218 results about "Coupling vibration" patented technology

The invention relates to a dynamic precision compensation control method based on an intelligent PCB drilling machine, and the method comprises the steps: collecting a dynamic parameter set in real time through a multi-source sensor group disposed on a drilling main shaft, the dynamic parameter set comprises displacement deviation caused by axial deformation of a main shaft, thermal deformation analyzed based on interlayer temperature gradient and frequency spectrum characteristics reflecting tool-material coupling vibration, and according to the multi-dimensional compensation vector and current drilling process parameters, a space trajectory correction instruction and a motion parameter optimization instruction are dynamically synthesized, so that the dynamic parameter set is obtained. Wherein the trajectory correction instruction reconstructs a real-time interpolation path through a B-spline curve, the motion controller receives a space trajectory correction instruction and a motion parameter optimization instruction, at least three times of compensation iteration are completed in a single drilling period, a linear motor and a spindle motor are driven to execute online precision compensation, and the execution delay of the compensation instruction is smaller than 2 ms.

The invention discloses a multi-dimensional aeroelastic calculation method and device based on a nonlinear Euler-Bernoulli beam and a storage medium, and belongs to the technical field of wind turbine aerodynamics, the method comprises the following steps: inputting the stiffness of each section of a blade into a nonlinear Euler-Bernoulli beam equation to obtain a modal-displacement transformation matrix; the rigidity, the weight and the external force of each section of the blade are converted to obtain a generalized rigidity matrix, a generalized mass matrix and a generalized force; starting circulation, substituting into a forced coupling vibration equation, solving modal displacement of each order at the current moment, and inputting into a modal-displacement inverse transformation matrix to obtain blade displacement; the generalized force is substituted into a blade element momentum theoretical formula to solve aerodynamic force at the next moment, the generalized force is updated to obtain updated generalized force, and aerodynamic force at each moment is obtained; and calculating to obtain the multi-dimensional aerobomb. According to the method, the calculation of the blade deformation and the load considers the change of the torsional degree of freedom, and more accurate and more efficient load and deformation calculation can be carried out.

The invention belongs to the technical field of vibration control, and provides a CFD numerical simulation-based TMDI control bridge rigid main beam low-frequency vertical vortex vibration research method, which comprises the following steps of: establishing a rigid main beam-TMDI vertical coupling vibration equation in a wind field, carrying out order reduction processing on the coupling vibration equation by constructing a state equation, embedding a solving process into Fluent software by utilizing a user-defined function, and carrying out low-frequency vertical vortex vibration research on a rigid main beam-TMDI control bridge rigid main beam. And the vertical vortex-induced vibration response of the controlled main beam is obtained by alternately solving the flow field domain and the structural domain. Compared with a theoretical method, the fluid-solid coupling effect can be directly simulated, a vortex-induced force model does not need to be assumed, and the result is more reliable; compared with a wind tunnel test method, various parameters of the structure and the TMDI can be accurately set, physical space constraint is avoided, machining errors do not exist, the method is not limited to low wind speed, and the vibration suppression effect can be verified more conveniently; compared with an on-site actual measurement method, the method does not need to passively wait for vertical vortex vibration of a real bridge for a long time, can obtain richer information, facilitates the development of vibration suppression mechanism analysis, and greatly reduces the research difficulty and cost.

The invention provides a marine diesel engine shafting longitudinal-torsional coupling vibration calculation method. The method specifically comprises the following steps: S1, calculating crankshaft longitudinal-torsional coupling rigidity; s2, calculating torsional vibration excitation at the propeller by using a CFD method; s3, establishing a ship propulsion shafting coupling free vibration kinetic equation through the calculated longitudinal-torsional coupling stiffness; s4, calculating a longitudinal-torsional coupling inherent frequency and a vibration mode of the ship propulsion shafting through a coupling free vibration kinetic equation of the ship propulsion shafting; and S5, substituting the propeller excitation calculated in the step S2 into the ship propulsion shafting coupling forced vibration kinetic equation to calculate the longitudinal-torsional coupling forced vibration response of the ship propulsion shafting. According to the marine diesel engine shafting longitudinal-torsional coupling vibration calculation method, the crankshaft longitudinal-torsional coupling rigidity is calculated based on a material mechanical deformation energy method, and related exciting force considering the crankshaft longitudinal-torsional coupling effect is obtained by combining related formulas of marine diesel engine shafting dynamics; and finally, ship shafting longitudinal-torsional coupling vibration inherent characteristics and ship shafting longitudinal-torsional coupling forced vibration response are obtained through calculation.

