19 results about "Ship stability" patented technology

The invention relates to the technical field of ship energy efficiency management, and discloses an energy efficiency improvement method and system based on course-speed-trim collaborative optimization, which constructs a course feature code based on navigation environment forecast information and electronic chart information, and combines real-time state information and decision variables of a ship to improve the energy efficiency of the ship. Generating voyage number accumulated energy consumption expectation by using a ship energy consumption prediction model fused by physical information; taking expectation minimization as a target, coupling navigation time constraints, host working condition constraints and ship stability safety boundaries, constructing a three-variable collaborative optimization model of the route path, the planned navigational speed of each route segment and the planned trim value, solving the model, and outputting a collaborative optimization scheme; and on-line parameter adaptive updating is performed on the model based on real-time data during navigation, and dynamic re-planning is triggered. The global voyage number energy consumption optimization is realized through a three-variable collaborative optimization framework and physical information fusion prediction, and the adaptability and robustness of an optimization scheme in a dynamic environment are improved by means of an online learning and rolling optimization mechanism.

The invention relates to the technical field of ship stability control, discloses a ship stability control method and system, and introduces a real-time monitoring and adaptive adjustment mechanism for electrical parameters of a ballast pump driving motor. By acquiring the electrical parameter reference information of the ballast pump driving motor in the reference pipeline state, a dynamic performance evaluation reference is established. In the ballast water dispatching process, the system synchronously monitors the real-time electrical operation parameters of the ballast pump driving motor and compares the real-time electrical operation parameters with the reference information, and therefore whether the actual conveying efficiency of the ballast water system is lower than the expectation or not can be accurately judged in real time. The real-time judgment mechanism does not exist in the prior art, and the system can find and quantify the performance deviation in time.

The invention discloses a method for determining optimal water surface stability and underwater motion performance of a dual-mode unmanned sailboat. Firstly, based on ship stability specifications, the water surface initial stability height of a sailing ship under different heavy hammer masses is calculated, and the initial stability height range is determined; secondly, ship body recovery torque and wind tilting torque are calculated, static and dynamic heeling angles are determined, and the initial stability high range of the ship body is further narrowed; thirdly, calculating underwater stability, establishing an underwater motion model, and obtaining a hydrodynamic coefficient; then, simulation is carried out based on the underwater motion model, and the limit pitch angle and rising / diving height performance under different parameters are calculated. And finally, constructing a multi-objective optimization model and solving an optimal parameter combination. And selecting an optimal compromise scheme based on an ideal point method, and determining the final weight mass and propeller mounting angle. Unified optimization of the dual-mode performance is achieved, and the design efficiency and the comprehensive performance of the aircraft are remarkably improved.

This invention belongs to the field of cargo stowage technology and provides an AI-based self-learning system for general cargo stowage operations. The system includes: simulating the loading of general cargo using digital twin and AI technologies, outputting several simulated loading schemes; acquiring data on the loading location, unloading sequence, weight, additional unloaded cargo quantity, and cargo hold weight distribution for each scheme; establishing an unloading status analysis model based on the loading location, unloading sequence, and additional unloaded cargo quantity to generate a comprehensive score for unloading rationality; generating a stacking safety risk score based on the loading location and weight; establishing a balance analysis model based on the weight distribution data to generate a balance risk score; and generating the optimal simulated loading scheme by combining the above scores, thereby determining the stowage operation scheme. This invention, through multi-dimensional risk quantification and a self-learning mechanism, achieves intelligent optimization of general cargo stowage schemes, improving unloading efficiency, cargo safety, and ship stability.

