61 results about "Force displacement" patented technology

The invention discloses a control method and system of a servo press, and relates to the field of press control, a force displacement curve is obtained in real time from a current punching period, a key feature vector of the force displacement curve is extracted, the key feature vector is compared with an ideal golden feature vector, and a multi-dimensional deviation vector is obtained. Particularly, a deviation decoupling method based on morphological analysis is introduced, and the total deviation can be accurately decomposed into a thermal drift compensation amount caused by the thermal effect of equipment and a material characteristic compensation coefficient caused by plate performance fluctuation by analyzing translation and zooming differences of a current curve and a gold curve in form. Therefore, independent and accurate compensation can be carried out for a physical source, the problems of information aliasing and compensation failure caused by the fact that disturbance sources cannot be distinguished in the prior art are effectively solved, intelligent and feed-forward type cooperative compensation for the next stamping period is achieved, and long-term stability and high precision of the production process are ensured.

The invention belongs to the technical field of bridge construction, and particularly relates to a single-point multiple-jack synchronous beam falling forced displacement method prestress applying method which comprises the steps that S1, a plurality of temporary supporting points are arranged beside a permanent support, and a self-locking type beam bearing mechanism is installed on each temporary supporting point; meanwhile, a hydraulic jack is arranged at each temporary supporting point, the multiple hydraulic jacks are connected to a PLC integrated hydraulic synchronous control system through hydraulic pipelines, and synchronous linkage mechanisms are arranged among the multiple hydraulic jacks. According to the single-point multiple-jack synchronous beam falling forced displacement method prestress applying method, when an inner jacking pipe sleeve pushes a supporting cushion block to ascend and descend, through meshing of a self-locking gear and two self-locking racks, a secondary telescopic block can be forcibly driven to move synchronously, so that continuous stretching and retracting of a bearing beam are achieved, the cushion block does not need to be manually replaced after single beam falling, and the working efficiency is improved. The system automatically adjusts the height to meet the multi-stroke circulating beam falling requirement, and the construction efficiency is improved.

The invention relates to the technical field of material mechanical property testing, and discloses a composite steel wire tension test method which comprises the following steps: executing a micro-unloading and reloading action at each increment end point of stepping loading, and synchronously calculating to obtain instantaneous system rigidity Ki, dissipated energy Wd and system rigidity change rate K based on force displacement data of the action, according to the method, through a set of built-in judgment rules, firstly, the K value is used for filtering measurement artifacts generated by slippage of the clamp, then the damage inflection point is identified according to irreversible decline of the Ki value, and the physical property of the damage is discriminated in combination with two-dimensional state data of Ki and Wd, so that the traditional one-way destructive test is changed into the traditional one-way destructive test. The method is converted into a staged failure analysis process capable of performing online diagnosis, and provides a direct physical observation window for distinguishing functional damage and structural damage of the material, so that the depth and credibility of information acquisition of the tension test are improved.

The invention discloses a side face direct-insertion wiring terminal block structure and an elastic piece simulation design method of the side face direct-insertion wiring terminal block structure. Comprising an insulating shell, a conducting strip, a first elastic piece, a second elastic piece and a push block abutting against the elastic pieces, a wire can be inserted along the side face and clamped by a wire clamping block, and electricity conduction and disengagement prevention are achieved; the elastic piece is made of a metal material with resilience, and the elastic piece is bent to form a mounting part and a camber beam structure so as to provide stable clamping force. In order to optimize the performance of the elastic sheet, a simulation design method is adopted to establish an elastic sheet finite element model, set material attributes and constraint and loading conditions, carry out mesh refinement on a bending area and a wire clamping opening, start large deformation analysis and draw a force-displacement curve, so that the equivalent stiffness, the maximum stress and the deformation of the elastic sheet are obtained. Through simulation comparison of different design schemes, the optimal structure meeting the strength and resilience requirements can be determined. According to the invention, the stable conduction of the side plugging terminal and the predictable design of the performance of the elastic sheet are realized, and the assembly reliability and the design efficiency are improved.

The invention relates to the technical field of automation equipment, and discloses an automatic welding product strength detection device, system and method, and the method comprises the steps: 1, placing a product on a platform, obtaining the type and appearance data of the product, and calculating the optimal clamping point coordinate and the normal vector angle; obtaining process parameters of the product; 2, a chuck is controlled to clamp the product according to the clamping points, and the contact force of the chuck is judged; when the contact force is met, the chuck is controlled to be pulled up, pulling-up data are collected, and a force-displacement curve is formed; 3, in the pulling-up process, the standard reaching condition is judged according to double conditions; if not, comprehensively judging the quality of the welded product in combination with a failure mode, and outputting a judgment result; and 4, performing feature extraction on the generated curve, analyzing the process flow according to the features, and providing a process adjustment suggestion. According to the method, the detection precision is improved, the data use value is improved, the false detection rate and the omission ratio are effectively reduced, and the overall detection efficiency is improved.

