3632 results about "Bearing (mechanical)" patented technology

The invention discloses a sliding bearing friction wear prediction method based on fluid mechanics, and relates to the technical field of mechanical state monitoring, and the method comprises the steps: collecting single-point temperature, local pressure, vibration time domain signals and a bearing pedestal inclination angle through a sensor, and generating sensor data; performing field reconstruction based on a fluid mechanics conservation equation on the sensor data to obtain multi-field data; performing spatial alignment on the multi-field data, inputting the multi-field data into a long short-term memory (LSTM) network, and generating wear state characteristics; training a sparse correlation vector machine regression model RVM by using the historical wear data, establishing a nonlinear mapping relationship between the wear state characteristics and the wear depth, taking the wear state characteristics as the input of the vector machine regression model RVM, and outputting the predicted wear depth; sensor data and the predicted wear depth are fused in real time through Kalman filtering, and when prediction deviation exceeds a covariance threshold value, vector machine regression model RVM parameters are updated.

Microelectromechanical component (100) for motion measurement, comprising: a fortified section (118); a single, central anchor (106) coupled to the attached section (118) with four sides; a first non-straight suspension element (108) coupled to the anchor (106) on one side of the anchor (106); a second non-straight suspension member (120) coupled to the anchor (106) on the same side of the anchor (106), wherein the second non-straight suspension member (120) has a shape and position that mirrors the first non-straight suspension member (108) on a plane (122) bisecting the anchor; and a test mass (104) which is planar, wherein the test mass (104) is suspended at least partially on the first non-straight suspension member (108) and the second non-straight suspension member (120) such that the test mass (104) is rotatable about the anchor (106) and displaceable in a plane which is parallel to the attached section (118), where the first and second non-straight suspension members (108, 120) are bending bearings, wherein the first non-straight suspension member (108) has a C-shape, wherein the C-shape includes an inner section (110) which is coupled to the anchor (106) and extends towards the plane (122) bisecting the anchor, a central section (114) which includes a nearby section and has a distant section, whereby the near section is coupled to the inner section (110), and the far section extends away from the anchor (106) along the plane (122) bisecting the anchor and is coupled to an outer section (112) extending away from the plane (122) bisecting the anchor.

The invention relates to the technical field of mechanical automation control, in particular to a bearing pressing machine control method and system. The method comprises the following steps: acquiring multi-dimensional monitoring data in a press fitting process; based on the difference between the monitoring data at the current moment and the data at each moment in the preset window, constructing a deviation degree sequence of each dimension at the current moment; adjusting the length of a preset window based on the correlation of the deviation degree sequence to obtain a target window at the current moment; determining a truncation distance of clustering analysis according to the data point distribution sparseness of the monitoring data in the target window; taking the truncation distance as a parameter, and performing clustering analysis on the data points in the target window through a density clustering algorithm to identify abnormal data points; and when the monitoring data at the current moment is abnormal, the bearing press-fitting machine is controlled to execute a preset response action. According to the method, the analysis window and the clustering truncation distance are adaptively adjusted, so that the accuracy of abnormal state recognition under the multi-stage working condition is improved.

The invention relates to a ship repair platform and a using method thereof, and belongs to the technical field of ship repair platforms, the ship repair platform comprises a movable base, an operation mechanical arm, an image recognition system and an intelligent control system, the movable base is provided with a magnetic attraction crawler belt and a hydraulic cylinder, and a vacuum suction cup is installed at the driving end of the hydraulic cylinder; a safety rope ring and a bearing base are fixedly installed on the movable base, the bearing base is rotationally connected with a loading platform, the three operation mechanical arms are evenly installed on the top of the loading platform, the three operation mechanical arms are provided with a high-pressure water gun, a laser rust removal head and a paint spraying nozzle correspondingly, and a device support is fixedly installed on the movable base. The device support is provided with an electric holder. According to the method, the damaged area of the outer wall of the ship body can be automatically recognized, cleaning, dirt removal and paint make-up operation can be accurately executed, the manual intervention requirement is reduced, and the maintenance efficiency is improved.

