, and Morphological filtering are in development.

    Vehicle Modeling
    The VTPL performs empirical and analytical modeling of the vehicle and tire.  Nonlinear multi-body dynamic models are developed to understand the vehicle responses to the terrain.  Tires are tested to determine nonlinear characteristics, such as the enveloping properties, and models are developed based on these empirical results.  For example, characteristic constraint modes are used to capture tire deformations, with the resulting modes used in a nonlinear model to predict loading.

    Performance Prediction
    The VTPL applies its expertise in terrain measurement and modeling, and vehicle and component modeling, to improve vehicle system performance.  Improvements can be made to ride and handling metrics, durability test schedules, and subjective performance metrics.  Psychometric studies quantifying the perceptions and preferences of drivers to subjective performance metrics such as ride quality have been conducted.  The comprehensive suite of measurement, analysis, and modeling tools and expertise – developed by the VTPL – results in accurate predictions of a vehicle’s performance early in the development cycle enables better-informed, less-costly, and more product-focused design decisions that ultimately lead to better vehicles, tires and roads.


  • Papers in Refereed Journals

    Papers in Refereed Journals

    • Zamora Alvarez, E. J., Ferris, J. B., Scott, D., Horn, E., 2016, “Development of a Discrete Roughness Index for Longitudinal Road Profiles”, International Journal of Pavement Engineering, p. 1 – 10, DOI: 10.1080/10298436.2016.1237180.
    • Ma, R., Chin, P., Ferris, J.B., Cheng, C. Neisen, E., Reid, A., 2015. “The Development of Terrain Pre-filtering Technique based on Constraint Mode Tire Model,” SAE Int. J. Passeng. Cars – Mech. Syst. 8(3):1151-1159, 2015, doi:10.4271/2015-01-9113.
    • Ma, R., Ferris, J.B., Reid, A., Gorsich, D., 2015, “A planar quasi-static constraint mode tire model”, Vehicle System Dynamics, Vol. 53, No. 12, pp. 1759-1771, DOI: 10.1080/00423114.2015.1088161.
    • Cho, S., Bandy, R., Ferris, J.B., Schlinkheider, J. Wimmershoff, M., 2014, “Location-Aware Adaptive Vehicle Dynamics System: Brake Modulation,” SAE Int. J. Passeng. Cars – Mech. Syst., Vol. 7, No. 2, April 2014, (doi:10.4271/2014-01-0079).
    • Cho, S., Bandy, R., Ferris, J.B., Schlinkheider, J. Wimmershoff, M., “Location-Aware Adaptive Vehicle Dynamics System: Throttle Modulation,” SAE Int. J. Passeng. Cars – Mech. Syst., Vol. 7, No. 1, April 2014, (doi:10.4271/2014-01-0105).
    • Bandy, R., Cho, S., Matthews, C., Celli, J., Binns, R., Ferris, J.B., Schlinkheider, J., Wimmershoff, M., 2014. “Location-Aware Adaptive Vehicle Dynamics System: Concept Development,” SAE Int. J. Passeng. Cars – Mech. Syst., Vol. 7, No. 1, April 2014, (doi:10.4271/2014-01-0121).
    • Taheri, S., Sandu, C., Ahmadian, M., Furukawa, T., Ferris, J.B., Batur, C., 2014, “Technical note: NSF I/UCRC Centre for Tire Research (CenTiRe): an overview,” Int. J. Vehicle Design, Vol. 65, Nos. 2/3, 2014.
    • Matthews, C. M., Cho, S.,Ferris, J.B., Schlinkheider , J., Montgomery, M., 2013. “Using Performance Margin and Dynamic Simulation for Location Aware Adaptation of Vehicle Dynamics” , SAE Int. J. Passeng. Cars – Mech. Syst., Vol. 6, No. 1, May 2013 6:225-230. (Paper Number 2013-01-0703, SAE, doi: 10.4271/2013-01-0703).
    • Fietzek, R., Chin, P.A., Cheng, C.; LaBrie, R., Rinderknecht, S., Ferris, J.B., 2013, “Control Strategy for the Excitation of a Complete Vehicle Test Rig with Terrain Constraints”, SAE Int. J. Passeng. Cars – Mech. Syst., May 2013 6 (1): 121-127. (Paper Number 2013-01-0671, SAE, doi:10.4271/2013-01-067).
    • Chung, H., North, C., Ferris, J.B., 2013. “Developing Large High-Resolution Display Visualizations of High-Fidelity Terrain Data.” J. Comput. Inf. Sci. Eng. 13(3) :034502-034502-7, ASME, 7 pages. doi:10.1115/1.4024656.