The invention discloses an in-situ force-displacement measuring device and method for a soft material, and belongs to the technical field of material mechanical property testing. The device comprises a base, three spherical supports symmetrically arranged on the base, a carrying disc carried on the spherical supports, and a weight set for applying a vertical load to the carrying disc. The top of the spherical support is coated with dye, and transfer paper is laid on the surface of the tested soft material; under the action of load, the ball body is pressed into the soft material to generate indentations, and the dye is transferred to the paper to form a dyeing area; the area or the equivalent diameter of a dyeing area is obtained through an image acquisition system, and a mapping relation between the area or the equivalent diameter and actual displacement is established in combination with a calibration curve, so that force-displacement response is indirectly obtained. The image processing comprises the sub-steps of preprocessing, binaryzation, morphological operation, connected domain analysis and the like. The calibration curve is established through fitting (u = a.Ab) of a displacement sensor and a power function. The device is simple in structure, low in cost and suitable for rapid and in-situ mechanical property screening and comparison testing of materials such as soft cushions and foam.

The invention relates to the technical field of hardness testing, and particularly discloses a badminton racket shaft hardness testing device which comprises a supporting table, a vertical plate, a detection unit, a loading mechanism and a clamping mechanism. The vertical plate is fixed on one side of the support table and is embedded with the detection unit, the top of the vertical plate locks the loading mechanism, and the clamping mechanism is mounted on the other side of the support table. The loading mechanism is used for converting rotary motion into stable and vertical linear loading motion of a pressure head through a transmission system consisting of a motor, a cam piece, an L-shaped pressure rod, a connecting rod and a precise guide pair; the clamping mechanism drives connecting rod amplifying mechanisms which are symmetrically arranged through an air cylinder, so that an upper pressing frame and a lower pressing frame synchronously move to stably clamp the racket handle. A displacement and force sensing module integrated in the detection unit collects data in real time, and an internal data processing module automatically draws a force-displacement curve and calculates a hardness value or an elastic modulus. The device realizes high precision and high efficiency of the hardness test of the racket rod, and has the advantages of high universality, convenience in operation and objective and reliable result.

The application discloses an intelligent lighter plugboard device based on visual identification, aiming at overcoming the space interference of horizontal displacement and longitudinal conveying in the same plane in the plugboard operation, and the complicated linkage arrangement and collision risk caused by the independent external driving avoidance of the blocking material during the multi-layer switching. The device comprises a main frame and a conveyor, the side of the conveyor is provided with a forced elastic ejection channel with a block and a spring, and the physical blockage of the side of the channel is removed by the single one-way extrusion mechanical removal when the defective products are horizontally pushed. The push station is provided with a self-adaptive avoidance assembly, the contact arc convexity of the pushed material drives the horizontal sliding of the baffle, removes the physical support below the sliding block, and completes the mechanical transmission from the horizontal pushing force to the vertical retreat stroke. After the full disc, the connecting plate with a chute is transversely moved, and the slope surface forcibly lifts the reset full-column blocking material component. The device relies on a single-point forced displacement structure and a three-axis orthogonal sliding table frame to sort out the space avoidance action sequence in the multi-layer alternating operation.

The invention relates to the technical field of tire detection, in particular to a laboratory method, a system, a storage medium and a software product for evaluating the impact resistance of a passenger car tire. According to the method, on an existing tire strength testing machine, force-displacement data real-time collection and curve fitting in the tire pressing process are achieved by installing a standard wedge block and integrating a high-speed data collection system, and the minimum damage energy and the impact resistance factor are calculated. The device adopts a modular design, is convenient to disassemble and assemble quickly, has multiple shutdown criteria, and ensures that the test is safe and reliable. The device can truly simulate the stress condition when the tire impacts the curb, is accurate in test result and good in repeatability, and is suitable for tire research and development and quality evaluation.

