Ertugrul, N. and Acarnley, P. A new algorithm for sensorless operation of
permanent magnet motors, IEEE Transactions on Industry Applications,
Vol. 30, No. 1, pp. 126-133, January - February, 1994.
 Evans, R., Griesbada, J. and Messner, W.C. Piezoelectric microactuator
for dual-stage Control, IEEE Transactions on Magnetics, Vol. 35, No. 2,
pp. 977-982, March 1999.
 Fan, L.S. et al. Magnetic recording head positioning at very high track
densities using a microactuator-based two-stage servo system, IEEE
Transactions on Industrial Electronics, Vol. 42, No. 3, pp. 222-233, June
 Fitzgerald, A.E., Kingsley, C. and Umans, S.D. Electric Machinery,
McGraw-Hill Book Company, London, 1992.
 Francis, B.A. and Wonham, W.M. The internal model principle for linear
multivariable regulators, Applied Mathematics and Optimization,Vol.2,
No. 2, pp. 170194, June 1975.
 Franklin, G.F., Powell, J.D. and Workman, M.L. Digital Control of Dy-
namic Systems, Addison-Wesley Publishing Company, Reading, MA, 3rd
 Freudenberg, J., Middleton, R. and Stefanopoulou, A. A survey of inher-
ent design limitations, Proceedings of the American Control Conference,
Chicago, Illinois, USA, pp. 2987-3001, June 2000.
 Fujimoto, H., Hori, Y. and Kawamura, A., Perfect tracking control
based on multirate feedforward control with generalized sampling pe-
riods, IEEE Tranactions on Industrial Electronics, Vol. 48, No. 3, pp.
636-644, June 2001.
 Fujita, H. et al. A microactuator for head positioning system of hard disk
drives, IEEE Transactions on Magnetics, Vol. 35, No. 2, pp. 1006-1010,
 Gahinet, P. and Apkarian, P. Following control of a hard disk drive
by using sampled-data H ∞ control, Proceedings of IEEE International
Conference on Control Applications , Hawaii, USA, pp. 182-186, August
 Goh, T.B. et al. Design and implementation of a hard disk drive servo
system using robust and perfect tracking approach, The 38th Conference
on Decision and Control, Phoenix, AZ, USA, December 1999.
 Grochowski, E. and Halem, R.D. Technological impact of magnetic hard
disk drives on storage systems, IBM Systems Journal, Vol. 42, No. 2, pp.