    • Chemistruck, H. M., Ferris, J.B., 2013. “Developing Compact Models of Terrain Surfaces.” Journal of Dynamic Systems Measurement and Control, Vol. 135, No. 6, 061008 (Aug 23, 2013) 9 pages. doi:10.1115/1.4025016.
    • Ma, R., Chemistruck, H. M., Ferris, J.B., 2013. “State-of-the-art of Terrain Characterization Models.” IJVD Special Issue on Modeling and Simulation of Ground Vehicle Systems, Guest Editors Zoran Filipi and David Gorsich, pp 285-304, Vol. 61, No. 1/2/3/4, doi:10.1504/IJVD.2013.050850.
    • Wagner, S. M. and Ferris, J. B., 2012, “Residual Analysis of Autoregressive Models of Terrain Topology,” Journal of Dynamic Systems Measurement and Control, Volume 134, Issue 3, 031003 (6 pages) http://dx.doi.org/10.1115/1.4005502.
    • Wagner, S. M. and Ferris, J.B., 2012, “Developing compact autoregressive characterisations of terrain topology profiles”, Int. J. Vehicle Systems Modelling and Testing, Vol. 7, No. 1, pp.12-25. (DOI: 10.1504/IJVSMT.2012.045312).
    • Chemistruck, H. M., Ferris, J.B., Gorsich, D., 2012. “Using a Galerkin Approach to Define Terrain Surfaces.” Journal of Dynamic Systems Measurement and Control, Volume 134, Issue 2, 021017 (12 pages) http://dx.doi.org/10.1115/1.4005271.
    • Wagner, S. M. and Ferris, J. B., 2011, “Stability and Interpretation of Autoregressive Models of Terrain Topology,” Journal of Dynamic Systems Measurement and Control. 133, 021003 (2011); http://dx.doi.org/10.1115/1.4003092 (5 pages).
    • Chemistruck, H. M., Binns, R., Ferris, J.B., 2010, “Correcting INS Drift in Terrain Surface Measurements” Journal of Dynamic Systems Measurement and Control. Vol. 133, No. 2 (DOI:10.1115/1.4003098).
    • Smith, H. and Ferris, J. B., 2010, “Calibration Design and Accuracy Verification of High Fidelity Terrain Measurement Systems,” Journal of Testing and Evaluation, Vol. 38, No. 4, pp. 431-438.
    • Smith, H., Ferris, J.B., 2010, “Techniques for Averting and Correcting Inertial Errors in High-Fidelity Terrain Topology Measurements.” Journal of Terramechanics, Vol. 47, No. 4, pp. 219-225.
    • Detweiler, Z. R., and Ferris, J. B., 2010, “Interpolation Methods for High-Fidelity Three Dimensional Terrain Surfaces,” Journal of Terramechanics, Vol. 47, No. 4, pp. 209-217.
    • Wagner, S. M. and Ferris, J. B., 2009, “Stability and Interpretation of Autoregressive Models of Terrain Topology,” Journal of Dynamic Systems Measurement and Control, Paper Number DS-09-1070(accepted for publication).
    • Wagner, S. M. and Ferris, J. B., 2009, “Developing Stable Autoregressive Models of Terrain Topology,” International Journal of Vehicle Systems Modelling and Testing, Vol. 4, No. 4, pp. 306-317.
    • Ferris, J. B., 2004, “Characterizing Road Profiles as Markov Chains,” IJVD, Special Edition on Road Profiles: Measurement, Analysis, and Applications, Vol. 36, No. 2/3.
    • Saeger, K. M., and Ferris, J. B., 2003, “Plausibility Checking of Road Profile Measurements,” SAE 2003 Transactions – Journal of Passenger Cars: Electronic and Electrical Systems, paper 2003-01-0669, SAE, Detroit, MI.
    • Ferris, J. B., and Estes, H. A., 2002, “Automotive Seat Suspension Model for Ride Quality Studies,” SAE 2002 Transactions – Journal of Passenger Cars: Mechanical Systems, paper 2002-01-0778, SAE, Detroit, MI, pp. 1130-1135.
    • Ferris, J. B., and Larsen, J. L., 2002, “Establishing Chassis Reliability Testing Targets Based on Road Roughness,” International Journal of Materials & Product Technology, Vol. 17, No. 5/6, pp. 453-461.
    • Ferris, J. B., Bernitsas, M. M., and Stein, J. L., 2000, “Redesigning the Dynamics of Complex Structural Systems,” AIAA Journal, Vol. 38, No. 1, pp. 147-154.
    • Ferris, J. B., Stein, J. L., and Bernitsas, M. M., 1998, “Development of Proper Models of Hybrid Systems,” Journal of Dynamic Systems, Measurement, and Control, Vol. 120, No. 3, pp. 328-333.


