432 results about "Levitation" patented technology

A system and method in at least one embodiment provides magnetic levitation to a vehicle above and / or partially about a rail or track using a flux field generator having a plurality of members having mated waveform patterns. In a further embodiment, the magnetic levitation also uses a distribution system. In a further embodiment, the plurality of members forms a disk-pack turbine. In a further embodiment, the flux field generator is not vehicle based.

A system and method in at least one embodiment generates, transmits and distributes a diamagnetic field using a flux field generator and a distribution system. In at least one embodiment, the flux field generator is mounted on a platform or a vehicle. In a further embodiment, the flux field generator is not vehicle based.

The invention discloses an electromagnetically-supported hybrid magnetic thrust bearing structure and a suspension force design method, and provides a hybrid magnetic bearing structure design in which radial alternate magnetization is adopted in the axial direction, a permanent magnet bearing formed by stacking multiple layers of magnetic rings bears all axial thrust loads, and radial electromagnetic bearings are assisted at the two ends to maintain dynamic stability of a rotor. The performance requirements of high bearing capacity, low power consumption, good active control capability and high dynamic stability of the hybrid magnetic thrust bearing in a limited space are met; in order to solve the problems that an inner magnetic ring and an outer magnetic ring are not strictly centered due to the influence of machining precision, an assembly process, rotor eccentricity and the like during actual operation of a permanent magnet thrust bearing, additional unbalance load, dynamic unbalance load and the like are generated in the radial direction. The electromagnetic supporting suspension force design method comprehensively considers the radial unbalance load of the permanent magnet thrust bearing, the dynamic unbalance load of the rotor and the self-weight influence, effective calculation of the suspension force of the supporting rotor is achieved, and important technical support is provided for the hybrid magnetic thrust bearing structure and suspension force design iteration.

The present invention discloses a construction method of a bilateral suspension motor. By using the Fourier decomposition method to analyze the magnetic field pole pairs of the permanent magnet in the air gap, the suspension winding is wound to generate a stable suspension force. First, determine the permanent magnet pole pairs and the number of modulation blocks of the motor, then modify the magnetic potential of the permanent magnet into a sine wave, and use Fourier decomposition to determine the fundamental wave pole pairs and rotation speed of the permanent magnet in rotation and at rest. According to the conditions for generating the suspension force, screen out possible suspension winding winding methods. Finally, according to the proposed constraint condition (n r -p s ) = p s ±2 and the principle that two magnetic fields with a difference of one pair of poles generate suspension force pulsation to determine the optimal suspension winding winding method. The suspension winding winding method provided by the present invention can set the winding of a specific suspension winding on the outer stator under the condition of determining the stator and rotor structure of the bilateral motor, so as to reduce the pulsation of the suspension force of the motor and generate a relatively stable suspension force.

According to the implantable magnetic suspension blood pump structure, an impeller is suspended in a containing cavity of a pump shell and can rotate around the central axis of the pump shell, and blood is sucked in from an inlet and discharged from an outlet; the motor comprises a motor stator assembly arranged in the pump shell and a rotor magnet array arranged on the impeller. The magnetic suspension device comprises an electromagnet arranged in the pump shell and a suspension magnet assembly arranged on the impeller, and electromagnetic suspension force provided by the electromagnet and passive permanent magnet bias suspension force provided by the suspension magnet assembly jointly maintain suspension balance of the impeller. The motor and the magnetic suspension device are independently controlled, so that the negative influence of low signal detection accuracy caused by magnetic field coupling is effectively reduced; the hybrid magnetic suspension structure reduces power consumption of the magnetic suspension device; the arrangement positions of the motor stator assembly and the electromagnet enable the blood pump to be compact in structure and reduce the size and weight; the gap and the position of the electromagnet and the suspension magnet assembly are accurately controlled, accurate control over the suspension position of the permanent magnet is achieved, and the pumping efficiency and stability of the blood pump are improved.

