45results about How to "Increase damping" patented technology

The invention discloses an immersive cinema dynamic content adaptation control method based on multi-modal fusion, and the method comprises the steps: collecting at least one non-contact physiological signal of a target audience seat area in real time, the physiological signal comprising a respiratory wave signal collected by a millimeter wave radar or a photoplethysmography signal collected by a near-infrared photoelectric sensor; performing time-frequency analysis on the physiological signal, and extracting a physiological wake-up characterization value in a current time window; the physiological wake-up characterization value comprises a heart rate variability change rate and a heart rate deviation value; constructing a dynamic damping adjustment model, and calculating a virtual damping coefficient of the seat movement system at the current moment based on the physiological wake-up characterization value; and the virtual damping coefficient is converted into an execution instruction of a seat motion controller, and damping force output of the motion platform is adjusted in real time. The technical problem that the pre-programmed motion feedback is disjointed with the real-time physiological and psychological state of the audience can be solved, the experience adaptability and comfort of the cinema seat are improved, and the system safety is improved.

This invention provides a rotating shaft assembly, comprising a base, a first rotating mechanism, a second rotating mechanism, and a damping mechanism. The first rotating mechanism is rotatably connected to one side of the base; the second rotating mechanism is rotatably connected to the opposite side of the base. The damping mechanism includes a stop member slidably connected to the base and a first elastic member. The first rotating mechanism and the stop member are rotatably connected via a first arcuate rail and a first arcuate groove. The second rotating mechanism and the stop member are rotatably connected via a second arcuate rail and a second arcuate groove. The axis of the first arcuate groove is parallel to the axis of the second arcuate groove. The first elastic member has a pre-elastic force that causes the stop member to abut against the first rotating mechanism and / or the second rotating mechanism. This invention also provides a folding housing and an electronic device.

The utility model relates to a transverse impedance multidirectional damping steel spring device which comprises a spring outer sleeve (1), a steel spring (5) and a spring inner sleeve, the spring inner sleeve comprises a spring inner sleeve cover (2) and a spring inner sleeve base (6), and a transverse impedance elastic body (3) for transverse limiting is arranged between the spring outer sleeve (1) and the spring inner sleeve base (6). Compared with the prior art, three-direction damping amplification is adopted, besides the main vibration isolation direction, the stability and vibration in the direction perpendicular to the main vibration isolation direction of the spring can be controlled, and meanwhile the problem that the spring is subjected to transverse shearing dynamic load to cause fatigue fracture and failure of the spring is solved; therefore, the transverse stability and reliability are improved, and the service life of parts is prolonged.

The utility model discloses a cable stripping device, comprising a frame, a frame, arc plates and a cutter, the frame is fixedly connected with the frame, the inner side of the frame is symmetrically provided with a plurality of arc plates, the arc plates are attached to a cable, and the cutter is slidably connected to the arc plates; the traction assembly is used for tensioning the cable; according to the utility model, cable conductors can be effectively prevented from being damaged.

The utility model provides a hinge and a refrigerator comprising the same. The hinge comprises a first hinge base, a second hinge base, a transmission assembly and an electromagnetic damper, the first hinge base is used for being installed on the box body, the second hinge base is used for being installed on the door body, the transmission assembly is connected between the first hinge base and the second hinge base in a hinged mode, and the transmission assembly comprises a first transmission rod, a second transmission rod, a third transmission rod and a fourth transmission rod; an electromagnetic damper is arranged on at least one of hinge points of the hinge; and the power supply is electrically connected with the electromagnetic damper, and the magnitude of current introduced into the electromagnetic damper can be adjusted. According to the hinge, the damping performance can be kept in a better state, and the current introduced into the electromagnetic damper can be adjusted, so that the damping performance of the electromagnetic damper can be adjusted, the use flexibility is better, and the hinge can better adapt to the intelligent requirement.

