438 results about "Electromagnetic actuator" patented technology

Systems and methods for controlling an implantable pump are provided. For example, the exemplary controller for controlling the implantable pump may only rely on the actuator's current measurement. The controller is robust to pressure and flow changes inside the pump head, and allows fast change of pump's operation point. For example, the controller includes, a two stage, nonlinear position observer module based on a reduced order model of the electromagnetic actuator. The controller includes an algorithm that estimates the position of the moving component of the implantable pump based on the actuator's current measurement and adjusts operation of the pump accordingly. Alternatively, the controller may rely on position measurements and / or velocity estimations.

The invention relates to the technical field of hydrogen storage system testing, and discloses a one-way valve combined hydrogen storage system durability test bench and a test method. A main control computer of the rack is used for configuring test task parameters, coordinating operation of subsystems and processing test data; the high-pressure hydrogen supply subsystem comprises a pressure-adjustable hydrogen source and a pressure closed-loop control module, and can apply accurate and controllable hydrogen pressure to the inlet end of the tested system according to test task parameters; the multi-channel valve state acquisition subsystem acquires the inlet and outlet pressure of the valve, the surface temperature of the valve body and vibration spectrum data in real time through pressure, temperature and vibration sensor arrays arranged at the valves, and transmits the data to the main control computer; the valve action driving subsystem comprises a high-speed electromagnetic actuator array and a displacement feedback module and can drive all valves to execute a preset opening degree sequence and opening and closing frequency. And the durability evaluation subsystem is embedded into the main control computer, calculates the accumulated damage degree of the valve and predicts the residual life cycle.

An electronic device is configured to provide haptic feedback to a user based on an input action associated with an input device. The electronic device includes a haptic engine operably connected to a processing device. The haptic engine includes an electromagnetic actuator that detects an input action associated with the input device. The electromagnetic actuator also produces a haptic output in response to the detection of the input action.

The invention discloses a high-speed motorized spindle integrating an electromagnetic actuator and a magnetofluid bearing and a using method. The high-speed motorized spindle comprises a spindle body, and a spindle body of the spindle body is supported through the arranged magnetofluid bearing; an electromagnetic actuator system used for detecting and controlling fluttering of the main shaft is arranged at the end of the main shaft and comprises a displacement detection mechanism used for detecting fluttering displacement of the main shaft and an electromagnetic vibration suppression mechanism used for applying electromagnetic force to suppress fluttering of the main shaft according to the detection result of the displacement detection mechanism. According to the magnetofluid bearing, stable and high-rigidity support is provided for a shaft by using a magnetofluid medium and utilizing the characteristic that the viscosity of the magnetofluid can be changed under an external magnetic field; and meanwhile, the electromagnetic actuator actively controls vibration generated in the machining process through accurate magnetic field control, and the stability of the main shaft in the machining process can be effectively improved. Through the combination of the two, the overall stability and the dynamic response capability of the system are remarkably improved.

The electromagnetic active suspension is used for being connected between a vehicle body and wheels of a motor vehicle and is characterized in that the electromagnetic active suspension comprises an electromagnetic actuator and a magnetorheological damper, the electromagnetic actuator is a linear motor, and the linear motor comprises a permanent magnet cylinder, a primary winding and a bearing connected with the permanent magnet cylinder and the primary winding; the magneto-rheological damper and the linear motor are integrated in the same suspension assembly, the electromagnetic actuator and the magneto-rheological damper are integrated in the same suspension assembly, the integration level of the electromagnetic active suspension is greatly improved, the linear motor is adopted as a main power source, and structure compactness and function collaboration are achieved. The direct driving mode of the linear motor abandons a complex pipeline of a traditional hydraulic system, mechanical inertia is reduced, and the response frequency is greatly improved and far exceeds the upper limit of a hydraulic suspension. The invention further discloses a vehicle which adopts the electromagnetic active suspension, the adaptability of the vehicle under extreme working conditions such as cross-country and racing tracks can be improved, and the optimal balance between control and comfort is achieved.

