476 results about "Marine propulsion" patented technology

The invention discloses a ship propulsion control system and method, and relates to the technical field of ship engineering.The ship propulsion control system comprises an acquisition module used for acquiring analog quantity signals during ship propulsion, and a main controller module used for receiving the analog quantity signals and generating a propulsion control instruction; according to the ship propulsion control system, two acquisition channels are arranged for analog quantity signals, a fault channel is rapidly detected and switched in combination with a self-checking mechanism, the fault channel can be rapidly detected, the fault channel can be rapidly switched, the fault channel can be rapidly detected, the fault channel can be rapidly switched, and the reliability of the ship propulsion control system can be improved. A digital quantity output channel fault is found in time and switched to a standby channel, a power supply and communication interface backup strategy is perfected, fault priorities are accurately divided, corresponding measures are taken, the strict requirements of modern ships for high reliability and high safety of propulsion control are met, and powerful technical support is provided for stable navigation of the ships.

The invention relates to the technical field of ship propulsion power generation system control, in particular to a constant-power rotating speed control method and system for a ship shaft generator, and the method comprises the following steps: obtaining operation state parameters and ship environment parameters of a ship propulsion power generation system; based on the operation state parameters and the ship environment parameters, the influence of the adjusting action of the shaft generator on the rotating speed of a main propulsion diesel engine and the influence of the adjusting action of a main propulsion diesel engine speed adjusting device on the output power of the shaft generator are pre-judged, and an interactive pre-judgment result is obtained; according to the interactive pre-judgment result, jointly deciding and generating a first adjusting instruction for adjusting an axle generator and a second adjusting instruction for adjusting a main propulsion diesel engine speed adjusting device; by introducing an interactive pre-judgment and joint decision-making mechanism, the negative interaction between the shaft generator and the main propulsion diesel engine speed regulation device can be effectively identified and eliminated, and the operation stability and safety of the ship under the severe sea condition are improved.

The invention discloses a ship shafting reliability evaluation method and system based on multiple working conditions, and the method comprises the steps: collecting multi-source data of a ship propulsion system through integrating multiple sensors; constructing a dynamic load spectrum based on a time-varying Copula function in combination with parameters such as a stress distribution function and a degradation amount distribution function; a reduced basis finite element method is adopted, experimental strain data are collected, and a reduced-order basis matrix is constructed; based on a three-stage Wiener degradation model, in combination with parameters such as a material degradation rate, activation energy and a temperature average value, the residual life of the ship propulsion system is predicted, and model parameters are adjusted in real time through a Bayesian dynamic updating mechanism; building Hamiltonian through physical constraint reinforcement learning, and optimizing operation parameters of the ship propulsion system in combination with a fault probability threshold value and an energy change rate threshold value; a digital twin engine is utilized to provide real-time visual output. According to the invention, the service life is prolonged to the greatest extent while the system meets the performance requirements; and monitoring and decision making by operators are facilitated.

The invention provides a ship propulsion shafting and a design method thereof, and the design method comprises the steps: determining positioning points at two ends of a shafting bow and a shafting stern according to the overall arrangement of a ship; determining the shaft diameter and length of each shaft section of the shafting according to the propulsive power requirement and the positioning points at the bow and stern ends of the shafting; determining the positions and the number of the bearings; when all shafts are calculated to be metal shafts, shafting strength and shafting pilot test calculation are carried out, and when the intermediate shaft is replaced by a carbon fiber shaft from a metal shaft and other shaft sections are not changed, shafting strength and shafting pilot test calculation is carried out; and when the strength and the shafting alignment of the shafting after the carbon fiber shaft is replaced meet the set requirements, the current shafting design scheme is reasonable. According to the design method, a replaceable intermediate shaft can be arranged on the propulsion shafting, and specific parameters of each shafting are reasonably determined, so that the design requirements of ships under certain special conditions are met, and the design method is suitable for shafting design of kiloton-level surface ships propelled by adopting conventional power shafting belt propellers.

