Design and Prototypingof a Fast Acting Anti Roll Over System for SUVs

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Balaghi Enalou, Hossein | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43561 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Durali, Mohammad
Abstract:
SUVs are susceptible to rollover in high speed due to their shape and high center of mass. This causes numerous limitations for this class of vehicles thus preventing their rollover is a prime issue. In this study, two flywheels with high angular momentum have been used to provide stabilizing momentum on the onset of rollover. However, if these flywheels keep rotating during the normal driving, they will cause maneuvering limitations for the car. The idea of using flywheels is completed by bringing them to speed in a few hundredth of a second when the vehicle is suspicious to rollover.To achieve this, dynamics of the car before and after lift off of one side is investigated. Also the dynamic equations of the gyroscope and its interaction with the structure of the car have been derived. The dimensions of the discs have been calculated by taking into account the moment produced by the gyroscope. An algorithm for predicting the rollover and the control system for a sample SUV was designed. The system behavior was then simulated and its effectiveness in preventing rollover was evaluated. The result offer very promising and practical results
Keywords:
Vehicle Dynamics ; Gyroscope ; Rollover ; Sport Utility Vehicle (SUV)

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