The invention relates to a force-displacement measuring platform for testing a mass capturing mechanism, and belongs to the technical field of spaceflight. According to the measuring mechanism, a nut is rotationally connected with a supporting seat, the nut is in threaded connection with a lead screw, the nut is connected with a second encoder, and the nut is connected with an adapter shaft; the output end of the motor and the first encoder are connected with the adapter shaft, the motor is connected with the supporting seat, and the motor is connected with the first encoder; the sensor is connected with the supporting seat and is arranged corresponding to the tested piece; and the lead screw is connected with the tested piece and the load mechanism. The disc spring and the screw are designed, so that the influence of different nut pre-tightening forces on the reciprocating motion precision of the capturing mechanism can be explored. The adjusting mode is simple and fast. The reciprocating motion precision of the capturing mechanism under different loads is studied by changing the weight of the balancing weight. The rotation angle of the motor and the rotation angle of the split nut can be measured at the same time, and measurement of the assembly clearance on the reciprocating motion precision of the capturing mechanism is explored.

Device and method for determining a property, in particular a viscosity or compressibility, of a fluid, in particular a functional fluid, of a component (102), in particular a viscosity or compressibility, wherein measurement data characterizing an operating characteristic of the component (102), in particular a power and / or a rotational speed of a pump with which the fluid is pumped, and / or a displacement of a hydraulic cylinder driven by the fluid, are acquired (206), wherein, depending on the acquired measurement data, a characteristic parameter for the function of the component (102), in particular a power signal and / or a force-displacement characteristic curve, is determined (208), wherein the property is determined depending on a result of a comparison between the determined characteristic parameter and a predetermined characteristic parameter for the function of the component (102).in particular a given power signal and / or a given force-displacement characteristic, is determined (210).

The invention discloses a force-displacement synchronous introspection sensing method for the tail end of an electrothermal micro-actuator, and the method comprises the steps: defining a physical input variable and an output variable of a state space model of the electrothermal micro-actuator, and selecting an intermediate variable which can be directly or indirectly measured as a state variable; constructing a nonlinear state equation and a nonlinear output equation, and selectively adding nonlinear terms; reasonable driving voltage excitation signals and tail end load force excitation signals are selected, and data of input variables, output variables and state variables responded in the whole process are synchronously collected; performing parameter identification on the nonlinear state space model by adopting a nonlinear dynamic sparse identification algorithm to obtain a continuous time state equation and an output equation of the system; and converting the continuous time state equation and the output equation into a discrete time state equation and a discrete time output equation, and synchronously estimating the loading force and the output displacement of the tail end of the micro-actuator on line by using state variable data and driving voltage data which are acquired in real time.

The invention discloses a flexible supporting device for a GIL product, and the device comprises supporting cantilevers, the supporting cantilevers are grouped in pairs and are arranged at intervals, and a to-be-connected GIL product is arranged between the supporting cantilevers in a penetrating manner; the two combined dampers are fixedly arranged on the top sides of the supporting cantilevers in a one-to-one correspondence mode. The transition force transmission supporting piece is used for connecting the GIL product and the combined damper, and based on the combined damper, instantaneous energy caused by the vertical earthquake vibration acceleration to the GIL product can be absorbed, and forced displacement introduced by the vertical earthquake vibration acceleration to the GIL product is reduced. The force balance buffering assembly is arranged between the cantilever ends of the two sets of supporting cantilevers and conducts horizontal buffering control on the supporting cantilevers, and the force balance buffering assembly can absorb instantaneous energy caused by horizontal seismic vibration acceleration to the GIL product and reduce forced displacement introduced by transverse seismic vibration acceleration to the GIL product. The GIL connector is suitable for connection of GIL products in a complex environment, and the connection reliability is high.

The invention discloses an in-service ductile bridge anti-beam-falling function improving method and an in-service ductile bridge anti-beam-falling device, relates to the technical field of in-service highway bridge anti-seismic property reinforcement and transformation, and provides a method for solving the problems that in-service ductile bridge anti-beam-falling device type selection and parameter determination depend on experience, a system method is lacked, and multi-level performance controllability is difficult to achieve. Comprising the steps of anti-seismic performance evaluation, multi-level fortification standard setting, problem judgment, device model selection and parameter calculation optimization, and by establishing a parallel constraint system of a support and an anti-falling beam device and a series model of the support and a pier, the lateral stiffness requirement is deduced based on force-displacement coordination; the lateral stiffness of the anti-falling beam device is calculated according to E1, moderate earthquake and E2 levels in a grading mode, the maximum value is taken, parameters are iteratively optimized through nonlinear time-history analysis, it is ensured that the damage control target is met, and the method is used for improving the anti-seismic performance of a bridge and preventing support sliding, main beam deviation displacement and falling beam earthquake damage.

