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39results about How to "Low damping" patented technology
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Dampers for mountain bikes
InactiveUS20110127706A1Adjustable levelIncrease dampingSpringsNon-rotating vibration suppressionControl theoryTimer
An apparatus of a damper (46) for a bicycle comprising a housing defining a chamber, and a piston, movable in the chamber along a first direction. The apparatus further comprises a controllable means to vary the resistance to movement of the piston in the chamber, a sensor (62), and a controller (58) including a timer. Said sensor measures at least one dynamic quantity and produces an output signal based thereon. Said output signal is received by the controller, and said controller controls said controllable means based on said dynamic quantity as a function of time to control the level of damping. The invention further provides means for manually adjusting the level of rebound damping.
Owner:UNIV OF SHEFFIELD
Method of suppressing interferences in systems for detecting objects
InactiveUS20060036353A1Eliminates transient interferenceEasy to implementDigital technique networkTemperatue controlPulse sequenceTime space
In a method for suppressing interferences while detecting objects in a target area, a transmitter transmits a sequence of pulses into the target area, and a receiver detects the resulting reflection signal of the pulses reflected from the objects, within successive time windows that are referenced to the moment of transmitting an individual pulse and thus represent distance gates. The time spacing between the successive individual pulses is variable and randomized according to the pseudo-noise principle within predetermined limits, and the time windows are adapted accordingly. The received reflection signal may be sampled, digitized, digitally pre-processed and digitally filtered in the individual distance gates. A non-linear digital filter, preferably a sliding median filter, is used for the filtering to suppress transient disturbances. The median is determined from an odd number of consecutive sampled values of a reflection signal detected within a distance gate.
Owner:A D C AUTOMOTIVE DISTANCE CONT
Dampers for mountain bikes
InactiveUS8770357B2Increase dampingLow dampingSpringsNon-rotating vibration suppressionControl theoryTimer
Owner:UNIV OF SHEFFIELD
Angled opto-mechanical device
InactiveUS6402389B1Improve matchEasy to polishCoupling light guidesFibre mechanical structuresBiomedical engineering
The present invention relates to an angled opto-mechanical connector (10) and to a manufacturing process for the same. The connector (10) comprises a fixture (1) with straight and parallel grooves (2, 3) of two sizes running on the upper side of the fixture (1) from a first fixture side (1a) to a second fixture side (1b). A lid (4) is fastened above the fixture (1). Fibre ends (8a) of optical fibres (8) are placed in the capillaries which are formed between the smaller grooves (2) of the fixture and the lid (4) in such a way that they stick out through the side of the fixture (1b). A plastic capsule (11) encloses the fixture (1), the lid (4) and the fibres (8) completely or partially. The fibres (8) stick out from the plastic capsule (11) in a direction separated from that defined by the grooves of the fixture. The connector (10) can also have an opto-mechanical interface of the above mentioned type at its other end (10b).
Owner:TELEFON AB LM ERICSSON (PUBL)
Assembly for drilling and logging, method for drilling and logging and device for electro pulse drilling
ActiveUS20100212962A1Easy to controlLess occurrenceSurveyDisloding machinesDrill holeBiomedical engineering
Assembly for drilling and logging, comprising a device for electro pulse drilling (EPD device), at least one device to receive acoustic signals generated by the EPD device, distinguished in that the assembly further comprises at least one device to receive electromagnetic signals generated by the EPD device. Method for drilling and logging, and device for electro pulse drilling.
Owner:DEN NORSKE STATS OLJESELSKAP AS
Whole angle MEMS gyroscope
ActiveUS20160341551A1Low dampingHigh sensitivitySpeed measurement using gyroscopic effectsGyroscopes/turn-sensitive devicesGyroscopeTransducer
According to one aspect, embodiments herein provide a gyroscope comprising a central anchor, a plurality of internal flexures, a plurality of masses, each mass coupled to the central anchor via at least one of the plurality of internal flexures and configured to translate in a plane of the gyroscope, and a plurality of mass-to-mass couplers, each mass-to-mass coupler coupled between two adjacent masses of the plurality of masses, and a plurality of transducers, each configured to perform at least one of driving and sensing motion of a corresponding one of the plurality of masses, wherein the plurality of transducers is configured to drive the plurality of masses in at least a first vibratory mode and a second vibratory mode.
