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186results about How to "Suppress swing" patented technology
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Nonlinear coupling control method for bridge crane based on generalized movement of load
InactiveCN102765665AGuaranteed validityValidity relaxationLoad-engaging elementsStability theoryStabilization control
The invention provides a nonlinear coupling control method for a bridge crane based on generalized movement of a load by aiming at an under-actuated crane system. The nonlinear coupling control method has good trolley positioning and load hunting elimination performances. Compared with an existing crane control method, the method is applicable to not only stabilization control but also trajectory tracking control. The method includes: designing a signal similar to horizontal displacement of the load, and constructing a novel error signal on the basis, so that the coupling relation between a trolley and the load is enhanced. According to the novel nonlinear coupling control method, the crane system is converted into an interconnected system consisting of a load hunting sub-system and an error signal sub-system. The control performance of a closed-loop system is proved by means of inputting the state stability theory and the LaSalle's invariant principle. Experimental results show that good control effects can be obtained by the control method, and the method has good practical application values.
Owner:NANKAI UNIV
Bearing unit for wheel and method of manufacturing the bearing unit
ActiveUS20060002644A1Swing can be suppressedHigh dimensional accuracyRolling contact bearingsBearing assemblyEngineeringFlange
Respective constituent members of a wheel bearing unit 5 are assembled and also a cover 74 is fixed to an inner end portion of an outer ring 6. The wheel bearing unit 5 is fitted to a turning machine 38 in a state that a space in which an encoder 72 is provided is sealed tightly from an outside by fitting a stop plug 96 into an insertion hole 84 provided in the cover 74. A top end portion of a rotating shaft 40 of a turning machine 38 is engaged with an engaged concave portion 102 provided to a hub 8a. A turning process is applied to an outer side surface of a rotary flange 13 while turning the hub 8a around the outer ring 6 by the rotating shaft 40, and thus the outer side surface is processed in predetermined shape and dimension.
Owner:NSK LTD
Coolant-buffered, vapor-compression refrigeration with thermal storage and compressor cycling
ActiveUS8783052B2Improve cooling effectSuppress swingHeat storage plantsCompression machines with non-reversible cycleThermal energy storageEngineering
Owner:INT BUSINESS MASCH CORP
Ceiling fan
InactiveUS20110052411A1Reduce occurrence of abnormalityReduce operationPump componentsReaction enginesCeiling fanEngineering
A ceiling fan including a connecting fitting fixed to a ceiling, and a ceiling fan main body suspended from the connecting fitting via a suspension device. The ceiling fan main body includes a motor for rotating a plurality of blades attached in a horizontal direction, a shaft protruding to an upper part of the motor, and a joint portion fixed on an upper part of the shaft. The suspension device includes a first connecting portion capable of being movably mounted on the connecting fitting, and a second connecting portion located in a lower part of the first connecting portion. The joint portion is movably mounted on the second connecting portion.
Owner:PANASONIC CORP
Method and apparatus for the reliquefaction of a vapour
Boiled off liquefied natural gas flows from a storage tank and is compressed in vapour compression stages. The resulting compressed vapour is condensed in a condenser and the condensate returned to the tank. The condenser is cooled by a working fluid, for example nitrogen, flowing in a Brayton cycle. The Brayton cycle includes a heat exchanger which removes heat of compression from the compressed natural gas vapour upstream of its passage through the condenser. In addition a part of the working fluid is withdrawn from a region of the Brayton cycle intermediate the working fluid outlet from the condenser and the working fluid inlet to the heat exchanger and the withdrawn working fluid flows through another heat exchanger in which it removes heat of compression from the natural gas vapour intermediate the compression stages. The withdrawn working fluid is returned to the Brayton cycle.
