The dynamic stability of a vehicle depends on various maneuvering features, such as traction, braking, and cornering. This study presents nonlinear vehicle models for estimating the stability region and simulating the dynamic behavior of a vehicle. Two types of vehicle models were found by considering the degrees of freedom and linearity. A simple model with nonlinear tire dynamics is useful for determining the stability region, while a complex model (a multi-body dynamic model in MSC.ADAMS) is appropriate for carrying out accurate simulations. Actual data for a mid-sized passenger car were used, and the models were validated by comparison with test results.
For the sake of example, ride stiffness controls ride height, which has strong effects on aerodynamics of ground effect cars (almost every race car with relevant aerodynamics design). Another example would be the effect of ride stiffness on wheel hop frequency. Hence, springs and tyre pressures should only be changed when other aspects need modification, but not only roll stiffness itself (unless the vehicle has no antiroll bar).
race car vehicle dynamics milliken pdf free download
There are books in race car vehicle dynamics literature that are considered bibles. They are definitely a must read, if you are serious about learning this subject. Here are some good books on the matter:
Written for both the engineer and the automobile enthusiast, RCVD explores the engineering details governing the motions of automobiles in general and race cars in particular. Topics addressed include: Tire behavior, Aerodynamics, Steady-State and Transient Stability & Control, Wheel Load analysis, Steering Systems, Suspensions, Dampers, Force-Moment analysis, "g-g" Diagram analysis and much more. The historical chapter on vehicle dynamics development is a good read in itself for the non-mathematically oriented.
In February 2002 Milliken's 700-page complement to RCVD, Chassis Design: Principles and Analysis, was published. While RCVD looks at the fundamentals and the big picture of vehicle dynamics, this book focuses on the details of suspension and steering systems, springing, oscillations of the unsprung masses, sprung mass roll effects and other design details. Implications on vehicle ride and handling characteristics are emphasized. To learn more about this complementary text click here.
RCVD has sold over 30000 copies and is being used as a textbook at over twenty universities. The Millikens have worked closely with faculty to develop curricula. The companion book Race Car Vehicle Dynamics: Problems, Answers and Experiments provides problems, worked solutions, vehicle dynamics programs on CD and other additional material to assist in learning and understanding vehicle dynamics.
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