The invention discloses a vibration noise analysis method for a combined box girder bridge with an axle coupling effect, and belongs to the technical field of bridge engineering. The method comprises the following steps: S1, establishing a train-track-bridge coupled vibration model of a high-speed railway steel-concrete combined box girder bridge, and compiling a train-track-bridge coupled vibration simulation analysis program based on a Matlab language and Ansys finite element software; s2, establishing a low-frequency noise prediction model in the steel-concrete combined box girder bridge of the high-speed railway, and obtaining a low-frequency noise radiation rule of a bridge structure; s3, establishing a medium-high noise prediction model of the steel-concrete combined box girder bridge of the high-speed railway, and performing numerical simulation on medium-high frequency radiation noise of a bridge structure; and S4, analyzing the influence parameters of the vibration noise of the steel-concrete combined box girder bridge of the high-speed railway in combination with the models established in the steps S1 to S3. The technical scheme is used for analyzing vibration and noise conditions of the steel-concrete composite beam applied to the field of railroad bridges.

The invention relates to the technical field of automobile glass film removal, in particular to a laser film removal control method and system based on dynamic environment compensation. The control method comprises the steps that a multi-source vibration monitoring network is constructed at key nodes of a galvanometer system base, a linear guide rail driving unit and a workpiece clamp of the laser film removing equipment, an original vibration signal set containing acceleration, angular speed and displacement is collected in real time through a three-axis acceleration sensor and a gyroscope set, and the sampling frequency is not lower than 10 kHz. According to the method, breakthrough improvement of curved surface laser processing is achieved through a full-link compensation mechanism, specifically, a three-axis sensor network is synchronously deployed at a motor flange, a lead screw bearing seat and a clamp interface, a differential anti-interference circuit is combined, coupling vibration characteristics of a mechanical transmission link are captured at the same time for the first time, and a data foundation is laid for accurate compensation.

The invention relates to the technical field of blade monitoring, in particular to a long flexible blade real-time monitoring and fault early warning method which comprises the steps that vibration signals of a long flexible blade in the running state are collected, and the vibration signals are subjected to the aerodynamic load, gravity and centrifugal force multi-factor coupling effect; constructing an overdetermined equation set containing a multi-source excitation characteristic based on the blade dynamic model; decomposing the vibration signal by adopting a sparse decomposition algorithm to obtain a signal decomposition result; based on the signal decomposition result, solving the overdetermined equation set to obtain modal parameters of each coupling vibration source; and determining a state monitoring result of the long flexible blade according to the modal parameters of the coupling vibration sources.

The invention relates to the technical field of hemispherical resonator gyroscopes, in particular to a method for reducing vibration coupling of a hemispherical resonator gyroscope, and aims to solve the problem that accurate vibration suppression is often difficult to realize when the HRG faces a complex and multi-frequency mixed vibration environment. Comprising the following steps: step 1, evaluating the frequency range, amplitude and directivity of an external vibration environment; 2, a vibration isolation module is installed to reduce transmission of external vibration; 2, analyzing external vibration characteristics of the hemispherical resonator gyroscope; 3, generating a compensation signal based on the vibration characteristics of the hemispherical resonator gyroscope, and compensating the vibration signal of the hemispherical resonator gyroscope in real time through a compensation system; and 4, debugging and optimizing a vibration isolation and compensation system. By adopting a vibration isolation and active compensation method, external vibration and internal structure coupling vibration are controlled, the interference of vibration coupling on the hemispherical resonator gyroscope is reduced, the performance of the hemispherical resonator gyroscope is improved, and the use requirements in high-precision navigation and complex environments are met.

