Control System Design of Multi-Actuator System in hard disk drives for Data-Driven Society

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14680
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 20010:Mechanics and mechatronics-related
• Research Institution: Tokyo City University (2021-2022); Nagoya University (2020)
• Principal Investigator: Yabui Shota 東京都市大学, 理工学部, 准教授 (90800756)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 磁気ディスク装置 / マルチアクチュエータ / 位置決め制御 / 外乱補償 / 振動制御

Outline of Final Research Achievements

In the development of the information society in recent years, the expansion of data servers has been developed to record a large amount of digital data from all over the world. The digital data is recorded for the hard disk drives in the data server. The recording capacity of the hard disk drive is directly linked to the expansion of the data server. The recording capacity of a magnetic disk drive depends on the positioning accuracy of the magnetic head that reads and writes data on the disk. This research studied the control system design of a multi-stage actuator that can contribute to the improvement of magnetic head positioning accuracy. As a result, the proposed design method is able to improve the positioning accuracy by about 30% compared to the conventional design method. This is expected to contribute to increasing the recording capacity of hard disk drives.

Free Research Field

制御工学

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は学術的には，多入力単出力系の制御系における具体的な設計論の提案という点で有意義なものである．磁気ディスク装置を主眼とした内容であるが，多段アクチュエータを有するシステムの制御系設計にとっても応用できると考えられる．また，社会的には我が国の目指すべき社会像である「データ駆動型社会」の実現に資すると考えられる．本研究により，HDDの磁気ヘッド制御系の精度を向上し記録容量の増大できると期待される．これは，データ駆動型社会に必要な大量のリアルデータの格納場所の提供に繋がると考えられる．