112 results about "Magnetorheological fluid" patented technology

This invention provides a capacitive stylus and its usage method, belonging to the field of stylus technology. The capacitive stylus includes: a stylus shell; a pen tip installed in the lower part of the stylus shell; and an adjustment mechanism comprising a magnetorheological fluid cavity, a rotating sleeve, a guide groove, a connecting shaft, an electromagnetic coil, and a magnetic ring. Multiple guide grooves are provided, and two electromagnetic coils and two magnetic rings are provided. The magnetorheological fluid cavity is located in the upper part of the pen tip. By setting a magnetorheological fluid cavity, a rotating sleeve, and symmetrically arranged electromagnetic coils and magnetic rings within the pen tip, and utilizing the reversible viscosity change of the magnetorheological fluid under a magnetic field, stepless continuous adjustment of writing damping within the range of 10-150 mN·m is achieved. Users can freely adjust the pen tip rotation resistance according to personal preference or different writing scenarios, significantly improving the stylus's personalized adaptability and writing experience.

This invention relates to the field of energy storage technology for new energy power plants, and discloses a multi-compartment coordinated charging and discharging intelligent control device for a new energy power plant energy storage system. The device includes a container body, multiple battery clusters and a DC power control cabinet installed on its inner wall. The energy storage EMS energy management system host sends control commands to drive the drive module to synchronously energize electromagnetic coil one and electromagnetic coil two to generate a directional magnetic field. Electromagnetic coil one, in conjunction with a magnetically conductive shell, magnetizes the iron core. The iron core magnetically attracts the I-shaped armature to compress the spring one, which slides downward along the inner wall of the connecting cavity and pulls the telescopic partition to divide the upper part of the connecting cavity into independent positive and negative magnetorheological chambers that are not connected. The magnetorheological fluid in the liquid chamber flows into the corresponding chamber and, under the action of the magnetic field of electromagnetic coil two, transforms from a liquid state into a rigid solid-like state and forms a dense conductive chain, thereby forming a conductive path to ensure that the battery clusters can be independently switched on and off and coordinated across multiple compartments.

The application provides a dredging device for treating sewage in a river basin water environment, which comprises a mobile vehicle body, a suction pipe and a moving mechanism. The moving mechanism comprises a walking track, a rotating plate, a mounting plate, a containing box, a first electric push rod, a flexible sleeve, a second electric push rod, a sealing plate, a magnetorheological fluid, an electromagnetic coil and a main control unit. The mobile vehicle body moves on a shoal to perform dredging. If the shoal is relatively soft, the flexible sleeve is abutted against the top surface of the adjusting groove by the first electric push rod, the sealing plate is lifted by the second electric push rod, the magnetorheological fluid in the flexible sleeve is extruded, the magnetorheological fluid can push the flexible sleeve to deform outward, the top surface area of the flexible sleeve is increased, the electromagnetic coil is electrified, under the action of the magnetic field, the magnetorheological fluid becomes solid, the flexible sleeve can remain in a fixed form, finally, the flexible sleeve is transferred downward and contacts the shoal surface, the contact area is increased, the stability of the mobile vehicle body is ensured, the silt is sucked, and the water environment ecology is repaired.

This invention relates to the field of accelerator technology for new energy vehicles, and discloses an idle speed anti-slip elastic positioning electronic accelerator pedal assembly, including a fixed base installed in the vehicle. An electronic control unit for intelligent control is disposed on the surface of the fixed base. A rotating shaft support is fixed to the surface of the fixed base, and a pedal arm is rotatably disposed on the surface of the rotating shaft support. A foot pedal surface is fixed to the surface of the pedal arm. In use, this invention employs a "lock-off when stationary, unlock-off when moving" control logic. Through active detection of the vehicle speed signal, the viscosity of the magnetorheological fluid increases when the vehicle speed is zero, applying locking damping to the pedal arm. This physically filters out minor interferences, avoiding unexpected starting problems when the vehicle is stationary, such as accidental touch by children, sensor signal jitter, or unintentional light touch by the driver. It can restrict the pedal arm at idle or stationary speeds, achieving the purpose of preventing idle speed slippage.