The invention relates to the technical field of vibration control, and discloses a quasi-zero stiffness vibration isolator imitating an insect jumping foot structure, which comprises a base and a bearing table between which a vertical spring is arranged, the two sets of connecting rod mechanisms are arranged between the base and the bearing table, each set of connecting rod mechanism comprises two lower connecting rods, two upper connecting rods and two middle connecting rods, the two lower connecting rods are hinged to the top face of the base, the two upper connecting rods are hinged to the bottom face of the bearing table, and the two middle connecting rods are distributed in an X shape; two ends of the two middle connecting rods are respectively hinged with the lower connecting rod and the upper connecting rod; the transverse springs are arranged at the hinged positions of the two lower connecting rods and the two middle connecting rods and the hinged positions of the two upper connecting rods and the two middle connecting rods correspondingly. The vibration isolator is simple in structure, small in transverse size, convenient to assemble and disassemble and easy to adjust, quasi-zero-stiffness vibration isolation is achieved through the special mechanical property of the overall structure, vibration energy can be efficiently absorbed, and the vibration isolator has wide application prospects in the field of low-frequency vibration control.

The invention provides a method for automatically centering and assembling a bearing on a long-axis part, and belongs to the technical field of bearing assembly.The method comprises the steps that position information of the long-axis part and the bearing is collected in real time through a binocular camera and a laser distance measuring sensor, a central line equation is calculated through the least square method, and position deviation is determined; a centering adjustment vector is generated to control a multi-degree-of-freedom precise attitude adjustment platform to perform preliminary adjustment, a mechanical arm is matched with high-precision laser ranging to perform precise centering, the centering process is modeled into a weighted undirected graph, an optimal adjustment path is solved, optimal press fitting parameters are calculated based on a bearing press fitting physical mechanics equation, and press fitting is performed. Meanwhile, the assembling process is monitored through a force sensor and a displacement sensor, an assembling quality evaluation matrix is constructed, finally, the assembling result is detected and evaluated, and high-precision automatic assembling of the long-axis part and the bearing is achieved.

The invention provides a fault diagnosis system of an intelligent bamboo cutting machine, which relates to the technical field of mechanical engineering and comprises a feature extraction module used for collecting current and voltage of a motor, a spindle vibration frequency spectrum and dynamic parameters of a quadrilateral monitoring area formed by a spindle bearing, a transmission gear box, a cutter clamping end and a base supporting part in real time, and a current waveform characteristic value, a voltage harmonic component, a vibration frequency domain energy distribution parameter and an abnormal parameter combination in the quadrilateral region are extracted. Through cooperation of multiple modules, parameter acquisition, material-load analysis, dynamic threshold setting, graded early warning and accurate fault diagnosis are realized, and the operation and production continuity of the bamboo cutting machine can be efficiently guaranteed.

A blood pump includes an impeller; a drive shaft coupled to the impeller and configured to rotate with the impeller; and a rotor coupled to the drive shaft and configured to rotate with the drive shaft. The rotor includes a driven magnet having an outer surface. A corrosion-resistant coating may be disposed on the outer surface of the driven magnet. A stator is disposed adjacent the rotor and configured to drive the rotor, causing the rotor to rotate; and a motor is configured to drive the stator. A protection assembly may be disposed adjacent the stator and configured to receive an end of the drive shaft, and may include a protection assembly housing enclosing a protective fluid chamber, the protective fluid chamber including the driven magnet and at least a portion of a bearing configured to engage the end of the drive shaft.