Owner:CRYOSTAR
Navigation control device and navigation control method applicable to collaborative transportation of cranes
InactiveCN103863948ASuppress swingStrong computing powerLoad-engaging elementsProgramme total factory controlFlight vehicleGlobal position system
The invention aims at solving the problems of collaborative transportation of current cranes and provides a network-based multi-crane collaborative transportation navigation system and a network-based multi-crane collaborative transportation navigation method, wherein the system and the method are applicable to large heavy-load and complex working conditions, reliable in performance and strong in adaptability. The system comprises a network operation monitoring server, a loading box lower computer, a four-axis aerial photographing aircraft, a loading box condition monitoring module, a wireless communication device, a loading box position indication light, a crane condition monitoring module and a crane lower computer. According to the navigation control method, sequential and accurate collaboration of a whole crane queue can be ensured by planning a comprehensive line in a manner of combining data fed back by the crane lower computer and the loading box lower computer with GPS (Global Position System) information and weather information and monitoring action and direction of each individual crane. The device and the method have the beneficial technical effects of being capable of effectively inhibiting the swinging of heavy goods caused by complex road conditions in a transportation process and applicable to transportation of precise, valuable and large loads.
Owner:HEFEI UNIV OF TECH
Gantry-type XY stage
InactiveUS7239161B2Reduce swingReduce weightSemiconductor/solid-state device manufacturingMaterial analysis by optical meansEngineeringLaser
Nine vibration isolating mounts are disposed on a pedestal, and a granite plate is placed thereon. A pair of guide bases are disposed on the granite plate, and disposed thereon are a pair of posts made of CFRP for movements in a Y-direction relative to the granite plate. A beam made of CFRP is extended between the pair of posts. Further, a movement base is disposed for movement in an X-direction relative to the beam, and a laser optical unit is mounted on the movement base.
Owner:LASERFRONT TECH
Fuzzy logic-based control method for helicopters carrying suspended loads
InactiveUS20120046810A1Suppress swingDigital data processing detailsNavigation instrumentsFeedback controllerTime delays
The fuzzy logic-based control method for helicopters carrying suspended loads utilizes a controller based on fuzzy logic membership distributions of sets of load swing angles. The anti-swing controller is fuzzy-based and has controller outputs that include additional displacements added to the helicopter trajectory in the longitudinal and lateral directions. This simple implementation requires only a small modification to the software of the helicopter position controller. The membership functions govern control parameters that are optimized using a particle swarm algorithm. The rules of the anti-swing controller are derived to mimic the performance of a time-delayed feedback controller. A tracking controller stabilizes the helicopter and tracks the trajectory generated by the anti-swing controller.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Guide reed swing position adjusting device of double raschel machine
A guide reed swing position adjusting device of a double raschel machine capable of facilitating the adjustment of a swing position by simplifying the structure of the guide reed drive mechanism of the double raschel machine to suppress the excessive swing motion of a guide reed when a broad texture is knitted, wherein the guide reed having front ground yarn reeds (5a), connecting yarn reeds (5c), and rear ground yarn reeds (5b) is installed against front and rear two rows of needle rows (1a) and (1b), a means for causing and synthesizing a swing displacement other than the swing of the front and rear ground yarn reeds in synchronism with the swing of the connecting yarn reeds, and a swing displacement independent of the swing displacement of the connecting yarn reeds is added to the front and rear ground yarn reeds so that the positions of the front and rear ground yarn reeds acting on the needle rows can be adjusted.
Owner:NIPPON MAYER
Hybrid multi-terminal direct current power transmission system and inverter station and control method thereof
ActiveCN104993509AImprove robustnessReduce overheadElectric power transfer ac networkConversion with reversalTransmission linePower transmission
The invention provides a hybrid multi-terminal direct current power transmission system and an inverter station and a control method thereof. The hybrid multi-terminal direct current power transmission system comprises a rectification station comprising an LCC, at least two inverter stations comprising VSCs, a voltage detection component and a VSC control system on the side of the inverter stations. Under the condition that a detected direct current voltage value is lower than a predetermined value, a part of the VSCs are controlled to be switched from an inversion mode to a rectification mode and the rest of the VSCs are controlled to main the inversion mode and the VSC working in the rectification mode are controlled so that the direct current voltage thereof basically maintain the predetermined value. The detection for the drop of the direct current voltage of direct current transmission lines and the control of the operation modes of the VSCs of the inverter stations are performed on the side of the inverter stations, so that the rectification station and the inverter stations can separately take corresponding actions (decentralized control) so solve the problem that some converter stations cannot cut the power supply after the rectification station retreats from a hybrid multi-terminal direct current system without rapid inter-station communication.