The invention relates to the technical field of conveying equipment, in particular to a magnetic suspension flexible conveying system which comprises a stator guide rail module, a rotor suspension module, a suspension gas module, a magnetic force driving module, a control module and a detection module. The stator guide rail module comprises an installation support, a guide rail is fixedly installed on the installation support, the rotor suspension module is installed on the guide rail, air guide holes are evenly distributed in the guide rail, an air guide channel communicated with all the air guide holes is formed in the guide rail, and the air guide channel is connected with the suspension air module. According to the application, gas suspension and magnetic force driving are fused, real-time monitoring is realized through the detection module, precise regulation and control are realized through the control module, high-precision positioning and track control of the rotor suspension module are realized, and the requirements of high-precision industries such as electronics and precise instruments are met. According to the non-contact design, friction and part abrasion are greatly reduced, the operation resistance is small, the energy consumption is low, the system stability is high, interference and load change can be rapidly adjusted, and the reliability is high.

A linear electrical machine including a frame with a level reference plane, an array of electromagnets connected to the frame and coupled to an alternating current power source energizing each electromagnet, at least one reaction platen of paramagnetic, diamagnetic, or non-magnetic conductive material disposed to cooperate with the electromagnets of the array of electromagnets so that excitation of the electromagnets with alternating current generates levitation and propulsion forces against the reaction platen that controllably levitate and propel the reaction platen along at least one drive line, in a controlled attitude relative to the drive plane, and a controller operably coupled to the array of electromagnets and the alternating current power source and configured so as to sequentially excite the electromagnets with multiphase alternating current with a predetermined excitation characteristic so that each reaction platen is levitated and propelled with up to six degrees of freedom.

The invention provides a magnetic suspension dispersing device for blending a polymer drag reducer and a use method. A supporting body II is installed on a base, a supporting body I is installed on the supporting body II, a suspension electromagnet is installed in the base, a rotating shaft is rotatably installed in the supporting body II, a permanent magnet is installed at the bottom of the rotating shaft, and the suspension electromagnet is located below the rotating shaft. The magnetic rotating rotor is installed on the rotating shaft, the magnetic rotating stator is installed in the supporting body II and arranged on the outer side of the magnetic rotating rotor in a surrounding mode, the supporting shaft is connected with the rotating shaft, and the dispersing stator and the electromagnet stator are both installed in the supporting body I. The magnetic dispersing rotor is connected with the supporting shaft. The magnetic dispersion rotor is arranged on the outer side of the dispersion stator in a surrounding mode, the annular permanent magnet is arranged on the outer side of the magnetic dispersion rotor in a sleeving mode, and the electromagnet stator is arranged on the outer side of the annular permanent magnet in a surrounding mode.

The present invention relates to the technical field of automatic control, and provides a unified suppression method for external disturbances and internal levitation force ripples of a magnetic levitation motor system, comprising: acquiring time-varying levitation force data of a magnetic levitation motor, and converting the time-varying levitation force data of the magnetic levitation motor into nominal levitation force feedback data of a time-invariant levitation force; designing a Kalman observer on the basis of the nominal levitation force feedback data; the Kalman observer observing and acquiring external disturbance and internal levitation force ripple data of a magnetic levitation motor system; and forwards feeding and supplementing the external disturbance and internal levitation force ripple data of the magnetic levitation motor system into a levitation control system of the magnetic levitation motor, thereby achieving unified suppression of external disturbances and internal levitation force ripples of the magnetic levitation motor system. The present invention can effectively reduce the influence of external disturbances and internal levitation force ripples on a magnetic levitation switched reluctance motor, thereby effectively improving the levitation precision and the anti-disturbance performance of a magnetic levitation switched reluctance motor system.

A control method and apparatus for a magnetic levitation compressor, an electronic device and a storage medium. The control method comprises: in response to shutdown of a magnetic levitation compressor, acquiring the rotating direction of a rotor; on the basis of the operating state of the magnetic levitation compressor and the rotating direction being the reverse direction, acquiring the rotating speed of the rotor; on the basis of the rotating speed being greater than a first threshold value and not greater than a second threshold value, acquiring a delayed levitation stop duration corresponding to the rotating speed of the rotor; on the basis of a rotation duration of the rotor reaching the delayed levitation stop duration, controlling the rotor to stop levitating; and, on the basis of the rotating speed being greater than the second threshold value, controlling a frequency converter to brake the magnetic levitation compressor. The control method does not need to use valve body members to prevent reverse rotation of rotors of magnetic levitation compressors, thus improving the control stability for magnetic levitation compressors and the operation reliability of magnetic levitation compressors.

