Type of Document	Master's Thesis
Author	Ramanata, Peeroon (Pete)
Author's Email Address	pramanat@vt.edu
URN	etd-32298-194239
Title	Optimal Vehicle Path Generator Using Optimization Methods
Degree	Master of Science
Department	Mechanical Engineering
Advisory Committee	Advisor Name Title Mehdi Ahmadian Committee Chair Douglas J. Nelson Committee Member Pushkin Kachroo Committee Member
Keywords	Optimal Path Time Minimization Tire Force Maximization Optimization Vehicle Dynamics
Date of Defense	1998-04-15
Availability	mixed
Abstract This research explores the idea of developing an optimal path generator that can be used in conjunction with a feedback steering controller to automate track testing experiment. This study specifically concentrates on applying optimization concepts to generate paths that meet two separate objective functions; minimum time and maximum tire forces. A three-degree-of freedom vehicle model is used to approximate the handling dynamics of the vehicle. Inputs into the vehicle model are steering angle and longitudinal force at the tire. These two variables approximate two requirements that are essential in operating a vehicle. The Third order Runge-Kutta integration routine is used to integrate vehicle dynamics equations of motion. The Optimization Toolbox of Matlab is used to evaluate the optimization algorithm. The vehicle is constrained with a series of conditions, includes, a travel within the boundaries of the track, traction force limitations at the tire, vehicle speed, and steering. The simulation results show that the optimization applied to vehicle dynamics can be useful in designing an automated track testing system. The optimal path generator can be used to develop meaningful test paths on existing test tracks. This study can be used to generate an accelerated tire wear test path, perform parametric study of suspension geometry design using vehicle dynamics handling test data, and to increase repeatability in generating track testing results.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    Chapter1.pdf 25.82 Kb 00:00:07 00:00:03 00:00:03 00:00:01 < 00:00:01   Chapter2b.pdf 188.90 Kb 00:00:52 00:00:26 00:00:23 00:00:11 00:00:01   Chapter3.pdf 61.65 Kb 00:00:17 00:00:08 00:00:07 00:00:03 < 00:00:01   Chapter4.pdf 237.32 Kb 00:01:05 00:00:33 00:00:29 00:00:14 00:00:01   Chapter5.pdf 11.76 Kb 00:00:03 00:00:01 00:00:01 < 00:00:01 < 00:00:01   etd.pdf 26.40 Kb 00:00:07 00:00:03 00:00:03 00:00:01 < 00:00:01   Reference.pdf 10.25 Kb 00:00:02 00:00:01 00:00:01 < 00:00:01 < 00:00:01   title.pdf 3.84 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   Vita.pdf 4.21 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 There are 1 files which have been withheld at the author's request. indicates that a file or directory is accessible from the Virginia Tech campus network only.

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