Influence of Active Control Strategy on the Motion Compensation at the Truncated Point of Mooring Line

The maximum predicting error of the commonly used passive truncated mooring system method may reach 30% due to the difference of dynamic characteristics between the truncated and full-depth mooring line. In this paper, the experimental strategy called three-parameter (displacement, velocity and acce...

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Bibliographic Details
Published in:China ocean engineering 2021-09, Vol.35 (5), p.700-711
Main Authors: Qiao, Dong-sheng, Yin, Li, Yan, Jun, Tang, Wei, Ning, De-zhi, Li, Bin-bin, Ou, Jin-ping
Format: Article
Language:English
Subjects:
Acceleration
Active control
Coastal Sciences
Compensation
Control
Control methods
Displacement
Dynamic characteristics
Dynamic equivalents
Engineering
Equivalence
Fluid- and Aerodynamics
Marine & Freshwater Sciences
Mathematical models
Model testing
Mooring
Mooring lines
Mooring systems
Motion compensation
Numerical and Computational Physics
Oceanography
Offshore Engineering
Parameters
Simulation
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Summary:The maximum predicting error of the commonly used passive truncated mooring system method may reach 30% due to the difference of dynamic characteristics between the truncated and full-depth mooring line. In this paper, the experimental strategy called three-parameter (displacement, velocity and acceleration) active control method at the truncated point of mooring line is established to implement the synchronous equivalent of motion and force, and the realization of active truncated mooring system for model test is studied theoretically. The influences of three-parameter and one-parameter (displacement) active control strategies on the compensation effects are compared by numerical study. The results show that the established three-parameter active control method can feasibly realize the static and dynamic equivalent of truncated and full-depth mooring system, laying a good foundation for the following physical model test of active truncated mooring system.
ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-021-0062-8