Abstract: The exponents of the clearance to radius term (C∕R) in the scaling law for damping ratio ζ in Eqs. 19,20 were inadvertently switched between these two equations. Equations 19,20 should ...

Abstract: The journal bearings of the MIT micro-devices are located at the outer periphery of the rotor and are designed to operate at rotational speeds of order two million rpm in order to enable ...

Abstract: The high-speed microhydrostatic gas journal bearings used in the high-power density MIT microengines are of very low aspect ratio with an L∕D of less than 0.1 and are running at surface speeds ...

Abstract: Several years ago an effort was undertaken at MIT to develop high-speed rotating MEMS (Micro Electro-Mechanical Systems) using computer chip fabrication technology. To enable high-power density ...

Abstract: Silicon based power micro-electro-mechanical system (MEMS) applications require high-speed microrotating machinery operating stably over a large range of operating conditions. The technical barriers ...