The application discloses a kind of high protein yoghourt production energy-saving cooling device, belong to yoghourt production equipment technical field.Device includes conveying pipe, cooling cavity, vibration cavity, cooling cavity is sleeved in the outside of conveying pipe, and the outer wall of conveying pipe is equipped with circumferential array spiral groove, spiral vibration cavity is embedded in groove, and cavity body two ends are respectively communicated with air inlet pipe and air outlet pipe.Cooling cavity is equipped with coiled cooling pipe inside, and cooling pipe is positioned by fixed ring, and it is constituted stable damping structure by collocating support plate and shock absorber, and fixed ring is equipped with rubber ring with array through hole between conveying pipe, can improve damping effect.Vibration cavity inside is connected in series with multiple groups of vibration body with eccentric flywheel, can generate high-frequency micro-vibration, continuously disturb viscous yoghourt, avoid material adhesion and block pipe.The present application relies on spiral flow guide and vibration disturbance structure, solve the problem that high protein yoghourt is not uniformly cooled, is easy to accumulate and coagulate, effectively improve the efficiency of heat exchange, reduce production energy consumption, equipment runs stably, adapts continuous production, effectively guarantee yoghourt quality.

A mobile device stylus includes a coupling portion couplable to a face of a mobile device, a support portion connected to a portion of the coupling portion, and a contact portion to contact a screen of the mobile device to operate the mobile device, an end of the contact portion connected to the coupling portion, wherein the coupling portion is a ring structure, a non-circular ring structure, or a non-enclosed ring structure.

The application discloses a wind power blade liquid damper, a prefabrication method and a wind power blade. The liquid damper comprises an elongated pipe and damping liquid. The elongated pipe is arranged in parallel on the SS inner surface and the PS inner surface of the wind power blade at a preset interval, is located at the wind power blade tip, is arranged along the airfoil contour line of the wind power blade, and is connected to the leading edge and the trailing edge of the wind power blade at two ends. The central axis of each elongated pipe is perpendicular to the pitch shaft of the wind power blade. The damping liquid is filled in the elongated pipe at a preset volume filling rate, so that the damping liquid is constrained in the elongated pipe and flows back and forth along the airfoil contour line of the wind power blade. The centrifugal force direction of the blade is always perpendicular to the movement track of the damping liquid. The liquid turbulent flow is generated by bending the elongated pipe to absorb vibration energy, the first-order pendulum vibration of the wind power blade can be effectively inhibited, and the liquid damper can meet the maintenance-free characteristic requirement in the service life.

The application discloses a design method of a virtual additional stability controller of a phase-locked synchronization type grid-connected VSC and belongs to the technical field of phase-locked synchronization, comprising the following steps: designing a stability controller composed of a direct-current isolation link, a lead-lag and a proportional coefficient, defining an angle of operation as an included angle of an output current and an equivalent current of a power grid, taking the angle of operation as an input of the stability controller and taking an additional q-axis voltage of a grid-connected point as an output, establishing a Heffron-Philips model based on the defined angle of operation to obtain a feedback branch transfer function from the angle of operation to power, calculating a lag angle caused by the feedback branch transfer function from the angle of operation to power according to a sub-synchronous oscillation frequency of the phase-locked synchronization type grid-connected VSC, realizing compensation of negative damping caused by the lag angle of the negative feedback branch, thereby improving damping of the phase-locked synchronization type grid-connected VSC and enhancing synchronization stability of the phase-locked synchronization type grid-connected VSC, and thus solving the technical problem that the existing phase-locked synchronization type grid-connected VSC has low synchronization stability and is prone to sub-synchronous oscillation.

The application discloses a kind of based on sea condition multimodal perception's offshore dynamic docking sealing method, obtains propagation path parameter and calculates initial fluctuation index, obtains the deviation value sequence corresponding to path fluctuation;Get the corrected attitude vector;By weighted fusion method, reduce the credibility weight of corresponding direction data, and recalculate overall credibility distribution;Determine the optimized attitude vector;Judge whether path fluctuation is stable, if unstable then iteration updates deviation value sequence;Get final position attitude calculation result, for the correction of docking position deviation, output accurate docking instruction sequence.The application enhances the buffering and absorption capacity of equipment to external impact, prevents rigid collision and sealing failure caused by sudden surge or flow field pulsation, improves the safety, flexibility and sealing reliability of offshore dynamic docking.

