Papers by Keyword: Wheel Velocity

Abstract: Jet power drive system of quarter vehicle is put forwarded to improve starting drive efficiency. It analyzes JPD working principle, adds a jet power and researches for the basic simulation of control model with slip-rate as the control object based on PID control theory. The academic feasibility of jet power drive system is expatiated, that is based on the principle of compressed air power which is applied to the starting drive system, then establishes dynamics model of a new automotive anti-slip drive system and simulation model of ASR&JPD by the MATLAB/Simulink. The simulation tests are designed to compare with the curves of vehicle speed and driving wheel velocity using the JPD. The graph proves that JPD can reduce starting drive distance at 21%--77% and starting drive time at 12%--70%. Augmentation rate of vehicle acceleration exceeds 50%. The results show that the ASR&JPD can increase starting drive efficiency.

Abstract: Thermal stresses of grinding plays an important role on the fatigue and wear resistance of the component. A comprehensive analysis of thermal stress induced by surface grinding has been conducted with aid of the finite element method. To obtain a reliable figure of thermal stress induced by grinding, temperature-dependent properties of workpiece materials were taken into account. The developed finite element procedure has also been applied to calculate the surface and sub-surface thermal stress induced by moving source of triangular heat when convection and radiation is occurred over the whole work. Based on an analysis of the effects of wheel velocity on the thermal stress distributions in an elastic-plastic solid, some important conclusions were given.