Abstract
The invention relates to methods for prediction of parametric rolling of vessels. The methods are based on frequency domain and time domain information in order do set up a detector able to trigger an alarm when parametric roll is likely to occur. The methods use measurements of e.g. pitch and roll oscillations and compare the measured oscillations using FFT analysis of signal correlations, variance analysis of signals and other comparisons. As an example, the presence of a growing peak around a frequency that doubles the roll natural frequency indicates the possibility that parametric roll is going to happen. L
Original language | English |
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Patent number | WO10118752 |
Filing date | 21/10/2010 |
Country/Territory | International Bureau of the World Intellectual Property Organization (WIPO) |
Publication status | Published - 2010 |
Bibliographical note
Patent:No.: EP157857