... response model, and a stochastic wind model. The ship maneuvering model is identified with artificial neural networks using measured ship motion data. Subsequently, the control policy under wind disturbances is found by reinforcement learning using the maneuvering simulation environment. The experiment...

... ABSTRACT We are studying a position and heading holding control method for unmanned vessels to measure radiation in seafloor. In the existing method using sliding mode control, the unmanned ship is affected by wind disturbance and oscillates around the target point. To solve this problem, we...

... ABSTRACT The disturbance of seabed sediments during nodule collection is a pivotal consideration in Environmental Impact Assessments (EIA). Developing methods to quantitatively evaluate the disturbance caused by specific engineering solutions for polymetallic nodule collection in deep-sea...

..., and there is a disturbance near the resonant frequency, which emphasizes the influence of the incident wavelength on the nonlinear effect and wave force on the front wall. The total horizontal wave force on the OWC device increases with increasing dimensionless wavelength, but the growth rate decreases. KEY WORDS: OWC...

... with a standard Proportional Integral Derivative controller, and the control system performance is discussed. Lastly, the quality of the control strategy is shown by introducing model errors and unmeasured disturbances. INTRODUCTION Offshore installation real-time monitoring systems are of interest due...

... disturbances make it a great challenge to design a suitable controller to ensure the stable motion and fast dynamic response of the ROV. Much research has been conducted in the area of underwater robots to tackle the problem described above. Yang et al. (2022) proposed a fuzzy sliding mode control (RFSMC...

... pipe vibration cylinder sediment fidelity acquisition module sediment disturbance sampler module sampling system characteristic steel pipe underwater sediment fidelity acquisition module stratified water sample deformation monitoring design Proceedings of the Thirty-fourth...

... machine learning target path cross-track error evolutionary algorithm drift angle los guidance law guidance law ship adrc coordinate system grey wolf optimization derivative gwo artificial intelligence controller disturbance course controller rejection control parameter tuning...

... rov electrical industrial apparatus upstream oil & gas modeling & simulation machine learning europe government sub-sea system optimization problem artificial intelligence remotely operated vehicle prediction model control method external disturbance controller trajectory...

... ABSTRACT Work-class ROVs are always subject to external disturbances and system uncertainties. The sliding mode control is an effective method to overcome the disturbances, but its chattering phenomenon restricts its practical application on ROVs. In this paper, we propose a model-free...

... ABSTRACT This paper proposes a new algorithm for the floating of the underwater platform. To eliminate the effect of the disturbance and improve the safety of the floating process, a fuzzy PID algorithm with a nonlinear feedback technique is used to control the underwater platform. Compared...

... is actuated based on the DT modeling of float heave and roll including the effect of the moving mass, informed by the assimilation of past float motions and, optionally, using phase-resolved wave data at the float (either measured or predicted based on a separate model) incorporating disturbance previewing...

.... In the sea area where the USV is used, there are disturbances such as wind, current, waves, which make it difficult to maintain the position. To solve this problem, we devised a position control method that dynamically adds correction inputs using a neural network. INTRODUCTION We have been studying...

... on the combination of normalization and pseudo-inverse method is adopted in this paper. The simulation results show that the designed controller is of excellent robustness to uncertain disturbances. INTRODUCTION With the increasing demand for seafood in human society, the aquaculture industry has developed...

... uncertainties, environmental disturbances, input saturation, and output constraints. The guided DP tracking control problem is first addressed based on reference filters. Then, the NN technology and robust term are fused into vectorial backstepping procedure to realize the adaptability to uncertainties...

... pore water international ocean lake sediment disturbance sediment antarctica sampler module water sample antarctic ozone hole climate change high-fidelity thirty-second pipe polar lake efficiency polar engineering conference proceedings ABSTRACT Polar lake sediment...

... mining vehicle deep-sea mining vehicle plate sinkage displacement interaction metals & mining sinkage simulation numerical simulation disturbance dynamic response characteristic formula different size pressure-sinkage model Proceedings of the Thirty-second (2022) International Ocean...

... root subsea system coefficient wind speed rotation matrix offshore wind turbine turbulent wind disturbance ABSTRACT The work studies the lifting of offshore wind turbine blade in turbulent wind. First, a 6-DOF system for the single blade is developed. Then, the work gives a closed-loop...

... mooring system downtime berth 1 original breakwater length vertical quay plan quay plan disturbance incident wave height subsea system marine transportation ship slope type quay plan berth breakwater length container vessel breakwater length plan wave height Proceedings...

... SAMPLING AND PULL-UP TEST (S&PUT) Fig. 1 compares the concept of S&PUTs and that of standard penetration tests (SPTs) which are most widely used for geotechnical investigations. The basic concept of these two test methods is identical in that, both sampling of disturbed soil samples and sounding...