The invention discloses a measuring instrument for measuring the roundness of an inner ring and an outer ring of an automobile hub bearing, and particularly relates to the field of bearing roundness measurement, the measuring instrument comprises a working table, a rotating disc is arranged on the upper surface of the middle of the working table, an adsorption cavity is embedded in the surface of the middle of the working table, and air holes are formed in the surface of the rotating disc; a driving gear is fixedly connected to the outer wall of the middle of the driving shaft, a blade fan shaft is arranged on one side of the inner wall of the adsorption cavity through a bearing, a blade fan gear is fixedly connected to the outer wall of the middle of the blade fan shaft, a spiral blade fan is fixedly connected to the outer wall of the top of the blade fan shaft, and a measurement supporting assembly is arranged on one side of the rotating disc. An auxiliary adjusting assembly is arranged on the side, away from the measurement supporting assembly, of the rotating disc. According to the device, the spiral blade fan can be automatically driven to rotate through the rotation of the rotating disc, so that the workpiece is adsorbed, no mechanical clamping trace exists, the hub bearing workpiece is fixed through the assistance of adsorption force, and the detection stability is improved.

The invention provides a rotary table bearing-torque motor thermal vibration coupling modeling method, and relates to the technical field of machine tool reliability analysis. Comprising the steps of calculating bearing restoring force, torque and elastic rigidity; giving a dynamic balance equation of the main shaft system; unbalanced magnetic pulling force and unbalanced mass excitation are calculated; a displacement field is solved, and load changes caused by the displacement field are transmitted to the thermal model; the contact force borne by the bearing is updated by considering the load effect related to displacement, and the friction heat generation of the bearing and the heat generation of each part of the motor are calculated; calculating thermal deformation and thermal displacement of the bearing; thermal resistance among nodes is calculated, and a temperature field equilibrium equation is given through a thermal resistance network to achieve rapid thermal-mechanical coupling analysis; the thermal equilibrium equation is solved to calculate temperature response; importing the latest temperature into the kinetic model; lubricating grease viscosity and bearing thermal deformation are updated; and repeating the steps to finally obtain the main shaft displacement field and temperature field response. The method is high in accuracy, high in universality, low in test cost and high in test efficiency.

The invention discloses a deformation and bearing integrated modular rope-driven flexible mechanical arm and a self-sensing method thereof.The flexible mechanical arm comprises a driving mechanism and a variable-rigidity flexible mechanical arm body, the variable-rigidity flexible mechanical arm body comprises a rope, a corrugated pipe and elastic units, and the multiple elastic units are filled in an inner cavity of the corrugated pipe; the corrugated pipe is provided with a rope guide hole extending in the axial direction of the corrugated pipe, one end of the rope is fixedly connected with the power output end of the driving mechanism, the other end of the rope penetrates through the rope guide hole and is fixedly connected with the corrugated pipe, and when the driving mechanism works, the rope can be driven to move, and then the mechanical arm is pulled to deform. The flexibility of the mechanical arm is improved through fusion of active deformation and a bearing function, additional rigid structure supporting is not needed, and the overall design is simplified; and the bearing capacity and rigidity are adaptively improved through blocking of the elastic units, and the complexity of the driving system is reduced. Meanwhile, the mechanical arm is provided with a self-sensing system, the state of the mechanical arm can be monitored in real time, and the control precision is improved.

The invention discloses a flywheel and gravity hybrid energy storage system and method based on clutch mechanical coupling. The system comprises a high-speed inertia flywheel, a flywheel protection cover, a speed-increasing gearbox, a flywheel pit, a flywheel main shaft, a load-bearing fixing foundation, a bearing, a coupler, a motor, an equipment fixing device, an electromechanical detection device, a speed-reducing gearbox, a lifting system, a first high-speed clutch, a second high-speed clutch and an intelligent control unit. According to the invention, the quick response characteristic of the high-speed flywheel and the large-capacity advantage of gravity energy storage can be fully utilized to realize flexible switching of the high-speed flywheel and the gravity energy storage in different operation modes, and the closed state of the clutch is dynamically adjusted through the intelligent control unit, so that the frequency modulation, peak regulation and inertia support performance of a power grid is optimized; meanwhile, mechanical wear and energy loss are reduced, and the overall operation efficiency and reliability of the system are improved.

