Hassan Moosavi - Associate Professor Isfahan University of Technology
Ali Bahramian - Master Student - Islamic Azad University Khomeinishahr Branch Faculty of Mechanical Engineering

. Analysis for Jackknifing of Truck and Trailer for the Dynamic stability zone The effect of steering angle, speed and the coefficient of friction between the tires and the road is are consider. The system will be tested with three axels. the Lagrange method equations of motion are obtained . Then the state equations are determined. Equilibrium points are found by equality all time derivatives to zero .By small Perturbations stability of system come be obtained by solving the equations of motion

Truck and Trailer , Dynamic Stability , Jackknifing , Small Perturbations