This application discloses an auxiliary braking device, method, system, medium, equipment, and vehicle. The auxiliary braking device includes: a housing with a cavity formed inside; a drive shaft, connected to the wheel and at least partially disposed within the cavity; an electromagnet disposed within the cavity; and a magnetorheological fluid filling the cavity. The auxiliary braking device is configured to utilize the internal frictional adhesion force generated by the magnetorheological fluid moving within the cavity to convert the kinetic energy of the vehicle into the internal energy of the magnetorheological fluid, thereby achieving auxiliary braking. The auxiliary braking device provided by this invention achieves this by using the adsorption and release of the magnetorheological fluid under the control of a magnetic field. During normal driving, it does not affect the vehicle's power transmission; when deceleration is required, it utilizes the internal friction of the magnetorheological fluid itself to convert kinetic energy into internal energy, thus achieving an auxiliary braking effect. This device has a simple structure and is easy to operate, and can greatly protect the safety and reliability of the vehicle's main brake disc, effectively eliminating or reducing the occurrence of brake failure during long-term downhill driving or continuous deceleration.

This invention discloses an auxiliary flow channel type asymmetric magnetorheological vibration damper with large tension and small compression, comprising a cylinder, a working piston, a floating piston, and a guide assembly. The floating piston divides the interior of the cylinder into a magnetorheological fluid region and a high-pressure gas chamber region, with the working piston located within the magnetorheological fluid region. The working piston consists of an upper cover, a piston core, a piston rod, a lower end gasket, a valve plate, a spring, and a limiting block. The upper cover has a guide band and four evenly arranged through slots of different sizes on both the inner and outer sides. The piston core contains an excitation coil and four auxiliary flow channel elongated holes. The valve plate and spring are sequentially fitted onto the upper end of the piston rod and are axially limited by the limiting block. The guide assembly is installed at the end of the magnetorheological fluid region, with the piston rod passing through it. The assembly consists of a guide, a buffer block, and a guide upper cover. A lower oil seal, a sliding bearing, and an upper oil seal are sequentially arranged inside the guide. The floating piston end face is equipped with a guide band and a sealing ring, and a gas seat is provided on the high-pressure gas chamber side of the cylinder. This vibration damper can meet the asymmetric output requirements of large tension and small compression, and its reasonable structural layout reduces the overall installation difficulty.

The application discloses a multi-mode magneto-rheological actuator, which comprises a magneto-rheological damper, a working cylinder and a control cylinder which are connected in parallel, a piston is arranged in the working cylinder, so that the working cylinder is divided into a first working cavity and a second working cavity by the piston; an adjusting valve core is arranged in the control cylinder, so that the control cylinder is divided into a first control cavity and a second control cavity by the adjusting valve core; the first working cavity, the second working cavity, the first control cavity and the second control cavity are filled with magneto-rheological fluid; the first working cavity is communicated with the first control cavity, and the communication flow in the two cavities is controllable; the second working cavity is communicated with the second control cavity, and the communication flow in the two cavities is controllable; the two cavities are filled with magneto-rheological fluid; the magneto-rheological actuator has two working modes, a mode switching switch of active damping and magneto-rheological semi-active damping is formed by a motor and the adjusting valve core, and model selection is actively carried out for different scenes, so that the damping requirements of different application scenes can be met.

The utility model discloses a magnetorheological sound insulation cotton damping with anti -interference structure relates to sound insulation material technical field, including sound insulation cotton layer and anti -interference structure layer. The composite electromagnetic shielding layer of the magnetorheological sound insulation cotton damping with anti -interference structure outermost layer is alternately woven composite by nanometer copper net and graphene film, can be all -round shielding to electromagnetic interference, creates stable electromagnetic environment for the inside magnetorheological liquid filling cavity, effectively avoids the outside electromagnetic signal interference magnetorheological liquid response to the magnetic field, guarantees its rheological characteristic stable play, the three -dimensional shock attenuation layer of inner layer adopts the even arrangement of hexagonal honeycomb -like elastic rubber film and viscoelastic damping block, and is matched with interval distribution's shock attenuation spring and shock attenuation rubber block, can form multistage shock attenuation system, effectively absorbs and buffers mechanical vibration, greatly reduced the influence of outside vibration to sound insulation cotton layer and magnetorheological liquid filling cavity, has improved the reliability of product under complex vibration environment significantly.