The invention discloses a gap-controllable retainer and a frictional resistance measuring method thereof, belongs to the technical field of mechanical equipment manufacturing, and solves the problem that an existing device can only test a retainer with a fixed gap and cannot simulate the influence of dynamic gap change on bearing performance. The retainer capable of controlling the gap comprises a retainer body capable of adjusting the gap between the retainer body and a rolling body, a retainer moving assembly and a gap adjusting part. The gap adjusting part comprises an adjusting motor, an eccentric wheel and a motor fixing frame. According to the retainer capable of controlling the gap, the gap between the retainer and a rolling body can be dynamically adjusted, the retainer can be matched with different types of ball-disc testing machines (rotary type and linear contact type) for friction resistance measurement, the gap between the rolling body and a pocket of the retainer can be flexibly adjusted by adjusting the motor and the eccentric wheel, and the friction resistance of the rolling body is measured. And therefore, the retainer main body can meet the retaining and limiting requirements of different working conditions and different types of bearings, and the performance, the service life and the reliability of the bearings are remarkably improved.

The invention discloses high-efficiency motor iron core laminating equipment which comprises a base, a support fixedly mounted at the top of the base, a top plate fixedly mounted at the top of the support, an air cylinder mounted at the top of the top plate, a punch structure mounted on an output shaft of the air cylinder, and a stepping motor mounted in the center of the inner wall of the base. A rotating shaft is mounted on an output shaft of the stepping motor, and the rotating shaft and the base are rotationally mounted through a bearing; and the stamping disc is rotationally installed at the top of the base, a groove is formed in the bottom of the stamping disc, and the inner wall of the groove and the top of the rotating shaft are fixedly installed. According to the device, through three core technologies of electromagnetic-mechanical composite driving, a multi-stage buffer structure and precise rotation positioning, the positioning repetition precision, the controllable damping characteristic of the magnetorheological fluid damper and closed-loop control formed by a pressure sensing feedback system, the lamination quality consistency is remarkably improved, electromagnetic limiting and electromagnetic stripping of a motor iron core are facilitated, and the production efficiency is improved. The use effect is good and the efficiency is high.

The invention relates to a hydroelectric main shaft all-condition simulation test system and method, and the system comprises a fixed rack, one side of the fixed rack is provided with a tripping starting detection device, the fixed rack is provided with a hollow three-axis platform, a three-axis excitation system and a rotation driving part, the moving end of the three-axis platform is connected with a hollow floating rack, and a bearing is disposed in the floating rack. The rotation driving part comprises a power part and a main shaft connected to the torque output end of the power part, the main shaft is in transmission connection with the rotating disc, a hydroelectric large shaft used for a simulation test is installed on the rotating disc, and the three-shaft excitation system is used for applying X-direction, Y-direction and Z-direction high-frequency sine excitation loads to the hydroelectric large shaft of the rotating disc. The device is used for overcoming the defects that an existing testing device mainly focuses on vibration loading of a static mechanical device, simulation and performance testing cannot be carried out on dynamic behaviors under the composite working conditions of rotation, vibration and impact of a hydroelectric large shaft, and safety testing and rating cannot be carried out on a hydroelectric generating set sensor and a tripper overspeed protection device.

The utility model relates to the technical field of ship mechanical part machining, in particular to a polishing device for ship mechanical part machining, and solves the problem that in the prior art, ship mechanical parts of different shapes and sizes cannot be conveniently adjusted and fixed, so that the polishing effect is poor. A polishing device for ship mechanical part machining comprises a machining table and a polishing machine, the machining table is provided with a sliding groove, the interior of the sliding groove is slidably connected with a mounting block, the top of the mounting block is provided with a bearing plate through a buffering mechanism, the surface of the bearing plate is fixedly connected with four supporting blocks, and the surfaces of the supporting blocks are in threaded connection with screws; a clamping drill is fixedly connected to the surface of the screw rod, a plurality of limiting grooves are formed in the surface of the bearing plate, and limiting rods are arranged in the limiting grooves in a penetrating mode. According to the polishing fixture, clamping and fixing of parts with different shapes and sizes are guaranteed, so that the parts can be normally polished, and the polishing effect of the parts cannot be affected.

