๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

DYNAMICS AND ROBUST CONTROL OF A HIGH SPEED OPTICAL PICKUP

โœ Scribed by S. Lim; T.-Y. Jung

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
294 KB
Volume
221
Category
Article
ISSN
0022-460X

No coin nor oath required. For personal study only.

โœฆ Synopsis

Recently there has been an increasing demand for optical disk drives to have higher speed as well as high information density, especially for applications like CD-ROM drives. To this end improvement of their optical pickup structure and control is recognized as a very challenging issue. In this paper, the pickup is ยฎrst analytically modelled in a plane to describe its coupled auto-focusing and auto-tracking systems. With its immeasurable parameters being estimated based on experimental data, an approximate 1-DOF linear model is obtained neglecting the coupling terms. To design the high speed and robust positional servo controller realistic design speciยฎcations are addressed, and the H I control method is employed. Finally taking as an example the pickup in a commercial CD-ROM drive, the performance of the designed controller is veriยฎed through realtime experiments.

๐Ÿ“œ SIMILAR VOLUMES

Optical OFDM: A promising high-speed opt
Optical OFDM: A promising high-speed optical transport technology
โœ Fred Buchali; Roman Dischler; Xiang Liu ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› Institute of Electrical and Electronics Engineers ๐ŸŒ English โš– 790 KB

Orthogonal frequency division multiplexing (OFDM) is a widely used modulation/multiplexing technology in wireless and data communications. Leveraging recent advances in high-speed complementary metal-oxide semiconductor (CMOS) technologies and optical modulation and detection technologies, optical O

Robust speed control of induction motors
Robust speed control of induction motors: application to a benchmark example
โœ Bader Aloliwi; Hassan K. Khalil; Elias G. Strangas ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 145 KB ๐Ÿ‘ 2 views

A non-linear robust output feedback control is designed for a sixth-order model of an induction motor. The control uses only measurement of the rotor position and stator currents. It contains two observers, a second-order observer to estimate the rotor #ux from the stator current and a third-order h

A robust air-gap flux estimation for spe
A robust air-gap flux estimation for speed sensorless vector control of double-star induction machine
โœ M.F. Mimouni; R. Dhifaoui ๐Ÿ“‚ Article ๐Ÿ“… 2004 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 966 KB

## Abstract The paper presents a new direct fieldโ€oriented control (DFOC) for doubleโ€star induction machine (DSIM) drives using the stator currents. First, we propose a new algorithm to estimate airโ€gap flux for speed sensorless airโ€gap flux orientation control. Compared to the previous DFOC scheme