This invention relates to a turbulence-assisted dynamic magnetic field magnetorheological polishing device and method, belonging to the field of precision and ultra-precision machining technology. The device includes a base plate, a reciprocating moving mechanism, a rotary drive system, a magnetic field adjustment system, a turbulence generating component, a fluid circulation system, and a pipe fixing component. The turbulence generating component is a spiral head fitted onto a cylindrical magnet. The reciprocating moving mechanism drives the cylindrical magnet in reciprocating linear motion, and the rotary drive system drives the cylindrical magnet to rotate, forming a dynamic magnetic field. When the spiral head rotates, it generates uniform turbulence within the flow channel of the pipe wall, simultaneously creating a localized necking inside the pipe, increasing the flow velocity and pressure of the magnetorheological fluid, and enhancing the impact energy of the abrasive particles on the wall surface. The fluid circulation system achieves closed-loop circulation and maintains the activity of the magnetorheological fluid. This invention achieves uniform distribution of the magnetorheological fluid through turbulence generated by the rotation of the spiral head, and forms a dynamic magnetic field through the combined reciprocating and rotary motion of the cylindrical magnet. The magnetic field parameters can be adjusted in real time according to the polishing process, effectively improving the efficiency and uniformity of polishing the inner wall of pipes. It is suitable for ultra-smooth polishing of the inner walls of various slender pipes and precision fluid pipes.

The utility model discloses a kind of magneto-rheological polishing assembly and magneto-rheological polishing device, it is related to the field of magneto-rheological polishing, including support plate, magnetic field generator is rotatably arranged in the support plate lower, the support plate top is fixed with liquid storage cylinder, the support plate one side is fixed with support frame, sliding seat is slidably arranged on the support frame, the sliding seat bottom end is rotatably connected with rotating shaft, the rotating shaft outside is fixed with carousel, carousel upper is provided with round cover, the round cover inner ring is fixed with second magnetic shield, when cylinder drives carousel and workpiece is inserted into liquid storage cylinder inside, carousel outside round cover will shield the top of liquid storage cylinder, avoid carousel rotation, hit magneto-rheological fluid, make magneto-rheological fluid splash, cause waste, simultaneously, the first magnetic shield of round cover inside can block the upper end of the magnetic field generated by magnetic field generator, avoid magnetic field diffusion outward, so that magnetic field only acts on the magneto-rheological fluid in liquid storage cylinder.

The application relates to the technical field of sawing equipment, and particularly discloses an automobile aluminum alloy die casting part trimming equipment which comprises an equipment shell, a saw blade, a workbench, a positioning clamp block, a guide mechanism and a detection mechanism; the workbench is installed on the surface of the equipment shell; the positioning clamp block is located above the workbench; the guide mechanism is located between the workbench and the positioning clamp block, limits the moving direction of the positioning clamp block and limits the moving speed of the positioning clamp block; and the detection mechanism is located outside the saw blade. When the saw blade cuts the die casting part gate, the detection mechanism detects the contact state of the saw blade and the die casting part; according to the contact state of the saw blade and the die casting part, the guide mechanism adjusts the limiting force on the positioning clamp block; the automobile aluminum alloy die casting part trimming equipment adjusts the pushing sliding resistance in real time according to the contact state of the saw blade and the gate through cooperation of the magnetorheological fluid and the electromagnetic coil, automatically limits the artificial pushing rhythm, and improves the cutting section quality.

This invention proposes a variable damping and variable inertia-capacity device, relating to the technical field of vibration reduction and isolation devices. The invention includes a linear motion unit and a rotary motion unit, connected by a pipeline. This invention utilizes changes in current / magnetic field to adjust the shear yield stress of the magnetorheological fluid within the rotary motion unit, thereby controlling the rotational speed of the driven component within the rotary motion unit and achieving adjustment of the inertia-capacity coefficient. When slip exists between the driving and driven components, and between the driven component and the cylinder of the rotary motion unit, damping regulated by current / magnetic field is output. Simultaneously, the linear motion unit also provides controllable damping. Through the adjustment of inertia-capacity and damping, this invention can meet the output force requirements of different vibration reduction and isolation conditions.

