JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Automobile Engineering

Course Objectives:

• The students should be able to understand multi-body system approach to vehicle dynamics.
• The student should be able to use 2-D computational software to solve vehicle dynamics problems

Course Outcomes

At the end of the course the students will be able to

• The focus of Automotive System Dynamics is to introduce the fundamentals of vehicle dynamics and the performance indices and evaluation criteria of vehicles, to analyze the influence of vehicle configuration and design parameters on vehicle performance.

UNIT - I

Introduction: Fundamental Principles, Vehicle tires performance, cornering characteristics, Mechanics of Vehicle Terrain interaction. Vehicle Kinematics, Fundamental principles of velocity, acceleration. Two dimensional mechanisms, Forward Vehicle Dynamics.

UNIT - II

Three dimensional Mechanisms, Multi-Body Systems Design, Introduction to 3D vehicle design.

UNIT - III

Suspension Design: Computer models using Bond Graph Technology, Drive train dynamics, vehicle performance

UNIT - IV

Steering Mechanisms: Two and three-dimensional analysis, Mechanics of Vehicle Terrain interaction. Vehicle Collations, Fundamental laws of motion, energy and momentum, Forces and Moments 2D and 3D. The Dynamics of vehicle rollovers.

UNIT - V

Wheeled Vehicle Handling – Handling control loop, vehicle transfer function, Kinematic behavior of vehicles with rigid wheels and with complaint tyres: Neutral steer point, static margin, over and under- steer. Solution with two degree of freedom in the steady state: Stability factor, characteristic and critical speeds. Tracked Vehicle Handling – Analysis of sprocket torques and speeds, required to skid steer a tracked vehicle. Extension of theory to include three degrees of freedom.

TEXT BOOKS:

• 1. Vehicle Dynamics Theory and Application by Reza Jazar, Springer 2008
• 2. Theory of Ground Vehicles by J.Y.Wong, John Wiley.

REFERENCE BOOKS:

• 1. Vehicle stability by Dean Karnopp, Dekker Mechanical Engineering
• 2. Modeling & Simulation of Mechatronics Systems by Karnoop Margolis, Rosenberg, Wiley 2007.
• 3. Suspension and Tyres by Giles J.G. Steering, Illiffe Books Ltd., London.
• 4. Fundamental of Vehicle Dynamics by Gillespie T.D, SAE USA. R19 M.Tech. Machine Design M. Tech. (MACHINE DESIGN)