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827results about "Vessel designing" patented technology

Method and system for testing a control system of a marine vessel

A method for verifying a control system (2) of a vessel (4), in which said control system (2) in its operative state receives sensor signals (7) from sensors (8) and command signals (9) from command input devices (10), and as a response provides control signals (13) to actuators (3) in order to maintain a desired position, velocity, course or other state of said vessel (4), characterized by the following steps:
    • during a time (t0), disconnecting the reception of real sensor signals (7a, 7b, 7c, . . . ) and replacing said real sensor signals by a test sequence (T0) of artificial measurements (7a′, 7b′, 7c′, . . . ) from a test signal source (41);
    • letting said control system (2) work based on the artificial sensor signals (7, 7′) to generate control signals (13′) to be recorded as a response (S0) to said first test sequence (T0) for said first time (t0) on a control signal logger (42) and storing response (S0) to the test sequence (T0) as the control system's (2) “signature” response (S0);
said method having the purpose of, at a later time (t1, t2, t3, . . . ), to use the test sequence (T0) input to the control system (2), and record a later response (S1, S2, S3, . . . ) and determining whether said later response similar to the signature response (S0) to verify that said control system (2) is unchanged, or not.
Owner:MARINE CYBERNETICS

Horizontal plane motion mechanism for towing tank test

The invention discloses a horizontal plane motion mechanism for a towing tank test, which comprises a plane motion mechanism comprising a transverse oscillation frame 8, a transverse oscillation motion component 9, a yawing oscillation motion component 10, a transverse beam 6, a front connecting rod 5, a front connecting rod 11, adjusting rods 4 and 12, joints 3 and 13, force balances 2 and 14, and the like. The upper part of the horizontal plane motion mechanism is connected with a tank trailer 7 through the transverse oscillation frame 8, while the lower part is connected with a ship model 1 through the connecting rods 5 and 11 and force balances 2 and 14. By adopting a rolling guide rail, the transverse oscillation motion component has the characteristics of long service life, free maintenance for long-term work, high speed, low noise, high capacity of absorbing a mounting dimension error, and the like; and the transverse oscillation amplitude is over +/-1m, the ball screw precision is high and a transverse oscillation amplitude error is less than 0.2mm. Due to the adoption of a self-lubricating bearing and worm gear transmission, the yawing oscillation motion component has the advantages of wide rotation angle range, high torque, high self-locking property and high precision. A plurality of groups of connecting rod mounting holes are formed on the transverse beam and are suitable for different ship models. The connecting rod is provided with a linear bearing, and when the ship model is influenced by an external force to oscillate up and down, the connecting rod automatically adjusts the length, can remove a force in the vertical direction, and improves the accuracy of the maneuvering performance test. The control system is driven by a servo motor, a photoelectric encoder is used for sampling and feeding back, and a PLC programmable logic controller is used for controlling. The horizontal plane motion mechanism has the advantages of convenient control.
Owner:SHANGHAI ZHUGUANG MACHINERY +1

Ship model four-freedom-degree rotating arm test device and method

A ship model four-freedom-degree rotating arm test device comprises a rotatable rotating arm and a measuring mechanism between the rotating arm and a ship model. The measuring mechanism comprises a middle base fixedly connected with a rotating arm trailer, heaving rods penetrate through the middle base and can vertically slide, a linear displacement sensor is installed on a base plate at the lower ends of the heaving rods, a counterweight is connected to the upper end of the base plate through a steel wire rope, a four-component force measuring sensor is connected to the lower end of the base plate and fixedly connected with a longitudinal swing base, the longitudinal swing base is rotationally provided with a longitudinal swing shaft connected with a rotational potentiometer, the longitudinal swing shaft is fixedly connected with a middle frame, and the middle frame is connected with a heeling angle adjusting mechanism. The invention further provides a test method, wherein according to the method, water power in the longitudinal direction, water power in the transverse direction, water power during rolling and water power during yawing are measured through rotating arm tests under five test working conditions, and then the water power derivative is worked out through corresponding maneuvering motion equations. According to the ship model four-freedom-degree rotating arm test device and the test method, trim angle measurement and heaving displacement measurement of the ship model and water power measurement of the ship model in four motion directions can be achieved, and the handling quality of a ship in the four motion directions can be forecasted.
Owner:中国船舶重工集团公司第七〇二研究所

