4results about How to "Improve sailing stability" patented technology

The invention belongs to the technical field of seawater fuel cell power generation, and particularly relates to a water circulation fuel cell power system based on seawater hydrogen production and a ship. Comprising a seawater pretreatment unit used for receiving seawater and removing impurities in the seawater; the fuel supply and mixing unit is connected with the seawater pretreatment unit and is used for mixing NaBH4 and seawater to form hydrogen fuel; the hydrogen fuel cell unit is connected with the fuel supplying and mixing unit and is used for generating hydrogen through hydrolysis reaction, converting the hydrogen into direct current and generating circulating water; the circulating unit is respectively connected with the hydrogen fuel cell unit and the fuel supplying and mixing unit and is used for feeding circulating water into the fuel supplying and mixing unit; and the power unit is connected with the hydrogen fuel cell unit and used for providing power for the ship. The seawater directly participates in the hydrolysis reaction of the sodium borohydride to start the system, and the water generated by the fuel cell is recycled, so that a'water-hydrogen-electricity 'closed loop is realized, and the energy density and the space utilization rate of the ship are improved.

The unmanned sailboat wing sail with the telescopic and windward area changing functions comprises a fixed sailboard, a movable sailboard, a linear driving module, an opening and closing blade and a blade adjusting mechanism, the fixed sailboard and the movable sailboard are hollow wing-shaped boards, and the movable sailboard is vertically arranged on the inner side of the fixed sailboard in a sliding mode. The linear driving module drives the movable sailboard to ascend or descend, so that the movable sailboard extends out of or retracts into the inner side of the fixed sailboard. A square window is formed in the movable sailboard, and the multiple opening and closing blades are sequentially arranged on the inner side of the square window from top to bottom and are in running fit with the movable sailboard. The blade adjusting mechanism drives the opening and closing blades to rotate synchronously in the same direction, so that the square window is opened or closed. The height and the windward area of the wing sail are adjusted by introducing the structure of the liftable movable sailboards and the opening and closing blades, so that different wind speeds, sea conditions and sailing requirements are met, the sailing performance of the unmanned sailboat is optimized, the sailing thrust is precisely controlled, and the stability and the safety are improved.

This invention discloses a roll-damping, energy-storage flywheel coordinated control system and method, belonging to the interdisciplinary technical field of ship motion control and shipborne integrated power systems. Applicable to ships and offshore platforms, this invention constructs a coupled dynamic model of the entire system—ship roll, flywheel electromechanical, and ship power grid—and uses a model predictive control framework to solve a multi-objective optimization problem online, dynamically coordinating roll-damping torque demand, flywheel energy storage scheduling, and grid support commands. The system supports power command tracking, virtual synchronous machine control, and grid support modes, and generates motor electromagnetic torque commands and precession servo torque commands. A magnetic levitation bearing auxiliary circuit is used for rotor support and vibration suppression. Based on a sensing, modeling, optimization, and execution intelligent closed loop, deep dynamic coordination and global optimization of the three major functions of roll reduction, energy storage, and active grid support are achieved, effectively improving the motion stability, energy utilization efficiency, and grid operational resilience of ships and offshore platforms under complex sea conditions.

This application relates to the technical field of unmanned surface vessels (USVs), and in particular to a semi-submersible USV, comprising a hull, ballast assembly, and control assembly. The hull includes a base and a canopy, with the canopy fixedly connected to the top of the base. An underwater propulsion unit is mounted at the stern of the base, and a submersible propulsion unit is mounted at the stern of the canopy. The ballast assembly includes a ballast tank and a pumping unit. The ballast tank is mounted on the base, and one end of the pumping unit communicates with the ballast tank, while the other end communicates with the bottom of the base. The control assembly includes a battery, a control unit, and a communication unit. The battery and control unit are mounted inside the base, and the communication unit is fixedly connected to the top of the canopy. The battery and control unit are electrically connected, and the control unit and communication unit are also electrically connected. In calm sea conditions, the hull floats, and the submersible propulsion unit drives the hull, significantly reducing drag during movement. This application effectively reduces energy consumption during navigation.