This invention discloses a method and apparatus for determining the optimal position of the shaft damping controller in a grid-type doubly-fed induction generator (DFIG). A damping controller based on rotational speed signals is added to different control loops. The differences in shaft damping caused by adding the damping controller to different control loops are compared based on the root locus diagram of the DFIG. Results show that implementing the damping controller in the active power loop reduces transmission system damping compared to the voltage loop. Furthermore, applying the damping controller to the q-axis voltage provides a better damping enhancement effect than applying it to the d-axis voltage.

This invention discloses a double-layer clamp for aircraft piping with nonlinear vibration reduction function. The device includes an inner clamp, an outer clamp, clamp gaskets, fastening bolts, and fastening nuts. A certain constraint gap exists between the inner and outer clamps. Both the inner and outer clamps are assembled to the aircraft body using fastening bolts and nuts. The inner clamp consists of an inner clamp metal band and an inner clamp bushing; the outer clamp also consists of an outer clamp metal band and an outer clamp bushing. Both the inner and outer clamp bushings are made of nitrile rubber-organic small molecule hybrid composite material, exhibiting excellent damping performance. This invention utilizes the outer clamp to provide nonlinear constraint stiffness and nonlinear constraint damping to achieve nonlinear vibration reduction, enabling wide-frequency vibration reduction and effectively improving the vibration reduction performance of traditional single-layer clamps. This device is easy to manufacture and install, employs a nonlinear passive vibration control strategy, and achieves high efficiency at low cost.

This utility model discloses a sliding quick positioning assembly for metal guide rails, relating to the field of guide rail technology. It includes a guide rail body with a positioning mechanism. The positioning mechanism comprises a mounting frame, several cylinders, a push plate, several moving frames, a fixing pad, several moving cylinders, a moving column, and a support plate. The mounting frame is fixed to the bottom of both sides of the guide rail body. Several cylinders are fixedly mounted on one side of the mounting frame, with the cylinder output ends extending into the mounting frame. The push plate is fixedly mounted on the corresponding cylinder output end. In the technical solution provided by this utility model, by setting the positioning mechanism, the cylinders control the push plate to move laterally. The push plate supports the support plate, causing the moving frames and the fixing pads on them to move upwards. When the slider on the guide rail body is positioned, the fixing pads support the bottom of the slider, increasing damping, reducing the small displacement of the slider due to vibration, reducing the reverse rebound of the slider, shortening the stabilization time, and making the slider positioning faster and more stable.

The invention relates to the technical field of generator excitation simulation, and discloses an RT-LAB-based generator excitation small signal semi-physical simulation method and detection system, and the simulation method comprises the following steps: building a single machine infinite bus simulation system and a generator excitation system model in RT-LAB software; a semi-physical simulation platform loaded with RT-LAB software is electrically connected with the AVR excitation regulator through a conversion card; based on the generator excitation system model established in RT-LAB software, determining the optimal working parameters of the PSS of the AVR excitation regulator; and based on the optimal working parameters of the PSS of the AVR excitation regulator, adjusting the control parameters of the single-machine infinite-bus simulation system and the generator excitation system model so as to evaluate the response performance of the AVR to various generator faults. According to the method, a small signal model is built through RT-LAB, and the test accuracy is ensured by utilizing the real-time capability of the step length of 15 microseconds.

The application discloses a stamping equipment with a knife edge wear prevention function, and relates to the technical field of stamping machine tools.The stamping equipment comprises a feeding machine, an electric control cabinet, a punch mechanism and a bottom die mechanism, the feeding machine, the electric control cabinet and the punch mechanism are fixedly connected with the bottom die mechanism, and the electric control cabinet is connected with the punch mechanism through electric signals.The punch mechanism comprises a driving mechanism, an assembling frame and a cutter mechanism, the driving mechanism comprises a sliding block, the cutter mechanism comprises a base plate, and the assembling frame is fixedly connected with the sliding block and the base plate.The application realizes rapid approach of a stamping cutter to materials, improves stamping efficiency, stamps materials at a low speed, reduces instantaneous impact force on a knife edge, reduces micro-chipping, performs cyclic liquid cooling on the cutter, effectively controls the working temperature of the knife edge, prevents hardness reduction and thermal fatigue wear caused by excessively high temperature rise, forms a lubricating oil film between the knife edge and metal sheet raw materials, slows down the rigid collision between the knife edge and the metal sheet, and reduces knife edge wear.

