Farhad Pashaei - Department of Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
Seyed Mahdi Abtahi - Department of Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran

In this paper, firstly chaotic behavior of the lateral dynamics of vehicle is investigated by the use of numerical tools including Lyapunov exponent and bifurcation diagrams. To this end rout to chaos along with period doubling and quasi-periodic responses are demonstrated in terms of bifurcation diagrams. After chaos analysis, a novel controller commensurate with the chaotic characteristics of the system, in conformity with Poincaré map is represented to suppress the chaotic behavior of lateral movement. The Poincaré map of the system is derived by means of a neuro fuzzy network. A robust Fuzzy system on the basis of nonlinear Ott-Grebogi-Yorke (OGY) method forms the control system. Closed-loop results of the system shows effectiveness of the chaos controller in extreme conditions.

Chaos control, Fuzzy inference, Poincaré map, Vehicle lateral dynamics