The invention relates to an underwater stirrer and an underwater glue injection system. The underwater stirrer comprises a driving motor, a stirring barrel, a transmission shaft, blades and a bearing seat, the stirring barrel comprises a barrel body and a cover body used for sealing the barrel body, an avoiding hole is formed in the cover body, one end of the transmission shaft is connected with an output shaft of the driving motor, the other end of the transmission shaft penetrates through the avoiding hole and extends into the barrel body, and a mechanical seal is arranged between the transmission shaft and the cover body. The paddle is connected with the transmission shaft and is positioned in the stirring barrel, the bearing seat is sleeved outside the transmission shaft, one end of the bearing seat is hermetically connected with the cover body, a first sealing element is arranged between the bearing seat and the cover body, the other end of the bearing seat is hermetically connected with the driving motor, and a second sealing element is arranged between the bearing seat and the driving motor. The underwater stirrer is more suitable for underwater construction environments.

The invention relates to a die for manufacturing a high-hardness pipe plug wire and a die forging process, and belongs to the technical field of forging and pressing devices. A die for manufacturing a high-hardness pipe plug wire is characterized in that a double-guide-rod linkage trapezoidal plate and a rack mechanism are arranged, and a material taking arm is driven to rotate in one direction to complete discharging; an electromagnet is used for controlling the clamping arm to cooperate with a spring to reset to realize automatic feeding; and a spring bearing disc is arranged in the base to realize ejection and resetting of the forged part. The die structure integrates automatic feeding of a conveying belt, double-magnet energy-saving clamping and a slope self-locking device, the manual intervention link is eliminated, and the problems of high-temperature burning and efficiency bottleneck are solved. The device is mainly used for metal pipe plug wire high-temperature die forging forming, and through the synergistic effect of mechanical linkage and electromagnetic control, the production safety and the automation level are remarkably improved.

The invention discloses an industrial robot assembly workstation, and belongs to the field of industrial robots. The industrial robot assembly workstation comprises a workbench, mechanical arms are installed on the two sides of the top of the workbench, and switching parts are installed at the ends of the two sets of mechanical arms; the number of the bearing tables is two, the bearing tables are fixed to the two sides of the workbench correspondingly, multiple sets of adsorption parts with different specifications are installed on the bearing table on one side, and cleaning parts with different specifications are installed on the bearing table on the other side; through cooperation of the two sets of mechanical arms and the adsorption pipes 43, different adsorption discs and dust suction pipes can be rapidly replaced according to the specifications of workpieces to be assembled, the applicability of the equipment is improved, and the assembling efficiency is ensured; and meanwhile, the surface of the workpiece can be comprehensively adsorbed and cleaned, the cleanliness of the surface of the workpiece is improved, the adverse effect of dust and impurities attached to the workpiece on assembly is reduced, and the assembly precision is ensured.

The invention provides a piston pin edge burr removing device, and relates to the technical field of piston pin machining, the piston pin edge burr removing device comprises a burr removing machine support, an outer support is fixedly mounted above the burr removing machine support, and a circulation driving part is fixedly connected to the front of the outer support; a rotating shaft of the circulating driving piece is rotationally provided with a circulating carrying wheel through a bearing and a support, the circulating carrying wheel is located in the outer support, and the two frame plates of the outer support are each fixedly connected with a workpiece driving piece; the piston pin end face burr treatment device further has the functions of batch storage, sequential feeding, automatic clamping and sequential discharging, manual or mechanical arm feeding, positioning and discharging are not needed for the piston pins, and the piston pin end face burr treatment device is suitable for batch burr treatment work of the piston pins; the problems that when workpieces are manually installed, the workpieces need to be sequentially installed and taken, operation is tedious, and the device is not suitable for large-batch piston pin edge burr treatment are solved.