The application discloses a constant voltage-to-frequency ratio control method and device, equipment and a medium, and relates to the technical field of asynchronous motors. The method comprises the following steps: sampling three-phase currents of the motor, obtaining a voltage orientation angle by integrating a given frequency, and transforming the currents to a two-phase rotating coordinate system by using the voltage orientation angle to decouple active current feedback components and reactive current feedback components; after generating a total voltage given value according to a constant voltage-to-frequency ratio, establishing a voltage closed-loop control loop to output a reactive current instruction; establishing a reactive current closed-loop control loop to output a quadrature-axis voltage given value; deducting the quadrature-axis voltage given value from the total voltage given value to obtain a direct-axis voltage given value; synthesizing a space voltage vector based on the direct-axis voltage given value and the quadrature-axis voltage given value, and feeding back the amplitude of the space voltage vector to the voltage closed loop. The application effectively suppresses low-frequency oscillation and improves the output voltage precision while maintaining a simple structure through double closed-loop control of the voltage and the reactive current.

This utility model belongs to the field of display screen technology and discloses a computer display screen with an anti-shake structure. The display screen includes a support component on its back. Each end of the support component is movably connected to a connecting component. The bottom of the display screen is placed on a table via a dedicated bracket. The lower end of the support component is firmly attached to the table via the connecting components, and the upper end of the support component is firmly attached to the upper end of the back of the display screen via another connecting component. Due to the support component, with the cooperation of the connecting components, it can be connected between the display screen and the table. Furthermore, with the cooperation of the adjusting plug and the connecting cavity, the length of the support component remains stable under the connection of the display screen. This ensures that when the display screen is impacted, it receives cushioning without continuous high-frequency vibration, effectively reducing the shaking intensity of the display screen.

The utility model discloses a radial gas foil bearing capable of independently adjusting circumferential four-direction air gaps. The radial gas foil bearing structurally comprises a bearing sleeve, an air gap adjusting screw rod, a locking screw, a wedge-shaped push block, a supporting tile, a bump foil and a flat foil. The air gap adjusting screw drives the wedge-shaped push block to move axially, so that the position of the supporting tile is adjusted, the bump foil is pushed to be compressed or released, and accurate adjustment of the air gap is achieved; each air gap adjusting screw can independently control the corresponding push block, independent adjustment of air gaps in four directions is ensured, and high precision and flexibility are provided. According to the bearing structure, independent adjustment is achieved through an air gap adjusting mechanism formed by four sets of air gap adjusting screws, wedge-shaped push blocks, supporting tiles and bump foils, the performance of the bearing is optimized, load changes and air film rigidity are adapted, the stability and efficiency of a rotor system are improved, and the bearing structure adapts to various complex working conditions.

The invention relates to the technical field of water-based damping materials, and discloses a low-expansibility water-based damping material and a preparation method thereof.The low-expansibility water-based damping material is prepared from, by mass, 40-60 parts of water-based polyurethane-acrylate resin, 20-30 parts of water-based polyurethane-acrylate resin, 20-30 parts of water-based polyurethane-acrylate resin, 20-30 parts of water-based polyurethane-acrylate resin, 20- 10 to 20 parts of a silane coupling agent; 30-60 parts of a damping filler; 5-10 parts of a dispersant; 3-10 parts of a film forming agent; 0.3 to 1 part of a defoaming agent; and 0.5-3 parts of a thickening agent. The damping characteristic of the WPUA resin is organically combined with the interface enhancement and network crosslinking functions of the silane coupling agent, and the comprehensive high-performance water-based damping material with low expansion, high stability, strong adhesion and corrosion resistance is successfully prepared.