According to the present invention there is provided an active vibration control system comprising: an electromagnetic actuator and a control element, the electromagnetic actuator being operable to apply a force on a base structure to which the active vibration control system is attachable such that vibrations of the base structure are actively controllable by the application of said force, wherein the electromagnetic actuator and control element are relatively moveable such that the active vibration control system has at least two modes of vibration, and wherein movement of the electromagnetic actuator causes movement of at least a part of the control element.

The invention relates to a vibration suppression-oriented electromagnetic actuator data driving collaborative optimization design method, and belongs to the technical field of electromechanical equipment optimization design. Sample data are collected through Box-Behnken experimental design, a Gaussian process regression agent model is constructed based on the data, and a nonlinear complex mapping relation between each objective function and a design parameter is accurately represented. The influence degree of the design parameters is quantitatively evaluated through sensitivity analysis, the main design variables and the secondary design variables are distinguished accordingly, and the optimization efficiency is improved. Multi-objective optimization is carried out for the main design variables, and a design scheme with the optimal comprehensive performance is selected from a Pareto solution set through an objective decision-making mechanism based on an ideal point method in combination with the optimization result of the secondary design variables. According to the method, limitation of a traditional physical model is broken through through data-driven modeling, global optimization balance of electromagnetic performance, loss and volume is realized, and an efficient and quantifiable evaluation method is provided for design of the high-performance electromagnetic actuator.

The invention discloses an electromagnetic actuator with a rigidity compensation function. The end face of the inner side of a stator iron core of a C-shaped structure is provided with a trapezoidal slope notch, and the working face of a rotor is a slope matched with the notch of the stator iron core; the N pole and the S pole of the permanent magnet are attracted to the upper end arm of the stator core, the coil winding is wound on the yoke portion of the stator core, the flexible guide mechanism is connected with the rotor and the base, the lower end arm of the stator core is connected with the base through a fastener, and the fastener is screwed to adjust the relative distance between the end face of the stator core and the working face of the rotor. According to the invention, the rotor and the stator core form an inclined air gap, and the linear displacement of the rotor is not equal to the normal thickness of the air gap any more, but is amplified in geometrical relationship. The fundamental contradiction of strong coupling of the stroke and the thickness in a traditional plane air gap is overcome, on the premise that a small initial normal air gap is maintained, the macroscopic motion stroke several times of the thickness is achieved, and the problem that large stroke and high linearity are difficult to consider at the same time is solved from the structural principle.

The invention relates to the technical field of electromagnetic actuator state monitoring, in particular to an electromagnetic valve operation process stability and clamping stagnation detection combined test method, which comprises the following steps of S1, synchronously acquiring a coil current signal, a valve core displacement signal and an outlet pressure pulsation signal; s2, converting the current signal acquired in the S1 into an equivalent electromagnetic force waveform, a speed-acceleration trajectory and a pressure gradient curve; s3, extracting an electromagnetic force zero-crossing distortion rate, an inertia abrupt change point of a speed-acceleration trajectory and an oscillation attenuation coefficient of a pressure gradient curve; s4, calculating a time offset, and generating a primary clamping stagnation early warning; s5, obtaining a stability degradation index; and S6, when primary clamping stagnation early warning is triggered and the stability degradation index exceeds a dynamic threshold value, outputting a conclusion of a clamping stagnation-instability coupling fault. According to the method, high-precision and real-time identification of the clamping stagnation and stability deterioration faults of the electromagnetic valve is realized by fusing the multi-dimensional signal features and a double-criterion judgment mechanism.

A laboratory sample distribution system is provided comprising: a number of container carriers, wherein the container carriers each comprise a magnetically active device and are adapted to carry a sample container; at least one fan being adapted to cause an airflow; and a number of transport modules, the transport modules being arrangeable adjacent to one another and respectively comprising: a transport surface being adapted to carry the container carriers; a number of heat dissipating electromagnetic actuators being stationary arranged below the transport surface, the electromagnetic actuators being adapted to move container carriers placed on top of the transport surface by applying magnetic forces to the container carriers; and an air guiding element being adapted to guide the airflow first towards an underside of the transport surface and afterwards towards the electromagnetic actuators.

