DocumentCode :
3296102
Title :
Track following control of large capacity flexible disk drive with disturbance observer using two position sensors
Author :
Ueda, Jun ; Imagi, Akihiko ; Tamayama, Hitoshi
Author_Institution :
Adv. Technol. R&D Center, Mitsubishi Electr. Corp., Hyogo, Japan
fYear :
1999
fDate :
1999
Firstpage :
144
Lastpage :
149
Abstract :
We propose a track following control for large capacity flexible disc drives (FDDs) with a disturbance observer using two position sensors: an optical tracking sensor for large capacity mode; and a magnetic scale for compatible mode. The disk drive requires high resistance against vibration and drive tilting. One of the effective solutions is a disturbance observer. However, as tracking sensor outputs only a tracking error signal, there exists a problem in that the information required to design a 2-DOF controller is lacking. As two position sensor systems are indispensable in building a backwards compatible large capacity FDD, a 2-DOF track following controller can easily be designed. We show that a disturbance observer based controller with single positioning sensor is nothing more than a 1-DOF high gain controller which can easily become unstable and our proposed controller improves disturbance reduction satisfactorily
Keywords :
disc drives; observers; optical sensors; optical tracking; position control; disturbance observer; flexible disk drive; high gain controller; magnetic scale; optical tracking sensor; position sensors; track following control; tracking sensor; Buildings; Capacitive sensors; Control systems; Disk drives; Error correction; Magnetic sensors; Optical control; Optical sensors; Sensor systems; Signal design;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced Intelligent Mechatronics, 1999. Proceedings. 1999 IEEE/ASME International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5038-3
Type :
conf
DOI :
10.1109/AIM.1999.803157
Filename :
803157
Link To Document :
بازگشت