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30results about How to "Improve time lag" patented technology

Semi-active magnetic-current variable-piezoelectric feedback type damper

ActiveCN108729571AAdjust damping in real timeAdjust stiffness in real timeBridge structural detailsProtective buildings/sheltersMagnetic currentSemi active
The invention discloses a semi-active magnetic-current variable-piezoelectric feedback type damper, comprising an inner tube and an outer tube. A revolving shaft is arranged in the middle of the innertube, and is fixedly connected with two vanes which are arranged by the angle of 180 degrees in the inner tube. The vanes are hollow and provided with mass blocks inside respectively, the upper and lower ends of each mass block are connected with the inner wall of the corresponding vane through springs. Two thin plates are arranged in the inner tubes and perpendicular to the vanes respectively. The cavity of the inner tube is filled with magnetorheological fluid. Piezoelectric generator units are respectively arranged on the surfaces of the thin plates, and pressure sensors are respectively arranged at the tops of the piezoelectric generator units. The outer wall of the inner tube is wound with a field coil along the axis direction. The pressure sensors, the field coil, a controller and an electric power extracting and storing unit are in series connection to form a closed loop, wherein the controller and the electric power extracting and storing unit are arranged at the top of the inner tube.
Owner:SHANDONG UNIV

Hot melt sealant containing desiccant for use in photovoltaic modules

A thin film photovoltaic panel and a method for making same including providing a photovoltaic layer on a substrate having at least one edge; a sealant is applied in a liquid form by a pump on a planar surface of the substrate; an adhesive layer is applied between the first substrate and the second substrate, wherein the first adhesive layer is disposed between the photovoltaic layer and at least one of the first and second substrate; and the first and second are secured together to form the thin film photovoltaic panel. The sealant layer includes a desiccant material having a concentration of less than about 20 weight %, which increases the diffusion time lag time for the sealant to reach steady state, thereby extending the duration of the thin film photovoltaic panel.
Owner:QUANEX IG SYST INC

Energy-feed composite anti-galloping energy dissipation spacer

The invention discloses an energy-feed composite anti-galloping energy dissipation spacer comprising a body, wherein a cavity is formed inside the body; an excitation coil is mounted on the inner sideof the body; a metal clamp is arranged on the outer side of the body; a first insulating layer is arranged between the excitation coil and the body for insulation; a ring barrel filled with a magnetorheological fluid is arranged in the inner ring of the excitation coil; a metal ball which can roll in the ring barrel is arranged in the ring barrel; a plurality of piezoelectric generating units areinstalled at intervals on the inner ring of the ring barrel along the circumferential direction; pressure sensors is disposed at the two ends of each piezoelectric generating unit; the piezoelectricgenerating unit is connected in series with an electric energy extraction and storage unit, a controller and the excitation coil to form a closed loop; the inner ring of each piezoelectric generatingunit is provided with a second insulating layer; and an electromagnetic particle vibration absorption body is disposed on the inner side of the second insulating layer.
Owner:SHANDONG UNIV

Self-powered magneto-rheological damping device

ActiveCN108869617AExpanded damping adjustment rangeImprove linkage efficiencySpringsNon-rotating vibration suppressionRotor magnetsBall screw
The invention discloses a self-powered type magneto-rheological damping device which comprises an outer barrel, wherein two inner barrels are fixed in the outer barrel, and the insides of the inner barrels are hollow to form damping cavities; a ball screw pair is arranged between the inner barrel, rigid rods are respectively connected to the two ends of the ball screw pair, and the two rigid rodspenetrate through the damping cavities to be connected with an inner wall of the outer barrel; a plurality of blades are fixedly arranged on the parts, in the damping cavities, of the rigid rods, theinner barrels are filled with magneto-rheological fluid, and the outsides of the inner barrels are wound by electrified coils; a movable device connected with the ball screw pair is arranged under theball screw pair, a mass block is arranged in the movable device, steel plates are arranged at the two sides of the mass block, magnets are arranged on a lateral wall of the movable device, and the steel plates are located among adjacent magnets; rotors are in interference fixed connection to the peripheries of the rigid rods, and each rotor is composed of a permanent magnet and a rotor magnet yoke; a stator core is arranged at the periphery of each rotor, a stator winding is arranged on each stator core, a stator shell is fixedly connected to the outside of each stator, and the stator shellsfixedly contact outer walls of the inner barrels.
Owner:SHANDONG UNIV