The invention relates to the technical field of signal processing, in particular to a high-speed unmanned aerial vehicle structure servo elastic coupling vibration suppression control method, system and device, a medium and a program product. Obtaining a target control loop causing resonance; spectral analysis is carried out, and double-center frequencies causing resonance are obtained; a cascade wave trap with double center frequencies is designed; and the servo elastic coupling vibration of the unmanned aerial vehicle structure is suppressed. According to the method, the problems of difficulty in structure modification, narrow notch frequency range and large low-pass filtering delay of an existing structure servo elastic coupling resonance solving method are solved, the performance of a control system cannot be reduced, and the flight safety is ensured.

The invention discloses a fast and accurate identification method for counter-rotating double-rotor unbalanced coupling vibration of a paddle fan engine. An unbalanced coupling signal separation method based on double-rotor micro-speed-difference waveform envelope is combined with an automatic balancing technology. Based on the characteristic of vibration coupling of inner and outer rotors of a micro-speed-difference double-rotor system, a vibration signal shows a beat vibration phenomenon. By extracting beat peak and beat valley characteristics of beat vibration signals, unbalanced vibration amplitudes and phase information of the inner rotor and the outer rotor are separated. And optimizing the separated vibration signals by adopting an unbalanced coupling signal separation method based on birotor parameter modeling and data fitting to obtain high-precision amplitude and phase parameters, and taking the high-precision amplitude and phase parameters as input parameters of an automatic balance control system. And combining a trial mass method and an influence coefficient method to calculate the unbalance magnitude and position of the inner and outer rotors. And finally, the automatic balance controller drives a counterweight disc in the actuator to move to a target position, the unbalance amount of the rotor system is counteracted, and dynamic balance of the system is achieved.

The invention discloses an adaptive control method and system for paying-off tension of a ground wire, particularly relates to the technical field of automatic control, and is used for solving the problem of control misalignment caused by incapability of distinguishing and stripping multi-span coupling vibration interference in an existing tension control method. Firstly, high-frequency fluctuation components are identified by monitoring frequency band energy distribution of tension signals, then state space trajectory similarity and causal network topology of multi-point vibration signals are cooperatively analyzed, and local or global coupling of vibration sources is accurately judged; then, extracting a dominant vibration frequency and a phase difference, and separating a vibration interference component from the original tension signal through a phase compensation adaptive filter according to the dominant vibration frequency and the phase difference; and finally, subtracting the interference component from the original tension to obtain a real tension value for closed-loop adjustment of the output of the tension equipment. Accurate identification and dynamic compensation of vibration interference are achieved, and the control precision of the pay-off tension and the system stability are remarkably improved.

The invention discloses a blower surface treatment method based on an intelligent multi-axis linkage technology, and relates to the technical field of intelligent manufacturing and automatic control. Comprising the following steps: S1, collecting a vibration signal in real time through a multi-source sensor network; s2, preprocessing the vibration signal to obtain a vibration component, and determining a dominant vibration source according to the frequency band energy of the vibration component; s3, generating a dynamic suppression strategy according to the dominant vibration source; and S4, nozzle track deviation is obtained in real time through a laser displacement sensor, and the proportional gain and the integral gain of a PID controller are adjusted. Frequency domain separation is carried out on multi-source coupling vibration signals, a leading vibration source is recognized from the signals, a suppression strategy is dynamically generated, meanwhile, the nozzle track deviation is corrected to be within 0.03 mm in real time through a laser displacement sensor, the problem of misjudgment caused by frequency spectrum aliasing in a traditional method is solved, and the method is suitable for large-scale popularization and application. And the track precision and the coating uniformity of special-shaped curved surface spraying are improved.

The invention relates to the technical field of unit gap vibration testing, in particular to a unit gap vibration testing method based on transient numerical simulation, and the method comprises the steps: building a multi-degree-of-freedom dynamic model through obtaining unit structure parameters and operation parameters, carrying out the global optimization of stiffness matrix and damping matrix parameters through employing a genetic algorithm, and generating a high-precision dynamic model; a thermal fluid coupling module is integrated in the model, a coupling weight factor is dynamically corrected in combination with a particle swarm optimization algorithm, a multi-physical-field unsteady-state coupling vibration response equation is generated, and a Pareto optimal solution set is solved in combination with a multi-objective genetic algorithm to optimize gap parameters. According to the invention, real-time evaluation of the vibration state and closed-loop output of fault early warning signals are realized. According to the invention, the problem of insufficient characterization of unsteady state multi-field coupling characteristics in the prior art is solved, and high-precision technical support is provided for online monitoring of rotating machinery.

