Inspec keywords: control system synthesis; time optimal control; disc drives; hard discs; servomechanisms; position control; discrete time systems; variable structure systems; robust control

Other keywords: overshoot; hard disk drives; time-varying sliding mode control design; robustness; discrete-time sliding mode proximate time optimal seek control; chattering; track seeking; track-following control

Subjects: Actuating and final control devices; Multivariable control systems; Control system analysis and synthesis methods; Storage on moving magnetic media; Discrete control systems; Optimal control; Stability in control theory