The invention relates to the technical field of ship power system control, in particular to a ship shaft power generation energy management and efficiency optimization method based on multi-working-condition adaptation, and the method comprises the steps: a data collection and processing step: collecting and preprocessing multi-source heterogeneous operation parameters capable of comprehensively representing a ship propulsion system, a power system, a motion state and an external environment in real time; a working condition dynamic identification step; an optimization model dynamic construction step; an online optimization and control step; and an adaptive learning step: based on new data generated in a system operation process, performing periodic incremental training on the time sequence deep learning model to update network parameters of the time sequence deep learning model. The self-adaptive learning enables the system to continuously optimize the working condition identification precision along with the time lapse of ship operation and the change of the external environment, and improves the long-term stability and adaptability of the system.

The invention discloses a ship propulsion shafting fault diagnosis method based on multi-modal attention fusion, and relates to the technical field of ship fault diagnosis. According to the method, multi-modal data such as vibration parameters, lubricating oil parameters and cooling water parameters of key parts of a ship propulsion shafting are synchronously collected and preprocessed; a modal specific feature extraction strategy is adopted, a multi-modal attention fusion mechanism including intra-modal self-attention, inter-modal cross attention and adaptive dynamic weight distribution is designed, and heterogeneous modal features are effectively integrated. Compared with a single-mode method and a traditional feature splicing method, the method has the advantage that the diagnosis accuracy is remarkably improved. The method has high robustness, and can still maintain high diagnosis accuracy even under the condition that part of sensors fail.

The invention provides an energy management strategy verification platform for a plug-in series hybrid power ship propulsion system. The energy management strategy verification platform comprises a power source module, a power output module, a load simulation module, a transmission module, a sensor measurement module and a control system module, the power source module outputs electric energy through multi-energy cooperation; the power output module generates propelling power according to the electric energy; the load simulation module simulates load characteristics according to the propulsion power; the transmission module is connected with the power source module and the power output module as well as the power output module and the load simulation module; the sensor measurement module collects operation parameters of the verification platform; and the control system module executes an energy management strategy according to the operation parameters and outputs a control instruction. A graphical programming environment is constructed by adopting a modeling code automatic generation system, and a strategy rapid prototype development verification closed loop is formed in combination with a range extender intelligent start-stop control strategy and a multi-mode power generation control strategy.

The invention provides a time domain and frequency domain combined impact resistance analysis method and device for a ship stern tube, and the method comprises the steps: building geometric models of all parts in the stern tube through three-dimensional modeling software according to an actual engineering drawing of the stern tube, carrying out virtual assembly on the geometric model of each component according to the actual assembly relation of each component to obtain a geometric model of the tail shaft tube; importing the geometric model of the tail shaft tube into finite element software, endowing each component with material attributes, and carrying out grid division on the geometric model by adopting an overall network size control method; and performing static analysis on the geometric model after grid division to obtain static working stress, performing dynamic analysis on the geometric model after grid division to obtain dynamic impact stress, and synthesizing the static working stress and the dynamic impact stress into total stress. According to the method, time domain and frequency domain combined shock resistance response calculation is carried out for the tail shaft tube as a core component of the ship propulsion system, and the accuracy of shock resistance response calculation is improved.

A method for controlling a marine drive configured to propel a marine vessel. The method includes receiving a destination for the marine vessel, receiving a demand request for operating the marine drive, and operating the marine drive at an actual demand corresponding to the demand request. The method further includes determining a required energy for the marine drive to propel the marine vessel to the destination at the actual demand and determining a remaining energy of an energy source available for operating the marine drive. The method further includes comparing the required energy to the remaining energy and, when the remaining energy is less than the required energy, automatically iteratively reducing the actual demand for operating the marine drive until the remaining energy equals or exceeds the required energy determined for the marine vessel to reach the destination.