Positioning system (1) for aligning a coupling component (B), in particular an optical fiber, relative to an optical or electronic application component (A), the positioning system (1) comprising: a base body (10) on which the application component (A) can be fixed, a magnetic field generating device (20) arranged on the base body (10) and designed to generate a levitation magnetic field (M), an actuating element (40) which is mechanically decoupled from the base body (10) and movable relative to it, and comprising: at least one permanent magnet (43) and a holding device (45) for holding the coupling component (B), a levitation control device (60) which, in conjunction with a control device (70) functionally connected to the levitation control device (60),a floating movement of the permanent magnet (43) relative to the base body (10) and a coupling of the coupling component (B) to the application component (A) causes, and methods for aligning a coupling component on an optical or electronic application component,

The embodiment of the invention provides a flywheel direct-driven cogeneration unit dynamic adjusting system and a control method thereof, in the embodiment of the invention, a magnetic suspension technology is adopted to eliminate friction of a traditional mechanical bearing, and quick starting and stopping of the rotating speed of a flywheel are realized; the high-temperature superconducting magnetic clutch achieves instantaneous mechanical coupling / decoupling of the flywheel and the circulating pump through the zero resistance characteristic, and the response time is short. The frequency modulation requirement of a new energy power grid can be matched, and meanwhile hard constraint of thermal load fluctuation on electric energy output is avoided. The mechanical direct-drive path directly utilizes the kinetic energy of the flywheel to drive the circulating pump, so that a multi-stage energy conversion link in a traditional mode is omitted; the electric adjusting path realizes bidirectional power exchange between the flywheel and a power grid through an energy interface device, and the loss of an inverter is reduced; and the high-temperature superconducting magnetic clutch realizes zero-energy-loss transmission in a coupling state. The magnetic suspension flywheel set adopts a non-contact suspension technology, so that mechanical wear is eliminated; the high-temperature superconducting magnetic clutch achieves non-contact transmission through magnetic coupling, and friction loss is avoided.

An apparatus for contactless transportation of a carrier is provided. The apparatus includes the carrier, being a substrate carrier or a mask carrier. The apparatus includes a linear reluctance motor for providing both a contactless levitation and a contactless drive of the carrier. The linear reluctance motor includes one or more linear stators defining a transportation track for the carrier. The linear reluctance motor includes a mover attached to the carrier. The linear reluctance motor includes a set of electromagnets and a first magnetic material. The one or more linear stators include the set of electromagnets and the mover includes the first magnetic material, or the mover includes the set of electromagnets and the one or more linear stators include the first magnetic material. The apparatus includes a controller connected to the set of electromagnets.

A linear electrical machine includes a frame, an array of electromagnets, and at least one reaction platen, where excitation of the electromagnets generates levitation and propulsion forces against the at least one reaction platen that controllably levitate and propel the at least one reaction platen along at least one drive line, in a controlled attitude relative to the drive plane. A controller system with coil controllers sequentially excites the electromagnets with a predetermined excitation characteristic so as to describe six degree of freedom reaction platen control of each of the at least one reaction platen, and the at least one reaction platen is levitated and propelled with at least four degrees of freedom. Each respective coil controller is coupled to electromagnets at a predetermined location so that the electromagnets at the corresponding predetermined location are controlled by the respective coil controller separate and distinct from each other coil controller.

A stator core, a stator component, a stator assembly, a levitation motor, a suspension system, and a vehicle. The stator core comprises a stator tooth portion, a stator yoke portion, and a tooth-yoke transition piece, the stator yoke portion being connected to the stator tooth portion, and at least one of the stator yoke portion and the stator tooth portion being a multi-layer structure; the tooth-yoke transition piece is connected to both the stator yoke portion and the stator tooth portion, allowing the stator yoke portion to connect to the stator tooth portion.

An apparatus for contactless transport of a carrier is provided herein. The apparatus includes a carrier that is a substrate carrier or a reticle carrier. The apparatus includes a linear reluctance motor for providing both non-contact suspension and non-contact driving of the carrier. The linear reluctance motor includes one or more linear stators that define a transport track for the carrier. The linear reluctance motor includes a mover attached to the carrier. The linear reluctance motor includes a set of electromagnets and a first magnetic material. The one or more linear stators include a set of electromagnets and the mover includes a first magnetic material, or the mover includes a set of electromagnets and the one or more linear stators include a first magnetic material. The apparatus includes a controller connected to a set of electromagnets.