Owner:HITACHI ENERGY SWITZERLAND AG
Baby band
InactiveCN1870920ASuppress swingChildren furnitureBucklesPhysical medicine and rehabilitationPhysical therapy
Owner:COMBI CORP
Motor connecting member and motor device
ActiveUS9419491B2Firmly connectedSuppress swingSupports/enclosures/casingsWindings conductor shape/form/constructionEngineeringConductor Coil
Owner:HITACHI METALS LTD
Lifting type conveyor
The invention provides a lifting type conveyer (1) capable of preventing the sway of the load (P) and safely conveying the load (P) and increasing the lifting range of the load (P). The lifting type conveyer (1) comprises an upper frame (3) suspended on a carriage running on a conveying trail ( R ), a lower frame (4) liftably mounted below the upper frame (3) with a hanging frame (6); a first sway prevention frame (7) with a first upper frame (7a) and a first lower frame (7b) and capable of correspondingly folding or extending along with the lifting of the lower frame (4), wherein the first upper frame (7a) is approximately of upside-down triangle and in axle suspension on the upper frame (3) and the first lower frame (7b) is longitudinal symmetry with the first upper frame (7a) and the lower end of the first upper frame is in axle connection with the upper end; and a second sway prevention frame (8) longitudinal symmetry with the first sway prevention frame (7) and vertically extending on the horizontal plane opposite to the upper border of the first upper frame (7a).
Owner:NAKANISHI METAL WORKS CO LTD
Spun yarn drawing apparatus
ActiveCN103510233APrevent slidingLight in massArtificial filament heat treatmentNon-woven fabricsYarn
A spun yarn drawing apparatus is disclosed, which is capable of inhibiting swinging of a yarn which is located between two rollers and does not contact with the rollers. The spun yarn drawing apparatus (2) includes godet rollers (14 to 18). The rotating directions of the adjacent two godet rollers in the advancing direction of the yarn (Y) are opposite. Each of the multiple godet rollers (14 to 18) is wound and hung with the yarn (Y) along the rotating direction at a winding angle of 360 degrees or lower. Among the multiple godet rollers (14 to 18), a non-contact length (Lf) of the yarn between the adjacent two godet rollers in the advancing direction of the yarn (Y) is shorther than a contact length (Lc) of the yarn (Y) with respect to each of the adjacent two godet rollers in the advancing direction of the yarn (Y).
Owner:TMT MACHINERY INC
Carrier system and method for controlling carrier system
A carrier system capable of rapidly carrying a cargo includes: a circulation rail which is hung from above and includes a curved part; a plurality of carriers, each of which includes a travelling vehicle that travels along the circulation rail and a lift stage that is liftably hung on the travelling vehicle and serves to hold a cargo, and each of which lifts and lowers the lift stage while traveling along the circulation rail; a plurality of racks which are arranged in parallel along the circulation rail, and each of which includes a plurality of placement parts arranged in parallel in a vertical direction; and a controller which selects any of the plurality of placement parts as a storing position of the cargo and instructs the carrier that holds the cargo out of the plurality of carriers, about the storing position.
Owner:MURATA MASCH LTD
Level indicator for snow plow
InactiveUS20080052929A1Suppress swingDrilling/boring measurement devicesMeasurement/indication equipmentsEngineeringWater level
A level indicator for a snow plow assembly has a reference wand and a pendulum guage pivoted to the reference wand. The reference wand has a bend at a top end with a reference mark to lie over the pendulum. The pendulum guage has a counterweight to dampen its swing and has an indicator. The indicator aligns with the reference mark in a level position of the snow plow assembly and the swing of the pendulum is limited by interference with the reference wand between extreme positions where the snow plow assembly is tilted.
