June 26, 2011
June 26, 2011
June 29, 2011
22.121.1 - 22.121.17
A Vehicle Dynamics Design and Simulation Tool for Capstone ProjectsA vehicle dynamics simulation tool for use by student design teams has been developed as a partof an exchange program between participating universities. Students participating in theexchange program, both domestic and foreign, complete a Senior Capstone Design project andadditionally write a Diploma Thesis as part of earning degrees from both universities. Thesimulation tool is meant for use in the early stages of the design of four-wheeled vehicle projectssuch as the SAE Mini-Baja challenge or the SAE Formula competition. The simulation tool,developed from first principles, uses MATLAB and Simulink which simulates a14-degrees-of-freedom (DOF) system. The model can accommodate different suspension linkages and allowsanti-roll bars in the simulation. The model is also capable of simulating Ackermann, parallelsteering and reverse Ackermann steering. Non-linear tire modeling simulates turning forces fromdifferent types of tires on various surfaces. Results of low speed cornering simulation areverified by a physical test with a passenger vehicle at low velocities. The results of the highvelocity cornering analysis are cross-referenced with findings in vehicle dynamics literature.Simulations provide turning radius estimation and the determination of the understeer andoversteer behavior of the vehicle. Suspension impact forces and suspension travel in cases ofimpact from a user specified height are included.The design and simulation tool is open-source allowing future teams access to the software forfuture updates or revisions. A tutorial is included that provides teams with instructions on thesoftware usage, facilitating the decision-making process earlier in the capstone design schedulethan would otherwise be possible.
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