The present invention discloses a force-displacement correction method for an instrumented impact test. The contact flexibility of the hammer blade and the specimen is obtained by the finite element method; a force-applying device and a laser interferometer are used to measure the flexibility of the anvil; an instrumented Charpy pendulum impact test is performed on a standard V-shaped impact specimen according to the standard, and force data during the pendulum impact on the specimen is obtained during the test. The deformation of the anvil and the hammer blade is corrected; based on the calculated corrected data, the force-displacement curve obtained from the instrumented impact test is redrawn. The method proposes an expression formula for contact flexibility, and obtains the specific parameters in this formula based on the finite element method. Based on this, the displacement error caused by the deformation of the hammer blade during the impact process is corrected; compared with the traditional method of treating the anvil and hammer blade as absolute rigid bodies, the present invention treats the hammer blade and anvil as elastic bodies, which is closer to the actual situation in principle, and the corrected data is more scientific and reasonable.

This invention discloses a sliding hinge support and construction method for a prefabricated staircase, relating to the field of prefabricated building construction technology. It involves setting up multiple guide components, multiple infill bodies, a sliding mechanism, and a shock-absorbing mechanism, so that the upper and lower ends of the prefabricated staircase are both supported on an external load-bearing beam. The guide components pass through sliding holes and extend into the infill space, and the top of the guide components is fixed to the prefabricated staircase by the infill bodies. The prefabricated staircase is not rigidly welded or bolted to the load-bearing beam, but rather a sliding surface composed of sliding components is provided. The prefabricated staircase can then slide horizontally with a low coefficient of friction relative to the infill components (i.e., relative to the external load-bearing beam) through the sliding medium layer in the sliding components. This relative sliding displacement releases the deformation constraints at the connection nodes, avoiding stress concentration at the nodes caused by forced displacement. The sliding stroke provided by the sliding components effectively absorbs inter-story displacement, protecting the main structure of the prefabricated staircase and the connection nodes from damage.

The invention relates to the technical field of automatic simulation, and discloses a two-force rod buckling automatic simulation method, device and equipment and a medium, and the method comprises the steps: numbering nodes in a two-force rod model, and obtaining rigid node numbers of numbered rigid connection units; determining an active point in the rigid connection unit according to the rigid node number, and determining a constraint end and a loading end based on the global coordinate value of the active point; the constraint end number of the constraint end and the loading end number of the loading end are associated with a local coordinate system number of a preset local coordinate system, constraint conditions are applied to the constraint end, forced displacement is applied to the loading end, and simulation solving is carried out; and according to a simulation result after simulation solution, determining a buckling value and a corresponding displacement value, and obtaining a bearing reaction-displacement curve of a marked buckling point so as to automatically identify a critical point of buckling occurrence. According to the technical scheme, the working efficiency and precision of two-force rod buckling simulation can be improved, and human errors are reduced.

The invention discloses a multidirectional self-adaptive precise clamping control system and a using method thereof. Relates to the technical field of dense manufacturing workpiece clamping control and comprises a workbench provided with a first multi-shaft synchronous driving module, a first strip-shaped hole is formed in the top of the workbench, a first fixing sleeve is arranged in the first strip-shaped hole, an extrusion block is arranged on the first fixing sleeve, and first clamping plates are arranged on the opposite side walls of the extrusion block; the first fixing sleeves are arranged on the force displacement coupling controller in a sleeving mode, the force displacement coupling controller is connected with the first multi-shaft synchronous driving module, sleeves are arranged on the two sides of the extrusion block, telescopic plates are arranged in the sleeves in a sleeving mode, screw rods are arranged on the telescopic plates, knobs are arranged at the ends, close to the extrusion block, of the screw rods, and bearing seats are arranged at the other ends of the screw rods. A second clamping plate is arranged on the bearing seat; the lateral clamping mechanism is arranged on the sides, away from each other, of the extrusion blocks. According to the multi-directional self-adaptive precise clamping control system and the using method thereof, multi-directional surrounding clamping is achieved, and the problem of uneven stress is solved.

