Your Search Results

Use this resource - and many more! - in your textbook!

AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.

Experience the freedom of customizing your course pack with AcademicPub!
Not an educator but still interested in using this content? No problem! Visit our provider's page to contact the publisher and get permission directly.

TMR Analysis and Controller Design for Self - ServoWriting in High-Density Hard Disk Drives

By: You Yi Wang; Ang, K.; Feng Dan Dong;

2006 / IEEE / 1-4244-0341-3

Description

This item was taken from the IEEE Conference ' TMR Analysis and Controller Design for Self - ServoWriting in High-Density Hard Disk Drives ' This paper analyzed and modeled the major contributors of Track Misregistration (TMR) in HDD Self Servowriting (SSW). Self Servowriting is a process whereby the position and timing burst information are written on the disk surface by using the servo information from previously written tracks as seed tracks for writing the burst information on the remaining tracks. One of the most significant issues in this process is Radial Error Propagation which is built up while successive tracks are written. These written-in disturbances are main source of the Repeatable Runout (RRO) which may greatly degrade the HDD servo performance. In this paper, in order to improve the SSW servo performance with higher density, we designed the servo controller by using loop shaping method which is able to achieve higher bandwidth and better error rejection. To minimize the Radial Error Propagation, we further designed the feed-forward compensator using the identified disturbances models, to reduce the written-in RRO. Simulation results illustrate the capability of the proposed compensators.