Owner:ADEPCO TECH
Storage container for substrate and substrate conveying device for the storage container
InactiveCN101670919APrevent intrusionEasy to disassembleSemiconductor/solid-state device manufacturingCharge manipulationEngineeringMechanical engineering
Owner:DAIFUKU CO LTD
Paper feeder and image forming apparatus
ActiveUS20150102552A1Reduce widthSuppress swingRegistering devicesFunction indicatorsLocking mechanismImage formation
A paper feeder includes a recording-media container, a width regulating member, and a locking mechanism. The recording-media container is attachable to and detachable from a body of an image forming apparatus. The recording-media container stores a recording medium. The width regulating member regulates a position in a widthwise direction of the recording medium stored in the recording-media container. The locking mechanism steplessly changes a movable range of the width regulating member in the widthwise direction. The width regulating member includes a lever configured to cooperate with the width regulating member to hold the locking mechanism so as to bring the locking mechanism into an unlocked state. The locking mechanism in a locked state restricts movement of the width regulating member in the widthwise direction, and regulates wobbling of the width regulating member in a direction orthogonal to the widthwise direction.
Owner:KONICA MINOLTA INC
Double-hoist, double-spreader bridge crane experimental facility
A double-hoist, double-spreader bridge crane experimental facility comprises a trolley fixed on the supporting frame of a gantry, the trolley is connected with the gantry through a driving mechanism, lift control motors are respectively arranged on both sides of the trolley, reels connected with the motors are connected with spreaders through swing ropes, swing angle-measuring devices are arranged on the lower end of the trolley, and signal processors are arranged on the upper end of the trolley; each swing angle-measuring device comprises a rotary rocker assembly arranged inside, the rotary rocker assembly comprises a big semicircular rocker and a small semicircular rocker which are crossed by each other, and grating measuring devices are respectively arranged on one end of the big semicircular rocker and one end of the small semicircular rocker; each grating measuring device comprises a grating disk, a lens and an indicating grating are arranged by both sides of the grating disk, an LED (light-emitting diode) point light source is arranged by one side of the lens, and a photoelectric element is arranged by one side of the indicating grating, and is connected with one of the signal processors through a signal cable. The double-hoist, double-spreader bridge crane experimental facility does not need additional sensors or detectors, the cost is low, the structure is simple, and the double-hoist, double-spreader bridge crane experimental facility is convenient to use.
Owner:SHANGHAI MARITIME UNIVERSITY
Elevator cable swing suppression system
ActiveCN104276481ASuppress swingThe swing suppression system is used to suppress theElevatorsMechanical engineeringEngineering
The invention provides an elevator cable swing suppression system capable of effectively suppressing the swing of a main cable even when being installed at tall buildings. According to the embodiments of the invention, the elevator cable swing suppression system (20) comprises a swing suppression member (30) arranged in front of a main cable (4) to move freely along the anterior-to-posterior direction and suppress the swing of the main cable (4); and a swing suppression member moving mechanism (40) used for moving the swing suppression member (30). During the rising process of an elevator car (3), the swing suppression member moving mechanism (40) drives the swing suppression member (30) to move forwards. During the declining process of the elevator car (3), the swing suppression member moving mechanism (40) drives the swing suppression member (30) to move backwards.
Owner:TOSHIBA ELEVATOR KK
Method for accurately positioning bridge cranes and planning tracks in online manner on basis of phase plane analysis
ActiveCN105858481AImprove work efficiencySuppress swingLoad-engaging elementsLaser rangingAutomatic control
The invention discloses a method for accurately positioning bridge cranes and planning tracks in an online manner on the basis of phase plane analysis. The 32t bridge cranes can be automatically controlled by the aid of the method, and the method is excellent in positioning and anti-swing performance. The method includes simplifying system dynamics models and providing principles of phase plane processes; testing running characteristics of the industrial cranes in fields, analyzing the running characteristics and providing a process for planning the tracks in an online manner according to the running characteristics. The method has the advantages that track planning parameters are adjusted on an online manner by the aid of data of laser range finders in crane running procedures, grade braking schemes are adopted, theoretical analysis is carried out by the aid of analysis processes on the basis of phase planes, and system swing angles are proved to be close to zero when the bridge cranes reach target locations; the method is applied to automatic control systems of the 32t bridge cranes, excellent control effects can be realized, and accordingly the method has excellent practical application value.
