Optimal nonlinear gain tuning of composite nonlinear feedback controller and its application to a hard disk drive servo system. - Weiyao Lan; Chin Kwan Thum; Ben M. Chen (CDC, 2009)

A Unified Control Scheme for Track Seeking and Following of a Hard Disk Drive Servo System. - Chin Kwan Thum; Chunling Du; Ben M. Chen; Eng Hong Ong; Kim Piew Tan (IEEE Trans. Control. Syst. Technol., 2010)

A Hard-Disk-Drive Servo System Design Using Composite Nonlinear-Feedback Control With Optimal Nonlinear Gain Tuning Methods. - Weiyao Lan; Chin Kwan Thum; Ben M. Chen (IEEE Trans. Ind. Electron., 2010)