Owner:CHARLES STARK DRAPER LABORATORY
Damping force control apparatus
ActiveUS20120010780A1Comfortability can be improvedAvoid/suppress degradation of comfortabilityDigital data processing detailsAnimal undercarriagesStep numberSnubber
A control mode for a damping force characteristic is set to be a variable control when a product of the sum xb′ of sprung member speeds and a sprung-member-unsprung-member-relative-speed xs″ is positive. Accordingly, when the vibration in a middle / high frequency range is not being input to a suspension apparatus, an operation of a variable throttle mechanism is controlled so that a step number representing the damping force characteristic of a damper varies with a vibration state of a sprung member HA based on a Nonlinear H∞ control theory. When the product of xb′ and xs′ is negative, the control mode is set to be an operation prohibiting control. When the vibration in the middle / high frequency range is input to the suspension apparatus, operation of the variable throttle mechanism is prohibited, and suppresses an increase in the operation frequency or in the operation amount of the variable throttle mechanism.
Owner:TOYOTA JIDOSHA KK
Method of suppressing interferences in systems for detecting objects
InactiveUS7463181B2Eliminate distractionsEasy to implementDigital technique networkRadio wave reradiation/reflectionPulse sequenceAcoustics
In a method for suppressing interferences while detecting objects in a target area, a transmitter transmits a sequence of pulses into the target area, and a receiver detects the resulting reflection signal of the pulses reflected from the objects, within successive time windows that are referenced to the moment of transmitting an individual pulse and thus represent distance gates. The time spacing between the successive individual pulses is variable and randomized according to the pseudo-noise principle within predetermined limits, and the time windows are adapted accordingly. The received reflection signal may be sampled, digitized, digitally pre-processed and digitally filtered in the individual distance gates. A non-linear digital filter, preferably a sliding median filter, is used for the filtering to suppress transient disturbances. The median is determined from an odd number of consecutive sampled values of a reflection signal detected within a distance gate.
Owner:A D C AUTOMOTIVE DISTANCE CONT
Flat panel loudspeaker arrangement
InactiveUS7062064B2Conserve construction materialPleasant tonal responseMicrophonesLoudspeakersLoudspeakerFlat panel
A flat panel loudspeaker arrangement with several panel loudspeakers of similar construction is disclosed. The panel loudspeakers are arranged seamlessly side-by-side and are rigidly connected with one another along their respective edges with a high shear strength. The panel loudspeakers can be supported by an existing stable wall.
Owner:HARMAN AUDIO ELECTRONICS SYST
Resonator
ActiveUS20150143905A1Efficient amplificationLow dampingAcceleration measurement using interia forcesImpedence networksEngineeringHelical resonator
A micro-electro-mechanical device with a closed feed-back damping loop is provided. Displacement in the mechanical resonator is opposed with a damping force determined by the closed feed-back loop that comprises a filter with a peaked frequency response, and associated phase adjustment. An oscillation-free configuration that allows high signal amplification is achieved.
Owner:MURATA MFG CO LTD
Vehicle power assembly suspension and vehicle comprising same
ActiveCN104074920AMounting stiffness adjustmentReduce stiffnessSpringsJet propulsion mountingVehicle framePowertrain
The invention discloses a power assembly suspension and a vehicle comprising same. The power assembly suspension comprises a rubber body, a sensor, a first magnetic component, a second magnetic component and a controller; the interior of the rubber body is provided with an accommodation chamber; the rubber body is provided with a power assembly connecting structure and a frame connecting structure; the sensor is arranged between the rubber body and the power assembly connecting structure; the sensor comprises a pressure sensor and or an acceleration sensor; the first magnetic component and the second magnetic component are respectively fixed on the wall of the accommodation chamber; at least one of the first magnetic component and the second magnetic component is an electromagnet; the controller is connected with the sensor and the electromagnet. The power assembly suspension is simple in structure and small in size, adaptively adjusts parameters such as the self-stiffness according to the vibration condition of an engine to adapt to the vibrational frequency of the engine and accordingly well attenuates the engine vibration and improves the damping effect.