The present application relates to the technical field of bridge engineering, and provides a load-deformation determination method and system for a precast pier under compression-bending-shear-torsion action, which comprises determination of stage division and analysis assumption of a torsion moment-angle analysis model and a shear force-displacement analysis model of the precast pier under compression-bending-shear-torsion action; based on concrete mechanics parameters, a spatial truss model, the principle of virtual work and force balance, critical point calculation formulas of each stage of the two models are respectively established, and each model is simplified into a complete curve of the critical point connecting line; precast piers with different parameters are selected, the load-deformation analysis model is used to calculate the torsion moment-angle curve and the force-displacement curve, and comparison and verification are made with the test curve. The present application comprehensively considers the stiffness attenuation, crack development and deformation formation of each stress stage of the precast pier, can accurately reflect the dynamic relationship between the load and the deformation, and realizes accurate prediction of the change rule of the lateral force and the torsion moment of the precast pier with the loading displacement and the angle under compression-bending-shear-torsion load.

The invention discloses a spectrum load impact fatigue test device and a control method, the spectrum load impact fatigue test device comprises a tested structure, a driving unit, an impact head and a detection and control system, an industrial personal computer of the detection and control system is in communication connection with a PID controller, the PID controller is electrically connected with an electro-hydraulic servo valve, a force sensor and a displacement sensor, and the electro-hydraulic servo valve, the force sensor and the displacement sensor are electrically connected with the detection and control system. The electro-hydraulic servo valve is connected into an oil path of the hydraulic actuator; and a displacement sensor and a force sensor are mounted at the end part of the actuator rod. Through two modes of displacement control and force displacement fusion, different fatigue working conditions are flexibly adapted, especially load deviation caused by stiffness attenuation of the elastic assembly is adaptively compensated, and closed-loop feedback control ensures accuracy and repeatability of test data, so that engineering credibility of fatigue strength evaluation of the elastic assembly is improved; and the high-frequency large-stroke mechanical shock of the crank connecting rod mechanism is combined with the dynamic compensation of the hydraulic servo system, so that the time history waveform of the random continuous spectrum load can be automatically and accurately reproduced in real time.

The invention belongs to the technical field of pipeline structure strength analysis and plastic energy absorption structure design, and particularly relates to a method for correcting plastic damage deformation of a pipeline. The invention provides a method for correcting plastic damage deformation of a pipeline, which comprises the following steps of: further dividing a partial region into a rigid section and a residual plastic region, and continuously correcting the size of the rigid section through comparison before and after curvature to obtain a force-displacement response curve; and finally, through a finite element verification method combining a J2 plastic deformation full-amount constitutive model considering a large deformation effect and a rigid region judgment step under a one-time unloading hypothesis, and a compilation method of a corresponding Abaqus user-defined subprogram UMAT, accurate calculation of a crushing global force-displacement response curve of the cross section of the pipeline on an upper flat plate and a lower flat plate can be realized, and the accuracy of the pipeline cross section is improved. And safety evaluation and damage evaluation of the pipeline structure are realized.

This invention discloses a separate variable-frequency, variable-friction-coefficient friction pendulum support and a method for achieving diverse hysteresis characteristics. The friction pendulum support includes a lower structure and an upper structure. A circular spherical slide and an annular curved slide are fixedly mounted on the lower support plate of the lower structure, and the circular spherical slide and the annular curved slide are concentric. A central support leg is located at the center of the lower side of the upper support plate of the upper structure, and a slightly movable hinged slider is embedded at the bottom of the central support leg. An outer hollow conical support platform, concentric with the central support leg, is also fixed to the lower side of the upper support plate. A segmented slider connected in series with steel rings is embedded at the bottom of the hollow conical support platform. The segmented slider can rotate slightly on the steel rings to adaptively conform to the sliding surface of the slide. This invention allows for flexible design of the sliding frequency and friction force of the friction pendulum support; it can meet the wind and seismic resistance design requirements under different levels; and by adjusting the radius of the sliding surface and the friction coefficient, diverse hysteresis characteristics can be achieved in the force-displacement relationship curve.

The invention provides a method for constructing a static model of a lathe tailstock based on a slip working condition. The method comprises the steps that the maximum axial friction force of a sleeve under the action of a clamping mechanism is calculated; whether the external load borne by the tip component is larger than the maximum axial static friction force or not is judged; under the condition that the external load is large, a statics model of the lathe tailstock is established; the model at least comprises force-displacement functions of a sleeve-tip joint surface, a tailstock body-lathe bed guide rail joint surface, a lead screw shaft-nut pair joint surface, a thrust bearing and a lead screw shaft; all parts in the tailstock only generate elastic deformation, and the load is sequentially transmitted along the external load, the center, the center-sleeve junction surface, the sleeve, the lead screw shaft-nut pair junction surface, the lead screw shaft, the thrust bearing, the tailstock body, the tailstock body-lathe bed guide rail junction surface and the lathe bed. According to the method, the exclusive statics model containing the full-load transmission path is established for the slippage working condition, mechanical response changes caused by slippage are accurately quantified, and the defect that a traditional model path is incomplete is overcome.

