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A fuzzy scheduling controller for a computer disk file track-following servo

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3 Author(s)
Jia-Yush Yen ; Nat. Taiwan Univ., Taipei, Taiwan ; Gu Jeng Wang ; Yung-Yaw Chen

A fuzzy scheduling capability is superimposed on a computer disk drive track-following servocontroller to adjust for the plant variation as the actuator is locked onto different tracks on the disk. The fuzzy algorithm is found to best represent the complex relationship among the controllers for various tracks. Models of a Zentek 3100 disk drive actuator as it locks on a number of different tracks are experimentally identified to be the reference points. H design technique is employed to obtain a robust optimal controller for each reference point. The actual controller for the disk drive actuator is calculated using fuzzy interpolation. It is shown that with the controller scheduling action, the closed-loop performance is improved for the actuator at every track position. Error can be kept at a lower level than is the case when only a single controller is used

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:40 ,  Issue: 2 )

Date of Publication:

Apr 1993

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