The invention discloses a six-phase motor driver harmonic current suppression method based on multi-subspace control, and belongs to the technical field of motor control. In order to solve the problem that low-order harmonic current of a six-phase motor in a z1-z2 subspace is difficult to effectively suppress, the invention provides a scheme that a mathematical model of the six-phase permanent magnet synchronous motor is established, multi-subspace decomposition is carried out, and stator current is divided into a d-q subspace and the z1-z2 subspace; a double-closed-loop control architecture with a speed loop as an outer loop and a current loop as an inner loop is constructed, a d-q subspace adopts a PID regulator to realize fundamental current control, and z1-z2 subspaces realize suppression of fifth and seventh harmonic currents through a parallel structure of PI and a quasi-proportional resonance controller; and a PWM signal is synthesized through inverse transformation and dual three-phase space vector pulse width modulation, and an inverter is driven to realize stable output of fundamental wave energy and harmonic suppression. The method effectively reduces the harmonic distortion rate, improves the operation efficiency and stability, and is suitable for occasions of new energy vehicles, ship propulsion, rail transit and the like.

The invention provides a self-cooling electromagnetic direct-driven straight wing propeller, and relates to the technical field of ship propellers, the propeller comprises a shell, and an outer disc type motor, an inner disc type motor and a propelling mechanism which are arranged in the shell; the outer disc type motor comprises an outer rotor and an outer stator, the outer rotor is rotatably connected with the shell, and the outer stator is fixed to the shell. The inner disc type motor is coaxially arranged on the inner side of the outer disc type motor and comprises an inner rotor and an inner stator, the inner stator is fixed to the shell, and the inner rotor is rotatably connected with the outer rotor. The propelling mechanism comprises a disc, straight wing blades, a sun gear and a planetary gear, the disc is fixed to the outer rotor, the blades are evenly distributed in the circumferential direction, and a rotating shaft is rotatably installed on the disc. The sun gear is coaxially fixed with the inner rotor, the planetary gears are uniformly distributed, meshed with the sun gear and rotatably connected with the outer rotor, and each planetary gear is fixed with the corresponding blade rotating shaft. According to the propeller, the blades are driven to revolve and swing through the two motors respectively, a traditional complex structure is simplified, the size and weight are reduced, and the energy conversion efficiency is improved.

A method of controlling propulsion of a marine vessel includes receiving an instruction to engage a wake control mode and then automatically effectuating a steering change and / or a propulsion output change. A vessel orientation response to the steering change and / or the propulsion output change is measured and a determination of whether a wake zone requirement is met is made based on the orientation response. If the orientation requirement is met, a current propulsion output that meets the wake zone requirement is maintained. If the orientation requirement is not met, a further steering change and / or further propulsion output change is automatically effectuated until the wake zone requirement is met.

A cooling device for a ship propulsion machine includes a drain passage and a collector. The collector includes a collector main body, a case, an upper connection pipe, and a lower connection pipe having flexibility. A first bent portion is provided between an upper end portion and a lower end portion of the lower connection pipe. A second bent portion is provided between the first bent portion and the lower end portion of the lower connection pipe. The lower connection pipe extends downward from the upper end portion thereof along an axis of the case, bends at the first bent portion, extends downward while being inclined with respect to the axis so as to be separated from the axis, bends at the second bent portion, and extends downward while being inclined with respect to the axis so as to be close to the axis.

To improve space efficiency.SOLUTION: A marine propulsion device includes: a first drive shaft 7; a drive gear 4 which rotates integrally with the first drive shaft 7; a second drive shaft 14 which is parallel to the first drive shaft 7; a driven gear 13 which rotates around a center axis of the second drive shaft 14; and a water pump assembly 10 for supplying a coolant to an engine 131. The driven gear 13 is driven by the drive gear 4 to drive the second drive shaft 14 rotationally. The water pump assembly 10 is disposed in the first drive shaft 7 and driven by the first drive shaft 7.SELECTED DRAWING: Figure 3

The invention relates to the field of ship energy efficiency control, and provides a method for quickly optimizing parameters of an energy-saving device in front of a propeller. Based on an orthogonal test design method, a PCA correlation analysis algorithm and computational fluid mechanics numerical simulation, through reasonable analysis, screening and optimization combination of numerous structure parameters, on the premise that the number of tests is reduced as much as possible, a parameter combination enabling the performance of the paddle-front energy-saving device to be optimal can be accurately found, and the performance of the paddle-front energy-saving device is optimized. Therefore, the purpose of optimizing the energy-saving device in front of the propeller is smoothly achieved, and an efficient, economical and scientific solution is provided for energy-saving work of a ship propulsion system.