The invention discloses an anomaly detection method, device and equipment for a maglev train suspension system and a medium, and relates to the technical field of maglev train detection. The method comprises the following steps: acquiring multi-source operation time sequence data of a maglev train suspension system in real time; carrying out automatic feature extraction on the suspension system through a first neural network model to obtain feature vectors used for representing dynamic response behaviors of the suspension system under different working conditions; inputting the feature vector into a trained second neural network model to obtain an anomaly detection score; the second neural network model is a time sequence neural network and is used for outputting a quantitative score value representing the state abnormity possibility of the suspension system according to the input vector; and when the anomaly detection score indicates that the suspension system is in an abnormal state, performing fault mode classification on the abnormal state according to a preset fault classification rule. According to the technical scheme of the invention, the method breaks through the limitation that a conventional method is insufficient in coupling feature extraction, and achieves the precise anomaly detection and fault classification of the suspension system.

The present invention discloses a track beam structure for an ultra-high-speed maglev track test section and a forming method thereof, comprising a lower foundation, a beam-rail assembly located on the lower foundation, the beam-rail assembly comprising a propulsion groove, and suspension grooves located on both sides of the propulsion groove, the suspension grooves being parallel to the axis of the propulsion groove; the propulsion groove is used to install a propulsion magnet module, and the suspension groove is used to install a suspension magnet module. The purpose of the present invention is to provide a track beam structure for an ultra-high-speed maglev track test section and a forming method thereof, so as to solve the problem that the maglev track beam in the prior art is not suitable for use in the track of the ultra-high-speed maglev test section, and to achieve the purpose of providing a matching maglev track beam for the magnet module of the ultra-high-speed maglev technology.

The invention discloses a PLC-based high-pressure-ratio magnetic suspension centrifugal heat pump control method and system, and the method comprises the steps: carrying out the self-adaptive sampling rate adjustment through collecting operation data and PLC configuration information, generating a dynamic signal matrix, recognizing a key pressure ratio control loop, and extracting vibration envelope and surge precursor frequency to generate early warning characteristic parameters; reversely adjusting the rigidity damping ratio of the magnetic bearing to determine an anti-surge protection boundary; fin temperature difference detection information is monitored, a partition defrosting map is generated through asymmetric frosting rate analysis, and minimum energy consumption analysis is executed to determine a reversing valve switching time sequence; performing operation characteristic and oil-gas migration coupling analysis to generate oil-gas separation optimization parameters, adjusting a magnetic suspension gap to extract a zero-power-consumption suspension interval, and constructing layered energy-saving control configuration; a preventive maintenance time window is generated through magnetic bearing current ripples, a fault-tolerant degradation operation mode and a self-adaptive control strategy are established, a heat pump control instruction is finally generated, and intelligent control over the high-pressure-ratio magnetic suspension centrifugal heat pump is achieved.

An apparatus for contactless transportation of a carrier is provided. The apparatus includes the carrier, being a substrate carrier or a mask carrier. The apparatus includes a linear reluctance motor for providing both a contactless levitation and a contactless drive of the carrier. The linear reluctance motor includes one or more linear stators defining a transportation track for the carrier. The linear reluctance motor includes a mover attached to the carrier. The linear reluctance motor includes a set of electromagnets and a first magnetic material. The one or more linear stators include the set of electromagnets and the mover includes the first magnetic material, or the mover includes the set of electromagnets and the one or more linear stators include the first magnetic material. The apparatus includes a controller connected to the set of electromagnets.

The present invention discloses a magnetic levitation washing machine, comprising a housing and a washing drum disposed within the housing. A magnetic levitation motor is disposed at the bottom of the housing, and a magnetic induction unit is correspondingly disposed in the washing drum. When energized, the magnetic levitation motor interacts with the magnetic induction unit to generate a levitation force that elevates the washing drum and / or a driving force that rotates the washing drum. In the present invention, when energized, the magnetic levitation motor interacts with the magnetic induction unit to elevate and / or rotate the washing drum. This effectively reduces noise generated by vibration during the washing drum's rotation, ensures operational stability, and enhances the user experience. Furthermore, the number of shock-absorbing components is reduced, effectively reducing the weight of the washing machine and lowering production costs.