Disclosed is a coarse positioning apparatus for a stage apparatus, the coarse positioning apparatus comprising: at least one gas spring, each said at least one gas spring comprising a piston; and at least one electromagnetic actuator; wherein said at least one gas spring and said at least one electromagnetic actuator are operable to each apply respective complementary forces to said stage apparatus so as to accelerate said stage apparatus for coarse positioning of said stage apparatus, and wherein at least said gas spring is coupled to said stage apparatus throughout each full stroke of said stage apparatus.

The invention belongs to the technical field of vibration control, and provides a robust sliding mode control method and system for milling chatter of a frame beam type aviation thin-walled workpiece, and the technical scheme is as follows: determining cutter chatter active control application conditions; modeling is conducted on all corner milling technological processes through kinematics and dynamics, the corner milling process chip thicknesses in all the technological processes are established respectively, and the instantaneous milling force of a cutter is calculated in combination with the chip thicknesses; the flexibility of the cutter is considered, and a milling system flutter motion equation is established; based on a flutter motion equation of the milling system, considering cutting-in working condition change, unmodeled dynamics and external interference existing in the system, and designing a robust sliding mode controller of the system; the electromagnetic force in the milling system is calculated based on the designed electromagnetic force actuator control scheme, the control current of the electromagnetic actuator is calculated according to the input of the robust sliding mode controller of the system and the electromagnetic force, and non-contact control over the rotary cutter handle is achieved. The problem that milling chatter active control is poor in robustness and reliability is solved.

The invention relates to the technical field of vibration suppression, and discloses a multi-physics field cooperative control intelligent vibration suppression method and system, and the method comprises the following steps: S1, building a multi-physics field digital twinborn model based on a finite element analysis method, the multi-physical field at least comprises a coupling relationship among a pneumatic field, an electromagnetic field and a structural field, and the modeling of the fluid-structure interaction effect is included; and S2, based on the digital twin model, an improved particle swarm optimization algorithm is adopted to generate a control weight distribution scheme, and the control weight distribution scheme is used for dynamically adjusting the output proportion of a pneumatic actuator and an electromagnetic actuator. According to the method, the multi-physical field digital twinborn model containing the coupling relation of the pneumatic field, the electromagnetic field and the structural field and taking into account the fluid-solid coupling effect is established, so that the problem that the control precision is limited due to the fact that a single physical field control strategy is mostly adopted in a traditional vibration suppression method is solved.

A control module is provided for driving a vehicle relative to a track with a first and second rail both having a reluctance varying over the length of the track The vehicle comprises a first electromagnetic actuator module arranged to interact with the first rail; and a second electromagnetic actuator module arranged to interact with the second rail. The control module arranged to receive data indicating a distances between the electromagnetic actuator modules and the rails, relative positions of variations of the reluctance in the rails relative to the electromagnetic actuator modules. The control module is arranged to, based on the received data, generate a current signals and provide the generated current signals to the respective electromagnetic actuator modules.

The invention provides a variable load quasi-zero stiffness vibration isolator based on an electromagnetic actuator, and belongs to the field of low-frequency vibration isolation. Comprising a supporting structure composed of a shell and a bearing platform, a positive stiffness element, a negative stiffness element and an electromagnetic actuator, the positive stiffness element, the negative stiffness element and the electromagnetic actuator are coaxially installed in the supporting structure, load gravity on the bearing platform is detected in real time through a force sensor, and output force of the electromagnetic actuator is dynamically adjusted through a control circuit according to load changes. And the rigidity of the system at the balance position is zero so as to complete self-adaptive variable load compensation. According to the parallel structure, the dynamic stiffness is remarkably reduced while high static stiffness is guaranteed, and the problems that a traditional quasi-zero stiffness vibration isolator is non-adjustable in load and narrow in zero stiffness interval are solved.

