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Enhanced Track Jump Stability in Optical Disc Drives

광디스크 드라이브에서의 트랙 점프 안정도 향상

  • 유정래 (서울산업대학교 제어계측공학과) ;
  • 도태용 (한밭대학교 제어계측공학과)
  • Published : 2009.07.01

Abstract

Track jump control is a random access strategy for short distance movement. The most common track jump scheme is a bang-bang control of a kick and brake manner. In a conventional track jump scheme, a track-following compensator is turned off during kick and brake periods, and restarted at a target track for track pull-in. The inevitable controller switching with non-zero initial condition results in undesirable transient response, and excessive overshoot in the transient response causes track pull-in failure. In this paper, a new track jump scheme is proposed for enhancing track jump stability. Instead of control switching, internal states of a track-following controller are artificially manipulated for kick and brake actions in a digital control environment. Experimental results are provided in comparison with conventional track jumps.

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