Title :
Radial tracking in high-speed DVD players (an application of notch filtering and multirate control)
Author :
Bittanti, Sergio ; Dell´Orto, F. ; Carlo, Andrea Di ; Savaresi, Sergio M.
Author_Institution :
Dipt. di Elettronica e Inf., Politecnico di Milano, Italy
Abstract :
The problem considered is the radial tracking of the optical pick-up in a DVD-ROM. For low-speed players, it is known that this problem can be solved by means of simple lead-lag regulators. For high-speed players, the servo design is much more tricky, and a more sophisticated control scheme is required. The control scheme proposed is constituted by a lead-lag filter, two notch filters and a low-pass filter. This set of filters is implemented in a parallel structure. This architecture is adequate to provide a good radial tracking. The performance of the controller are tested on a real plant, and experimental results are reported
Keywords :
low-pass filters; notch filters; optical tracking; position control; video discs; DVD; Digital Versatile Disc; lead-lag filter; low-pass filter; notch filters; optical pick-up; radial tracking; DVD; Error correction; High speed optical techniques; Laser beams; Low pass filters; Optical devices; Optical filters; Servomechanisms; Surface emitting lasers; Testing;
Conference_Titel :
Decision and Control, 2001. Proceedings of the 40th IEEE Conference on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-7061-9
DOI :
10.1109/.2001.980949