Active suspension preview control method based on camera sensor pavement information identification

The invention discloses an active suspension preview control method based on camera sensor pavement recognition. The method comprises the following steps: acquiring front pavement preview informationthrough a camera sensor; performing data processing on the front road surface preview information to obtain a front road surface unevenness value, and determining a road surface unevenness grade according to an unevenness division criterion; receiving a front road surface unevenness grade instruction, and establishing an active suspension model based on front road surface preview information; designing a multi-performance index constrained active suspension H-infinity optimal controller; and obtaining a weight value in the H-infinity optimal controller by using a multi-objective constraint optimization algorithm so as to realize performance balance of various performance indexes of the suspension. According to the method, the camera sensor is used for obtaining the road surface preview information, the H-infinity optimal control is combined, the time lag phenomenon in the active suspension damping parameter adjusting process is improved, and multi-performance index balance control overthe active suspension is achieved.
Owner:JILIN UNIV

Semi-active magneto-rheological tuned mass damper

The invention discloses a semi-active magneto-rheological tuned mass damper. The semi-active magneto-rheological tuned mass damper comprises a barrel body; a connection block is arranged in a bottom plate of the barrel body; and a working cylinder is fixed to the connection block. Separation plates are arranged in the working cylinder, and the working cylinder is divided into a center cavity, damping cavities and side cavities. The center cavity is internally provided with a mass block capable of horizontally moving in the axis direction of the axis of the working cylinder. The center of the mass block is provided with a groove and a rolling bearing, and the periphery of the mass block is connected with piston rods capable of sliding along the rolling bearing. The damping cavities are internally provided with pistons, and the pistons are fixedly connected to the piston rods. The piston rods penetrate through holes reserved in the partition plates, extend into the side cavities and areconnected with one ends of springs in the side cavities. The other ends of the springs are fixedly connected into the working cylinder. The damping cavities are filled with magneto-rheological fluid,and powered-on coils are wound around the damping cavities. The powered-on coils are connected with an induction control device inside the barrel body.
Owner:SHANDONG UNIV

Saturation intersection group multi-layer boundary iterative learning control method and device based on MFD

ActiveCN109872538AReal-time monitoring of traffic statusReduce the number of iterationsDetection of traffic movementTime lagTraffic signal
The application discloses a saturation intersection group multi-layer boundary iterative learning control method and device based on MFD. Compared with the prior art, the iteration frequency of the method provided by the application can be obviously reduced, the convergence speed is effectively improved, so that the time-lagging problem is improved; and meanwhile; the double-layer boundary controlis performed on a jam area and a transition area by utilizing a feed-forward and feedback iterative learning controller, the boundary in-out vehicle flows at the jam area and the transition area areregulated, so that various traffic signal evaluation indexes of the jam area and the transition area are obviously improved, the entire traffic running efficiency of the control region is improved, and the boundary control effect is more ideal.
Owner:GUANGDONG COMM POLYTECHNIC

Self-adaptive suspension liquid mass double-tuned damper for offshore wind turbine vibration control

The invention discloses a self-adaptive suspension liquid mass double-tuned damper for offshore wind turbine vibration control. The self-adaptive suspension liquid mass double-tuned damper comprises at least one set of self-adaptive hybrid frequency modulation translation control system, a self-adaptive active variable damping torsional vibration control system and a control system which are arranged at the maximum amplitude of a vibration mode controlled in a wind turbine tower, wherein each self-adaptive hybrid frequency modulation translation control system comprises a first-stage frequencymodulation translation control unit and a second-stage frequency modulation translation control unit, the self-adaptive active variable damping torsional vibration control system comprises a rotary torsional vibration control unit and a variable-damping control unit, and the control system is used for collecting the real-time vibration state of the wind turbine tower and controlling the first-stage frequency modulation translation control units, the second-stage frequency modulation translation control units, the rotary torsional vibration control unit and the variable damping control unit. The self-adaptive suspension liquid mass double-tuned damper comprises the self-adaptive hybrid frequency modulation translation control system and the self-adaptive active variable damping torsional vibration control system which are used for controlling translation motion and torsional motion of the offshore wind turbine under the coupling action of wind, waves and flow.
Owner:OCEAN UNIV OF CHINA