The invention discloses a propulsion device for a ship, and belongs to the field of ship propulsion. Comprising a shell, and a driving mechanism is arranged in the shell; a water cooling mechanism is embedded in the lower surface of the shell; a propelling mechanism is arranged on the right side of the shell; a guide mechanism is arranged at the position, located above the driving mechanism, in the shell; the driving mechanism comprises a shaft rod, the upper surface of the shaft rod is fixedly connected with a connecting rod, and two movable grooves are formed in the upper surface of the connecting rod; in the extending or shortening process of the electric push rod, one of the two motors is located on the left and the other is located on the right, and the propelling mechanism is controlled to be started and the ship is controlled to be propelled by controlling the motor on the right to be started; by means of the mode, the electric push rod only needs to contract and is matched with two motors for alternate use, and the problem that in the prior art, the motors are prone to being damaged in the long-term operation state due to single-motor driving propelling can be solved.

To provide a propulsion system, a control program, and a control method for a vessel capable of suppressing deterioration in fuel consumption along with load variation in a propulsion propeller in a vessel including an engine and a rotary machine.SOLUTION: A propulsion system for a vessel includes an engine, a rotary machine, a power converter, and a controller, the controller acquires torque of the engine, torque of the rotary machine, angular speed of the rotary machine, and prefixed moment of inertia for rotational axis conversion of the rotary machine, calculates an estimation value for load torque of the propulsion propeller by using equation of motion for the rotary axis system of the rotary machine, generates a torque command value regarding the torque to be generated by the rotary machine from the propulsion force command value, and compensates the torque command value to cancel fluctuation component of the estimation value of the load torque.SELECTED DRAWING: Figure 2

The application discloses a kind of ship's multiple propeller collaborative propulsion control method and system, it is related to ship automation control technical field.For by the control system of ship collaborative control multiple propeller to carry out ship propulsion, collaborative propulsion control method includes: obtaining the speed of ship, main station handle position and power station available power;Based on speed and main station handle position, identify the current navigation condition of ship;Based on the matching relationship of pre-set, obtain the operation mode matched with navigation condition;Based on navigation condition, operation mode and the switching control strategy between different navigation conditions of pre-set, available power of power station is distributed to multiple propeller, and the collaborative propulsion of ship is carried out.Such, by based on speed and main station handle position, identify navigation condition, and match operation mode, to distribute available power of power station to multiple propeller, improve the response speed of ship propulsion control, improve the adaptability to complex navigation environment, improve ship safety.

The invention discloses a liquid hydrogen high-temperature superconducting motor and magnetofluid dual-power propulsion system, and aims to solve the problems that an existing ship propulsion system is single in power mode and insufficient in power density. The system comprises a liquid hydrogen storage and supply unit, a cooling unit, an energy conversion unit, a superconducting motor propulsion unit and a magnetofluid propulsion unit, the liquid hydrogen storage and supply unit conveys liquid hydrogen to the superconducting part through the cooling loop, the liquid hydrogen is converted into hydrogen through the heat exchanger after being cooled, the energy conversion unit converts the hydrogen into electric energy and outputs the electric energy in a matched mode, and the superconducting motor propulsion unit and the magnetic fluid propulsion unit generate mechanical energy or electromagnetic force through the electric energy to drive a ship. And the superconducting component is cooled by the cooling loop. The liquid hydrogen in the system has the dual functions of a cooling medium and fuel, a coolant and fuel do not need to be additionally configured, the requirements for silence, high thrust and rapid maneuvering are met, the power density is high, the environmental protection property is good, and the system is suitable for high-performance propelling scenes such as ships, especially submarines.