The mechanical arm comprises a movable platform, a static platform and a branch chain installed between the static platform and the movable platform, the branch chain comprises a branch chain body, a first rotating shaft and a second rotating shaft, and the first rotating shaft and the second rotating shaft are arranged on the two sides of the branch chain body respectively. A driving assembly used for driving the branched chain to rotate is arranged on the static platform, the driving assembly comprises a driving assembly body rotatably arranged on the static platform, a first bearing seat and a second bearing seat are arranged on the driving assembly body, the first bearing seat is rotatably connected with a first rotating shaft of the branched chain, and the second bearing seat is rotatably connected with a second rotating shaft of the branched chain. And the second bearing seat is rotatably connected with the second rotating shaft of the branched chain. The surgical robot comprises the mechanical arm. The two bearing seats and the two bearing assemblies are designed for the single branch chain, rotation support is provided for the two rotating shafts located on the two sides of the branch chain, and the rotation stability of the branch chain is guaranteed.

The invention discloses a solid rocket engine bearing structure lightweight determination method based on a carbon fiber composite material, and relates to the technical field of composite material structure design, and the method comprises the steps: obtaining the structure size and geometric shape of a fixed body; replacing a titanium alloy material with a carbon fiber composite material, and determining a carbon fiber composite material structure response model based on a finite element modeling method; determining an optimal layering scheme based on structural response sensitivity analysis and a multi-objective optimization method; then determining a thickness optimization scheme based on the structural size and geometric shape of the fixed body and load distribution; determining a reinforcement optimization scheme based on a parametric modeling method; determining a metal reinforcement configuration by adopting a structural rigidity-quality collaborative evaluation method; and finally, determining a lightweight structure of the fixed body based on a composite material layering process design method. The mass of the fixing body structure can be reduced, the mechanical property of the fixing body structure is improved, and the high-performance design requirement of a solid rocket engine is met.

The invention discloses a five-axis direct-drive swing head C-axis rotation limiting mechanism, and relates to the technical field of direct-drive swing head C. The five-axis direct-drive swing head C-axis rotation limiting mechanism comprises a base, a workbench is fixedly connected to the upper surface of the base, two gantry stand columns are fixedly connected to the top of the base, and a horizontal moving module is fixedly connected between the two gantry stand columns. Rotation of the direct-drive swing head box can be limited by matching the two limiting plates with the limiting block, the rotation angle of the direct-drive swing head box is forcibly limited within a design threshold value, overtravel caused by out-of-control of a motor, program errors or transmission faults is avoided, tooth breakage and breakage of core components such as gears and bearings due to excessive loads are prevented, the risk of mechanical damage is reduced from the source, and the service life of the direct-drive swing head box is prolonged. In addition, the number of rotation turns can be strictly controlled through fixed limiting, breakage and short circuit caused by excessive winding, stretching or twisting of the pipeline are avoided, the operation safety is improved, and meanwhile the situation that electric control limiting fails can be avoided by limiting the direct-drive swing head box only in a mechanical mode.

The invention relates to the technical field of mechanical engineering, in particular to a reciprocating type vertical lifting device.Two stand columns are fixedly connected to the top of a rail car, ejector rods are fixedly connected to the tops of the stand columns, a dynamic lifting mechanism is fixedly connected to the side faces of the stand columns, and a fixed side plate is arranged in the middle of the dynamic lifting mechanism; winding drums are arranged on the side faces of the two sides of the fixing side plate, a bearing mechanism is arranged in the middles of the two stand columns, a bearing table is arranged in the middle of the bearing mechanism, a balance mechanism is arranged at the bottom of the bearing mechanism, a balance base is arranged in the middle of the balance mechanism, and a balancing weight fixing base is arranged at the bottom of the balance base; a deceleration block is arranged on the side face of the balance mechanism, capsizing moment generated by goods deviation and position is counteracted, the deviation problem of the bearing mechanism is solved, friction between the bearing mechanism and the stand column guide rail is reduced, the stress of the root of the stand column is reduced, and the maintenance period is prolonged.