Automatic correction system free of machine head adjustment for full-automatic cable production line

The invention discloses an automatic correction system free of machine head adjustment for a full-automatic cable production line, and belongs to the technical field of dedicated equipment for cable manufacturing. The system comprises automatic correction subsystems free of machine head adjustment, and each subsystem comprises a detection unit, a feedback unit, a control unit, and an execution mechanism. An eccentric screw is driven by a servo motor to automatically adjust the position of a die sleeve, thereby achieving the real-time adjustment of the insulating thickness in the whole production process. The system remains in a working state in the whole production process, guarantees the consistency of products, and further reduces the manual cost and machining cost while greatly improving the quality.
Owner:江苏吴通物联科技有限公司

Universal semi-active magnetorheological damping device

The invention discloses a universal semi-active magnetorheological damping device. The universal semi-active magnetorheological damping device comprises an inner cylinder, an outer cylinder and a rotary disc and is characterized in that the inner cylinder is fixed onto the rotary disc, and the inner cylinder can rotate in optional directions under the effect of the rotary disc; the rotary disc isconnected with an induction control device; a connecting block is arranged inside an inner cylinder bottom plate, and a working cylinder is fixed on the connecting block; partitions are arranged inside the working cylinder to separate the interior of the working cylinder into a central cavity and damping cavities; a mass block which can horizontally move along the axis direction of the working cylinder is arranged in the central cavity; the mass block is fixedly connected with a piston rod which can axially move along the working cavity; a piston is arranged inside each damping cavity, and thepiston rod penetrates through holes reserved in the partitions and extends into the damping cavities to be fixedly connected with the pistons; shape memory alloy springs sleeve the piston rod locatedin the working cavity, one end of each spring is fixedly connected to the mass block, and the other end of each spring is fixed to the corresponding partition; each damping cavity is filled with magnetorheological fluid, an energizing coil wind the outside of each damping cavity, and the energizing coils are connected with the induction control device.
Owner:SHANDONG UNIV

Self-powered rotary shaft vibration active control system and active control method

The invention discloses a self-powered rotary shaft vibration active control system and an active control method. In the self-powered rotary shaft vibration active control system, an inner housing isfixedly connected with a rotary shaft; a first end cover can be rotatably connected to the inner housing; a second end cover can be rotatably connected to the inner housing; the outer housing is fixedly connected to the first end cover and the second end cover; a permanent magnet is fixedly connected with the outer housing; a coil rack is fixedly mounted on the inner housing; a magnet exciting coil is wound on the coil rack, and generates relative motion with a permanent magnet to generate electric energy; an accelerated speed sensor is fixedly connected to the rotary shaft to measure a vibration signal of the rotary shaft in real time; an elastic element is fixedly connected to the rotary shaft; an actuator is fixedly connected to the elastic element, so that applied acting force acts onthe rotary shaft through the elastic element; the controller is electrically connected to the magnet exciting coil and the accelerated speed sensor; by responding to the vibration signal, the controller analyzes and processes the vibration signal to form a control signal; and by responding to the control signal, the actuator applies acting force on the rotary shaft through the elastic element to actively control radial vibration of the rotary shaft.
Owner:XI AN JIAOTONG UNIV

Image display control apparatus, method for controlling the same, and program

An image display control apparatus includes an image data supply section that supplies an image composed of a plurality of pixels arranged two-dimensionally in a matrix form as captured image data, a mask data supply section that supplies mask data for masking the image data, an imaging instruction accepting section that validates an imaging instruction acceptance signal when accepting an operation input corresponding to an imaging instruction, and a drawing section that sequentially draws the respective pixels, each having a pixel value, in the image data every predetermined period. When detecting that the imaging instruction acceptance signal is valid, the drawing section draws the pixels such that each pixel has a value including the mask data as the pixel value after the detection.
Owner:SONY CORP

