FAULT PREDICTIVE CONTROL OF COMPACT DISK PLAYERS

Fault Predictive Control of Compact Disk Players

Optical disc players such as CD-players have problems playing certain discs with surface faults like scratches and fingerprints. The problem is to be found in the servo controller which positions the optical pick-up, such that the laser beam is focused on the information track. A scheme handling this problem, called feature based control, has been presented in an other publications of the first...

Linear Quadratic Controller with Fault Detection in Compact Disk Players

The design of the positioning controllers in Optical Disk Drives are today subjected to a trade off between an acceptable suppression of external disturbances and an acceptable immunity against surfaces defects. In this paper an algorithm is suggested to detect defects of the disk surface combined with an observer and a Linear Quadratic Regulator. As a result, the mentioned trade off is minimiz...

Feature Based Control of Compact Disc Players

Several new types of optical disc standards have reached the market during the past years, from the well known Compact Disc (CD), and its computer version CD-ROM, through the Digital Versatile Disc (DVD) to the new high density discs, eg. Blu-Ray discs. All these standards have potential problems with surface faults like scratches and fingerprints. Many users have suddenly encountered the probl...

Compact Endomorphisms of Certain Subalgebras of the Disk Algebra

Proactive Fault-Tolerant Model Predictive Control

Fault-tolerant control methods have been extensively researched over the last 10 years in the context of chemical process control applications, and provide a natural framework for integrating process monitoring and control aspects in a way that not only fault detection and isolation but also control system reconfiguration is achieved in the event of a process or actuator fault. But almost all t...