Designing Thrust Sliding Bearings of High Bearing Capacity

Differential Quadrature Method for the Analysis of Hydrodynamic Thrust Bearings

This paper presents the application of the method of generalized differential quadrature (GDQ) for the analysis of hydrodynamic thrust bearings. GDQ is a simple, efficient, high-order numerical technique and it uses the information on all grid points to approach the derivatives of the unknown function. The effectiveness of the solution technique is verified by comparing the GDQ computed results...

μ Control of a High Speed Spindle Thrust Magnetic Bearing

Experimental results demonstrate that μ synthesis provides an excellent tool for increasing the dynamic stiffness of thrust magnetic thrust bearings. Accurate system modeling and appropriate uncertainty descriptions are critical to obtaining such results and are described in detail. Both complex μ and mixed μ synthesis were used to design controllers. The performance of the μ controllers is com...

Holographic Measurement of Cavitation in Sliding Bearings

Designing High-Capacity Wireless Networks

The main method to control bit errors is to use a combination of forward error correction (FEC) and link-layer retransmissions (ARQ, which stands for “automatic repeat request”). In addition, modern wireless devices can transmit at multiple different rates using different modulation schemes, adapting their transmission rate to prevailing channel conditions. Such schemes are often called autorat...

Lubrication of Sliding Bearings for Hydropower Applications

The influence of pad facing material on hydrodynamic lubrication in tilting-pad thrustbearings is investigated in terms of pad and oil-film temperatures and oil-film thickness. Two tilting-pad thrust bearings are examined: one with babbitt pad facing, the other with a layer of a PTFE based composite material. Frictional torque, pad, collar and oil-film temperatures and oil-film thicknes...