METHOD AND SYSTEM FOR PROVIDING SPINDLE MOTOR CONTROL FOR HEAD LOADING IN A DISK DRIVE

摘要

METHOD AND SYSTEM ASPECTC FOR CONTROLLING SPINDLE MOTOR SPEED DURING HEAD LOADING IN A DISK DRIVE ARE DESCRIBED. THE ASPECTS INCLUDE INPUTTING A TIME- VARYING REFERENCE VOLOCITY PROFILE SIGNAL, AND SELECTING A CONTROLLER TO CONTROL SPINDLE MOTOR SPEED. FURTHER INCLUDED IS FEEDING FORWARD CONTROL SIGNALS SUFFICIENT TO PRECOMPENSATE FOR DRAG DURING A HEAD LOADING EVENT AND MAINTAIN SPINDLE MOTOR SPEED WITHIN AN OPERATING TOLERANCE. @FIG. 3.