Owner:GREAT WALL MOTOR CO LTD
Layered heusler alloys and methods for the fabrication and use thereof
ActiveUS9643385B1High spin polarizationLow dampingSpin-exchange-coupled multilayersElectrical equipmentMetallurgyCrystal structure
Disclosed herein are layered Heusler alloys. The layered Heusler alloys can comprise a first layer comprising a first Heusler alloy with a face-centered cubic (fcc) crystal structure and a second layer comprising a second Heusler alloy with a fcc crystal structure, the second Heusler alloy being different than the first Heusler alloy, wherein the first layer and the second layer are layered along a layering direction, the layering direction being the [110] or [111] direction of the fcc crystal structure, thereby forming the layered Heusler alloy.
Owner:UNIVERSITY OF ALABAMA
High-energy consumption self-decoupling magnetorheological damper
The invention relates to a high-energy consumption self-decoupling magnetorheological damper with damping force decoupling property and failure self-protection function. The damper not only has high energy consumption and output, but also can effectively prevent subsidence of magnetorheological fluid, therefore, the invention is suitable for civil engineering structures. The damper mainly comprises a master cylinder body (6), an auxiliary cylinder body (13), a main piston (8), two auxiliary pistons (23), a piston rod (25), and novel composite-structure energy accumulators (14 and 15). Permanent magnets (9) arranged in the main piston (8) and the two auxiliary pistons (23) can effectively prevent subsidence of magnetorheological fluid, and can still provide corresponding damping force under the condition of power supply failure to enhance the safety of the structure. Magnetic circuit guiding components improve the utilization factor of the magnetic field. A mechanical spring self-decoupling device is mainly operated on the condition that the damper is under low-frequency driving, thereby overcoming the disadvantage of low output of the damper under low-frequency driving.
Owner:HOHAI UNIV +1
Hybrid Electromagnetic-Acoustic Distal Targeting System
ActiveUS20080170473A1Quality improvementReduce system complexityElectrotherapyNon-electrical signal transmission systemsBone implantEngineering
A data transmission system connected to a bone implant has an extra-corporeally arranged external transmitting unit an implantable internal first receiving unit adapted to be actuated by the external transmitting unit. An internal transmitting unit is adapted to be coupled and implanted to the implant. A second transmission section is located between the external transmitting unit and the internal first receiving unit, via which the internal transmitting unit is actuated. A second receiving unit and a first transmission section is located between the internal transmitting unit and the second receiving unit. The first transmission section operates with acoustic vibrations or waves.
Owner:STRYKER EURO OPERATIONS HLDG LLC
Antivibration Support
InactiveUS20080169592A1Mitigate such drawbackHigh dynamic stiffnessMachine framesMultiple spring combinationsEngineeringElastomer
An antivibration support disposed for supporting and dampening loads between external elements, comprising a first and a second rigid member for securing to the external elements, and an elastomer body, connecting respectively the first and second rigid members.The support also comprises a second body, having dissimilar material properties from the elastomer body, acting in parallel with the elastomer body to support and dampen the loads.
Owner:PAULSTRA CRC
Assembly for drilling and logging, method for drilling and logging and device for electro pulse drilling
ActiveUS8479841B2Easy to controlLess occurrenceSurveyConstructionsBiomedical engineeringElectromagnetic signal
Owner:DEN NORSKE STATS OLJESELSKAP AS
Pu-roll and method to produce same
The present invention relates to a method for producing a roller shell or roller covering of a roller from a PPDI-based polyurethane. To avoid stress cracks, the intention is to overcome the inadequacy in green strength as quickly as possible by the hardener that is added to the polyurethane bringing the pot time down to 5 to 60 seconds. The present invention also relates to a PPDI polyurethane for producing a roller shell or roller covering of a roller formed by mixing a PPDI prepolymer with a hardener, in particular for carrying out the method, wherein 60 to 99% by weight of the hardener is 1,4-butane diol, at most 40% by weight is diamine and at most 1% by weight is a catalyst.