The embodiment of the invention provides a method and device for determining the vehicle parking position of a roll-on-roll-off ship, and the method comprises the steps: screening out a candidate position set allowing the vehicle to be parked from a target roll-on-roll-off ship according to a preset public constraint condition and a loading direction constraint condition; aiming at each candidate position in the candidate position set, simulating that a current to-be-distributed vehicle in a queuing sequence of to-be-ferried vehicles is parked at the candidate position, and according to the current ship loading state, through the first interpolation function, the second interpolation function and the third interpolation function, calculating the ship stability height after simulation loading; and selecting the position enabling the estimated total load capacity of the target roll-on-roll-off ship to be maximum as the final parking position of the current to-be-distributed vehicle from the candidate positions with the stability height within a preset safety threshold range obtained through calculation. On the premise of guaranteeing the stability and safety of the ship, the loading efficiency and economic benefits can be maximized, and an executable parking scheme is output.

The invention discloses a method for calculating rolling and self-rolling periods of a ship. The method comprises the steps that inherent parameters of a ship are obtained, and the inherent parameters at least comprise the maximum width B of a hull plate of the ship, the type draft d under the calculated loading condition, the maximum heeling angle theta m, the height zg from the gravity center of the ship to a base line and the radius R of rotational inertia of the ship under the calculated loading condition; the inherent parameters are substituted into a rolling and self-shaking period calculation formula, and the rolling and self-shaking period T of the ship under the maximum heeling angle theta m within the range smaller than the water inlet angle is obtained through calculation. According to the ship stability monitoring method, the ship rolling and self-rocking period can be expressed according to related indexes of the width, the draught depth, the gravity center position and the maximum heeling angle of the ship body, the corrected and optimized rolling period formula and the relation between the rolling period formula and the stability are obtained, and a scientific basis and an accurate calculation method are provided for ship stability monitoring.

The application discloses a polar ship icing condition limit stability evaluation method and system, and the method comprises the following steps: obtaining ship data and environmental parameters, inputting a dynamic icing calculation model, and calculating the ship icing distribution; obtaining the ship stability righting lever curve according to the real-time motion state of the ship and the ship icing distribution, processing the ship stability righting lever curve, and obtaining the dynamic stability curve; calculating the limit dynamic inclination and the maximum dynamic inclination lever under different icing conditions based on the dynamic stability curve, and solving the limit wind speed and the wind scale that can be borne by the ship under different icing conditions according to the calculation results, and comprehensively evaluating and judging the limit stability of the polar ship. The application realizes the dynamic update of the icing distribution with the change of the ship motion state by obtaining the state change parameters corresponding to the ship at each time step based on the six-degree-of-freedom motion equation of the ship, and the total amount of flying spray is calculated by combining the sea wave spray and the wind-generated flying spray, so that the ship stability analysis combines the icing and the wind wave, and the accuracy and the reliability of the stability evaluation are improved.

The invention discloses a ship weight and gravity center actual position measuring method, which is characterized by comprising the following steps in sequence: A, preparation work, B, data acquisition and C. According to the method, detection is carried out by directly utilizing the inclination change of a ship body in the process of filling fuel oil or ballast water into an empty ship, additional operation procedures are not needed, and the cost is reduced. According to the method, the gravity center coordinates of the ship are accurately measured by utilizing a moment balance principle and an inclination angle formula, ship floating states in two or more states (including an empty ship state) are accurately measured, an equation set is established, and the weight and the gravity center three-dimensional coordinates of the empty ship are used as unknown quantities to be solved. And carrying out average calculation on the final result to finally obtain four important ship stability basic parameters of the high-precision empty ship weight W and the ship barycentric coordinates XG, YG and ZG.

The present application relates to the technical field of ship energy efficiency management, and discloses an energy efficiency improvement method and system based on route-speed-drag force collaborative optimization, which constructs route feature coding based on sailing environment prediction information and electronic chart information, combines with real-time state information and decision variables of the ship, and generates voyage cumulative energy consumption expectation by using a ship energy consumption prediction model of physical information fusion; taking the minimization of the expectation as the goal, coupling sailing time constraints, main engine working condition constraints and ship stability safety boundaries, a three-variable collaborative optimization model of route path, planned speed of each voyage section and planned drag force value is constructed and solved, and a collaborative optimization scheme is output; in the sailing, the model is updated online based on real-time data and dynamic re-planning is triggered. Through the three-variable collaborative optimization framework and physical information fusion prediction, global voyage energy consumption optimization is realized, and with the help of online learning and rolling optimization mechanism, the adaptability and robustness of the optimization scheme in the dynamic environment are improved.