Owner:NANKAI UNIV
Control optimization method for helicopters carrying suspended loads
InactiveUS8190307B2Suppress swingOptimization parametersCosmonautic vehiclesDigital data processing detailsTime delaysSoftware
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Method for controlling double UAVs (unmanned aerial vehicles) to cooperatively hoist rod-shaped rigid load
ActiveCN110579969AAvoid colliding with each otherImplement fixed-point hoveringAdaptive controlKinematicsControl objective
The invention discloses a method for controlling double UAVs to cooperatively hoist a rod-shaped rigid load, and provides the modeling and control method aimed at a double UAV cooperative hoisting system in a plane. A complete system dynamic model is established by using a Lagrange modeling method, and the relative kinematic relationship between the two rotor UAVs and a load is analyzed. On the basis of the established model, a Lyapunov method is used for designing a controller, an outer loop stability analysis is carried out by combining a Lassalle invariance principle, and then a conclusionthat an expected balance point is asymptotically stable is obtained. According to the control scheme, the UAVs can be prevented from colliding with each other, a hoisting task is stably completed, fixed-point hovering is achieved, and swinging of the load is inhibited. According to an experiment result, the control objective can be completed, the two UAV are ensured to fly with respective expectedranges, and load swinging can be effectively inhibited.
Owner:NANKAI UNIV
Legged robot
InactiveUS20090260472A1Suppress swingLarge strideMechanical apparatusJointsLegged robotGravitational force
A legged robot is provided whose trunk link is not prone to wobble in the front-back direction during walking. The legged robot is equipped with a trunk link and a pair of legs. Each leg has a pitch joint capable of rotating the connected links in a plane that intersects with a line extending in a lateral direction of the robot. Rotation centers of the pitch joints are located above a center of gravity of the trunk link. The legged robot walks mainly by swinging the legs backward and forward around such rotation centers. Hence, the trunk link wobbles mainly in the front-back direction around the rotation centers as the robot walks. Because the center of gravity of the trunk link is located below the rotation centers, the gravitational force acting on the trunk link acts in a direction to suppress swinging of the trunk link during walking. Due to this, the trunk link of the legged robot is not prone to wobble in the front-back direction during walking.
Owner:TOYOTA JIDOSHA KK
Guide reed swing position adjusting device of double raschel machine
A guide reed swing position adjusting device of a double raschel machine capable of facilitating the adjustment of a swing position by simplifying the structure of the guide reed drive mechanism of the double raschel machine to suppress the excessive swing motion of a guide reed when a broad texture is knitted, wherein the guide reed having front ground yarn reeds (5a), connecting yarn reeds (5c), and rear ground yarn reeds (5b) is installed against front and rear two rows of needle rows (1a) and (1b), a means for causing and synthesizing a swing displacement other than the swing of the front and rear ground yarn reeds in synchronism with the swing of the connecting yarn reeds, and a swing displacement independent of the swing displacement of the connecting yarn reeds is added to the front and rear ground yarn reeds so that the positions of the front and rear ground yarn reeds acting on the needle rows can be adjusted.
Owner:NIPPON MAYER
Stable control method and system for offshore crane provided with double-pendulum characteristics
ActiveCN110937510AFully consider the disturbanceSuppress swingCranesLoad-engaging elementsDynamic modelsControl signal
The invention discloses a stable control method and system for an offshore crane provided with double-pendulum characteristics. The stable control method comprises the following steps: establishing adynamic model of a double-pendulum offshore crane; introducing an elevation angle of a suspension arm, length of a mooring rope between the gravity center of a lifting hook and the top end of the suspension arm, a swing angle of the lifting hook and a swing angle state variable of a lifted object, and converting the dynamic model into a novel dynamic model; defining mechanical energy of the double-pendulum offshore crane, and obtaining a nonlinear controller with a bounded control signal according to a derivative of the mechanical energy and the novel dynamic model; and realizing stable control on the offshore crane with the double-pendulum characteristics through the controller. By sufficiently taking disturbance caused by ship body rolling motion and heaving motion and the saturation problem of a performer into consideration, the nonlinear controller with the bounded control signal is designed, so that the controller still has very strong robustness in face of a non-zero initial swing angle, external disturbance, sea breeze influences and complex ship motion.
