1. (1) M.D. Sidman and H.S. Hvostov:“Robust Active damping control system”, US 5,459,383 (1994)
2. (2) M. Kobayashi, T. Yamaguchi, T. Yoshida, and H. Hirai:“Carriage Acceleration Feedback Multi-Sensing Controller for Sector Servo Systems”, Inter. Conf. On Micromechatronics for Information and Precision Equipment, pp.475-480 (1997)
3. (4) F.-Y. Huang, W. Imaino, and F. Lee: 「サーボ制御式アクチュエータ.システムを安定化するための能動制御」, 特開平11-317033 (1999)
4. Active damping in HDD actuator