The invention belongs to the technical field of channel improvement building damage event prediction methods, and particularly relates to a channel improvement building damage off-site law enforcement method based on multi-source spatio-temporal data. The multi-source spatio-temporal data comprises ship AIS data, ship report data, historical ship report data, a channel improvement building data set, real-time tide level data, ship stability characteristic data, ship radar scanning data, video monitoring and intelligent identification data and meteorological real-time data; building collision risk scenes are improved according to three types of channels including unintentional collision, hydrological influence and illegal navigation, and corresponding off-site law enforcement algorithms are executed respectively; and sequentially operating a first arrival crew identification algorithm, a high-risk water area identification algorithm in the tidal fluctuation and ebb period and a trajectory-based off-site law enforcement algorithm to realize collision risk judgment.

This invention provides a method, apparatus, equipment, and storage medium for controlling loads on a crane vessel. It acquires real-time environmental parameters, load parameters, and crane vessel operational parameters via sensors. These parameters are input into a parameter generation model to obtain initial control parameters. The initial control parameters are then optimized using a fitness function to obtain target control parameters. Based on these target control parameters, the crane vessel is controlled to move the load to the target position. This invention effectively reduces positional errors during load operation and significantly improves the accuracy of load control by real-time acquisition of environmental parameters, load parameters, and crane vessel operational parameters, and by introducing a parameter generation model and a fitness function to optimize the control parameters. Furthermore, by evaluating the control parameters using a fitness function and incorporating vessel stability, load operation accuracy, and task completion into the optimization objectives, it effectively improves load movement efficiency, shortens operation time, and enhances operation quality.

This invention discloses a fishery aquaculture vessel with a double-ring modular aquaculture tank and its implementation method. By designing a double-ring aquaculture tank composed of concentric cylinders in the aquaculture vessel, where the inner cylinder and outer ring space are used as independent aquaculture tanks, the stability and uniformity of water flow are effectively improved, reducing water flow turbulence and energy waste. The double-ring design can significantly reduce the impact of free surface effects on ship stability and the aquaculture environment. The conical boundary design helps reduce water ripples and promotes the concentrated sedimentation of aquaculture waste to the collection trap in the center of the tank bottom, facilitating waste discharge and cleaning. In addition, the smooth surface design reduces marine organism attachment and lowers the difficulty of removal. The modular design of the double-ring aquaculture tank can be carried out in parallel with ship construction, which can significantly shorten the shipbuilding cycle and reduce construction costs.

This invention discloses a collision avoidance and early warning method and system for hydraulic ship locks based on digital twins, belonging to the field of intelligent shipping technology. The system uses a sensor array and unmanned surface vessel (USV) multibeam sonar technology to perceive the navigation status and topographic features of the lock area in real time. It preprocesses and acquires dynamic behavior data sets and three-dimensional contour information data. Based on fluid mechanics and finite element technology, it constructs a dynamic digital twin simulation model, extracts the dynamic behavior data sets, calculates the ship dynamic stability index (PWD) for ship stability analysis, and performs deposition coupling analysis when the ship is stable. It calculates the deposition coupling response index (CJO) and, combined with the ship's lateral attitude angle (θ), constructs a comprehensive disturbance yaw index (CRP) for ship disturbance deviation analysis. The system can issue intervention commands to the control system in real time when the ship's instability or yaw risk exceeds a threshold, improving the safety level and intelligent management capabilities of the lock passage.

