Rail wheel squeal on curves in rail track is a source of potential noise annoyance to residents adjacent to rail lines. For one private rail freight operator, wheel squeal was causing repeated complaints from neighbours. Wheel squeal can be caused by the wheel-tyre to rail-top interaction and the wheel flange interaction with the gauge face of the rail (more like a screech). This paper describe...

In any brake system of an automobile or passenger vehicle, an increase in Master/Wheel cylinder diameter ratio leads to an increase in brake efficiency. This paper focuses on Master/Wheel cylinder diameter effect on the brake efficiency. A VISUAL BASIC computer code was developed for computation of Master/Wheel cylinder diameter ratio corresponding to break efficiency. Aided by the developed so...

the evaluation and control of the trains induced vibrations needs even more attention in the case of underground tracks which passes near to monuments and historical sites. the rail corrugations which occur due to the wheels’ impulse loads during the operation period of underground railway tracks, usually amplify the ground borne noise and vibration. in the current study, the mentioned phenomen...

The work describes the design and construction of engine Propelled and joystick operated vehicle wheels by means of three differential gearboxes vertical axis. The cockpit is bellow the engine payloads. The vehicle is controlled by joystick. vehicle with improved mobility performance as compared to traditional all terrain vehicle. The MK5 has six wheels for stable, reconfigurable adjustable cha...

A novel approach to vehicle velocity estimation is proposed. To be cost effective, the estimation is based solely on wheel speed measurement without any additional information on vehicle acceleration. This is made possible by employing an adaptive nonlinear filter scheme which proves to be simple and efficient. Simulation results from field-testing data show that this method results in accurate...

This article proposes a novel longitudinal vehicle speed estimator for snowy roads in extreme conditions (four-wheel slip) based on low-cost wheel encoders and acceleration sensor. The tire rotation factor, η, is introduced to reduce the deviation between radius manufacturer’s marked radius. Local Vehicle Speed Estimator defined eliminate estimation error. It improves slip accuracy of four-whee...

ESP is an active safety system for road vehicles to control the dynamic vehicle motion in emergency, the composition and working principle of ESP were introduced in the paper, and the control technology of ESP was studied too. A virtual prototype model of a vehicle model was built in ADAMS/Car, and the yaw fuzzy control co-simulation model of vehicle was established in Matlab/Simulink, to study...

An investigation on the robustness of a torque vectoring control based on an inverse disturbance observer architecture for a rear wheel driven vehicle with electric single wheel drives is presented within this contribution. To ensure robust control parameters, specifications for eigenvalues (Γ-stability) and bounds on weighted sensitivity and complementary sensitivity functions in frequency dom...

The Leg-Wheel-Vehicle paradigm offers remarkable and diverse opportunities for creation of mobile and maneuverable terrestrial locomotion systems. However, this capability needs to be unlocked by careful design and control of the individual articulations, the sub-chains and the systems as a whole. Viewing leg-wheel vehicles as another class of parallelkinematic systems now facilitates the syste...