Operating device for a motor vehicle, comprising a carrier (21), an operating element (22) which is displaceable on the carrier (21) in an actuation direction (B) from a rest position to an actuation position, and a magnetic operating haptic device (28) which is operatively connected to the operating element (22) such that, in the event of a displacement of the operating element (22) between the rest position and the actuation position caused by a load on the operating element (22) by a person, a counterforce acts in accordance with a predefined force-displacement characteristic, wherein the operating haptic device (28) comprises a first magnetic unit (30) and a second magnetic unit (40), wherein the first magnetic unit (30) is configured to load the operating element (22) against the actuation direction (B), and the second magnetic unit (40) is configured to load the operating element (22) in the actuation direction (B).

The method comprises the following steps: establishing a geometric model according to an off-axis tensile sample of the thermoplastic fabric prepreg, partitioning the geometric model into five regions in the thickness direction of the geometric model, and respectively endowing the five regions with performance parameters of corresponding materials; constraint is applied to the established geometric model; setting a predefined temperature field for the thermoplastic resin matrix layer in the geometric model; meshing the geometric model into a plurality of units; simulating in-plane shear deformation behaviors of the thermoplastic fabric prepreg at different temperatures, and extracting a force-displacement curve of the model in result output; performing off-axis tensile experiments on the thermoplastic fabric prepreg at different temperatures; and correcting and correcting parameters in the geometric model by using an experimental result. The method can accurately predict the in-plane shear deformation behavior of the thermoplastic fabric prepreg at different temperatures and strain rates, and can be used for predicting and analyzing the deformation behavior and forming defect of the thermoplastic fabric composite material.

The present invention provides an apparatus and method capable of analyzing the influence of stress, which is a factor in the occurrence of springback, in a short time and with high accuracy. [Solution] A stress influence analysis device 10 comprises an acquisition unit 11 that acquires information on the shape, characteristics, and stress of a press-formed part after press forming and before springback (SB) occurs, information on the shape and characteristics of a press-formed part after SB occurs, and information on the stress of an analysis model after a forced displacement is applied to an analysis model generated based on the information on the shape and characteristics before or after SB occurs; and a calculation unit 12 that calculates the degree of influence of the stress in the press-formed part before SB occurs on SB based on the information on the stress of the press-formed part before SB occurs and the information on the stress of the analysis model after a forced displacement is applied, wherein the forced displacement is set based on the information on the shape of the press-formed part before and after SB occurs.

The invention discloses a rivet pressing deviation early warning method for crimping force displacement curve form discrimination, and relates to the field of industrial manufacturing process monitoring, and the method comprises the steps: collecting crimping force and displacement signals in real time to generate a crimping force-displacement time sequence curve, and extracting geometric form features and dynamic response features; constructing an independent time sequence for each feature based on feature data extracted by continuous preset times of crimping operation, and establishing a statistical process control reference for each feature sequence; monitoring the movement statistics of each feature sequence in real time, and when the movement statistics of any feature sequence meets a preset statistical trend anomaly judgment criterion, judging that the feature sequence has potential trend anomaly; and performing association analysis according to the feature sequence with the potential trend abnormality and the trend state of each feature sequence, and determining a fault mode according to a preset fault mode mapping rule. And through feature extraction and trend analysis, early and accurate early warning and root diagnosis of the voltage bias risk are realized.

The invention provides a press segmented closed track generation method based on consistency safety Bayesian optimization, and the method comprises the steps: extracting a compaction response and infiltration capacity parameter range under the upper limit constraint of a press through a force-displacement curve and an in-mold pressure signal which are obtained through one-time pressure test; establishing an extrusion flow and gas discharge combined calculation model under mould geometry and cavity boundary conditions, and determining displacement points when the edge sealing starts and finishes displacement and the central pressure reaches a drop threshold value; introducing the physical constraints into a scoring network, determining the speed and the residence time of each section in a trajectory parameter range by adopting secure Bayesian optimization, generating a target section closed trajectory which meets the condition that the central pressure is reduced to a threshold value before edge sealing and does not trigger the upper limit of equipment, and outputting a corresponding control instruction; according to the method, under the condition of considering material and working condition fluctuation, the exhaust reliability and the forming quality in the pressing forming process are improved, and takt time and equipment safety are both considered.