The invention discloses a Z-shaped propeller underwater turnover installation method based on dynamic mechanical analysis, and relates to the technical field of ship propulsion system installation. Comprising the steps that S1, a comprehensive stress safety coefficient is obtained through sensor data and a mechanical model, and the water flow resultant force is corrected; s2, a hoisting mode is determined according to the allowable turning-over angle of the propeller, and meanwhile real-time hoisting is conducted according to the actual turning-over angle of the propeller; and S3, the propeller and the propeller base are attached through the guide rail and the hydraulic buffer system. According to the invention, the tension of the sling is automatically adjusted through the preset threshold value and the comprehensive stress safety coefficient, so that the stress of the sling in the hoisting process can be ensured to be always within a safety range, and the risk of sling breakage or propeller overturning is avoided; and the influence of water flow change on the propeller is dynamically corrected, so that the hoisting stability under complex sea conditions is improved.

A watercraft operating system includes a plurality of marine propulsion devices, a joystick, a thrust selector, and a controller. The thrust selector is operable to select one of a plurality of thrust modes including a limiting mode, which limits a forward thrust and a rearward thrust, and a non-limiting mode which does not limit at least one of the forward thrust and the rearward thrust. The forward thrust is generated by each of the plurality of marine propulsion devices when the joystick is tilted forward, whereas the rearward thrust is generated when the joystick is tilted rearward. The controller is configured or programmed to control a rudder angle and an output of each of the plurality of marine propulsion devices in accordance with the selected thrust mode, a tilt direction of the joystick, and a tilt amount of the joystick.

The present invention relates to a ship propulsion system wherein, when a change in the output of a main engine occurs or is expected, a controller variably controls the power withdrawal force of a shaft generator in a direction in which the change in the output of the main engine is counterbalanced, thereby maintaining the output of the main engine to be smooth, and the main engine's fuel efficiency and power supply stability engine can thus be improved.

The invention discloses an intelligent energy-saving control method and system for a ship propulsion system. The method comprises the steps that S1, operation parameters of the ship propulsion system, ship navigation state parameters and marine environment parameters are collected; s2, preprocessing each parameter, and constructing a multi-dimensional state feature set; s3, evaluating the operation efficiency of the propulsion system based on the gradient lifting-neural network composite model, and determining an energy-saving optimization space; s4, generating an optimization instruction of the key control parameters of the propulsion system through a self-adaptive fuzzy PID algorithm in combination with the dynamic change of the sea condition and the load; s5, executing the optimization instruction, collecting response parameters of the propulsion system in real time, and dynamically correcting control parameters according to deviation to form a closed-loop control cycle; and S6, periodically updating adjustable parameters of the evaluation model and the adaptive fuzzy PID algorithm. According to the invention, through multi-parameter fusion perception and dynamic optimization control, accurate matching of the propulsion system, the navigation environment and the load demand is realized, and the economical efficiency and the environmental protection property of ship navigation are improved.

The utility model relates to the technical field of ship power, in particular to a high-speed boat driving device based on a multi-section shaftless pump spraying structure. The utility model provides a high-speed boat driving device based on a multi-section shaftless pump spraying structure. The high-speed boat driving device comprises a boat and a power system. The boat comprises a channel which is arranged along the length direction of the boat and penetrates through the bottom of the boat, the power system comprises at least three shaftless power propellers, and the at least three shaftless power propellers are arranged in the channel at intervals. The high-speed boat driving device has the advantages of being high in power density, simple in structure, light in weight, low in cost, good in performance and stability and the like, and the requirement of a ship propulsion system with the high power requirement can be met.

