AM4202 Dynamics of Road Vehicles Syllabus:
AM4202 Dynamics of Road Vehicles Syllabus – Anna University PG Syllabus Regulation 2021
OBJECTIVES:
To provide fundamental knowledge of the vibration,
To impart knowledge on tyres
To provide basic concepts on suspension design and function, ride modes
To Evaluate the performance, longitudinal dynamics and control in an automobile
To provide basic analysis on handling, cornering stability and control
UNIT I CONCEPT OF VIBRATION
Definitions, Modeling and Simulation, Global and Vehicle Coordinate System, Free, Forced, Undamped and Damped Vibration, Response Analysis of Single DOF, Two DOF, Multi DOF, Magnification factor, Transmissibility ratio, Base excitation. Vibration absorber, Vibration measuring instruments, Torsional vibration, Critical speed.
UNIT II TYRES
Tyre axis system, tyre forces and moments, tyre marking, tyre structure, hydroplaning, wheel and rim. Rolling resistance, factors affecting rolling resistance, Longitudinal and Lateral force at various slip angles, Tractive and cornering property of tire. Camber and camber trust. Performance of tire on wet surface. Ride property of tyres. Various test carried on a tyre.
UNIT III VERTICAL DYNAMICS
Human response to vibration, Sources of Vibration. Suspension requirements – types. State Space Representation. Design and analysis of Passive, Semiactive and Active suspension using Quarter car, Bicycle Model, Half car and full car vibrating model. Influence of suspension stiffness, suspension damping, and tire stiffness. Control law. Suspension optimization techniques. Air suspension system and their properties.
UNIT IV LONGITUDINAL DYNAMICS AND CONTROL
Aerodynamic forces and moments. Equation of motion. Load distribution for three-wheeler and four-wheeler. Calculation of maximum acceleration, tractive effort and reaction forces for different drive vehicles. Power limited acceleration and traction limited acceleration. Estimation of CG location. Stability of vehicles resting on slope. Driveline dynamics. Braking and Driving torque. Prediction of Vehicle performance. ABS, stability control, Traction control.
UNIT V LATERAL DYNAMICS
Steering Geometry – Steady state handling characteristics. Steady state response to steering input – Yaw velocity gain, Lateral acceleration gain, curvature response gain. Testing of handling characteristics. Transient response characteristics. Directional stability. Stability of vehicle on banked road, during turn. Effect of suspension on cornering. Roll center, Roll axis.
TOTAL: 45 PERIODS
OUTCOMES:
At the end of the courses, the students can able to
Develop physical and mathematical models of a mechanical vibrating system
Indicate the forces and moment acting on tyres
Identify the suspension parameters that governs ride comfort
Evaluate the vehicle performance in longitudinal direction
Evaluate the lateral dynamics and control in an automobile
REFERENCES:
1. Singiresu S. Rao, “Mechanical Vibrations,” Fifth Edition, Prentice Hall, 2010
2. J. Y. Wong, “Theory of Ground Vehicles”, Fourth Edition, Wiley-Interscience, 2008
3. Rajesh Rajamani, “Vehicle Dynamics and Control,” Second edition, Springer, 2012
4. Thomas D. Gillespie, “Fundamentals of Vehicle Dynamics,” Society of Automotive Engineers Inc, 2014
5. Dean Karnopp, “Vehicle Dynamics, Stability, and Control”, Second Edition, CRC Press, 2013
6. R. Nakhaie Jazar, “Vehicle Dynamics: Theory and Application”, Second edition, Springer, 2013
7. Michael Blundell & Damian Harty, “The Multibody Systems Approach to Vehicle Dynamics”, Elsevier Limited, 2004
8. Hans B Pacejka, “Tyre and Vehicle Dynamics,” Second edition, SAE International, 2005