71 citations · 237 across the 13 of their papers we have counts for
13 papers
Quantitative Evaluation of Full-Scale Ship Maneuvering Characteristics During Berthing and Unberthing
Agnes N. Mwange, Yoshiki Miyauchi, Taichi Kambara +3
Leveraging empirical data is crucial in the development of accurate and reliable virtual models for the advancement of autonomous ship technologies and the optimization of port ope…
Perspective on the Marine Simulator for Autonomous Vessel Development
Ryouhei Sawada, Yoshiki Miyauchi, Suisei Wada +5
There is a growing demand for simulators for the research and development of maritime autonomous surface ships (MASS) and the approval of autonomous navigation algorithms. Simulato…
Data Augmentation Methods of Dynamic Model Identification for Harbor Maneuvers using Feedforward Neural Network
Kouki Wakita, Yoshiki Miyauchi, Youhei Akimoto +1
A dynamic model for an automatic berthing and unberthing controller has to estimate harbor maneuvers, which include berthing, unberthing, approach maneuvers to berths, and entering…
Covariance Matrix Adaptation Evolutionary Strategy with Worst-Case Ranking Approximation for Min--Max Optimization and its Application to Berthing Control Tasks
Atsuhiro Miyagi, Yoshiki Miyauchi, Atsuo Maki +3
In this study, we consider a continuous min--max optimization problem whose objective function is a black-box. We propose a…
Ship trajectory planning method for reproducing human operation at ports
Rin Suyama, Yoshiki Miyauchi, Atsuo Maki
Among ship maneuvers, berthing/unberthing maneuvers are one of the most challenging and stressful phases for captains. Concerning burden reduction on ship operators and preventing…
Development of a Mathematical Model for Harbor-Maneuvers to Realize Modeling Automation
Yoshiki Miyauchi, Youhei Akimoto, Naoya Umeda +1
A simulation environment of harbor maneuvers is critical for developing automatic berthing. Dynamic models are widely used to estimate harbor maneuvers. However, human decision-mak…
Experimental Low-speed Positioning System with VecTwin Rudder for Automatic Docking (Berthing)
Dimas M. Rachman, Yusuke Aoki, Yoshiki Miyauchi +2
A VecTwin rudder system comprises twin fishtail rudders with reaction fins to increase its performance. With a constant propeller revolution number, the vessel can execute special…
Collision probability reduction method for tracking control in automatic docking / berthing using reinforcement learning
Kouki Wakita, Youhei Akimoto, Dimas M. Rachman +3
Automation of berthing maneuvers in shipping is a pressing issue as the berthing maneuver is one of the most stressful tasks seafarers undertake. Berthing control problems are ofte…
Warm-started Semionline Trajectory Planner for Ship's Automatic Docking (Berthing)
Dimas M. Rachman, Atsuo Maki, Yoshiki Miyauchi +1
In the usual framework of control, a reference trajectory is needed as the set point for a feedback controller. This reference trajectory can be generated by solving a trajectory o…
System Parameter Exploration of Ship Maneuvering Model for Automatic Docking / Berthing using CMA-ES
Yoshiki Miyauchi, Atsuo Maki, Naoya Umeda +2
Accurate maneuvering estimation is essential to establish autonomous berthing control. The system-based mathematical model is widely used to estimate the ship's maneuver. Commonly,…
On Neural Network Identification for Low-Speed Ship Maneuvering Model
Kouki Wakita, Atsuo Maki, Umeda Naoya +4
Several studies on ship maneuvering models have been conducted using captive model tests or computational fluid dynamics (CFD) and physical models, such as the maneuvering modeling…
Optimization on Planning of Trajectory and Control of Autonomous Berthing and Unberthing for the Realistic Port Geometry
Yoshiki Miyauchi, Ryohei Sawada, Youhei Akimoto +2
To realize autonomous shipping, autonomous berthing and unberthing are some of the technical challenges. In the past, numerous research have been done on the optimization of trajec…
Saddle Point Optimization with Approximate Minimization Oracle and its Application to Robust Berthing Control
Youhei Akimoto, Yoshiki Miyauchi, Atsuo Maki
We propose an approach to saddle point optimization relying only on oracles that solve minimization problems approximately. We analyze its convergence property on a strongly convex…