학술논문
Robust feedforward tracking servo system for optical disk recording system
Document Type
Conference
Author
Source
IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.37243) Industrial electronics - Denver Industrial Electronics Society, 2001. IECON '01. The 27th Annual Conference of the IEEE. 3:1710-1715 vol.3 2001
Subject
Language
Abstract
This paper proposes a new robust feedforward tracking control system for optical disk recording system, which is based on both "zero phase error tracking" (ZPET) control and a robust feedback control using disturbance observer and coprime factorization. Optical disk recording systems must have a quick and precise tracking control whose error is less than 0.1 /spl mu/m for a position reference with amplitude of 100 /spl mu/m. For this purpose, optical disk recording systems should be regulated by feedforward control and robust control. However, the detection signal is only a tracking error and the position reference cannot be obtained. Therefore, this paper proposes a new estimation method of the position reference by using only tracking error, and realizes a quick and precise tracking control based on feedforward control and robust control.