The invention discloses non-contact suspension stirring equipment and a stirring method thereof. The non-contact suspension stirring equipment comprises a basic fixing assembly, a main transmission assembly, a suspension supporting system and a suspension stirring mechanism. Equipment is fixed to the bottom of a liquid container through a flange and an isolation sleeve, after a motor adjusts the rotating speed to a proper stirring speed through a speed reducer, a main shaft of the speed reducer drives an input shaft to rotate through a coupler to drive a driving rotor shell and a magnet in the driving rotor shell to generate a rotating magnetic field, and a suspension stirring mechanism is driven to rotate through magnetic coupling of an inner magnet and an outer magnet. The suspension supporting system adopts the homopolar repulsion principle to enable the stirring mechanism to be suspended, a sliding bearing is formed through a silicon carbide wear-resistant shaft sleeve, and frictional wear is reduced. Non-contact power transmission between the main transmission assembly and the stirring mechanism is achieved, mechanical seal leakage and pollution are avoided, and the device has the advantages of being resistant to abrasion, low in shearing, low in energy consumption, stable in operation and the like, is suitable for occasions needing sterile and low-shearing stirring such as biological medicine, dairy products and beverages and has wide industrial application value.

The invention relates to the technical field of magnetic suspension, and aims to solve the problems that the layout mode that a suspension electromagnet and a linear induction motor of a traditional magnetic-levitation train are independent of each other occupies a large space, and normal force of the linear induction motor has a negative effect on suspension force. The invention provides a magnetic-levitation train traction suspension combined type induction rail and a traction suspension system electromagnetic structure. The traction suspension combined type induction rail comprises an electromagnet induction rail body, the electromagnet induction rail body is arranged below a track beam in the line direction, protrusions are downwards formed on the two sides of the electromagnet induction rail body, the end faces of the protrusions are the pole faces of the electromagnet induction rail body, and an installation cavity is formed between the protrusions on the two sides. A mounting rail is arranged in the mounting cavity, and the mounting rail is connected with the electromagnet induction rail; a plane is formed at the bottom of the mounting rail and is a secondary mounting surface of the linear induction motor; according to the invention, the occupied space can be reduced, and the suspension performance of the vehicle can be improved.

The event triggering robust model prediction control method for the maglev train suspension system comprises the following steps: S1, considering the influence of track irregularity interference, and establishing a mathematical model of the maglev train suspension system interfered by the track irregularity; s2, according to the established mathematical model of the suspension system and the state of the balance point of the suspension system, obtaining a tracking error model of the suspension system; s3, establishing an equivalent linear model, and calculating an equivalent state constraint and a control input constraint; s4, designing an event triggering robust model predictive control strategy by considering the state constraint and the control input constraint; s5, verifying recursive feasibility and system stability of the event-triggered robust model predictive control strategy; according to the method, the influence of track irregularity on the suspension system of the electromagnetic suspension train is eliminated, the suspension precision of the suspension system is improved, and the problems of calculation pressure and communication resource shortage caused by high-frequency control in the suspension control process of the magnetic suspension train are relieved on the basis of ensuring the suspension stability of the magnetic suspension train.

The invention provides a voice coil motor. The voice coil motor comprises a base, a stator assembly and a rotor assembly. The stator assembly comprises a coil assembly and an adjusting assembly, the coil assembly comprises a coil support and a coil, the coil support is cylindrical and is installed on the base, and the coil is wound on the outer side wall of the coil support. The adjusting assembly is arranged in the coil support and comprises a cylindrical adjusting support and adjusting magnetic steel installed on the adjusting support in a sleeving mode, and the adjusting support is connected with the base in the mode that the position can be adjusted in the axial direction. The mover assembly comprises a mover support and mover magnetic steel installed on the mover support, and the mover magnetic steel is arranged on the outer side of the stator assembly in a sleeving mode. According to the voice coil motor, the adjusting magnetic steel capable of moving in the axial direction is arranged in the stator assembly, the axial position of the adjusting magnetic steel is changed, the magnetic levitation force is adjusted, the gravity compensation range is expanded, the burden of lorentz force generated by coil electrification for levitation compensation is shared, coil current stability is kept, heating is reduced, precision is improved, and the response speed is increased; and the size of the motor is not increased.