Owner:VOITH PATENT GMBH
Resonator
ActiveUS20140001984A1Efficient amplificationLow dampingAcceleration measurement using interia forcesImpedence networksSignal processingMechanics
A mechanical resonator with a closed feed-back damping loop is provided. Displacement in the mechanical resonator is opposed with a damping force determined by the closed feed-back loop that comprises a signal processing filter with associated phase adjustment. An oscillation-free configuration that allows high signal amplification is achieved.
Owner:MURATA MFG CO LTD
Whole angle MEMS gyroscope on hexagonal crystal substrate
ActiveUS10317210B2Easy to makeLow dampingSpeed measurement using gyroscopic effectsGyroscopes/turn-sensitive devicesGyroscopeTransducer
According to one aspect, embodiments herein provide a gyroscope comprising an axially symmetric structure, and a plurality of transducers, each configured to perform at least one of driving and sensing motion of the axially symmetric structure, wherein the plurality of transducers is configured to drive the axially symmetric structure in at least a first vibratory mode and a second vibratory mode, and wherein the gyroscope is implemented on a hexagonal crystal-based substrate.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY +1
Microelectromechanical device, a microelectromechanical system, and a method of manufacturing a microelectromechanical device
ActiveUS20180029878A1Reduce noiseIncrease frequencyDecorative surface effectsSolid-state devicesBiomedical engineeringMicroelectromechanical systems
A microelectromechanical device, a microelectromechanical system, and a method of manufacturing a microelectromechanical device, wherein the microelectromechanical device may include: a substrate; a diaphragm mounted to the substrate; a first electrode mounted to the diaphragm; a second electrode mounted to the substrate; wherein the first electrode is laterally adjacent to the second electrode; and wherein the diaphragm is arranged over a gap between the first electrode and the second electrode.
Owner:INFINEON TECH AG
Damping force control apparatus
ActiveUS8321087B2Comfortability can be improvedAvoid/suppress degradation of comfortabilityDigital data processing detailsAnimal undercarriagesStep numberSnubber
A control mode for a damping force characteristic is set to be a variable control when a product of the sum xb′ of sprung member speeds and a sprung-member-unsprung-member-relative-speed xs′ is positive. Accordingly, when the vibration in a middle / high frequency range is not being input to a suspension apparatus, an operation of a variable throttle mechanism is controlled so that a step number representing the damping force characteristic of a damper varies with a vibration state of a sprung member HA based on a Nonlinear H∞ control theory. When the product of xb′ and xs′ is negative, the control mode is set to be an operation prohibiting control. When the vibration in the middle / high frequency range is input to the suspension apparatus, operation of the variable throttle mechanism is prohibited, and suppresses an increase in the operation frequency or in the operation amount of the variable throttle mechanism.
Owner:TOYOTA JIDOSHA KK
Vibrating machine with a bearing device and method of operating a vibrating machine
ActiveUS20200300332A1Increased displacement is preventedReduce displacementSievingScreeningMachine partsAir spring
A vibrating machine including a first machine part that vibrates in operation, a second machine part connected to an installation area of the vibrating machine, and a vibratory drive. A resilient bearing is arranged between the machine parts and has at least one air spring per support point and at least one compressed air reservoir fluidically connected to the air spring. A throttle is switched intermediate the air spring and the compressed air reservoir. The first machine part bearing has a resonant or natural frequency lower than an operating frequency of the vibrating machine. The bearing system has a frequency-dependent lower stiffness level with high damping at low frequencies, an upper stiffness level with low damping at higher frequencies, and a transition zone at an intermediate transitional frequency. The throttle is dimensioned such that the transitional frequency is close to, preferably slightly above, the resonant or natural frequency.