The present application relates to the technical field of wave compensation, and particularly relates to a marine wave compensation method and system for ship stability, which comprises the following steps: collecting all-around marine wave monitoring parameters, and performing multi-time window period division processing and wave energy density quantification analysis to generate wave energy density of each time window; performing nonlinear dynamics behavior mining and dynamic sea wave digital perception modeling according to the wave energy density of each time window to construct a sea wave field dynamics model; performing multi-scale wave feature analysis based on the sea wave field dynamics model, and performing wave trend evolution prediction to construct a wave trend prediction map; and identifying current ship state parameters. The present application realizes automatic adjustment of the center of gravity position according to real-time monitoring data, and realizes adaptive stability optimization of the ship attitude under different wave conditions.

The invention provides a ship oil tank oil mass dynamic measurement method based on optical fiber compass attitude compensation, which comprises the following steps of: installing an optical fiber compass on a ship for acquiring acceleration, angular velocity and inclination angle data of the ship in real time; meanwhile, a temperature sensor and a pressure sensor are installed in the oil tank and used for collecting temperature and pressure data of fuel oil in the oil tank; obtaining an oil mass-stability parameter relation model: in a ship design stage, establishing a relation model between the oil mass of the ship oil tank and the ship stability parameter in a mode of combining theoretical calculation and experimental test; when the real-time oil mass of the oil tank is obtained, the ship stability parameters obtained in real time are substituted into the obtained oil mass-stability parameter relation model, and the real-time oil mass of the ship oil tank is obtained through calculation; according to the collected real-time temperature and pressure data of the fuel oil in the oil tank, temperature and pressure compensation correction is conducted on the real-time oil mass obtained through calculation; the system can accurately measure the oil quantity of the oil tank of the ship in real time.

The invention discloses a ship ballast water pumping link flow optimization control system based on data analysis, and particularly relates to the technical field of ship automation and intelligent control. Comprising a multi-source data acquisition module, a data preprocessing and fusion analysis module, a working condition intelligent identification and flow demand prediction module, a multi-target flow optimization decision module, a collaborative execution and closed loop feedback correction module and an abnormal working condition early warning and emergency regulation module. According to the method, multi-dimensional real-time data are fused, a machine learning algorithm is utilized to intelligently identify working conditions and predict flow demands, a multi-objective optimization model taking ship stability as a core is constructed for decision making, and execution accuracy and safety are ensured through closed-loop feedback and an emergency mechanism. According to the invention, the problems of one-sided regulation and control basis, response lag, single target and poor adaptive ability are solved, high-precision, high-safety and multi-target collaborative optimization under complex sea conditions is realized, and the intelligent level and comprehensive benefits of ships are improved.

The invention relates to the technical field of ship control, in particular to a ship stability control system and a ship stability control method. The invention particularly discloses a ship stability control system. The ship stability control system comprises a detection device and an adjustment device. The adjusting device comprises a transmission assembly and a mass part, the transmission assembly comprises a first guide rail part and a driving mechanism, the first guide rail part comprises at least one first rail arranged in the length direction of the ship, and the mass part is connected to the driving mechanism. The driving mechanism drives the mass part to move along the first track; the mass part is a battery box. The battery box serves as a weight part to adjust the gravity center position of the whole boat, energy consumption can be reduced, and the cruising ability of the boat is improved; and the position of the battery box is adjusted in all directions along the heading direction of the boat, so that the driving and riding comfort of the boat is greatly improved, and the sailing safety of the boat is improved.

The utility model discloses a ship stability measuring device, and relates to the technical field of ship stability measurement. A lifting rope is fixedly connected to the bottom surface of the water absorption sponge; a plumb bob is fixedly connected to the bottom of the lifting rope; a fixed plate is fixedly connected to the mounting table; a spring is fixedly connected to the side surface of the fixed plate; during use, after a ship body is inclined by placing a counter weight, the rack is driven to move by rotating the missing gear and moving the missing gear, when teeth on the missing gear are separated from the rack, the missing gear is driven to move, and the missing gear is driven to move by rotating the missing gear. And the spring pushes the display plate to be in contact with the ink on the lifting rope, so that measurement data can be recorded more intuitively, and a user can conveniently calculate a stability result subsequently.