An implantable pump system is provided, including an implantable blood pump suitable for use as a partial support assist device, the system further including an extracorporeal battery and a controller coupled to the implantable pump, and a programmer selectively periodically coupled to the controller to configure and adjust operating parameters of the implantable pump. The implantable pump includes a flexible membrane coupled to an electromagnetic actuator including a magnetic assembly and electromagnetic assembly, so that when the electromagnetic assembly is energized, the electromagnetic assembly causes wavelike undulations to propagate along the flexible membrane to propel blood through the implantable pump. The controller may be programmed by a programmer to operate at frequencies and duty cycles that mimic physiologic flow rates and pulsatility while operating in an efficient manner that avoids thrombus formation, hemolysis and / or platelet activation.

The invention provides a differential mechanism assembly. The differential mechanism assembly comprises a differential mechanism shell, a transmission clutch assembly arranged on the right side of the differential mechanism shell and a differential clutch assembly arranged on the left side of the differential mechanism shell. The state of the differential mechanism assembly can be switched by controlling the states of the transmission electromagnetic actuator and the differential electromagnetic actuator, so that the differential mechanism assembly is switched among a differential state, a power disconnection state and a differential locking state according to needs, the phenomenon of power reverse dragging during high-speed running of a vehicle is avoided, and the service life of the vehicle is prolonged. The escape capability of the vehicle when the vehicle runs on an uneven road surface is improved; besides, in the differential locking state, the power transmission route of the differential assembly is optimized, it is guaranteed that power of a differential shell can only be transmitted to a left half axle gear through a planetary gear sleeve and a differential clutch ring in sequence, the stress uniformity of the planetary gear sleeve and the differential clutch ring is effectively guaranteed, and the service life of the differential assembly is prolonged. Torsional deformation caused by uneven stress of the planetary gear sleeve and the differential clutch ring is avoided, and the service life of the planetary gear sleeve and the differential clutch ring is prolonged.

Aseptic dosing head (2, 60) for cryogenic liquid, comprising an aseptic reservoir (10) for cryogenic liquid communicating with a dosing outlet (24); a metering valve stem (30) extending through the aseptic cryogenic liquid reservoir (10) and having a lower distal end configured to selectively open and close the metering outlet (24); an electromagnetic actuator (40) attached to an upper end of the metering valve stem (30) and operable to move the metering valve stem (30) to open and close the metering outlet (24); and a seal (42) extending around the metering valve stem (30) and separating the aseptic cryogenic liquid reservoir (10) from a cavity (44) between the seal (42) and the actuator (40).

The utility model relates to an electromagnetic actuating mechanism and an electromagnetic valve, the electromagnetic actuating mechanism is applied to a shock absorber, a coil, a magnetic conductive tube, a sliding block and an ejector rod are arranged in a cylinder, the magnetic conductive tube is cylindrical, the coil is sleeved on the magnetic conductive tube, the bottom of the magnetic conductive tube is provided with an inwards sunken mounting groove, and the sliding block is arranged on the mounting groove in a sliding and penetrating manner; the lower end of the slider is connected with the upper end of the ejector rod; the highest point of the magnetic conductive tube is higher than that of the coil, and the lowest point of the magnetic conductive tube is lower than that of the coil. The electromagnetic actuating mechanism and the electromagnetic valve have the advantages that the magnetic conductive pipe can completely cover the range of the coil, electromagnetic force of the sliding block at different positions is kept at a constant value through saturation, the sliding block works stably, then the ejector rod works stably, the sliding block can move more accurately under the constant electromagnetic force, and the electromagnetic actuating mechanism is more stable in operation. When a user adjusts the shock absorber, the adjustment accuracy can be guaranteed, especially for reset of adjustment, the electromagnetic force is constant, the sliding block can reset accurately, and the use experience feeling of the user is improved.

An electronic trigger system with safety mechanism for firearms includes a trigger unit comprising an electromagnetic actuator operably coupled to the firing mechanism and a programmable trigger mechanism microcontroller. The actuator is changeable between a non-powered unactuated position and powered actuated firing position via pulling both an outer trigger and inner safety trigger of the trigger unit. The actuator is operably interfaced with a movable firing component of the firing mechanism operable to discharge the firearm. In a blocking position of the safety trigger, the safety trigger is configured to block outer trigger movement which prevents energizing and actuating the electromagnetic actuator thereby preventing the firearm from discharging. Conversely in an unblocking position, the safety trigger allows outer trigger movement sufficient to discharge the firearm by either energizing the actuator when a pre-selected trigger pull force threshold is applied or applying sufficient trigger force to manually trip the actuator.