The utility model discloses an auxiliary suspension and guide system based on a Halbach array. The auxiliary suspension and guide system based on the Halbach array comprises a suspension piece and a fixing piece. The suspension part comprises a T-shaped framework, an adjustable telescopic device, a rotary motor, an annular Halbach array and a rectangular Halbach array; the fixing piece comprises a bottom magnetic rail, a side magnetic rail and a U-shaped frame. When the rotary motor runs, the annular Halbach array is driven to rotate to interact with the side magnetic track, required guiding force and driving force are provided, the distance between the rectangular Halbach array and the bottom magnetic track can be adjusted through the telescopic rod, and required suspension force is provided. According to the utility model, the condition of transportation load is optimized, the equipment loss caused by contact friction is greatly reduced, the energy loss is reduced, and the stability and the precision of operation are improved.

The present invention relates to a wheel-rail type magnetic suspension vehicle system and its application, including a U-shaped channel and a magnetic suspension vehicle placed in the U-shaped channel; two permanent magnet roadbeds and a wheel roadbed are arranged at the bottom of the U-shaped channel, and permanent magnets A are laid on the two permanent magnet roadbeds; the magnetic suspension vehicle includes a body, a chassis, a front drive wheel and a rear drive wheel, permanent magnets B are arranged on both sides of the chassis, the permanent magnets B correspond to the permanent magnets A up and down and have the same polarity, and the front drive wheel and the rear drive wheel are placed on the wheel roadbed; power supply lines are arranged on both sides of the top of the U-shaped channel, and power pick-up cables are arranged on both sides of the body, and the power pick-up cables are in contact with the power supply lines to provide power for the magnetic suspension vehicle. The magnetic suspension vehicle of the present invention is an improvement on the original permanent magnetic suspension vehicle. The original permanent magnetic suspension vehicle cannot enable the vehicle to perform actions such as climbing, descending, and turning with a small radius, which greatly limits the development space. The present invention can effectively avoid the above defects and can meet most road conditions.

Disclosed in the present invention are a magnetic-levitation spatial curved beam molding system and molding method. The magnetic-levitation spatial curved beam molding system comprises: a side mold assembly; and functional part mold plate assemblies, wherein two functional mold plate assemblies are correspondingly arranged on two side mold plates, respectively, each functional part mold plate assembly comprises functional part mold plates used for locating a magnetic levitation functional part and at least two vertical adjustment assemblies, and driving ends of vertical adjustment parts are movably fitted with the bottoms of the functional part mold plates, respectively so as to adjust the spatial locations and angles of the functional part mold plates. The functional mold plate assemblies are provided to locate and mount the magnetic levitation functional part, and the vertical adjustment assemblies and lateral adjustment parts are provided to implement any adjustment of the spatial angles and locations of the functional part mold plates, so as to satisfy the requirement of adjusting the spatial location of the magnetic levitation functional part on a spatial curved beam, such that the arrangement location of the magnetic levitation functional part can be better matched with the structure of the spatial curved beam, and the molding precision of the spatial curved beam is ensured.

The present invention provides an automatic levitation body and a magnetic levitation device. The levitation body includes a housing and a magnetic member, the housing and the magnetic member being arranged to be relatively movable, and a linear guide mechanism arranged on the levitation body guides the relative movement of the magnetic member and the housing. By providing a magnetic member that is linearly or vertically movable within the levitation body, the present invention does not require a lifting mechanism to be provided within the levitation device base, and can easily achieve automatic lifting and landing of the levitation body relative to the levitation device base. This not only provides a very strong visual effect and sense of mystery, but also allows the levitation device base to maintain the conventional compact or miniaturized flat structure.

This invention relates to a closed-loop measurement device and method for the angular velocity of a micro-gyroscope based on a single-beam optical trap, belonging to the field of inertial navigation technology. It includes a vacuum cavity, a micro-gyroscope, an optical trap levitation module, a rotation detection module, and a feedback control module. The micro-gyroscope is placed inside the vacuum cavity, and the optical trap levitation module is positioned below the vacuum cavity. The optical trap levitation module can converge a first laser beam from bottom to top into the vacuum cavity to form a vertical optical trap, thus leviting the micro-gyroscope. The rotation detection module can horizontally converge a second laser beam onto the micro-gyroscope and split the second laser beam, after its polarization direction has been changed by the rotating micro-gyroscope, into two laser beams with different intensity ratios. The feedback control module can analyze the intensity ratio of the two laser beams and provide feedback control to the rotational angular velocity of the micro-gyroscope. This invention features high bandwidth, low noise, and high accuracy.