  • Papers in Refereed Conference Proceedings

    Papers in Refereed Conference Proceedings

    • Bandy, R.A., Cho, S., Ferris, J.B., Schlinkheider, J., and Wimmershoff, M., 2014, “Location-Aware Adaptive Vehicle Dynamics System: Linear Chassis Predictions,” Proceedings of the ASME Dynamic Systems and Control Conference (DSCC2014), Paper Number DSCC2014-6092, October 22-24, San Antonio, TX, USA
    • Deasy, C.M., Ferris, J.B., Tjhung, T., and Horn, E., 2014, “A Nodal Uncertainty Method to Detect Localized Events from Measured Terrain Surfaces,” Proceedings of the ASME Dynamic Systems and Control Conference (DSCC2014), Paper Number DSCC2014-6242, October 22-24, San Antonio, TX, USA.
    • Lambeth, J. N., Ferris, J.B., Reid , A., Gorsich, D., 2012. “Developing a Compact Continuous State Markov Chain for Terrain Road Profiles.” Proceedings of the SAE World Congress and Exhibition, April 16-18, Cobo Center, Detroit, Michigan, Paper Number 13M-0101/2013-01-0629.
    • Matthews, C. M., Cho, S.,Ferris, J.B., Schlinkheider , J., Montgomery, M., 2012. “Using Performance Margin and Dynamic Simulation for Location Aware Adaptation of Vehicle Dynamics.” Proceedings of the SAE World Congress and Exhibition, April 16-18, Cobo Center, Detroit, Michigan, Paper Number 13AC-0112/2013-01-0703.
    • Fietzek, R., Chin, P.A., Cheng, C.; LaBrie, R., Rinderknecht, S., Ferris, J.B., “Control Strategy for the Excitation of a Complete Vehicle Test Rig with Terrain Constraints,” Proceedings of the SAE World Congress and Exhibition, April 16-18, Cobo Center, Detroit, Michigan, Paper Number 13AC-0024.
    • Chin, P.A., Ferris, J.B., 2012, “Methodology for Optimizing First Order Markov Chains of Spectrally Decomposed Terrain Profiles,” Proceedings of the ASME Dynamic Systems and Control Conference, Paper Number 8746, October 17-19, Fort Lauderdale, FL.
    • Ma, R., Reid, A.,Ferris, J.B., 2012, “Capturing Planar Tire Properties Using Constraint Modes,” Proceedings of the ASME Dynamic Systems and Control Conference, October 17-19, Fort Lauderdale, FL.
    • Chin, P.A., Ferris, J.B., 2012, “Improving Markov Chain Models for Road Profiles Simulation via Definition of States,” Proceedings of the ASME/IEEE American Control Conference, Paper Number 2080, 2012 American Control Conference, Fairmont Queen Elizabeth, Montreal, Canada on June 27-June 29, 2012.
    • Ma, R., Ferris, J.B., 2011, “Terrain Gridding Using a Stochastic Weighting Function,” Proceedings of the ASME Dynamic Systems and Control Conference, October 31-November 2, Arlington, Virginia.
    • Kawale, S. J., Ferris, J. B., 2011, “Developing a Methodology to Synthesize Terrain Profiles and Evaluate their Statistical Properties,” Proceedings of the SAE World Congress and Exhibition, April 12-14, Cobo Center, Detroit, Michigan, Paper Number 11M-0299 (doi:10.4271/2011-01-0182).
    • Chemistruck, H. M., Ferris, J.B., 2010, “Compact Models of Terrain Surfaces,” Proceedings of the ASME Dynamic Systems and Control Conference, Paper Number 4037, ASME, Boston, MA.
    • Binns, R., Taheri, S., Ferris, J.B., 2010, “Improvements to Vehicle Traction Control System using Road Data,” Ground Vehicle Systems Engineering and Technology Symposium (GVSETS). Dearborn, MI. August 17-18, 2010. Michigan Chapter of the National Defense Industrial Association in coordination with The Engineering Society of Detroit.