A stator assembly (210), an electromagnetic actuator (1000), a vibration damping device (5000), a suspension system (10000) and a vehicle (20000), wherein the stator assembly comprises a plurality of core assemblies (211), a plurality of winding assemblies (212) and insulation frames (213), the plurality of core assemblies being sequentially stacked in the axial direction of the stator assembly, the plurality of winding assemblies being arranged on the plurality of core assemblies, and the insulation frame being provided between each core assembly and the corresponding winding assembly.

An electromagnetic actuator (1000), a vibration damping device (5000), a suspension system (10000), a vehicle (20000), and a transport (30000). The electromagnetic actuator comprises a housing (100), a first assembly (220) and a second assembly (210); the housing comprises a plurality of sub-housings (101); the plurality of sub-housings define an accommodating cavity (130), the first assembly and the second assembly being arranged in the accommodating cavity; one of the first assembly and the second assembly is connected to the housing; the first assembly and the second assembly are coupled to each other, such that one of the first assembly and the second assembly and the housing move along an axis.

The invention discloses an intelligent shafting vibration control system and method. The method comprises the steps that system hardware is set up, an eddy current displacement sensor is installed at a key position to monitor vibration displacement, an electromagnetic actuator is installed on a bearing seat to control bearing rigidity and damping through current, and a data acquisition and analysis system is configured to be connected with the sensor and the actuator and complete parameter setting; the method comprises the following steps: designing a vibration control algorithm, establishing a kinetic model and a noise model, solving an optimal feedback gain matrix and a state estimation value to calculate a control force, optimizing linear quadratic Gaussian (LQG) control parameters by using particle swarm optimization (PSO), defining a target, initializing, calculating fitness, updating particle parameters until conditions are met, and outputting an optimal solution; debugging and optimizing the system according to an actual operation condition, adjusting control parameters, and optimizing an algorithm and a structure to improve control performance and robustness; and finally, system testing and evaluation are carried out, performance and robustness tests such as vibration attenuation rate, control precision, response speed and stability under interference and noise are covered, and efficient and stable vibration control is realized.

An electromagnetic-actuator (EA) including a coil-element (CE) having a coil-core (CC) / coil arranged about the CC-circumference. The CC has a symmetrical first-region (FR) having an axis-of-symmetry (AOS), the CC being surrounded by the coil, and a movable-magnetic-armature-body (MM AB) as a movable-actuator-element (MAE) interacts with the CE to produce an AB activation-movement, and is supported in the actuator by a bearing-device (BD) and movable from a first / second-position by activating the CE. The BD is radially-offset to the CC AOS, and the AB extends from the BD radially over the CC from a first / second-side of the CC, which has a second-region (SR) extending radially beyond the FR and is on second-side (SS) of the CC between the coil / AB in the direction of AOS such that an air-gap between CC / AB in direction of the AOS is smaller on the SS of the CC than on first-side when the AB is in first-position.

The invention relates to a device for controlling and / or regulating the movement of an object with regard to high dynamics with high accuracy and low energy consumption, said device comprising an electromagnetic actuator (2) which is designed to move the object and which has a stator (3) and a rotor (4), the rotor interacts electromagnetically with the stator (3) to generate movement and is coupled with an object or carries the object; a flexible member (7, 12) for guiding and / or carrying the rotor (4); and at least one sensor (13) for detecting a movement of the rotor (4) and / or of the object, a sensor signal of the at least one sensor (13) generated on the basis of the movement of the rotor (4) and / or of the object being able to be used for controlling and / or adjusting the position of the rotor (4). The invention further relates to a corresponding method.