The invention relates to a train-rail coupling vibration analysis method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: dividing a plurality of track units, constructing a motion differential equation of a steel rail in the track units in a frequency domain, and solving to obtain a relation between longitudinal displacement and frequency on nodes at two ends of the steel rail and a relation between stress and frequency on the nodes at the two ends of the steel rail; constructing a steel rail dynamic stiffness matrix for the steel rails in the rail units, and constructing a rail dynamic stiffness matrix for the rail units according to the steel rail dynamic stiffness matrix; assembling to obtain an integral dynamic stiffness matrix of the train-rail system, and constructing a transfer matrix of a rail; and determining a track irregularity excitation power spectrum, and solving to obtain a dynamic response index of the train-track system on each degree of freedom under the track irregularity excitation power spectrum according to the transfer matrix and the overall dynamic stiffness matrix. By adopting the method, the calculation efficiency of the dynamic response index can be improved.

The invention discloses a vibration and conventional fatigue load coupled nonlinear damage accumulation prediction method. The method comprises the following steps: analyzing and determining a peak stress at a dangerous point under the loading of a conventional fatigue load according to a finite element model of an engineering component; determining a stress amplitude probability density function at the dangerous point under random vibration loading according to structural dynamics analysis; searching a pre-generated material fatigue life curve; determining equivalent stress at the dangerous point under random vibration loading according to the fatigue life curve; calculating the ratio of the peak stress loaded by the conventional fatigue load at the dangerous point to the random vibration equivalent stress, and establishing a coupling damage parameter according to the vibration and conventional fatigue load coupling series; and establishing a nonlinear damage accumulation model of vibration and conventional fatigue load coupling. According to the nonlinear damage accumulation model provided by the invention, the influence of vibration, a conventional load sequence and a coupling series is considered, the parameter determination is simple, and high-precision prediction of structural damage evolution under complex load coupling can be realized.

The invention provides a coupled vibration analysis method for a tungsten wire rope in a silicon single crystal pulling system, and belongs to the technical field of silicon single crystal growth of integrated circuits. The method comprises the following steps: constructing a lifting model of a tungsten wire rope in a silicon single crystal lifting system, and obtaining various lifting parameters of the tungsten wire rope; constructing a nonlinear vibration equation of the tungsten filament rope by utilizing the Hamiltonian principle according to each lifting parameter; and performing discretization processing on the nonlinear vibration equation by using a Galerkin method to obtain a linear vibration equation, solving the linear vibration equation, and obtaining a coupled vibration analysis result of the tungsten wire rope by using a solving result. The vibration suppression of the silicon single crystal pulling system can be realized, and the quality of the silicon single crystal is improved.

The invention provides a method and system for simulating coupled vibration of a truss structure and a netting structure of a culture net cage, and the method comprises the steps: building a vibration model of the truss structure according to the material and physical parameters of the truss structure; establishing a vibration model of the netting structure according to the material and physical parameters of the netting structure; establishing a coupling vibration model of the truss structure and the netting structure according to the dynamic tension action between the truss structure and the netting structure; carrying out integral calculation on the coupled vibration model in a time domain to obtain a motion response of coupled vibration of the truss structure and the netting structure of the aquaculture net cage; and according to the motion response, analyzing the change of internal stress of the truss structure and the netting structure of the aquaculture net cage, and determining a dangerous connection point of the dangerous area and the netting structure so as to reinforce the netting and improve the safety and reliability of the netting.