The application discloses a turbine flowmeter impeller rotating system and a dynamic balancing method, relates to the technical field of flow measurement, and comprises a turbine flowmeter shell, a core shaft, two flow guides and a rotating mechanism. A plurality of turbine blades are fixedly connected to the side wall of the core shaft. The flow guides are fixedly connected to the turbine flowmeter shell through a plurality of screws. The rotating mechanism comprises a static cavity formed in the flow guide. The core shaft penetrates into the static cavity at both ends. The static cavity is filled with magnetorheological fluid. A ceramic ball is fixedly connected to the inner wall of the static cavity. A tapered groove is formed in the side wall of the ceramic ball. In the application, the rotating speed of the core shaft is monitored in real time through a rotating speed sensor. The current size of a magnetic induction coil is controlled by using a PLC, the viscosity of the magnetorheological fluid is controlled, the damping force is changed, and the displacement of the core shaft in the axial and radial directions is actively inhibited. The on-demand response mechanism fundamentally solves the stability problem caused by high-speed vibration and water hammer impact.

This invention discloses a turning device for square steel used in elevator racks after rolling, belonging to the field of square steel turning technology. It aims to solve problems encountered by existing devices when machining square steel with large aspect ratios and poor rigidity, such as easy vibration in the middle section, interference from positioning and vibration coupling, low centering accuracy, and increased errors due to steel chip jamming. The device includes a turning equipment base, a machine tool guide rail base, a chatter suppression mechanism, a positioning and locking mechanism, and a flexible stabilizing mechanism. The chatter suppression mechanism slides synchronously with the tool holder adjustment table, and adaptively supports the middle section of the square steel through bimetallic strip thermal induction. A displacement sensor detects deformation in real time. The positioning and locking mechanism is linked by an electrical signal, driving the centering component to automatically center via a telescopic rod and gear rack. A metal conductive sheet contacts an electrical contact button to trigger an electromagnet, causing the magnetorheological fluid to harden and lock the ejector pin. The flexible stabilizing mechanism achieves radial stabilization through a triangular turntable and flexible support rollers, and synchronously links with an air duct to blow away steel chips. The three mechanisms work together to form a closed loop, improving machining accuracy and stability, and adapting to the large-scale machining needs of square steel for elevator racks.

This application discloses a magnetorheological extrusion mode suspension and its control method, an on-board terminal, and a vehicle. The magnetorheological extrusion mode suspension includes: a sleeve; a bracket located inside the sleeve; a hollow support member located between the sleeve and the bracket; a magnetorheological fluid located within the cavity of the hollow support member; and a coil disposed on the bracket at a position corresponding to the cavity. The normal direction of the coil extends radially along the sleeve and passes through the magnetorheological fluid. Different current intensities result in different magnetic field intensities and different yield strengths of the magnetorheological fluid; different current directions result in different magnetic field directions, different magnetic flux directions, and different damping forces of the magnetorheological fluid. Therefore, the intensity and direction of the current can be adjusted according to the excitation conditions to form magnetorheological fluids with different yield strengths and different damping forces to adapt to vibrations in a wide frequency range and achieve better vibration isolation effects across the entire frequency range.

This invention relates to a bird strike test fixture and method for composite material blades of aero-engines. The invention includes an outer spherical shell; an inner spherical shell installed within the outer shell, the inner shell having a top opening; a limiting hemisphere installed within the top opening of the inner shell; a clamping assembly including two contoured clamping blocks and a sliding rod, each contoured clamping block including a clamping end, an arcuate spherical surface, and a connecting rod; and a magnetorheological locking assembly disposed within the upper shell, including a flexible bag and excitation coils. The flexible bag is filled with magnetorheological fluid and disposed within the central cavity, and multiple excitation coils are disposed in two side cavities and distributed around the periphery of the flexible bag. This invention achieves different angular rotations of the composite material blade of an aero-engine by releasing multiple rotational degrees of freedom, thereby simulating the stress distribution and damage types of the blade under harsh operating conditions from impacts at different angles, thus improving the accuracy and reliability of the test data.