Device and method for measuring resistance and postures of ship module

ActiveCN106184614ALongitudinal freedom of movementLongitudinal sliding friction is smallVessel designingMeasurement deviceRolling-element bearing
The invention relates to a device and method for measuring resistance and postures of a ship module. The device consists of an S-shaped resistance dynamometer, a trolling supporting rod, a guyed displacement measuring mechanism, a guide frame assembly and a band brake mechanism. When the device trolls a pool for measuring the resistance of the ship module, the device can also obtain a trim angle and the heaving postures of the head and the tail of the ship module, and resistance measuring under a stable speed condition of the ship module is realized by the interworking of the resistance dynamometer and the band brake mechanism; a wire is driven by the head and the tail of the ship module through utilizing the guyed displacement measuring mechanism, so that a corresponding voltage is outputted by a potentiometer, and a vertical displacement variation value of a bow and a vertical displacement variation value of a stern of the ship module are obtained through a straight-line relation; and a trim angle of the ship module, a heaving value of the ship module, the vertical displacement variation value of the bow and the vertical displacement variation value of the stern of the ship module are calculated; during trolling, the situation that the ship module moves freely in a vertical direction can be guaranteed by the guide frame mechanism, and the situations that a rolling cylinder is low in vertical sliding friction and free in vertical movement are guaranteed by utilizing a rolling shaft.
Owner:中国船舶重工集团公司第七〇二研究所

Flexible six-dof rope traction ship model pool test control method and system

The invention discloses a flexible six-dof (degree-of-freedom) rope traction ship model pool test control method and system. Rope length control and ship model attitude control can be accurately realized through a ship model rope traction supporting mechanism. According to the method, rope length adjustment amount of each traction rope connected with a ship model is calculated by a main loop controller according to a preset target attitude angle and an attitude feedback signal, the calculated rope length adjustment amount of each traction rope is sent to a secondary loop controller, pulse adjustment amount of each traction rope connected with the ship model is calculated by the secondary loop controller according to the rope length adjustment amount of each traction rope and a pulse feedback signal of each servo motor, the calculated pulse adjustment amount of each traction rope is sent to a driver corresponding to each traction rope, the corresponding servo motors are driven by the drivers to rotate according to the pulse adjustment amount, a motion distance of a transmission mechanism is controlled through rotation of the servo motors, change of rope length of the traction ropes is controlled, and a present attitude of the ship model is adjusted through change of rope length of the traction ropes.
Owner:JIMEI UNIV

Experimental platform used for simulation and diagnosis of working conditions of shipping power system and based on intelligent engine room

ActiveCN106697187AMeet the requirements of simulating the working conditions of the real ship power systemMeet the function of practical exercisesWatercraft hull designVessel designingEngineeringStudy methods
The invention discloses an experimental platform used for simulation and diagnosis of working conditions of a shipping power system and based on an intelligent engine room. The experimental platform is mainly composed of a shipping power system simulation experiment platform frame, a datum monitoring and failure diagnosis platform body (5) installed on the experiment platform frame and an oil liquid on-line monitoring module (6) connected with the datum monitoring and failure diagnosis platform body (5) through signal lines. The oil liquid on-line monitoring module (6) is connected into a pipeline lubrication system of the experimental platform in parallel. According to the experimental platform used for simulation and diagnosis of the working conditions of the shipping power system and based on the intelligent engine room, simulation of different working conditions of the shipping power system can be achieved, and torque monitoring, vibration monitoring and shaft power monitoring of the shipping power system and a shaft system as well as on-line monitoring of states of lubricating oil and hydraulic oil under different working conditions can be achieved; by combining an intelligent machine learning method, under supporting of a great number of monitoring data, failure diagnosis and state evaluation of the shipping power system under an intelligent engine room framework are achieved; and the experimental platform can be used as a target platform of an intelligent on-line monitoring and diagnosis system.
Owner:WUHAN UNIV OF TECH