Clock adjustment apparatus and method thereof

A clock adjustment apparatus delays a clock signal and adjusts a phase of the signal, thereby increasing or decreasing a delay amount of the clock signal in accordance with a phase relation between a data signal and an adjusted clock signal. The adjusted clock signal is used for receiving the data signal.
Owner:FUJITSU LTD

Clock adjustment apparatus and method thereof

A clock adjustment apparatus delays a clock signal and adjusts a phase of the signal, thereby increasing or decreasing a delay amount of the clock signal in accordance with a phase relation between a data signal and an adjusted clock signal. The adjusted clock signal is used for receiving the data signal.
Owner:FUJITSU LTD

A Semi-Active Magneto-Rheological Piezoelectric Feed Damper

The invention discloses a semi-active magnetic-current variable-piezoelectric feedback type damper, comprising an inner tube and an outer tube. A revolving shaft is arranged in the middle of the innertube, and is fixedly connected with two vanes which are arranged by the angle of 180 degrees in the inner tube. The vanes are hollow and provided with mass blocks inside respectively, the upper and lower ends of each mass block are connected with the inner wall of the corresponding vane through springs. Two thin plates are arranged in the inner tubes and perpendicular to the vanes respectively. The cavity of the inner tube is filled with magnetorheological fluid. Piezoelectric generator units are respectively arranged on the surfaces of the thin plates, and pressure sensors are respectively arranged at the tops of the piezoelectric generator units. The outer wall of the inner tube is wound with a field coil along the axis direction. The pressure sensors, the field coil, a controller and an electric power extracting and storing unit are in series connection to form a closed loop, wherein the controller and the electric power extracting and storing unit are arranged at the top of the inner tube.
Owner:SHANDONG UNIV

Analog storage battery direct-current power supply

The invention provides an analog storage battery direct-current power supply, which comprises a power supply converter, a main loop current detection device, a feed load controller and a feed load. The feed load controller regulates the feed load according to feedback voltage and comprises a signal amplification circuit, a signal processing circuit and a signal output drive circuit which are connected in turn; the signal amplification circuit is used for shaping and amplifying a signal output by the main loop current detection device; the signal processing circuit consists of a plurality of light beam drivers which are connected in series; and the output port of each light beam driver is connected with the feed load through the signal output drive circuit. A hardware drive electronic load system improved by an analog storage battery is controlled by hardware, has reaction speed higher than that of the system controlled by software, and effectively improves time lag caused by feedback in software control, so the response speed of an electronic load is increased, the requirement on the work capacity of switching devices such as an insulated gate bipolar transistor (IGBT) and the like is reduced, and the service life of equipment is prolonged.
Owner:北京品今资本管理股份有限公司

Self-powered shaft vibration active control system and active control method

The invention discloses a self-powered rotary shaft vibration active control system and an active control method. In the self-powered rotary shaft vibration active control system, an inner housing isfixedly connected with a rotary shaft; a first end cover can be rotatably connected to the inner housing; a second end cover can be rotatably connected to the inner housing; the outer housing is fixedly connected to the first end cover and the second end cover; a permanent magnet is fixedly connected with the outer housing; a coil rack is fixedly mounted on the inner housing; a magnet exciting coil is wound on the coil rack, and generates relative motion with a permanent magnet to generate electric energy; an accelerated speed sensor is fixedly connected to the rotary shaft to measure a vibration signal of the rotary shaft in real time; an elastic element is fixedly connected to the rotary shaft; an actuator is fixedly connected to the elastic element, so that applied acting force acts onthe rotary shaft through the elastic element; the controller is electrically connected to the magnet exciting coil and the accelerated speed sensor; by responding to the vibration signal, the controller analyzes and processes the vibration signal to form a control signal; and by responding to the control signal, the actuator applies acting force on the rotary shaft through the elastic element to actively control radial vibration of the rotary shaft.
Owner:XI AN JIAOTONG UNIV