The application discloses a composite vibration isolation device based on an air spring and a magnetorheological fluid damper, which comprises a base, a load platform, a controller, an air spring composite component and a magnetorheological fluid damper arranged between the base and the load platform; the air spring composite component comprises an air spring and a mechanical spring; the air spring comprises an air bag and upper and lower sealing covers clamped on both sides of the air bag; the lower sealing cover is fixed on the base; the other end of the upper sealing cover is connected with the mechanical spring; the other end of the mechanical spring is fixed on the bottom of the load platform; the magnetorheological fluid damper is used for providing a damping value to assist the air spring composite component in vibration isolation; and the controller is used for controlling the damping value of the magnetorheological fluid damper and the air pressure value in the air bag. The application further provides a control method. The device provided by the application can efficiently, intelligently and widely isolate the vibration of a load device.

The application discloses an active isolation-passive damping-energy recovery integrated composite isolation wall, belonging to the field of rail transit, comprising a magneto-rheological damping unit, a linear motor displacement control unit, a passive vibration control module, a bottom support element, a top covering module and the like; the magneto-rheological damping unit guarantees controllable damping force of the magneto-rheological damping unit through the magneto-rheological effect of magneto-rheological fluid in a cavity, and actively controls the train track in real time; the linear motor displacement control unit accurately adjusts the system displacement, and realizes active vibration control; the passive vibration control module realizes efficient vibration energy attenuation through cooperation of various elements; the bottom support element provides bearing and stable support, and the top covering module has vibration monitoring and vibration energy conversion and protection functions. The isolation wall combines real-time adjustment of active control and energy dissipation of passive control, constructs a multi-stage vibration control strategy, adapts to different vibration environments, and improves the stability and safety of the rail system.

This utility model relates to a web-aligning device for BOPP film production, aiming to solve the technical problems of current web-aligning rollers driven by threaded rods, which not only have long response times and are prone to hysteresis errors at high speeds, but also cause local stretching of the film due to rigid impacts, resulting in wrinkles or holes. The device includes: a base with unwinding and take-up rollers mounted on both sides of its surface for unwinding and take-up of the BOPP film; and a web-aligning mechanism located on the base between the unwinding and take-up rollers. This utility model uses a monitoring component to capture the lateral deviation of the film in real time. The electromagnetic coil current can be adjusted in microseconds, causing a rapid change in the viscosity of the magnetorheological fluid in the corresponding cavity. This allows for stepless switching of the magnetorheological fluid from liquid to semi-solid state, causing the web-aligning roller to undergo adaptive deformation. When the deviation is small, the viscosity is finely adjusted to form a flexible corrective force; when the deviation is large, rigidity is increased to ensure web-aligning efficiency. Compared to traditional threaded rod mechanical transmission, this device shortens the hysteresis time and is suitable for high-speed film production scenarios.

This invention provides a variable damping magnetohydrodynamic coupler for marine generator sets and its control method, comprising a housing, an input shaft, an output shaft, an excitation assembly, a control unit, a piezoelectric element assembly, and an auxiliary sensing assembly. A damping cavity is provided within the housing. The excitation assembly includes a magnetorheological fluid, an excitation coil, and a magnetic ring. The magnetorheological fluid fills the damping cavity, and the excitation coil adjusts the magnetic field of the magnetic ring through the excitation current to control the damping torque of the magnetorheological fluid. Based on the controllable viscosity of the magnetorheological fluid, the damping torque can be continuously adjusted over a wide range of 50~500 Nm by adjusting the excitation current to change the magnetic field strength, dynamically adapting to complex operating conditions such as shipboard turbulence and sudden load changes. Combined with the micro-compensation function of the piezoelectric element assembly, the coaxiality accuracy of the shaft system is improved to ±0.002 mm, and the resonance risk caused by over-compensation under high-speed conditions is avoided through a speed correction coefficient.

