134 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 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 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 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 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 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 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 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.

The application 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 following steps: collecting vibration signals of a long flexible blade in a running state, wherein the vibration signals are coupled by multiple factors including aerodynamic load, gravity and centrifugal force; constructing an over-determined equation set containing multi-source excitation characteristics based on a blade dynamics model; decomposing the vibration signals by using a sparse decomposition algorithm to obtain signal decomposition results; solving the over-determined equation set based on the signal decomposition results to obtain modal parameters of each coupled vibration source; and determining a state monitoring result of the long flexible blade according to the modal parameters of each coupled vibration source.

This invention discloses a modeling method, equipment, and medium for a lumped parameter model of a harmonic reducer. The method includes the following steps: analyzing the interaction between the flexible wheel and the outer ring of the thin-walled bearing to obtain their interaction model; establishing a lumped parameter model of the entire harmonic reducer; analyzing the rotation law of the outer ring of the thin-walled bearing and its influence on the fault impact time interval; establishing a mathematical model of the excitation when the thin-walled bearing has an impact-type fault, as the input to the lumped parameter model; and establishing and solving the motion differential equations. This invention can accurately simulate the characteristic frequencies of the thin-walled bearing in a harmonic reducer during a fault, explains the formation of the vibration response frequency distribution during harmonic transmission, and fills the research gap of lacking an effective mechanism model for the coupled vibration of multiple components in a harmonic reducer.

The present application relates to a kind of theoretical detection methods for determining local void of monolithic track bed, comprising the steps of: obtaining train-monolithic track bed-lining-ground coupling vibration equation according to the control equation of rail, monolithic track bed and lining and the dynamic balance equation of train, the vertical acceleration of car body is calculated using Newmark algorithm;The Hilbert-Huang transform spectrum of the vertical acceleration of car body is obtained;According to the energy change of the Hilbert-Huang transform spectrum of the imf2 decomposition curve under the void state, the position of the local void area of monolithic track bed is judged.The beneficial effects of the present application are: the position of the local void area of monolithic track bed can be judged according to the energy value change of the Hilbert-Huang transform spectrum of the vertical acceleration of car body imf2;Whether there is track bed void and the starting position of void can be judged, and the severity of void length can be qualitatively estimated according to the length of energy value change, which helps to reduce the operation and maintenance cost of subway track.

The application discloses a kind of longitudinal unmanned helicopter transmission shaft and its design method, it is related to unmanned helicopter transmission system design field.The design method includes: initial parameter is entered including the rotation inertia of each component of system and multi-working condition load spectrum;Transmission shaft structure design is carried out and stress intensity check is completed;Local resonance is avoided by regulating single shaft frequency;Eight degrees of freedom transmission system torsional vibration dynamics matrix is constructed to check whole chain coupling vibration;Torsional angle-transmission ratio coupling model is used to solve and compensate actual deviation of front and rear rotor phase;Fatigue damage value of transmission shaft is quantitatively calculated based on Miner theory;Finally, according to multi-dimensional convergence criterion, the final parameter is output.The application can accurately predict coupling vibration, control the deviation of rotor phase within 3°, and quantify fatigue life, effectively improve the stability and service durability of transmission system.

The invention discloses an underwater electronic module anti-vibration structure which comprises a base plate and a center column, the center column is arranged on the base plate, a first fixing plate and a second fixing plate are connected to the center column, and an electronic module is arranged between the first fixing plate and the second fixing plate. The first fixing plate is connected with the chassis through a supporting column; and a clamping block is arranged on the central column and is clamped with the electronic module through a hoop so as to fix the electronic module. According to the anti-vibration structure of the underwater electronic module, the center column and the supporting column are arranged on the chassis, the first fixing plate and the second fixing plate are fixedly connected to the center column, the electronic module is fixed, and the bending strength and the torsional strength of the structure are improved by adding the design of the supporting column, flange embedding and the like; by adding the anti-vibration pad, the clamping block and the hoop, resonance between the vibration isolation system and the electrical system is avoided. On the basis of relieving the system coupling vibration effect, the operation stability of the electronic equipment is improved.

The application discloses a kind of balanced cutting adaptive control method, system and numerical control lathe, belong to numerical control machine tool technical field, solve double-spindle double-tool turret numerical control lathe in double-tool turret balanced cutting finishing stage, because of cutting fluid impact, servo response difference and temperature gradient cause cutting force-thermal deformation coupling vibration, lead to surface finish deteriorate, while conventional detection cannot be identified, finally cause precision parts batch scrapping problem.It includes the following steps: initialization and reference calibration step, determine the fixed parameters required for algorithm operation and store in numerical control system parameter table.The application is by collecting double-tool turret servo current and decoupling into high-frequency component and low-frequency component, using high-frequency component to adjust feed rate, using low-frequency component to offset radial position, to cut off the positive feedback coupling chain between cutting force fluctuation, chip shape change, cooling liquid jet deflection, temperature field distribution change and cutting depth fluctuation, suppress non-periodic dynamic vibration response, avoid machining surface finish deterioration.