A semi-active magneto-rheological tuned mass damper

The invention discloses a semi-active magneto-rheological tuned mass damper. The semi-active magneto-rheological tuned mass damper comprises a barrel body; a connection block is arranged in a bottom plate of the barrel body; and a working cylinder is fixed to the connection block. Separation plates are arranged in the working cylinder, and the working cylinder is divided into a center cavity, damping cavities and side cavities. The center cavity is internally provided with a mass block capable of horizontally moving in the axis direction of the axis of the working cylinder. The center of the mass block is provided with a groove and a rolling bearing, and the periphery of the mass block is connected with piston rods capable of sliding along the rolling bearing. The damping cavities are internally provided with pistons, and the pistons are fixedly connected to the piston rods. The piston rods penetrate through holes reserved in the partition plates, extend into the side cavities and areconnected with one ends of springs in the side cavities. The other ends of the springs are fixedly connected into the working cylinder. The damping cavities are filled with magneto-rheological fluid,and powered-on coils are wound around the damping cavities. The powered-on coils are connected with an induction control device inside the barrel body.
Owner:SHANDONG UNIV

Adaptive suspended liquid mass dual-tuned damper for vibration control of offshore wind turbines

The invention discloses an adaptive suspended liquid mass double-tuned damper for vibration control of an offshore fan, which includes at least one group of adaptive hybrid frequency modulation and translational control systems arranged at the maximum amplitude of the controlled vibration type inside the fan tower, an automatic Adapt to the active variable damping torsional vibration control system and control system; the self-adaptive hybrid frequency modulation translational control system includes a primary frequency modulation translational control unit and a secondary frequency modulation translational control unit; the adaptive active variable damping torsional vibration control system includes rotational torsional vibration Control unit and variable damping control unit; the control system is used to collect the real-time vibration state of the fan tower, and control the first-level frequency modulation and translation control unit, the second-level frequency modulation and translation control unit, the rotation torsional vibration control unit and the variable damping control unit. unit is controlled. The invention includes an adaptive hybrid frequency modulation translational control system and an adaptive active variable damping torsional vibration control system, respectively controlling the translational motion and torsional motion of the offshore wind turbine under the coupled action of wind, wave and flow.
Owner:OCEAN UNIV OF CHINA

Adaptive active-passive hybrid tuned mass damper for vibration control of offshore wind turbines

The invention discloses an adaptive active-passive hybrid tuning mass damper for offshore wind turbine vibration control, which includes at least one set of adaptive variable damping passive control systems arranged at the maximum amplitude of the controlled vibration type inside the wind turbine tower, and an adaptive variable damping passive control system. The direction changing active control system and the control system; the adaptive variable damping passive control system includes a reciprocating motion unit and a variable damping unit. The corresponding vibration control system can be activated according to the different vibration levels of the fan tower. Among them, the adaptive variable damping passive control system can use the instantaneous rheological characteristics of the magnetorheological damping fluid to instantly adjust the flow state of the magnetorheological damping fluid and consume it in time. The vibration energy of the fan improves the time-lag problem of the traditional vibration control device and ensures the safe operation of the fan; the self-adaptive variable-direction active control system can instantly adjust the direction of the output control force through the electric-driven rolling bearing, and the control reliability is high and the effect is high. it is good.
Owner:OCEAN UNIV OF CHINA

Method and device for multi-layer boundary iterative learning control of saturated intersection group based on mfd

This application discloses a MFD-based multi-layer boundary iterative learning control method and device for saturated intersection groups. Compared with the prior art, the method provided by this application can significantly reduce the number of iterations, effectively improve the convergence speed, and make the time At the same time, the feed-forward feedback iterative learning controller is used to control the double-layer boundary of the congestion area and the transition area, and the traffic flow in and out of the congestion area and the transition area is adjusted, so that the traffic in the congestion area and the transition area The signal evaluation indicators have been significantly improved, improving the overall traffic operation efficiency in the control area, and the border control effect is more ideal.
Owner:GUANGDONG COMM POLYTECHNIC

