Title :
Optimization of initial value compensation for settle control in hard disk drives
Author :
Li, Yunfeng ; Sun, Yu ; Smith, Craig ; Guo, Lin ; Guo, Wei
Author_Institution :
Adv. Technol. Group, Maxtor Corp., Milpitas, CA, USA
Abstract :
A method is proposed for optimal settle control using one-degree-of-freedom (1-DOF) control and initial value compensation (IVC) in hard disk drives. A feedforward control signal is injected into the control system during settle control to compensate the initial conditions when switching from seek to settle control. A transfer matrix from initial conditions to feedforward control input is calculated by least-square optimization to minimize a cost function defined by position error, control effort, and jerk. Simulation and experimental results are presented.
Keywords :
disc drives; hard discs; least squares approximations; optimal control; optimisation; control system; cost function; feedforward control signal; hard disk drives; initial value compensation; least square optimization; mode switching control; optimal settle control; position error; transfer matrix; Control systems; Cost function; Design methodology; Design optimization; Equations; Error correction; Hard disks; Optimal control; Polynomials; Velocity control; Initial value compensation (IVC); mode switching control; seek control; settle control;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.840308