The invention relates to the technical field of industrial equipment predictive maintenance and fault diagnosis, in particular to a multi-motor coupling vibration intelligent diagnosis method and system. According to the technical scheme, the method comprises the following steps: generating a coupled vibration simulation data set with an accurate fault tag through a parameterized fault simulation module based on collected vibration data of multiple motors in a normal operation state and physical parameters of motor equipment; according to the invention, cold start of the diagnosis system under the condition of no historical fault sample is realized; a deep reinforcement learning agent is used for processing a space-time coupling signal, and a layered reward mechanism is combined, so that the decoupling diagnosis precision and the early warning capability are remarkably improved; through the online self-adaptive learning module, the system can be finely adjusted in real time according to field feedback to quickly adapt to the state of individual equipment; and the simulation-model evolution module continuously optimizes the simulator and the diagnosis model by using the accumulated real data to form a self-iterative closed loop.

The invention discloses a crack strong-robustness time-frequency compressed sensing monitoring method, system, medium and equipment based on inter-blade tip timing, and the method comprises the steps: determining the installation number and installation positions of blade tip timing sensors, and carrying out the circumferential installation of the blade tip timing sensors on a rotor blade case; the blade tip timing sensors are used for obtaining a time sequence when the rotor blades reach the positions of the blade tip timing sensors; based on each time sequence and the rotor blade included angle, obtaining an inter-blade tip coupling vibration speed measured by each blade tip timing sensor; an undersampling vibration speed sparse representation model is constructed based on the inter-blade tip coupling vibration speed, dynamic frequencies of adjacent rotor blades are decoupled and extracted by using a sparse reconstruction algorithm, and non-baseline monitoring is performed on a crack propagation process according to the evolution of a vibration frequency difference between the blades.

The invention discloses a self-energized magneto-rheological vibration reduction system and method suitable for transverse and vertical coupling vibration of a high-speed normal-conducting maglev train, and relates to the field of magnetic suspension. The suspension surface current collection coil and the guide surface current collection coil are used for inducing magnetic field changes and generating induced electromotive force; the energy management system is used for rectifying, boosting and stabilizing the induced electromotive force and storing electric energy; the acceleration detection system is used for detecting transverse and vertical vibration accelerations of the vehicle body; the control system is used for outputting control current according to the vibration signal; and the transverse magneto-rheological damper and the vertical magneto-rheological damper are used for outputting variable damping force according to the control current and restraining transverse and vertical vibration of the vehicle body. According to the method, effective suppression and energy recovery of transverse and vertical vibration are realized without depending on current frequency division processing, so that the decoupling control problem caused by active control noise in a normal-conducting magnetic levitation system is solved.

The invention relates to a shaft system response calculation method considering gyroscope bending-torsion coupling, which comprises the following steps: establishing a gyroscopic effect model based on the gyroscopic effect and Euler angle decomposition absolute angular velocity of a rotor; hydraulic excitation and coupling torque generated by the hydraulic excitation are calculated; the total kinetic energy and the total potential energy of the shaft system including the gyroscopic effect are calculated, and a dynamic response model of the shaft system of the water-turbine generator set is established based on the Lagrange equation. According to the method, a bending-torsion coupled vibration nonlinear mathematical model containing a gyroscopic effect and hydraulic excitation is constructed, the influence of the gyroscopic effect on shafting vibration characteristics, the hydraulic excitation and coupling torque generated by the hydraulic excitation are considered, and total kinetic energy and total potential energy containing the gyroscopic effect are integrated; the problem that vibration coupling factors are not fully considered in the prior art is solved, and the shaft system power precision of the water-turbine generator set is improved. The method has important practical significance for preventing major vibration accidents of the hydropower station, and the operation stability of the water-turbine generator set can be improved.

The embodiment of the invention discloses a vibration control method and system for a steel-concrete combined box girder bridge, and the method comprises the steps: carrying out the vehicle-bridge coupling vibration analysis through building a space finite element model which accurately considers the interface slippage and shear hysteresis effect; an initial optimal parameter group of the multi-tuned mass damper is optimized and determined based on an analysis result, and installation tuning is carried out; in the operation stage of the bridge, vibration is monitored in real time through the sensor system, parameters of the damper are dynamically adjusted by the controller according to the deviation between measured data and a target value, and self-adaptive control is achieved. Thus, high-precision simulation, optimization design and intelligent control are combined, the problem that the control effect is poor due to model simplification and fixed parameters in a traditional method is solved, and vibration suppression accuracy and environmental adaptability are remarkably improved.