The application relates to a boron-containing resin type wide-temperature-range damping additive and a preparation method and application thereof, and belongs to the technical field of organic silicon damping materials. The boron-containing resin type wide-temperature-range damping additive comprises: A) an organic silicon resin matrix with a three-dimensional network structure; B) a boron-containing functional structure connected with the organic silicon resin matrix; and C) an aryl-containing functional structure connected with the organic silicon resin matrix. The boron-containing functional structure is connected to the surface of the three-dimensional network structure of the organic silicon resin matrix through a Si-O-B bond; the aryl-containing functional structure is located on the surface of the three-dimensional network structure of the organic silicon resin matrix; the molecular weight of the organic silicon resin matrix is 1000-10000; and the organic silicon resin matrix is selected from one or more of MQ resin, MT resin, MTQ resin, MDT resin and POSS silicon resin. The application improves the high-temperature dissipation capacity and wide-temperature-range damping performance of the damping material through the synergistic effect of the rigid silicon resin and the surface boron-containing dynamic structure, and takes into account the compatibility and mechanical stability.

The application provides a shock absorber cumulative risk monitoring and adaptive adjustment method, comprising: performing simulation calculation consistent with actual road test requirements to obtain result data; obtaining front and rear axle equivalent speeds according to the result data; matching the front and rear axle equivalent speeds with preset shock absorber characteristic speed nodes, calculating a fusion weight mapped to a corresponding speed node at each simulation step; defining a risk factor, calculating a dimensionless exceeding proportion of each risk factor at each simulation step; calculating a risk value according to the fusion weight and the dimensionless exceeding proportion, and accumulating risk values corresponding to each speed node at all simulation times; setting a reference damping force amplification multiple and a change range, determining an adjustment coefficient of each speed node based on the accumulated risk, mapping the adjustment coefficient to a damping force of a corresponding speed node of an original shock absorber characteristic by using proportional control, and obtaining an optimized front and rear shock absorber characteristic.

The invention discloses a method for operating a controller, a computer program product, a controller and a motor vehicle comprising the controller. The invention relates to a method for operating a controller (10) for closed-loop control of a controlled system (8), comprising the following steps: (S100) introducing a variable value that affects a frequency response of the controlled system (8); (S200) determining transformation factors (alpha, beta, gamma) according to the imported variable values; and (S300) performing commissioning of the controller (10) for the modified frequency response of the controlled system (8) using the determined transformation factor (alpha, beta, gamma).

This invention discloses an additive manufacturing-based inertial amplification nonlinear low-frequency vibration isolation metamaterial structure, vibration isolation device, and its performance control method. The vibration isolation metamaterial structure includes a rhombic frame structure, an inertial amplification unit, and a square spring structure. The square spring structure is arranged within the rhombic frame structure, with its two ends connected to a pair of opposite corners of the rhombic frame structure. The elastic extension direction of the square spring structure is parallel to the diagonal of this pair of opposite corners of the rhombic frame structure. The inertial amplification unit has a centrally symmetrical structure, including a rigid rod, two counterweights, and two diagonal rods. The center of symmetry of the inertial amplification unit, the center of the rhombic frame structure, and the center of the square spring structure all coincide in projection. Therefore, the vibration isolation metamaterial structure of this invention significantly widens the bandgap range and enhances low-frequency vibration isolation performance, exhibiting excellent performance in suppressing longitudinal waves in the 0-1000Hz low-frequency range, increasing vibration damping, and energy absorption.

The invention relates to a polyacrylate coating, a preparation method thereof, a battery and an electric device. The polyacrylate coating is prepared from the following raw material components in parts by weight: 40 to 70 parts of acrylate copolymer emulsion, 10 to 25 parts of flame-retardant filler, 0.5 to 5 parts of adhesion promoter and 10 to 45 parts of water, the acrylate copolymer emulsion is prepared by emulsion copolymerization of an acrylate monomer, an alkyl ester monomer, a nitrogen-containing monomer and a phosphorus-containing monomer in the presence of an initiator, and an emulsifier adopted in emulsion copolymerization comprises a phosphorus-containing anionic emulsifier and a nitrogen-containing nonionic emulsifier; the chain length of alkyl in the alkyl ester monomer is C10-C18. The polyacrylate coating has good damping and flame retardant properties.

The invention relates to a lightweight composite material anti-collision beam and a preparation method thereof. Comprising the following steps that a cavity of a composite material anti-collision beam shell is partially filled with foam materials or completely filled with the foam materials with different densities, a filling layer with density changes is formed in the composite material anti-collision beam shell, the foam materials are cured, and the lightweight composite material anti-collision beam is obtained. According to the preparation method of the lightweight composite material anti-collision beam, pseudo-plastic failure energy absorption of the composite material anti-collision beam is realized, so that the technical problems that an existing composite material anti-collision beam is prone to layering and tearing after collision and cannot fully absorb collision energy, and then brittle fracture of the anti-collision beam is caused are solved.

