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For more precise applications, axial motion systems have to be controlled for reducing uncertain perturbations of systems. However, the present control algorithms are difficult to deal with because of the highly nonlinear and unknown properties of uncertainties. Although some control algorithms are used to effectively degrade the uncertainty effects, the copious process and the complicated computation...
Catastrophic and premature bearing failure caused by excessive thermally-induced bearing preload is a major design problem for spindle bearings of high-speed machine tools. Due to a lack of a low cost and easy to maintain on-line preload measuring technique, the traditional solution is to limit the maximum spindle speed and the initial bearing preload. This solution is incompatible with the need to...
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