The invention discloses a pulse dynamic electrochemical mechanical composite polishing method which comprises the following steps: step 1, preparing a polishing medium with an electrochemical thickening effect, the polishing medium being formed by mixing a dispersion medium, a dispersion phase, an electrolyte, an additive and an abrasive; secondly, a polishing medium is placed in a polishing groove, and a workpiece is fixed to a connecting shaft of a polishing device through a pneumatic clamp; thirdly, the positive electrode of a pulse power source is connected with the connecting shaft through a wire, and the negative electrode of the pulse power source is connected with the polishing groove through a wire; fourthly, a multi-dimensional coupling vibration device is fixedly connected with the polishing groove through an insulation connecting body, and the vibration frequency, the vibration amplitude, the voltage, the duty ratio and the frequency of a pulse power source are set; and fifthly, the polishing medium is subjected to the directional vibration effect of the multi-dimensional coupling vibration device. By setting a programmable vibration direction, a polishing medium is directionally induced to generate a shear thickening effect and an electrochemical oxidation effect on the surface of a specific workpiece, so that localized removal of a material is realized.

The invention discloses an axle coupling vibration response prediction method based on PIKAN, and the method comprises the following steps: carrying out the discretization of the time-space domain of a bridge and a vehicle according to the structure of the bridge and the running speed of the vehicle on a bridge floor; constructing an axle coupling control equation according to a discrete result; selecting proper internal and external univariate functions, and respectively constructing a KAN1 module used for bridge vertical displacement response prediction and a KAN2 module used for vehicle vertical displacement response prediction; and constructing a residual loss function based on an axle coupling control equation, conditional constraints and real observation data to train and optimize the KAN1 module and the KAN2 module. The method has the beneficial effects that the method provided by the invention has a relatively high calculation rate, has relatively good calculation precision on the premise of considering the calculation efficiency, and can be used as a substitute model for axle coupling finite element numerical simulation. And the bridge vibration response of a heavy-load vehicle not getting on the bridge can be calculated in real time, and the safety risk of the bridge structure is rapidly evaluated.

The invention belongs to the technical field of robots, and discloses a decoupling control method and system for a two-degree-of-freedom vibration suppressor of a robot, and the method comprises the steps: analyzing the structural characteristics of a robot system, and designing a decoupling control strategy through a structural invariance principle; coupled vibration of force applied in the X direction in the Y direction and coupled vibration of force applied in the Y direction in the X direction are effectively eliminated. Compared with a traditional vibration control method, the multi-degree-of-freedom vibration suppression method has the advantages that the influence of a pose related mode and a coupling mode of the robot is fully considered, multi-degree-of-freedom vibration suppression can be efficiently realized in real time in a complex load and dynamic environment, and the adaptability and the control precision are relatively high. The technology has wide application prospects in the fields of robot precision machining, assembling, carrying and the like, and the stability, precision and working efficiency of a robot system can be remarkably improved.

The invention relates to the technical field of equipment calibration, and discloses a collaborative directional calibration method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining the circumferential strain distribution data of a drill rod, and extracting the amplitude-frequency characteristics of a dominant vibration mode and the phase offset of an associated coupling vibration mode; generating an amplitude compensation coefficient according to the amplitude-frequency characteristics, generating a time-varying phase compensation factor in combination with the phase offset, and generating a dynamic vibration compensation parameter based on vibration energy distribution dynamic weighted fusion; based on a pre-trained nonlinear phase distortion compensation model, inputting a dynamic vibration compensation parameter and then outputting a gyroscope angular velocity signal after phase correction; performing vibration interference frequency band suppression processing on the accelerometer signal, and outputting the processed accelerometer signal; and performing iterative optimization on the corrected angular velocity signal and the processed accelerometer signal, and outputting a directional calibration result in combination with filtering smoothing processing. According to the invention, high-precision cooperative calibration of the inertial sensor in a multi-mode mechanical vibration environment can be realized.

