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A Tool for Lap Time Simulation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 01, 1996 by SAE International in United States
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The top Formula 1 and Indycar teams make large use of computer simulation to improve the performance of their cars and make the set-up process quicker on the circuit.
The paper aims to present a lap time simulation software dedicated to racing cars. It is based on the background of vehicle dynamics research developed at the University of Brescia, Italy (see ).
It should be stated that racecar dynamics is strongly non-linear due to the fact that tyres are always very near the limit of adhesion. Moreover this makes the effect of lateral load transfer fundamental for the general balance of the car.
Therefore Pacejka's Magic Formula has been used for lateral force/slip while longitudinal force computation is based on the assumption of a maximum longitudinal coefficient of friction μ. This is not only for simplicity but it is also due to lack of available data. The combined case is then based on the so-called “traction circle”. Lateral and longitudinal load transfer and downforce as well as their effects on tyre load are taken into account.
The vehicle model is capable of following a trajectory acquired with the on-board instrumentation. Also, the use of genetic algorithms enables the program to find the optimum cornering line for any given track. Some results are shown and compared with real world data.
|Technical Paper||Developments of a Method for Lap Time Simulation|
|Technical Paper||Vehicle and Tire Modeling for DynamicAnalysis and Real-Time Simulation|
|Technical Paper||Lap Time Simulation for Racing Car Design|
CitationGadola, M., Vetturi, D., Cambiaghi, D., and Manzo, L., "A Tool for Lap Time Simulation," SAE Technical Paper 962529, 1996, https://doi.org/10.4271/962529.
- Cambiaghi D. Gadola M. “Computer-aided racing car research and development at the University of Brescia, Italy” SAE paper n. 942507 . 1 st Motorsports Engineering Conference and Exposition , Dearborn (USA) December 1994
- Cambiaghi D. Gadola M. Manzo L. Vetturi D. “Semi-Active Strategies for Racing Car Suspension Control” SAE paper n. 962553 . 2 nd Motorsports Engineering Conference and Exposition , Dearborn (USA) December 1996
- Milliken W.F. Milliken D.L. “ Race Car Vehicle Dynamics ” SAE 1994
- Bakker E. Lidner L. Pacejka H.B. “A New Tyre Model with an Application in Vehicle Dynamics Studies” SAE Paper No. 890087 1989
- Sharp R.S. “Vehicle Dynamics Lecture Notes” MSc lecture notes Cranfield University 1992
- C.R.F. (FIAT Research Centre) Vehicle Dynamics Lectures - module A 1994
- C.R.F. (FIAT Research Centre) Vehicle Dynamics Lectures - module B 1994
- Ellis J.R. “Road Vehicle Dynamics” Ellis John R. Akron (Ohio, USA) 1989
- Bastow D. Howard G. “Car Suspension and Handling - Third Edition” Pentech Press - SAE 1993
- Cambiaghi D. Gadola M. “ Racecar suspension kinematics design: a report on the tool developed at the University of Brescia ” Internal paper University of Brescia Italy January 1994
- Cambiaghi D. Gadola M. “MMGB: a computer-based approach to racing car suspension design” ATA Journal- Ingegneria Automotoristica 1994
- Manzo L. Vetturi D. Gadola M. Cambiaghi D. “Modelling, simulation and analysis of vehicle suspension system dynamics” 29th ISATA Florence, Italy June 1996
- Dixon J.C. “Tyres, Suspension and Handling” Cambridge University Press Cambridge 1991