    • Binns, R., Ferris, J.B., 2010. “Robust Triggering of Multiple Subsystems for a Terrain Measurement System,” Ground Vehicle Systems Engineering and Technology Symposium (GVSETS), Dearborn, MI. August 17-18, 2010. Michigan Chapter of the National Defense Industrial Association in coordination with The Engineering Society of Detroit.
    • Stalev, I., Kelly, S., Chemistruck, H., Ferris, J.B., Seipel, G., 2009, “Studying Terrain Excitations on Ground Vehicles through International Cooperation,” Proceedings of the ISTVS, Paper #ABS-32, Bremen, Germany. International Society of Terrain-Vehicle Systems.
    • Binns, R., Ferris, J.B., 2009, “Development of a Multi-Scale Terrain Measurement System,” Proceedings of the ISTVS, Paper #ABS-29, Bremen, Germany. International Society of Terrain-Vehicle Systems.
    • Smith, H., Ferris, J.B., 2009. “Excitation Event Design and Accuracy Verification Procedure for High-Fidelity Terrain Measurement Systems,” SPIE Symposium on Defense, Security + Sensing, Paper Number 7348-21, April 2009, Orlando, FL.
    • Chemistruck, H. M., Detweiler, Z. R., Ferris, J.B., Reid, A. A., Gorsich, D. J., 2009. “Review of Current Developments in Terrain Characterization and Modeling,” SPIE Symposium on Defense, Security + Sensing, Paper Number 7348-22, April 2009, Orlando, FL.
    • Müller, T., Ferris, J. B., Detweiler, Z., and Smith, H., 2009, “Identifying Vehicle Model Parameters using Measured Terrain Data,” Proceedings of the SAE World Congress, Paper Number 2009-01-1197, SAE, Detroit, MI.
    • Smith, H., Ferris, J. B., 2008, “Post Processing Techniques to Correct Inertial Errors in High Fidelity Terrain Topology Measurements,” Proceedings of the 16th International Conference of the International Society for Terrain-Vehicle Systems, Paper Identification Number 13, ISTVS, Turin, Italy.
    • Detweiler, Z., and Ferris, J. B., 2008, “Uniform Grid Spacing for Three Dimensional High Fidelity Terrain Profiles,” Proceedings of the 16th International Conference of the International Society for Terrain-Vehicle Systems, Paper Identification Number 14, ISTVS, Turin, Italy.
    • Kern, J.V., Ferris, J.B., 2007, “Developing ARIMA Road Profile Models with a Stationary Residual Process,” Proceedings of the Fifth IFAC Symposium on Advances in Automotive Control, AAC 2007. Aptos, CA.
    • Kern, J.V., Ferris, J.B., 2007, “Development of a 3-D Vehicle-Terrain Measurement System Part I:  Equipment Setup,” Proceedings of ISTVS: Innovations in Terrain and Vehicle Systems, ISTVS, Fairbanks, AK.
    • Wagner, S.M., Kern, J.V., Israel, W.B., Ferris, J.B., 2007, “Development of a 3-D Vehicle-Terrain Measurement System Part II: Signal Processing and Validation,” Proceedings of ISTVS: Innovations in Terrain and Vehicle Systems, ISTVS, Fairbanks, AK.
    • Kern, J.V., Ferris, J.B., 2007, “Characterizing 2-D Road Profiles Using ARIMA Modeling Techniques,” Proceedings of SPIE: Modeling and Simulation for Military Applications, SPIE, Orlando, FL.
    • Wagner, S. M., and Ferris, J. B., 2007, “A Polynomial Chaos Approach to ARIMA modeling and Terrain Characterization,” Proceedings of SPIE: Modeling and Simulation for Military Applications, SPIE, Orlando, FL.
    • Israel, W.B., Ferris, J.B., 2007, “Developing Markov Chain Models for Road Surface Simulation,” Proceedings of SPIE: Modeling and Simulation for Military Applications, SPIE, Orlando, FL.
    • Kern, J. V., and Ferris, J. B., 2006, “Characterizing 2-D Topographic Mappings of Roads,” Proceedings of the ASME International Congress and Exposition, ASME, Chicago, IL.