Process for hoisting whole assembly section of upper-layer building living zone of ship

The invention relates to a process for hoisting a whole assembly section of an upper-layer building living zone of a ship. The hoisting process comprises the steps that the living assembly section is hoisted and assembled into a whole in a segmented mode, the whole assembly section of the living zone is then hoisted through a hoisting tool, and the peripheral wall of the whole assembly section of the living zone coincide with deck positioning piles when the whole assembly section of the living zone is 0.8-1.2 m away from the surface of a deck, the whole assembly section of the living zone is slowly put down, and finally tiny adjustment is performed through pull members on the periphery of the whole assembly section of the living zone for alignment and positioning. The process for hoisting the whole assembly section of the upper-layer construction living zone of the ship has the advantages that the whole assembly section of the living zone is firstly assembled in the segmented mode and then is wholly hoisted to the deck, accordingly the working efficiency of hoisting can be improved, a ship construction period can be shortened, the deformation of an upper-layer building in the hoisting process is prevented by adopting various structural strengthening measures, and the actual deformation amount of the upper-layer building of the ship can be minimum.
Owner:JIANGSU HAITONG OFFSHORE ENG EQUIP

Multifunctional ship model experimental measurement device

The invention belongs to the technical field of ship model experimental equipment, and relates to a multifunctional ship model experimental measurement device. A bow and a midship of a ship model are respectively provided with a cabin. A frame is installed in the cabin of the bow of the ship model. A liquid tank is installed in the cabin of the midship of the ship model, and a deck is placed on the upper portion of the liquid tank. A standard block for an experiment is placed on the frame or the deck, resistance towing brackets are symmetrically arranged on the two sides of the midship of the ship model, a power supply and a tilt angle sensor are sequentially installed on the deck of the bow of the ship model, the tilt angle sensor is in electrical information communication with the power supply and a signal emitter, the signal emitter is installed on the deck of a stem of the ship model, a signal receiver is in electrical information connection with a handheld displayer and a computer, and the signal receiver, the handheld displayer and the computer jointly form a signal receiving device. The multifunctional ship model experimental measurement device is simple in structure and convenient to operate, measured data are accurate, various ship model experiments can be conducted, wireless measurement is combined with wired measurement, and the requirement for measuring different environments can be met.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Mounting method for energy-saving conduit of ultra large crude carrier in block stage

ActiveCN108928432AGuaranteed one-time installation successShorten the construction periodVessel designingLeft halfButt joint
The invention discloses a mounting method for an energy-saving conduit of an ultra large crude carrier in a block stage. The mounting method for the energy-saving conduit of the ultra large crude carrier in the block stage comprises a conduit advanced total assembly stage, a shafting pre-aligning stage, an energy-saving conduit locating and mounting stage and an energy-saving conduit and propellershaft welding stage; the conduit advanced total assembly stage comprises the following steps of making a special jig frame, scribing a line on the jig frame, mounting a right half side conduit, mounting a central longitudinal bracket, mounting a left half side conduit, arranging temporary reinforcements at the front end and an opening of the energy-saving conduit; carrying out positioned weldingto weld butt joints of inner shell plates, the central longitudinal bracket and a cover plate, arranging a temporary reinforcement at the rear end of the energy-saving conduit, and cutting off allowance of a fin; and in the shafting pre-aligning stage, a center line of shafting is transferred to a propeller shaft external plate. According to the mounting method for the energy-saving conduit of theultra large crude carrier in the block stage, the energy-saving conduit mounting step is advanced to create a condition for staged boring of a propeller shaft hole; and therefore, the shipbuilding efficiency is effectively enhanced, and the shipbuilding cost is saved.
Owner:SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD +1

