Guo, G. et al. A DSP based hard disk drive servo test stand, IEEE
Transactions on Magnetics, Vol. 34, No. 2, pp. 480-482, March 1998.
 Guo, G., Hao, Q. and Low, T.S. A dual-stage control design for high
track per inch hard disk drives, IEEE Transactions on Magnetics,Vol.
37, No. 2, Part 1, pp. 860-865, March 2001.
 Guo, G. and Zhang, J. Feedforward control for reducing disk- fl utter-
induced track misregistration, IEEE Transactions on Magnetics,Vol.
39, No. 4, pp. 2103-2108, July 2003.
 Guo, G. et al. Active Control System and Method for Reducing Disk Flut-
ter induced Track Misregistrations, US patent 6,888,694, May 3, 2005.
 Guo, L., Martin, D. and Brunnett, D. Dual-stage actuator servo control
for high density disk drives, Proceedings of the 1999 IEEE/ASME Inter-
national Conference on Advanced Intelligent Mechatronics, pp. 132-137,
 Guo, L. and Chen, Y. Disk fl utter and its impact on HDD servo perfor-
mance, IEEE Transactions on Magnetics, Vol. 37, No. 2, pp. 866-870,
 Guo, W. et al. Dual stage actuators for high design rotating memory
devices, IEEE Transactions on Magnetics, Vol. 34, No. 2, pp. 450-455,
 Guo, W. et al. Linear quadratic optimal dual-stage servo control systems
for hard disk drives, Proceedings of the 24th Annual Conference of the
IEEE Industrial Electronics Society, IECON'98, Aachen, Germany, Vol.
3, pp. 1405-1410, August 31-September 4, 1998.
 Hamdi, E.S. Design of Small Electrical Machines, John Willey and Sons,
 Hanselman, D.C. Brushless Permanent Magnet Motor Design,McGraw-
 Hanselmann, H. and Mortix, W. High-bandwidth control of the head-
positioning mechanism in a winchester disk drive, IEEE Control Systems
Magazine, Vol. 7, No. 5, pp. 15-19, October 1987.
 Hao, Q. et al. A gradient based track-following controller optimization
for hard disk drive, IEEE Transactions on Industrial Electronics,Vol.
50, No. 1, pp. 108-115, February 2003.
 Hara, S. et al. Repetitive control systems: a new type servo system for
periodic exogenous signals, IEEE Transactions on Automatic Control,
Vol. 33, No. 7, pp. 659668, July 1988.