    • Ferris, J. B., 2006, “Capturing Planer Tire Enveloping Properties Using Static Constraint Modes,” Proceedings of the ASME International Congress and Exposition, ASME, Chicago, IL.
    • Kern, J. V., and Ferris, J. B., 2006, “Preliminary Results for Model Identification in Characterizing 2-D Topographic Road Profiles,” Proceedings of SPIE: Modeling and Simulation for Military Applications, SPIE, Orlando, FL.
    • Sun, T. C., Alyass, K, Wei, J., Gorsich, D. J., Chaika, M., Ferris, J. B., 2005, “Time Series Modeling of Terrain Profiles,” Proceedings of the SAE World Congress, paper number 2005-01-3561, SAE, Detroit, MI.
    • Frinkle, M., Weir, R., and Ferris, J. B., 2004, “A Graphical Representation of Road Profile Characteristics,” Proceedings of the SAE World Congress, paper number 2004-01-0769, SAE, Detroit, MI.
    • Gorsich, D. J., Chaika, M., Gunter, D., Karlsen, R., Haueisen, B., Sun, T., Ferris, J. B., 2003, “Terrain Roughness Standards for Mobility and Ultra-Reliability Prediction,” Proceedings of the SAE World Congress, SAE, Detroit, MI.
    • Saeger, K. M., and Ferris, J. B., 2003, “Plausibility Checking of Road Profile Measurements,” Proceedings of the SAE World Congress, paper 2003-01-0669, SAE, Detroit, MI.
    • Ferris, J. B., and Estes, H. A., 2002, “Automotive Seat Suspension Model for Ride Quality Studies,” Proceedings of the SAE World Congress, paper 2002-01-0778, SAE, Detroit, MI.
    • Ferris, J. B., 2001, “Singular Value Decomposition of Road Events into Characteristic Shapes,” Proceedings of the ASME International Congress and Exposition, ASME, New York, NY.
    • Rideout, D. G., Stein, J. L., and Ferris, J. B., 2001, “Target Cascading: A Design Process for Achieving Vehicle Ride and Handling Targets,” ASME DSC-9-4, Proc. IMECE 2001 Symposium on Advanced Automotive Technologies, New York.
    • Ferris, J. B., and Larsen, J. L., 2001, “Establishing Chassis Reliability Testing Targets Based on Road Roughness,” Proceedings of the Seventh ISSAT International Conference on Reliability and Quality in Design, ISSAT, Washington, D.C., pp. 75-79.
    • Christensen, B. G., Ferris, J. B., and Stein, J. L., 2000, “An Energy Enhanced Design of Experiments Method,” Proceedings of the ASME International Congress and Exposition, ASME, Orlando, FL, pp. 795-800.
    • Christensen, B. G., Ferris, J. B., and Stein, J. L., 2000, “An Energy Enhanced Design of Experiments Method Applied to Multibody Models,” Proceedings of the ASME International Congress and Exposition, ASME, Orlando, FL, pp. 527-534.
    • Ferris, J. B., 1999, “Factors Affecting Ride Quality in Automobiles,” Proceedings of the ASME International Congress and Exposition, ASME, Nashville, TN, pp. 649-654.
    • Ferris, J. B., and Stein, J. L., 1995, “Development of Proper Models of Hybrid Systems: A Bond Graph Formulation, ” Proceedings of the 1995 International Conference on Bond Graph Modeling, SCS, Las Vegas, NV, pp. 43-48.
    • Ferris, J. B., Stein, J. L., and Bernitsas, M. M., 1994, “Development of Proper Models of Hybrid Systems,” Proceedings of the Symposium on Automated Modeling for Design, 1994 ASME Winter Annual Meeting, ASME, Chicago, IL, pp. 629-636.
    • Ferris, J. B., and Stein, J. L., 1994, “Development of Proper System Models for Hybrid Systems: A Bond Graph Approach,” Proceedings of the 14th IMACS World Congress, IMACS, Atlanta, GA.