A universal semi-active magneto-rheological vibration damping device

The invention discloses a universal semi-active magnetorheological damping device. The universal semi-active magnetorheological damping device comprises an inner cylinder, an outer cylinder and a rotary disc and is characterized in that the inner cylinder is fixed onto the rotary disc, and the inner cylinder can rotate in optional directions under the effect of the rotary disc; the rotary disc isconnected with an induction control device; a connecting block is arranged inside an inner cylinder bottom plate, and a working cylinder is fixed on the connecting block; partitions are arranged inside the working cylinder to separate the interior of the working cylinder into a central cavity and damping cavities; a mass block which can horizontally move along the axis direction of the working cylinder is arranged in the central cavity; the mass block is fixedly connected with a piston rod which can axially move along the working cavity; a piston is arranged inside each damping cavity, and thepiston rod penetrates through holes reserved in the partitions and extends into the damping cavities to be fixedly connected with the pistons; shape memory alloy springs sleeve the piston rod locatedin the working cavity, one end of each spring is fixedly connected to the mass block, and the other end of each spring is fixed to the corresponding partition; each damping cavity is filled with magnetorheological fluid, an energizing coil wind the outside of each damping cavity, and the energizing coils are connected with the induction control device.
Owner:SHANDONG UNIV

Analog storage battery direct-current power supply

The invention provides an analog storage battery direct-current power supply, which comprises a power supply converter, a main loop current detection device, a feed load controller and a feed load. The feed load controller regulates the feed load according to feedback voltage and comprises a signal amplification circuit, a signal processing circuit and a signal output drive circuit which are connected in turn; the signal amplification circuit is used for shaping and amplifying a signal output by the main loop current detection device; the signal processing circuit consists of a plurality of light beam drivers which are connected in series; and the output port of each light beam driver is connected with the feed load through the signal output drive circuit. A hardware drive electronic loadsystem improved by an analog storage battery is controlled by hardware, has reaction speed higher than that of the system controlled by software, and effectively improves time lag caused by feedback in software control, so the response speed of an electronic load is increased, the requirement on the work capacity of switching devices such as an insulated gate bipolar transistor (IGBT) and the like is reduced, and the service life of equipment is prolonged.
Owner:北京品今资本管理股份有限公司

A Semi-Active Magneto-Rheological Intelligent Tuning and Damping Device

The invention discloses a semi-active magneto-rheological intelligent tuning damping device. The device comprises a cylinder body, wherein a mass block is arranged in the center of the cylinder body,work cylinders are arranged in the left, rear, left and right directions in the cylinder body respectively, and the mass block is connected with the front and rear work cylinders or the left and rightwork cylinder through rigid rods respectively; each work cylinder is divided into three independent cavities by partition plates, wherein the middle cavity is a damping cavity, and the cavities at the two sides are side cavities; the side cavities are internally provided with springs connecting the corresponding work cylinder the corresponding partition plates, each damping cavity is filled witha magneto-rheological liquid, each damping cavity is internally provided with a piston, the two ends of each piston are connected with piston rods respectively, each piston rod penetrates through thecorresponding side cavity and is connected with a sliding block, and the two adjacent piston rods of the corresponding adjacent work cylinders are connected with a same sliding block; the sliding blocks are arranged on sliding rails; an energized coil winds each piston, and each energized coil is connected to an induction control device.
Owner:SHANDONG UNIV

A self-powered magneto-rheological vibration damping device

ActiveCN108869617BExpanded damping adjustment rangeImprove linkage efficiencySpringsNon-rotating vibration suppressionRotor magnetsBall screw
The invention discloses a self-powered type magneto-rheological damping device which comprises an outer barrel, wherein two inner barrels are fixed in the outer barrel, and the insides of the inner barrels are hollow to form damping cavities; a ball screw pair is arranged between the inner barrel, rigid rods are respectively connected to the two ends of the ball screw pair, and the two rigid rodspenetrate through the damping cavities to be connected with an inner wall of the outer barrel; a plurality of blades are fixedly arranged on the parts, in the damping cavities, of the rigid rods, theinner barrels are filled with magneto-rheological fluid, and the outsides of the inner barrels are wound by electrified coils; a movable device connected with the ball screw pair is arranged under theball screw pair, a mass block is arranged in the movable device, steel plates are arranged at the two sides of the mass block, magnets are arranged on a lateral wall of the movable device, and the steel plates are located among adjacent magnets; rotors are in interference fixed connection to the peripheries of the rigid rods, and each rotor is composed of a permanent magnet and a rotor magnet yoke; a stator core is arranged at the periphery of each rotor, a stator winding is arranged on each stator core, a stator shell is fixedly connected to the outside of each stator, and the stator shellsfixedly contact outer walls of the inner barrels.
Owner:SHANDONG UNIV