The invention relates to the technical field of wind turbine generator system fault diagnosis, and discloses a wind turbine generator system gear box output end bearing comprehensive diagnosis method based on multi-model collaboration, and the method comprises the steps: predicting the bearing temperature trend through a dynamic power-bearing temperature model, and carrying out the temperature early warning through a power-temperature difference model; confidence calculation is carried out in cooperation with multi-dimensional data such as mechanical vibration characteristics (time domain / frequency domain impact energy reflects bearing mechanical damage), bearing temperature trend and temperature difference analysis (eliminating environment and load interference to position real fault temperature rise), and mechanical faults such as roller peeling and inner ring cracks and operation faults such as heat dissipation failure can be distinguished; and a traditional'single-point alarm 'mode is broken through, a'root analysis-unit power reduction / trigger shutdown' whole-process closed loop is constructed, and the safety, reliability and operation and maintenance efficiency of unit operation are remarkably improved.

The invention discloses a vibration analysis method, device, medium and equipment for a vehicle electric driving system, and relates to the technical field of electric digital data processing, and the method comprises the steps: analyzing excitation characteristics and gear engagement dynamic load parameters based on a motor electromagnetic excitation and gear system dynamics model, and taking the excitation characteristics and the gear engagement dynamic load parameters as a mechanical excitation coupling motor, gear, bearing and shell model; according to the method, a rigid-flexible coupling dynamic model is formed, after the rigid-flexible coupling dynamic model is converted into a state-space equation, multivariable time-domain data are obtained through nondimensionalization and piecewise linear method solving, and then the transmission efficiency value of vibration energy among a motor, a gear, a bearing and all parts of a shell is calculated based on excitation characteristic parameters, gear meshing dynamic load parameters and the multivariable time-domain data. And positioning a key noise transmission path of the vehicle electric driving system according to the transmission efficiency value. By comprehensively analyzing the vibration characteristics of the system, the NVH problem of high-frequency howling and the like under the high-speed working condition is effectively solved.

The invention discloses a deep learning method for realizing mechanical fault diagnosis, and belongs to the technical field of intelligent manufacturing fault prediction and diagnosis. Aiming at the problem that the diagnosis precision is sharply reduced along with the improvement of noise due to insufficient front-end feature extraction and mutual superposition of time domain limitation of a self-attention mechanism, a fault diagnosis classification model composed of three levels of feature processing layers is constructed; each stage comprises a wavelet-guided adaptive multi-scale convolution module and a frequency domain enhanced self-attention module; the wavelet-guided adaptive multi-scale convolution module can extract abundant multi-scale features under high noise; the frequency domain enhanced self-attention module carries out global modeling in the frequency domain, and the influence of noise on the overall recognition precision is reduced. The method has strong multi-scale feature extraction capability and anti-noise interference capability, effectively solves the problem of inaccurate diagnosis precision caused by a high-noise environment under an actual industrial condition, and is suitable for fault diagnosis of rotating mechanical equipment such as bearings and gears.

The invention relates to the technical field of numerical control machine tool control, and discloses a numerical control rotary table precision compensation method and system based on digital twinning. The method comprises the following steps: constructing a digital twin model of the numerical control rotary table for simulating a deformation behavior under a thermal-mechanical coupling effect; multi-source physical field sensing data such as bearing temperature, servo motor current and rotary table angular displacement are collected in real time; the digital twin model is driven by the sensing data to perform thermal-mechanical coupling simulation, and a comprehensive error prediction value is obtained; generating a compensation trigger signal based on a comparison result of the error prediction value and a preset threshold value; in response to the trigger signal, generating an axis motion feed-forward compensation instruction through inverse kinematics calculation; and the compensation instruction and the original machining instruction are executed after being superposed. Dynamic prediction and active compensation of the precision of the numerical control rotary table are achieved, and the machining precision and stability are effectively improved.