Article history: Received 12 October 2013 Received in revised form 24 August 2014 Accepted 28 August 2014 Available online xxxx The mechanics of belt friction before the state of gross slip is considered. The variation of the belt force within the contact region is evaluated based on the assumption of gradual growth of slip from the pull-end to the hold-end of the belt, as the pull force increa...

This study studies the relationship between tyre pressure and fuel consumption of vehicles using experimental methods and mathematical model to predict vehicle fuel consumption. The model obtained was F = 0.62722.5941p+3.3428p±0.018 where F is the fuel consumed and p is the tyre pressure of a vehicle, which can also be used to predict the amount of fuel consumed by other vehicles. The model was...

In the Structural Dynamics and Acoustics group at the University of Twente, we aim to develop a quantitative tyre/road noise model. An essential part of this model is an accurate contact algorithm which is fast enough to simulate tyre vibrations up to the acoustic frequencies. In this paper we present a contact algorithm, describing the contact between a tyre and a road surface, which has the p...

Piezo-actuated miniaturized Stick-Slip drives (positioners) are well known both in research and industry. The function of the drives can be subdivided into the phase of actuation (Stick) and the retraction of the actuator (Slip). Although the deflection of the actuator is limited, theoretically infinite motion can be realized, combined with high positioning resolution. In this work a new method...

A variable structure slip control strategy is developed for grasping objects by a robot end-effector. A hybrid controller comprised of a fuzzy controller and a PI controller is designed to perform the strategy. When a grasped object is slipped by an external force as a disturbance, the applied fingertip force is rapidly increased to stop sliding and then decreased to a reliable limit to hold th...

This application note focuses on a design based on National Semiconductor’s patented NeuFuz based neural-fuzzy technology to arrive at a slip control scheme implemented on National Semiconductor’s low-cost COP8TM microcontroller. NeuFuz technology allows for the automated generation of a fuzzy logic control engine based on training data. In this case, the training data was taken from the well k...

The ability of an automobile tyre to ‘grip’ the road and avoid skidding is ultimately dependent upon the events in the tyre-road interface. This seems obvious, and yet some 70 years after pneumatic rubber tyres were first put to use we are not able to explain fully the frictional processes between the tyre and the road. Over 650 papers have been published prior to 1970 on some aspect of tyre be...

Molecular dynamics (MD) simulation is used to study slip at the fluid-solid boundary in an unsteady flow based on the Stokes’ second problem. An increase in slip is observed in comparison to the steady flow for shear rates below the critical shear rate of the corresponding steady flow. This increased slip is attributed to fluid inertial forces not represented in a steady flow. An unsteady mathe...