The invention belongs to the technical field of speed bump design, and discloses a road surface speed bump optimization design method based on vehicle-road coupling vibration response, which comprises the following steps of: determining asymmetric segmented curve design of a speed bump; resolving analytic expressions of curves of different structural sections of the deceleration strip; establishing a speed bump combination curve scheme, and combining the cosine segment and the parabolic segment according to different horizontal projection lengths; establishing a coupling model among the wheels, the suspension system, the vehicle body and the road surface; the height of the speed bump is set to obtain different working conditions under various curve combination schemes; and screening an optimal speed bump scheme according to a vibration response result. According to the invention, the traditional speed bump design is broken through, and technical optimization is realized on multiple aspects such as speed reduction control, driving comfort and retrograde driving warning.

In ERIT, it is necessary to set a reference model for generating a target command for an ideal response before FF control design, and if an appropriate reference model cannot be set, coupled vibration caused by a plurality of structures cannot be suppressed. Further, when the characteristics of the plant are partially or entirely unknown, it is practically impossible to provide an appropriate reference model. Therefore, an object of the present invention is to provide a design method and a design device for data-driven damping feedforward control that can eliminate the need to set a complicated reference model.SOLUTION: A feedforward control design method has a controller structure in which a plurality of feedforward controllers to be designed are provided, a denominator polynomial of each feedforward controller is common, and a numerator polynomial is a free parameter, and the free parameter is designed by solving an optimization problem for minimizing a deviation between a target command generated by one feedforward controller among the plurality of feedforward controllers and a predicted response.SELECTED DRAWING: Figure 2

The invention relates to the technical field of medical instruments, in particular to a piezoelectric driving miniature optical probe for cerebrovascular interventional imaging, which comprises a glass tube base body, a single piezoelectric ceramic piece and the like, and is characterized in that the glass tube base body is of a hollow cylindrical structure, and an inclined groove is formed in the axial center of the glass tube base body; the single piezoelectric ceramic piece is fixed on the outer side of the glass tube base body. Through a hollow rod type stator structure composed of a single piezoelectric ceramic piece and a glass tube base body with a 10-degree inclined groove, mode conversion from longitudinal vibration to longitudinal-torsional coupling vibration is achieved, an elliptical motion track is formed at the position of a miniature magnetic ring at the front end of the stator, 360-degree optical scanning is achieved through friction driving of a rotor, and the mechanical property of the motor is improved. Compared with a traditional far-end miniature probe with the diameter usually larger than 1.5 mm, the whole outer diameter of the probe is reduced to 0.4 mm, and smooth navigation and passing in tortuous and narrow brain middle artery (the diameter is usually smaller than 0.5 mm) are easier.

The invention relates to the technical field of alloy production, and discloses a titanium alloy die forging residual stress reduction control method and system, and the method comprises the steps: carrying out the multi-physical field coupling vibration regulation of a titanium alloy die forging based on initial state data, and obtaining a multi-dimensional vibration control parameter; based on the multi-dimensional vibration control parameters, multi-direction vibration is applied to the titanium alloy die forging, and dynamic response data are obtained; performing multi-modal data fusion on the dynamic response data to obtain a residual stress reduction evaluation index; based on the residual stress reduction evaluation index, performing multi-objective decision on the multi-dimensional vibration control parameter to obtain an optimized vibration parameter; based on the optimized vibration parameters, robustness analysis is conducted on the vibration control instruction sequence of the titanium alloy die forging, and a final control instruction is obtained; based on the final control instruction, performing multi-dimensional verification on the residual stress reduction effect to obtain a final residual stress reduction report; the method can improve the residual stress reduction efficiency of the titanium alloy die forging.

The electric control safety valve, control method, computer readable storage medium and program product are used for preventing the pressure in the pressure container from exceeding the pressure limit, comprising a main valve, a valve island, a controller and a pressure sensor. The main valve is a pneumatic stop valve, the pneumatic control cavity of the main valve is communicated with the air outlet A of the valve island, the air inlet of the main valve is communicated with the pressure container, and the air outlet of the main valve is directly communicated with the atmosphere. The valve island is a composite normally open two-position three-way valve composed of three same electromagnetic valves, the air inlet P of the valve island is communicated with the pressure container, and the air outlets T2 and T3 of the valve island are both communicated with the atmosphere. The controller compares the pressure value of the pressure container collected by the pressure sensor with the safety valve opening and closing pressure value set by the program, controls the action of the electromagnetic valve in the valve island according to the control logic, realizes the opening and closing of the main valve, and completes the pressure control of the pressure container. The electric control safety valve provided by the application has high pressure control precision, a large pressure adjustable interval, large and adjustable air discharge flow, a fault redundancy function and no fluid-solid coupling vibration during air discharge.