A frictionless balancing cylinder combining surface throttling and slit throttling, and its operating method, are disclosed. The cylinder comprises a front cover, a piston rod, a cylinder body, a piston, and a rear cover. The piston includes an inner piston and an outer piston, with the inner piston nested within the outer piston. The other end of the piston rod is fixed to the inner piston. The outer piston slides in contact with the inner surface of the cylinder body. An axial air supply channel is provided on the end face of the inner piston adjacent to the rear cover. An inner annular groove matching the air supply hole is formed on the inner side of the outer piston. An arc-shaped slit channel is formed on the outer side of the outer piston, located at the bottom of the inner annular groove and communicating with it. An air release groove is formed on the outer side of the outer piston, with an air release hole at the bottom. An annular boss is provided on the outer surface of the outer piston near the air release groove. This invention combines the advantages of surface throttling and slit throttling in high-precision shaft systems, meeting the requirements for high-precision and smooth movement of the vertical axis in ultra-precision machine tools.

The utility model relates to bridge damping technical field, concretely relates to a kind of anti-seismic mortise and tenon device, including mass block, and the one end of mass block along first direction is provided with damping support;Two sides of mass block along second direction are respectively provided with connecting beam;Upper mortise and tenon, upper mortise and tenon are connected to at least one side wall of mass block along third direction, and the one end of upper mortise and tenon along first direction towards damping support is provided with mortise groove;Lower mortise and tenon, the one end of lower mortise and tenon close to upper mortise and tenon is provided with tenon head, and tenon head is embedded mortise groove, and tenon head and mortise groove between filling have viscoelastic material;The one end of lower mortise and tenon away from upper mortise and tenon is used to and the bottom plate of box girder connection.The utility model can overcome the existing damping mortise and tenon device only simple concave-convex cooperation is used and is installed in box girder side or beam end, leading to upper mortise and tenon and lower mortise and tenon permanent deformation is prone to occur even structural damage, and the technical problem of low energy consumption efficiency.

The utility model provides an upper limb rehabilitation training device, include: support mechanism, gripping mechanism and damping adjusting mechanism, wherein, support mechanism includes first casing, gripping mechanism includes fixed link and two opposite setting handle of fixed link both ends, the middle part of fixed link is provided with pivot, pivot rotatory connection in first casing, with gripping mechanism can rotate relative to support mechanism, damping adjusting mechanism includes damper, movable frame and first drive part, damper is at least partial cover and set in pivot, movable frame is connected in damper far from one side of pivot, first drive part is connected in movable frame, first drive part is used for driving movable frame far from or close to pivot, with adjusting the extrusion force between damper and pivot and adjusting the damping when gripping mechanism rotates relative to support mechanism.

The invention discloses a multi-damping-buffering tire retaining wall anti-collision structure and a construction method thereof. The multi-damping-buffering tire retaining wall anti-collision structure comprises a layered energy dissipation twin tire body, a multi-stage energy dissipation connecting system, a grating and filler. A layered energy dissipation twin tire main body is of a multi-layer stacked structure, each layer is provided with a plurality of twin tires, each twin tire is formed by coaxially nesting an outer-layer mother tire and an inner-layer child tire, a closed cavity gap is formed between the mother tire and the child tire, and the cavity gap is filled with a tire gap filler to form a first-stage energy dissipation unit; the multi-stage energy dissipation connecting system penetrates through a tire hole of the double-cell tire, and the layered energy dissipation double-cell tire main body and the grating are connected into a whole; the gaps between the twin tires are filled with the filler, and a second-stage energy dissipation unit is formed through flexible deformation of the multi-stage energy dissipation connecting system and extrusion friction of the filler. The anti-collision performance is greatly improved through multi-damping synergistic energy consumption, the structural integrity is enhanced through full-flexible connection, and meanwhile efficient resource utilization of the waste tires is achieved.