  • Papers Presented at Professional Meetings

    Papers Presented at Professional Meetings

    • Chung, H., North, C., and Ferris, J. B., 2010, “Developing Large High-Resolution Display Visualization of High-Fidelity Terrain Data,” Annual Road Profile Users Group Conference, Roanoke, VA, Oct 26, 2010.
    • Chemistruck, H., and Ferris, J. B., 2010, “Correcting INS Drift in Terrain Surface Measurements,” Annual Road Profile Users Group Conference, Roanoke, VA, Oct 26, 2010.
    • Chemistruck, H., and Ferris, J. B., 2010, “Transitioning from Profiles to Surfaces,” Annual Road Profile Users Group Conference, Roanoke, VA, Oct 26, 2010.
    • Ferris, J. B., 2008, “Terrain Modeling Task Force: Computational Simulation for Ground Vehicle Reliability,” SAE International – Dept. of Defense Maintenance & Systems Exhibition, Denver, CO, Oct 26, 2008.
    • Ferris, J. B., 2007, “3-D Profiler Signal Processing and Validation,” Annual Road Profile Users Group Conference, Danville, VA.
    • Ferris, J. B., 2006, “Vehicle Terrain Interactions,” Annual Road Profile Users Group Conference, Des Moines, IA.
    • Ferris, J. B., 2005, “Intro to Filtering Techniques for Road Profiles,” Annual Road Profile Users Group Conference, Columbus, OH
    • Ferris, J. B., 2005, “Determining Road Roughness Distributions to Support Virtual Proving Ground Development,” Annual Road Profile Users Group Conference, Columbus, OH.

Laboratory address:

Department of Mechanical Engineering
College of Engineering, Virginia Tech
635 Prices Fork Road, Blacksburg, VA 24061
540-231-6045