This invention relates to the field of structural vibration testing and analysis technology, and discloses a method and system for vibration reduction detection of expansion joints based on vehicle-bridge-joint coupled vibration analysis. The method includes: constructing a cross-sectional coordinate system and obtaining a digitized contour line; performing interferometric analysis based on the load contact envelope to generate a pressure distribution matrix, and obtaining a set of acoustic and vibration characteristic vectors; reconstructing a vibration diagnosis plane and constructing a dynamic performance safety domain; executing a three-layer screening logic to obtain a set of equilibrium calibration parameters; constructing a physical calibration command sequence to drive relevant actuators to perform physical parameter compensation, and obtaining a test compliance verification mark. This invention solves the problem of dynamic distortion caused by the simplification of the cross-section of the beam steel section, realizes multi-index collaborative diagnosis and accurate parameter implementation, eliminates vehicle bounce impact and vibration noise, and improves bridge ride comfort, structural durability, and operational safety.

This invention discloses a variable center-of-mass bending-torsional coupling piezoelectric energy harvesting device, belonging to the field of piezoelectric material energy harvesting control. The device includes a mountain-shaped cantilever beam, piezoelectric ceramic plates, and two sets of variable center-of-mass mechanisms. The mountain-shaped cantilever beam is fixed to a support plate, and the piezoelectric ceramic plates are adhered to it. The two sets of variable center-of-mass mechanisms are respectively connected to both ends of the mountain-shaped cantilever beam, and rubber films are adhered to the opposite cavities of the two water tanks. External excitation causes the water in the water tanks to vibrate, and the centers of mass of the two water tanks shift in opposite directions, generating torque in opposite directions. This drives the mountain-shaped cantilever beam to undergo bending-torsional coupling vibration. The piezoelectric ceramic plates convert their mechanical energy into electrical energy through the positive piezoelectric effect and harvest it. This invention improves energy harvesting efficiency compared to traditional single bending type piezoelectric energy harvesting devices by utilizing the variable center-of-mass mechanism to generate bending-torsional coupling vibration and harvest energy. Simultaneously, by utilizing the center-of-mass shift caused by water vibration to induce bending-torsional coupling vibration in the mountain-shaped cantilever beam and harvest energy, it improves energy utilization.

A kind of virtual track device for magnetic levitation vehicle track coupling vibration test, including elastic support mechanism, track, vertical sliding support mechanism, electromagnet, monitoring mechanism and electromagnetic drive mechanism;Elastic support mechanism is connected on the workpiece mounting surface of the top and bottom of frame;Track is laid in the middle of frame by elastic support mechanism;Vertical sliding support mechanism includes sliding assembly vertically connected in the middle of frame and support arm mounted on sliding assembly;Electromagnet is suspended below track by support arm;Monitoring mechanism includes first gap sensor mounted on electromagnet, first accelerometer, second gap sensor mounted on the top of frame and second accelerometer mounted on track;Electromagnetic drive mechanism is installed on the bottom of frame.The invention drives the track supported by spring to move in vertical direction by electromagnetic actuator, to simulate the movement of bridge along vertical direction driven by electromagnetic force in virtual setting, to investigate the suspension stability of electromagnet under this working condition.

The application discloses a kind of integrated multi-branch flexible arm rigid-flexible coupling vibration measurement and control device, including linear motion structure part, flexible arm structure part, vibration detection part, vibration excitation part and drive control part.Vibration is generated by exciting base platform by vibration excitation part, experimental platform and base platform are coupled by spring to generate vibration, linear motion structure and experimental platform are coupled by spring to generate vibration, flexible arm structure is installed on linear motion structure to generate vibration, forming rigid-flexible coupling structure.Laser displacement sensor measures vibration detection mark point area, and obtains the vibration information of flexible arm.The application can be used to study the influence of linear guide rail friction, spring stiffness and other factors on rigid-flexible coupling motion of flexible arm system and the corresponding vibration control method.Laser displacement sensor is used for non-contact measurement, with high measurement accuracy, fully collects multi-frequency vibration energy in multiple directions, and considers the influence of structure elasticity on vibration characteristics.