@CONFERENCE{LanTsi02, author = {Lanzon, A. and Tsiotras, P.}, title = {Robust Control of Energy Momentum Wheels Supported on Active Magnetic Bearings using ${{\cal H}_\infty}$~Loop-Shaping and $\mu$-Synthesis}, booktitle = {Proceedings of the {\em 15th IFAC World Congress}}, year = {July 21-26, 2002}, address = {Barcelona, Spain} }