This invention proposes a high-load-bearing three-column rack with adaptive load-bearing capacity adjustment and an adjustment method, relating to the field of three-column racks. The invention includes a rack assembly; a fall-prevention assembly for preventing goods from falling; an adaptive adjustment assembly for adaptive load-bearing capacity adjustment; and a support assembly for secondary support. The rack assembly includes: rack uprights; and rack beams installed inside the rack uprights. The adaptive adjustment assembly includes: a fixing member detachably installed on the side of the rack upright; and a rack beam slidably installed on the side of the fixing member. In this invention, when the weight of the goods exceeds a threshold, the adaptive adjustment assembly causes the moving and fixed contacts to close, causing the magnetorheological fluid to experience a significant viscosity increase under the influence of a magnetic field, transforming it into a near-solid state. This locks the piston rod, which forms a rigid support against the rack beam, greatly improving the load-bearing capacity. Furthermore, the magnetorheological fluid's state switching speed is much faster than traditional hydraulic supports.

This utility model discloses a horizontal monitoring device for building construction, including a stabilizing frame with adjustable support legs at its lower end. A monitoring component for horizontal monitoring is installed inside the stabilizing frame, and a counterweight is installed at the lower end of the monitoring component. The monitoring component includes a connecting pipe. In this utility model, by setting up the monitoring component and using the connecting pipe in conjunction with magnetorheological fluid, the monitoring component can be leveled by its own counterweight in a natural state. Then, by controlling the operation of the electrodes, the magnetorheological fluid is solidified, ensuring that the laser emitting component remains horizontal. In this state, the laser emitting component emits laser lines, which, in conjunction with the construction workers' operations, achieve the purpose of horizontal monitoring. Simultaneously, a wireless control module can be used during construction to remotely control the operation or stop of the electrodes, achieving automated calibration without the need for repeated adjustments by the user.

This invention relates to an intelligent anti-rotation system and control method for magnetorheological fluid in the impeller of an axial flow pump. The system includes: an impeller cavity with helical grooves and filled with magnetorheological fluid; an electromagnetic coil coaxially mounted on the outside of the impeller; sensors for monitoring pump shaft speed and motor current; and a controller for receiving signals from the speed sensor and controlling the energization of the electromagnetic coil. The impeller cavity is machined along the impeller axial direction, and the electromagnetic coil is tightly mounted on the outside of the impeller with its axis coinciding with the impeller axis to ensure uniform magnetic field action on the magnetorheological fluid inside the impeller. The speed sensor is installed at the end of the pump shaft or on the shaft body, and the current sensor is installed in the motor power supply circuit. The signal output terminals of the speed sensor and the current sensor are respectively connected to the input terminal of the controller, and the control input terminal of the electromagnetic coil is connected to the output terminal of the controller. This invention has a simplified structure, reduced cost, high reliability, extremely fast response speed, and excellent control performance.

Provided is a permanent magnet type magnetorheological fluid deceleration device based on magnetorheological polishing, comprising a magnetically conductive shell (1), a magnetorheological fluid conveying pipe (2), a fixed block (3) and a deceleration permanent magnet (4); the magnetically conductive shell (1) is a hollow cavity, and the upper and lower end faces have holes for connecting and fixing the fixed block (3) at corresponding positions; the fixed block (3) is a hollow tubular structure, and the two ends are connected to the top and bottom of the magnetically conductive shell (1) respectively; the magnetorheological fluid conveying pipe (2) is arranged in the fixed block (3) and penetrates the holes at the two ends of the magnetically conductive shell (1); the deceleration permanent magnet (4) comprises two identical blocks and is arranged in a mirror image on the outer periphery of the fixed block (3), and the polarization directions of the two deceleration permanent magnets (4) are both perpendicular to the axial direction of the magnetorheological fluid conveying pipe (2); the two deceleration permanent magnets (4) are both fixed in the following manner: one end is fixed to the inner wall of the magnetically conductive shell (1), and the other end is fixed to the outer wall of the fixed block (3).

