Nonlinear control of an active magnetic bearing with bias currents: experimental study. - Thomas R. Grochmal; Alan F. Lynch (ACC, 2006)

A numerical analysis of the algebraic derivative method with application to magnetic bearings. - Thomas R. Grochmal; Alan F. Lynch (CDC, 2007)

Precision Tracking of a Rotating Shaft With Magnetic Bearings by Nonlinear Decoupled Disturbance Observers. - Thomas R. Grochmal; Alan F. Lynch (IEEE Trans. Control. Syst. Technol., 2007)