Owner:SHANDONG UNIV
Fuzzy logic-based control method for helicopters carrying suspended loads
InactiveUS8185259B2Suppress swingCosmonautic vehiclesAnimal undercarriagesTime delaysFeedback controller
The fuzzy logic-based control method for helicopters carrying suspended loads utilizes a controller based on fuzzy logic membership distributions of sets of load swing angles. The anti-swing controller is fuzzy-based and has controller outputs that include additional displacements added to the helicopter trajectory in the longitudinal and lateral directions. This simple implementation requires only a small modification to the software of the helicopter position controller. The membership functions govern control parameters that are optimized using a particle swarm algorithm. The rules of the anti-swing controller are derived to mimic the performance of a time-delayed feedback controller. A tracking controller stabilizes the helicopter and tracks the trajectory generated by the anti-swing controller.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Electronic control apparatus
InactiveUS20160082908A1Suppress swingAssociation with control/drive circuitsFluid braking transmissionEngineeringElectronic component
An electronic control apparatus includes an electric motor including a rotor and a stator; a circuit board configured to drivingly control the electric motor; and a housing unit accommodating the electric motor and the circuit board. A vehicle-body attaching portion of the housing unit is attached and fixed to a vehicle body. The vehicle-body attaching portion is located on one side of the rotor with respect to an extending direction of the rotor. At least one of both surfaces of the circuit board is a component-mounting surface. The circuit board is fixed to the housing unit in a state where the both surface of the circuit board extend along the rotor of the electric motor. A large-size electronic component is mounted on a vehicle-body-attaching-portion-side portion of a peripheral portion of the component-mounting surface which is close to the vehicle-body attaching portion.
Owner:HITACHI AUTOMOTIVE SYST LTD
Recording apparatus
A recording apparatus includes a recording head and a carriage. The carriage includes a slide member that is provided so that the position of the slide member relative to a carriage body is changeable in a direction where a gap between the recording head and a medium changes, and moves together with carriage body in the scanning direction, a gap adjusting cam that is interposed between the slide member and the carriage body, and, upon reception of the dead weight of the carriage, changes in the scanning direction relative to the slide member and the carriage body to change the gap, and a restriction section that restricts at least one of expansion of the interval between the carriage body and the gap adjusting cam and expansion of the interval between the gap adjusting cam and the slide member in such a way as to keep a predetermined gap.
Owner:SEIKO EPSON CORP
System passivity based underactuation bridge crane anti-interference anti-swing method
ActiveCN110980521ARealize anti-sway positioningRapid positioningLoad-engaging elementsTransient stateStructural engineering
The invention provides a system passivity based underactuation bridge crane anti-interference anti-swing method and belongs to the technical field of bridge crane anti-swing. The system passivity based underactuation bridge crane anti-interference anti-swing method comprises the following steps of S1, establishing a dynamical model of a bridge crane system; S2, establishing a friction force modeland a wind resistance model based on the dynamical model; and S3, constructing a controller based on the lyapunov function and used for overcoming system friction force and resistance according to thefriction force model and the wind resistance model. Through the system passivity based underactuation bridge crane anti-interference anti-swing method, the friction force and resistance in the systemcan be overcome, quick positioning of the crane system is realized, and swing of the system is effectively inhibited; moreover, the system is high in anti-interference capability and has high robustness. As anti-swing positioning of a trolley is realized well, the transient state control performance of the system is effectively improved.
Owner:WUHAN UNIV OF SCI & TECH
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