Large-scale anchor chock and anchor mouth lofting design method

The invention provides a large-scale anchor chock and anchor mouth lofting design method. According to the lofting design method, a three-dimensional space lofting principle is used for completing theoretical model construction, and a specific three-dimensional projection lofting method is adopted to complete the lofting of an intersecting line of the anchor chock and a ship hull plate and a contour line of an anchor chock upper basal plane; and at the same time, a tangency included angle of the anchor mouth and the anchor chock and a hawse pipe is obtained, a contour line of the anchor mouthis drawn, a three-dimensional shaded surface of the anchor chock and anchor mouth is constructed, and three-dimensional modeling work of the hawse pipe, the anchor chock and the anchor mouth is finished. The large-scale anchor chock and the anchor mouth lofting design method solves the problem that the lofting of anchor chocks and anchor mouths of various types of ships is low in efficiency and poor in precision, precision data of feeding, machining, and assembly locating are provided for a site, the work of field proofing and adjustment is simplified, and the installation efficiency and precision of the anchor chocks and the anchor mouths are enhanced.
Owner:CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY

Deepwater floating type multifunctional dry tree semi-submerged platform and marine installation method thereof

The invention relates to a deepwater floating type multifunctional dry tree semi-submerged platform and a marine installation method of the semi-submerged platform. The semi-submerged platform comprises a main hull, an upper component block and a group mooring system. The main hull comprises an upper floating body, a lower floating body and a telescopic connecting vertical column, wherein a ballast tank and a functional cabin are arranged in the upper floating body, a channel allowing a tension type vertical pipe, a production vertical pipe and/or a drilling vertical pipe to pass through conveniently is formed in the middle of the lower floating body, and the upper floating body and the lower floating body are connected through the telescopic connecting vertical column. The main hull can be switched between a folded state and an unfolded state through the telescopic connecting vertical column, and the lower floating body is located next to the lower portion of the upper floating body in the folded state, and the lower floating body keeps a certain distance from the upper floating body in the unfolded state. The upper component block is installed on the upper portion of the upper floating body and comprises upper facilities. The group mooring system comprises multiple mooring ropes which are connected with the upper floating body. The deepwater floating type multifunctional drytree semi-submerged platform is simple in technique, low in installation cost and capable of being widely applied to oil-gas field development under a deepwater marine environment condition.
Owner:CHINA NAT OFFSHORE OIL CORP +1

A method and an arrangement for reducing the weight and optimizing the longitudinal strength of a water-craft

A method and arrangement for reducing the weight and optimizing the longitudinal strength of a water-craft (1), which is especially suitable for transportation of liquefied natural gas (LNG) or other corresponding mediums and comprises a hull (2), which has a deck (3) extending over at least the main part of the water-craft (1) and a number of substantially spherical cargo tanks (4) arranged successively in the longitudinal direction (A) of the water-craft (1) and a deckhouse (5), which extend substantially above the said deck (3). The hull (2) of the water-craft (1) is provided with a continuous protective casing structure (6) known as such and which is arranged on top of the cargo tanks (4). The said deck (3) of the water-craft is arranged on the hull (2) so that the proportion of its height measured from the bottom of the water-craft to the height of the uppermost continuous portion of the protective casing structure (6) on top of the cargo tanks (4) is at most 0.55, preferably at most 0.5. In addition said protective casing structure (6) is fixed to said deck (3) and/or other structures (7) supported to the hull (2) and is dimensioned together with the other parts of the hull (2) so that together they constitute an essential part of the overall strength of the water-craft.
Owner:STX FINLAND OY
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