Performance of convergence-based variable-gain control of optical storage drives

In this paper, a method for the performance assessment of a variable-gain control design for optical storage drives is proposed. The variablegain strategy is used to overcome well-known linear control design trade-offs between low-frequency tracking properties and high-frequency noise sensitivity. A convergence-based control design is proposed that guarantees stability of the closed-loop system and a unique bounded steady-state response for any bounded disturbance. These favourable properties, guaranteed by virtue of convergence, allow for a unique performance evaluation of the control system. Moreover, technical conditions for convergence are derived for the variable-gain controlled system and a quantitative performance measure, taking into account both low-frequency tracking properties and high-frequency measurement noise sensitivity, is proposed. The convergence conditions together with the performance measure jointly constitute a design tool for tuning the parameters of the variab...

• Type: Journal
• Year: 2008
• Where: AUTOMATICA
• Authors: Nathan van de Wouw, H. A. Pastink, Marcel F. Heertjes, Alexey V. Pavlov, Henk Nijmeijer
• Keywords: AUTOMATICA 2008, Control Design, Designs, Noise Sensitivity