Open AccessNon-linearity Analysis of Ship Roll Gyro-stabilizer Control System
Author(s) -
P Sathit,
C Chatchapol,
I Phansak
Publication year - 2021
Publication title -
sustainable marine structures
Language(s) - English
Resource type - Journals
ISSN - 2661-3158
DOI - 10.36956/sms.v3i1.316
Subject(s) - control theory (sociology) , stabilizer (aeronautics) , gyroscope , frequency domain , time domain , linearity , amplitude , ship motions , drag , linear system , computer science , physics , mathematics , engineering , mechanics , marine engineering , control (management) , mathematical analysis , aerospace engineering , optics , electronic engineering , artificial intelligence , hull , computer vision
A gyro-stabilizer is the interesting system that it can apply to marine vessels for diminishes roll motion. Today it has potentially light weight with no hydrodynamics drag and effective at zero forward speed. The twin-gyroscope was chosen. Almost, the modelling for designing the system use linear model that it might not comprehensive mission requirement such as high sea condition. The non-linearity analysis was proved by comparison the results between linear and non-linear model of gyro-stabilizer throughout frequency domain also same wave input, constrains and limitations. Moreover, they were cross checked by simulating in time domain. The comparison of interested of linear and non-linear close loop model in frequency domain has demonstrated the similar characteristics but gave different values at same frequency obviously. The results were confirmed again by simulation in irregular beam sea on time domain and they demonstrate the difference of behavior of both systems while the gyro-stabilizers are switching on and off. From the resulting analysis, the non-linear gyro-stabilizer model gives more real results that correspond to more accuracy in a designing gyro-stabilizer control system for various amplitudes and frequencies operating condition especially high sea condition.