The application discloses an adjustable ship propeller rotation sealing oil pressure compensation device, which comprises a shell, a plug, a screw rod, a screw rod support, a sleeve, a spring and a spring support, the screw rod support is fixed on the upper part of the shell, the plug, the sleeve and a sealing ring are arranged in the shell, the screw rod is connected with the spring support through the sleeve, the upper part of the plug is connected with the sleeve, and the lower part of the plug is provided with the sealing ring; when in use, the shell is installed on an oil delivery pipeline of a sealing oil tank, when oil is supplied, sealing oil enters from one end of the device and flows out from the other end, the required acceleration of the up-down movement of the sleeve in the shell can be changed by adjusting the compression amount of the spring through the screw rod, when the propeller is subjected to a larger acceleration, the sleeve and the plug move to the sealing position of the oil outlet of the shell, the pipeline is closed, and sealing oil leakage is reduced.

The invention discloses a ship propulsion six-phase permanent magnet motor model prediction control method, which comprises the steps of S1, establishing a ship propulsion six-phase permanent magnet synchronous motor mathematical model based on a vector space decoupling technology, S2, carrying out vector space decoupling analysis on the ship propulsion six-phase permanent magnet synchronous motor mathematical model, acquiring voltage vector distribution characteristics of two effective control subspaces, namely alpha-beta and x-y; s3, compensating a prediction error caused in a current prediction control process by adopting a delay compensation technology; and S4, optimizing the current prediction value, obtaining an optimal six-way switching signal matched with the target current, inputting the optimal six-way switching signal into a six-phase two-level inverter, and performing a ship propulsion six-phase permanent magnet motor model prediction control process based on virtual voltage vector space modulation. According to the method, the virtual voltage vector control set is pre-synthesized, so that the harmonic current in the x-y plane is effectively suppressed, and the harmonic wave caused by over-excitation current response is suppressed.

The invention relates to the technical field of propulsion motor noise control, in particular to a propulsion motor noise control method based on short-time Fourier transform, and the method comprises the following steps: S1, collecting a vibration signal during the operation of a ship propulsion motor through a sensor, and obtaining a signal sequence; s2, converting the signal sequence into a time-frequency two-dimensional signal sequence by adopting short-time Fourier transform; and S3, obtaining an output signal by processing the time-frequency two-dimensional signal sequence. The propulsion motor noise control method based on short-time Fourier transform can continuously monitor the noise level of the motor during the operation period through combining the advantages of the sum, and quickly adjust the control strategy according to real-time feedback, thereby achieving the purpose of automatically regulating and controlling the noise, effectively reducing the operation noise of the motor, facilitating the reduction of the structural fatigue, and improving the reliability of the propulsion motor. The service life of equipment is prolonged, so that the long-term maintenance cost is reduced.

A system for a watercraft includes an engine sensor, a status sensor, and a watercraft operating controller. The engine sensor is operable to detect a rotational speed of the engine. The status sensor is operable to detect status data indicating a status of the watercraft. The watercraft operating controller is configured or programmed to determine that an actual operation of the marine propulsion device has been started after shipment of the marine propulsion device, obtain the status data when the rotational speed of the engine reaches a first rotational speed range for the first time after a start of the actual operation of the marine propulsion device, and record the status data when the rotational speed of the engine reaches the first rotational speed range for the first time after the start of the actual operation of the marine propulsion device as initial status data.

The application relates to the technical field of cabin sealing of a ship propulsion system, and provides a ship cabin sealing device and a ship, which comprises a sealing flange, a linear driving mechanism and a flange seat; the sealing flange is movably sleeved on a transmission main shaft of the ship, and the axis of the sealing flange is coincident with the axis of the transmission main shaft; one side of a sealing boss of the sealing flange facing the transmission main shaft is provided with a sealing surface, the sealing surface is used for being detachably connected with the end surface of the sealing boss; the sealing flange is connected with the moving end of the linear driving mechanism, the fixed end of the linear driving mechanism is connected with the flange seat, and the flange seat is used for being connected with the cabin wall fence of the ship; wherein the sealing flange has a first position and a second position; when the sealing surface is separated from the end surface of the sealing boss at the first position; and when the sealing surface is attached to the end surface of the sealing boss at the second position; the application conveniently realizes the sealing of the cabin, and improves the safety of the ship.