Owner:SPALECK GMBH & CO KGAA
Optical Connector
InactiveUS20070217746A1Simple and quick and cost-effective to produceQuality improvementCoupling light guidesFiberIn vehicle
The invention relates to a connector for establishing multi media connections in vehicles according to MOST®-standard. The objective is to provide an optical connector, which is simple, quick and inexpensive to manufacture, providing an optical connection with low damping, high precision and durability. The MOST-connector comprises at least one optical terminal with a fiber receiving sleeve, wherein the optical fiber section is located, wherein the optical fiber section is affixed directly to the fiber receiving sleeve through clamping elements. According to the invention the fiber receiving sleeve comprises a front side in the area of the front optical contact surface of the optical fiber section, wherein the clamping elements or latching notches are longitudinally spaced from the front side of the fiber receiving sleeve.
Owner:MOLEX INC
Calender and process for operating a calendar
Owner:VOITH PATENT GMBH
Active electric torsional vibration damper and method to realize the same
InactiveUS8707822B2Eliminate torsional vibrationLow dampingRotating vibration suppressionWave amplification devicesTorsional vibrationControl theory
The present invention provides an active electric torsional vibration damper and a method to realize the same. The invention relates to the field of vibration reduction technology for rotating machinery. The damper comprises a fixed module, a relative rotating module, conducting coils, magnetic-field producing elements. The present invention can be used to produce transient anti-torsion which is same in frequency, opposite in direction and corresponding in amplitude to achieve the effect of eliminating torsional vibration on the original shaft system. The damper realizes a prominent effect of eliminating torsional vibration without complex measures.
Owner:LUO QING
Calender and process for operating a calendar
InactiveUS6857356B2Extended service lifeSimple calculationCalendersShaping pressEngineeringMechanical engineering
Owner:VOITH PATENT GMBH
Optical connector
InactiveUS7553090B2Simple and quick and cost-effective to produceQuality improvementCoupling light guidesFiberIn vehicle
The invention relates to a connector for establishing multi media connections in vehicles according to MOST®-standard.The objective is to provide an optical connector, which is simple, quick and inexpensive to manufacture, providing an optical connection with low damping, high precision and durability.The MOST-connector comprises at least one optical terminal with a fiber receiving sleeve, wherein the optical fiber section is located, wherein the optical fiber section is affixed directly to the fiber receiving sleeve through clamping elements. According to the invention the fiber receiving sleeve comprises a front side in the area of the front optical contact surface of the optical fiber section, wherein the clamping elements or latching notches are longitudinally spaced from the front side of the fiber receiving sleeve.
Owner:MOLEX INC
High-energy consumption self-decoupling magnetorheological damper
Owner:HOHAI UNIV +1
Hybrid electromagnetic-acoustic distal targeting system
ActiveUS8491660B2Low dampingReadily be miniaturisedElectrotherapyNon-electrical signal transmission systemsBone implantEngineering
Owner:STRYKER EURO OPERATIONS HLDG LLC
Electric vibration exciter and implementation method thereof
InactiveCN109990887ALow dampingGood dynamic frequency response performanceSubsonic/sonic/ultrasonic wave measurementUsing electrical meansPhysicsMagnetic tension force
The embodiment of the invention relates to the field of excitation technology of rotating machinery, and discloses an electric vibration exciter, comprising: a shaft system vibration measurement structure used for measuring a torsional vibration signal of a shaft system in real time; a torsional vibration exciter used for generating excitation, and comprising a magnetic force module and a coil module, wherein the coil module comprises a core body and a conductive coil wound and fixed on the core body, the magnetic force module comprises a magnetic field generator, the magnetic field generatoris used for generating a magnetic field capable of passing through the conductive coil, the coil module and the magnetic force module perform reciprocating rotation relative to each other under the action of the magnetic field, one of the coil module and the magnetic force module is rigidly fixed with an enclosure, and the other one of the coil module and the magnetic force module is rigidly fixedwith the shaft system; a torsional electric signal loading module used for loading a control electrical signal to the conductive coil; and a signal processing module used for obtaining the inherent frequency of the shaft system based on the torsional vibration signal and the control electrical signal. The electric vibration exciter provided by the invention not only has a relatively large outputtorque, but also has relatively high working frequency.
Owner:罗清
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