The application discloses a kind of full material state multi-field coupling magnetic phase change regulation and control method and application system, it is related to magnetic phase change technical field, it solves the technical problem that existing technology exists excitation source single and material state range narrow, including the following steps: step 1, based on the determination rule of excitation source, at least one of magnetic field, electric field, temperature field, stress field is selected to constitute the excitation source, and the interaction of the excitation source and the electron spin or magnetic moment of substance occurs and changes system free energy;Established the unified regulation and control method covering multiple excitation sources, multiple material states, solved the technical problems that existing technology excitation source is single, material state range is narrow;Provide specific material system and implementation mode, cover solid alloy, liquid magnetorheological fluid, soft matter hydrogel, high-entropy alloy and multiple material states;Application system integrates memory energy storage and trace displacement driving dual function, can be applied to new energy storage, micro-nano precision manufacturing, aerospace, biological medical treatment and other fields.

This application relates to the technical field of structural dynamics testing equipment, and discloses a device and method for combined control of magnetorheological fluid and metal spring sheet for drop hammer impact testing. The device includes: a test bench comprising a rigid base, a vertical support column, and a horizontal fixed beam; a drop hammer system for lifting and releasing the drop hammer body; a combined control loading system for providing stiffness support; a uniformly distributed load transfer system for receiving the impact load and converting it into a line load for transfer to the beam / column component under test; a parameter monitoring system for data acquisition; and a control system for controlling the release of the drop hammer body and adjusting the current of the excitation coil. This invention, by employing the combination of magnetorheological fluid and metal spring sheet, and utilizing the synergistic effect of the continuously adjustable damping of the magnetorheological fluid and the stiffness support of the metal spring sheet, can achieve impact pulse trimming, thereby avoiding the shortcomings of traditional airbag and rubber loading methods, such as narrow control range and low precision.

A magnetorheological magic angle polishing tool and processing method are disclosed. The tool includes a polishing wheel, a drive motor, a magnet, and a magnetorheological fluid system, and integrates a magic angle control rotary table (C-axis) driven by the motor. The polishing wheel, its drive motor, and the magnet are all mounted on this rotary table, forming a tool head that can rotate as a whole. By adding this independent C-axis, this invention achieves decoupling of processing path planning and magic angle control. The control software calculates and controls the C-axis rotation in real time based on the workpiece surface equation, the planned path, and the calibrated optimal magic angle, so that the polishing wheel can maintain a stable magic angle with the local normal of the workpiece at any point during the processing of complex curved surfaces in a plane perpendicular to the feed direction. This method fundamentally overcomes the problems of angle instability and path limitation caused by traditional reliance on machine tool XY axis linkage, and significantly improves the mid-frequency error suppression effect, process adaptability, and shaping capability.

The present application relates to the field of generator assembly machining positioning, in particular to a kind of generator assembly machining tool clamp.It includes machine table, the upper end of machine table top is rotationally arranged with electric turntable, the upper end of electric turntable is coaxially fixed with tray, and the upper end of tray is provided with flexible bag filled with internal magnetorheological fluid;Tray upper end is arranged with lug positioning mechanism in equiangular array along the circumferential direction, each lug positioning mechanism includes support plate, top pin fixed to the middle part of support plate and positioning pin coaxially slidingly arranged with top pin, and positioning pin and top pin are respectively sleeved with conical rubber sleeve for auxiliary positioning clamping.The present application is combined with magnetorheological fluid full-wrapping support by bidirectional lug positioning, to realize the non-magnetic aluminum alloy end cover high-precision positioning without damage, without processing interference, strong adaptability, suitable for the inner cavity batch processing procedure of generator end cover, solve the problem that the datum of existing generator end cover reverse buckle machining tool does not coincide, workpiece is easy to deform, processing interference and poor positioning stability.

The present disclosure relates to a method and system for regulating the damping of a magnetorheological fluid landing gear of an aircraft. The method comprises: obtaining parameters required for regulating a current of an excitation coil of the magnetorheological fluid landing gear; generating a profile of the current over time from a current time based on the obtained parameters for regulating the current; and applying the profile of the current to control the current applied to the excitation coil to regulate the damping of the magnetorheological fluid landing gear.

The utility model relates to the technical field of coupler discloses a motor with magnetorheological fluid transmission device, including base, the inside fixedly connected with motor body of base, the output end connected with connecting shaft of motor body, the outer wall rotationally connected with condensate tank of connecting shaft, the inside of condensate tank is provided with shell no.