High Precision Tracking Control based on Pseudo-Inverse Feedforward Control System for Next-Generation Optical Disks

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概要

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• Optical disk drive systems must realize high-precision tracking control. For this purpose, we have already proposed a tracking control system that is composed of a high gain servo controller (HGSC) and a perfect tracking controller (PTC). The conventional feedforward tracking control system adequately suppresses the tracking error caused by track eccentricity. However, the PTC system in the conventional system is complicated. Therefore, the PTC system embedded on a digital signal processor (DSP) cannot realize fast sampling time and the conventional system has a speedup limitation in the optical disk tracking control system. Hence, in this paper, we propose a new high-speed and high-precision feedforward tracking control system that uses a pseudo-inverse matrix. The proposed system consists of the pseudo-inverse feedforward control (P-IFFC). The proposed system realizes simple and quick execution in a digital signal processor software servo. Our experimental results confirm that the proposed system effectively suppresses the tracking error under a condition of the 7200 rpm disk rotation speed of DVD+R. In addition, the conventional systems and the proposed system with a pseudo-inverse matrix are compared in terms of processing time and tracking error.

• 2012-08-25

著者

• Ohishi Kiyoshi

  Department Of Electrical Engineering Nagaoka University Of Technology

• Koide Daiichi

  Science & Technical Research Laboratories Nhk (japan Broadcasting Corporation)

• Tokumaru Haruki

  Science & Technical Research Laboratories Nhk (japan Broadcasting Corporation)

• Miyazaki Toshimasa

  Department Of Electrical Engineering Nagaoka University Of Technology

• Nakazaki Tatsuya

  Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

• Ogata Tokoku

  Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

• Takano Yoshimichi

  NHK Engineering Services, Inc., Setagaya, Tokyo 157-8540, Japan

• Takano Yoshimichi

  NHK Engineering Service, Inc., 1-10-11 Kinuta, Setagaya, Tokyo 157-8510, Japan

• Sakimura Naohide

  Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

• Miyazaki Toshimasa

  Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

• Miyazaki Toshimasa

  Department of Electrical and Electronic Systems Engineering, Nagaoka National College of Technology, Nagaoka, Niigata 940-8532, Japan

• Tokumaru Haruki

  Science and Technology Research Laboratories, Japan Broadcasting Corporation, Setagaya, Tokyo 157-8510, Japan

• Ohishi Kiyoshi

  Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan

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