The present invention is entitled "Micro Airflow Generator for Micro Particulate Matter Sensor Module". Embodiments of the present invention generally relate to micro airflow generators that do not use fans or heaters to generate airflow (e.g., in compact optical PM sensors). Rather, embodiments of the present invention can generally use induced motion of a membrane / diaphragm element to generate airflow (where the motion of the membrane in turn causes motion in the air). For example, the membrane or diaphragm element can be driven by an (electronic) actuator element, such as an electromagnetic actuator or a piezoelectric disc bender (or some other means of vibrating / moving the membrane element in a manner that causes airflow). In some embodiments, the electromagnetic actuator itself can include a membrane that can serve as the membrane / diaphragm element and the electronic actuator element (such that the electromagnetic actuator can encompass the membrane element and the electronic actuator element, such as a magnet and a corresponding coil) and / or a piezoelectric disc bender.

The application discloses a rotor stability control device and method with a spherical hinge, which mainly comprises a measurer, a controller, an electromagnetic actuator and a spherical hinge bearing support. The method mainly comprises the following steps: real-time monitoring and acquisition of vibration state data of a spherical hinge balance disc during rotation of a rotor; generation of a control signal by the controller according to the monitored and acquired vibration state data; output of an electromagnetic force by the electromagnetic actuator according to the control signal; application of the electromagnetic force to the spherical hinge balance disc, suppression of vibration of the balance disc and adjustment of equivalent angular stiffness, angular damping and angular mass of the spherical hinge bearing support; and application of the equivalent angular stiffness, the angular damping and the angular mass to the rotor through a controllable flexible foundation, so as to realize rotor stability control.

An electromagnetic actuator assembly, integrated within a boring tool, for controlling unwanted machining vibration, comprising an outer tubular oscillating mass made of ferromagnetic material, through which the magnetic flux can pass; an inner stator that comprises an electromagnet assembly, located at the center of the tubular oscillating mass, for applying a controllable magnetic field to the oscillating mass; one or more damping elements, each having one or more springs and / or a damping material with predetermined stiffness and damping properties (such as a polymer or oil); a controller for providing a desired current to the electromagnets of the electromagnet assembly to obtain the controllable magnetic field; a holder for allowing the rotation of the electromagnet assembly to a desired angle, for stimulating the oscillating mass to apply a damping force, based on a combination of the magnetic field and stiffness and damping properties, which is aligned with the direction of the unwanted vibration.

The application relates to the technical field of hydrogen storage system testing, and discloses a one-way valve combined hydrogen storage system durability test bench and a testing method. A main control computer of the bench is used for configuring test task parameters, coordinating operation of each subsystem, and processing test data; a high-pressure hydrogen gas supply subsystem contains an adjustable pressure hydrogen gas source and a pressure closed-loop control module, can apply accurate controllable hydrogen gas pressure to an inlet end of a measured system according to test task parameters; a multichannel valve state acquisition subsystem acquires valve inlet and outlet pressure, valve body surface temperature and vibration spectrum data in real time through a pressure, temperature and vibration sensor array arranged at each valve, and transmits the data to the main control computer; a valve action driving subsystem contains a high-speed electromagnetic actuator array and a displacement feedback module, and can drive each valve to execute a preset opening degree sequence and opening and closing frequency; and a durability evaluation subsystem is embedded in the main control computer, calculates valve cumulative damage degree, and predicts a remaining service life.

According to the ship stabilization system based on the electromagnetic actuators and the control method, the upper electromagnetic actuator, the lower electromagnetic actuator, the left electromagnetic actuator and the right electromagnetic actuator serve as executing mechanisms and are arranged on the upper portion, the lower portion, the left portion and the right portion of the central axis of a ship respectively. Rapid response in a full-wave period range is achieved, hydraulic oil or water tank liquid is not needed, a pure electrification scheme is adopted, energy consumption is low, occupied space is small, maintenance convenience is high, and an excellent stabilization effect is achieved; according to the method, actual current output values of the upper electromagnetic actuator, the lower electromagnetic actuator, the left electromagnetic actuator and the right electromagnetic actuator can be solved according to attitude signals collected by a ship, inherent parameters of the ship and a ship rolling kinetic equation, and the service life balance of the electromagnetic actuators and the reliable stabilization effect of the system are achieved. And the method is of great significance in improving the safety and comfort of the ship.