The invention discloses a method for evaluating the influence of a large-span railway suspension bridge beam end corner on driving performance, and the method comprises the steps: building a three-dimensional finite element model of a large-span railway suspension bridge, coupling a suspension bridge beam end, a telescoping device and a track, and building a suspension bridge beam end-telescoping device-track coupling vibration model; the method comprises the following steps: establishing a vehicle model of a vehicle operated by a large-span railway suspension bridge, and forming a suspension bridge beam end-telescopic device-rail-train coupled vibration analysis system by taking a beam end corner or rail irregularity as external excitation; outputting a dynamic response index of the operating vehicle; dynamic response indexes of operating vehicles under different beam end corner working conditions are calculated, according to the design load of the suspension bridge, the amplitude of the beam end corner of the suspension bridge is calculated, and whether the beam end corner of the suspension bridge meets the requirement or not is evaluated. The dynamic response of the operating vehicle can be quickly obtained, and the mapping relation between the beam end corner deformation and the vehicle dynamic response index is established, so that the beam end corner rationality is more accurately evaluated according to the vehicle evaluation index.

The invention discloses a train rail coupling vibration control method, device and equipment and a readable storage medium, and is applied to the technical field of intelligent control, and the method comprises the steps: obtaining a nonlinear model considering a vibration mode of a rail based on a high-speed maglev train structure of a lap joint structure, a rail vibration equation and an electromagnet kinetic equation; determining motion characteristics of the nonlinear model to obtain a motion state space equation; determining a reference model corresponding to the nonlinear model, and determining a control law when the difference between the motion state space equation and the reference model is minimum; and determining target vibration control parameters by using a control law by taking the nonlinear model as a control object reference model as an ideal target. According to the method, the nonlinear model considering the vibration mode of the track is obtained through the high-speed maglev train structure based on the lap joint structure, the corresponding reference model and control law are designed, and due to the fact that the vibration mode of the lap joint structure is considered in the nonlinear model, the suppression effect on coupling vibration of the high-speed maglev train track is better.

The invention discloses a carrier roller fault diagnosis method and system based on coupled vibration analysis, and the method specifically comprises the steps: separating a phase-sensitive optical time domain reflection signal based on a physical parameter of a conveying system, separating the phase-sensitive optical time domain reflection signal into a direct vibration signal and a conveying belt conduction vibration signal, recording the direct vibration signal as a first frequency band signal, and recording the second frequency band signal as a second frequency band signal; recording the conveying belt conduction vibration signal as a second frequency band signal; calculating a feature vector of the first frequency band signal to obtain a first feature vector set; calculating a feature vector of the second frequency band signal to obtain a second feature vector set; and carrying out feature fusion on the first feature vector set and the second feature vector set, and obtaining probability distribution of fault categories based on fused features. According to the method, the physical phenomenon of'conveying belt-carrier roller coupling vibration 'is systematically utilized for the first time, the defects that an existing method is single in dimension and prone to being interfered are overcome through double-channel feature fusion analysis, and the accuracy and robustness of early fault diagnosis of the carrier roller of the long-distance belt conveyor are remarkably improved.

The invention discloses an electric reactor multi-field coupling vibration fatigue simulation method and system based on an S-N curve, and belongs to the technical field of electric power equipment fatigue simulation, and the method comprises the steps: obtaining structure parameters and material parameters of a target electric reactor, and building a parameterized physical model comprising an iron core, a winding and an insulation assembly; based on the parameterized physical model of the target reactor, simulating a time-varying mechanical force in the target reactor under the excitation of rated power frequency current; according to the time-varying mechanical force, calculating the vibration response of each part of the target reactor, and extracting the alternating stress distribution of the target reactor under the steady-state operation condition; and based on the material S-N curve of each component of the target reactor, analyzing the alternating stress distribution by adopting a linear cumulative damage theory, and calculating the failure cycle index and the fatigue life of each component under the preset cycle load. According to the method, through multi-field coupling simulation and S-N curve analysis, the fatigue life of the electric reactor is predicted, and a basis is provided for preventive maintenance.