This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Straight-Line Dry Tractor-Semitrailer Braking and Handling Comparison to HVE Computer SImulation
Technical Paper
2010-01-1921
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The ability of a simulation model to accurately predict vehicle response is investigated in this paper. This study seeks to compare full-scale tractor-semitrailer straight-line braking test data to predicted response from a detailed heavy truck computer vehicle dynamics simulation model. The model, Simulation MOdel Non-linear (SIMON), is a vehicle dynamic simulation model within the Human Vehicle Environment (HVE) software environment. This computer program includes a vehicle dynamic model capable of simulating vehicle motion in 3-dimensional environments and includes Brake Designer and ABS Simulation Models.
The results of several days of full scale instrumented testing of a tractor-semitrailer performed at the Transportation Research Center, in East Liberty, Ohio are presented. Instrumented braking tests were performed at two speeds of 13.4 m/s (30 mph) and 27 m/s (60 mph) for 2 primary configurations including an unloaded semitrailer configuration (
LLCW
) and a full gross vehicle weight condition (GCW). In addition various wheel brakes were disabled symmetrically and asymmetrically for each of the above conditions to evaluate the tractor-trailer response. These straight-line braking tests were performed on dry concrete surfaces.
Vehicle parameters and inputs for the computer simulation models were obtained from the actual vehicle or motor vehicle manufacturer's specifications and each test's individual configuration. The simulation results, in terms of vehicle dynamics responses, are compared to the full-scale test data. The simulations were modified and tuned to simulate full-treadle braking with all brakes functioning correctly, as well as the behavior of the rig under full braking with selected brakes disabled. Comparisons allow validation of the computer simulation model against real-world test data under many real-world conditions. The process of tuning the model is discussed in terms of the tradeoffs considered. The effects of vehicle configuration variations are also analyzed and presented in this paper.
Recommended Content
Authors
Topic
Citation
Bayan, F., Cornetto, A., Dunn, A., Wahba, R. et al., "Straight-Line Dry Tractor-Semitrailer Braking and Handling Comparison to HVE Computer SImulation," SAE Technical Paper 2010-01-1921, 2010, https://doi.org/10.4271/2010-01-1921.Also In
References
- Dunn, A. Tanner, C.B. Morr, D.R. Bayan, F. et al. “The Influence of Disablement of Various Brakes on the Dry Stopping Performance and Stability of a Tractor-Semitrailer,” SAE Int. J. Commer. Veh. 2 1 1 16 2009 10.4271/2009-01-0099
- Bayan, F.P. Cornetto, A.D., III Dunn, A. Tanner, C.B. et al. “Comparison of Heavy Truck Engine Control Unit Hard Stop Data with Higher-Resolution On-Vehicle Data,” SAE Int. J. Commer. Veh. 2 1 29 38 2009 10.4271/2009-01-0879
- Bayan, F.P. Cornetto, A.D., III Dunn, A. Sauer, E. “Brake Timing Measurements for a Tractor-Semitrailer Under Emergency Braking,” SAE Int. J. Commer. Veh. 2 2 245 255 2009 10.4271/2009-01-2918
- United States Department of Transportation, National Highway Traffic Safety Administration (NHTSA) “Laboratory Test Procedure for FMVSS No. 121 for Air Brake System,” 2004
- Dunn, A.L. Heydinger, G.J. Rizzoni, G. Guenther, D.A. “Empirical Models for Commercial Vehicle Brake Torque from Experimental Data,” SAE Technical Paper 2003-01-1325 2003 10.4271/2003-01-1325