The wear of star wheel teeth is an importance issue in the single screw compressor. In order to enhance the wearresistance of star wheel teeth, some new profiles of the meshing pair were proposed to replace the currently used straight line envelope profile, such as single column envelope, multi-straight line (or multi-column) envelope. In this paper, a curved surface of the tooth flank is sugge...

Abstract Aerostatic spindles are used in precision grinding applications requiring high stiffness and very low error motions (5 to 25 nm). Forces generated during precision grinding are small and present challenges for accurate and reliable process monitoring. These challenges are met by incorporating non-contact displacement sensors into an aerostatic spindle that are calibrated to measure gri...

Inflatable robotic rovers (IRRs) are a promising concept for long-range exploration and access to high-risk areas on planetary surfaces. Through inflation or expansion of their locomotion elements, inflatable rovers can achieve extraordinary terrainability not possible by other conventional mobility systems while maintaining respectable travel speeds. Early work by NASA's Jet Propulsion Laborat...

Increased railway patronage worldwide is putting pressure on rolling stock and infrastructure to operate at higher capacity and with improved punctuality. Condition monitoring is seen as a contributing factor in enabling this and is highlighted here in the context of rolling stock being procured with high capacity data buses, multiple sensors and centralised control. This therefore leaves scope...

Rail and wheel health management is investigated with focus on deterioration phenomena in the wheel/rail contact interface – plastic deformation, wear, rolling fatigue (RCF). How operational conditions affect deterioration, how they can be included predictions linked to a more in-depth description of mechanisms. Here means measuring, quantifying, predicting focus. This discussion provides basis...