Scale-Model Vehicle Analysis for the Design of a Steering Controller
Trident Scholar Project rept. no. 309
NAVAL ACADEMY ANNAPOLIS MD
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This Trident project investigates the design of a driver assistance steering controller. The initial goal of this research was to modify an off-the-shelf radio controlled RC car to make it dynamically similar to full-size automobiles. Using ratios of vehicle parameters known as P groups, the Buckingham-Pi theorem was applied to analyze both the scale vehicle and a variety of full-size vehicles. To establish the standards by which to modify the RC car, the P groups of actual automobiles have been calculated using published data. Before any of the RC cars P groups could be calculated, different parameters of the RC car needed to be measured. Based on comparisons of corresponding P groups, appropriate modifications have been made to achieve dynamic similitude. A control system was designed to control the lateral and longitudinal position of the RC car. The control system stabilized the vehicle but will require further tuning to achieve accurate tracking. After performing an experiment consisting of a lane change maneuver, the data from the RC car was compared to data from similar experiments using full-size automobiles. Similarity between the results verifies the dynamic similitude of the RC car and the full-size automobiles.
- Radio Communications