An energy-feeding composite anti-galling energy-dissipating spacer bar

The invention discloses an energy-feed composite anti-galloping energy dissipation spacer comprising a body, wherein a cavity is formed inside the body; an excitation coil is mounted on the inner sideof the body; a metal clamp is arranged on the outer side of the body; a first insulating layer is arranged between the excitation coil and the body for insulation; a ring barrel filled with a magnetorheological fluid is arranged in the inner ring of the excitation coil; a metal ball which can roll in the ring barrel is arranged in the ring barrel; a plurality of piezoelectric generating units areinstalled at intervals on the inner ring of the ring barrel along the circumferential direction; pressure sensors is disposed at the two ends of each piezoelectric generating unit; the piezoelectricgenerating unit is connected in series with an electric energy extraction and storage unit, a controller and the excitation coil to form a closed loop; the inner ring of each piezoelectric generatingunit is provided with a second insulating layer; and an electromagnetic particle vibration absorption body is disposed on the inner side of the second insulating layer.
Owner:SHANDONG UNIV

Logging while drilling reservoir evaluation method, model establishing method and device, and electronic device

The invention relates to a logging while drilling reservoir evaluation method, a model establishing method and device, and an electronic device, and belongs to the technical field of reservoir evaluation. The evaluation method comprises the following steps of obtaining element logging data in a drilling process; calculating a brittleness index, a deposition environment and physical property parameters according to the element logging data; performing normalization processing on the brittleness index and the deposition environment separately; and according to the physical property parameters, apre-established three-parameter reservoir evaluation model and a normalized brittleness index and the deposition environment, obtaining a reservoir evaluation result while drilling. According to themethod, the element logging data in the drilling process are obtained, on such basis, the brittleness index, the deposition environment and the physical property parameters are calculated, then the brittleness index and the deposition environment are subjected to normalization processing, and finally, three parameters (the brittleness index, the deposition environment and the physical property parameters) established in advance are combined with the three-parameter reservoir evaluation model of a reservoir evaluation conclusion for processing, so that the reservoir evaluation result while drilling can be quickly and accurately obtained.
Owner:YANGTZE UNIVERSITY

A semi-active porous self-powered multi-dimensional shock absorber

The invention discloses a semi-active porous self-powered multi-dimensional shock absorber. The semi-active porous self-powered multi-dimensional shock absorber comprises two spherical cavities insideand outside, the two cavities are connected through spring devices, and the inner cavity and the outer cavity are filled with porous material. The inner spherical cavity is hollow, and a spherical liquid container is arranged in the center of the inner spherical cavity. A certain number of mass balls are arranged inside the inner cavity; the spherical liquid container in the center of the inner cavity is connected with the wall of the inner cavity through cylindrical channels; damping channels are arranged in the cylindrical channels, and the damping channels are externally wound with magnetexciting coils; and a piezoelectric power generating unit is arranged on the inner side wall of the inner cavity, and the piezoelectric power generating unit is connected in series with a controller and an electric energy extraction and storage unit to form a closed loop, and the controller and the electric energy extraction and storage unit are fixed to the outer wall of the cylindrical channels.The eight spring device, the eight cylindrical channels and eight piezoelectric power generating devices in vertical planes are evenly distributed. The vertical planes rotate around the central axisof a sphere, and the eight vertical planes are evenly distributed within 360 degrees of the horizontal plane.
Owner:SHANDONG UNIV
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