Measurement of Rolling Period by IMU and Estimation of Metacentric Height

Ensuring sufficient stability is crucial for the safe operation of a ship, while stability can decrease during a voyage. One method for real-time estimation of stability magnitude is through the rolling period. Being aware of the natural period is beneficial in preventing synchronous and parametric rolling, phenomena linked to significant cargo damage. In this study, the authors installed Inertial Measurement Unit (IMU) on a full-scale ship and collected motion data. In addition to an industrial-grade Micro-Electro-Mechanical Systems (MEMS)-IMU, the authors also utilized a smartphone in which a consumer-grade MEMS-IMU is embedded. The IMU consists of gyro and acceleration sensors, and the authors compared the performance of these two sensors. The authors applied time-frequency analysis to the motion data to compute the rolling frequency/period. The authors assessed the accuracy of the estimated GM from the rolling period against the one obtained from condition calculations. The findings indicate that the gyro sensor is better suited for measuring the rolling period. Although it observed that a ship does not always roll at the same period; by considering the most frequently occurring period as the natural period, GM can be estimated with an error of less than 10%.

• Record URL:
  • https://doi.org/10.9749/jin.151.56
• Record URL:
  • https://www.jstage.jst.go.jp/article/jin/151/0/151_56/_pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=Measurement+of+Rolling+Period+by+IMU+and+Estimation+of+Metacentric+Height&author=T.+KOMORI&author=N.+KUBO&publication_year=2024
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03887405
• Authors:
  • Komori, Takeshi
  • Kubo, Nobuaki
• Publication Date: 2024

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 56-63
• Serial:
  • The Journal of Japan Institute of Navigation
  • Volume: 151
  • Publisher: Japan Institute of Navigation
  • ISSN: 0388-7405
  • EISSN: 2187-3275
  • Serial URL: https://www.jstage.jst.go.jp/browse/jin/-char/en

Subject/Index Terms

• TRT Terms: Automatic vehicle monitoring; Inertial forces; Marine safety; Rolling; Ship dynamic stability
• Subject Areas: Marine Transportation; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 01945948
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Feb 13 2025 11:38AM