25 results about "Mechanical resonance" patented technology

Provided is a micromechanical electrical signal amplifier, which can be applied to the field of microelectronics. The structure of the amplifier comprises: an electro-mechanical conversion structure for generating an electrostatic driving displacement; a mechanical resonance structure for generating an amplified electrical signal in response to the amplified electrostatic driving displacement; and a mechanical-electric conversion structure for outputting the amplified electrical signal, wherein the mechanical resonance structure comprises a first surface and a second surface arranged oppositely; the electro-mechanical conversion structure is connected to the first surface of the mechanical resonance structure; and the mechanical-electric conversion structure is connected to the second surface of the mechanical resonance structure. The elastic beam group in the mechanical resonance structure adopts a piezoresistive material, and the self-amplification effect of the mechanical resonance structure is used to amplify the electrostatic force response displacement and further amplify the electrical signal.

The application discloses a kind of multimodal collaborative motion control method and system of semiconductor probe station, the method includes: in the transition period of macro motion table carrying wafer to execute large stroke deceleration and at deceleration end section, the coupling disturbance characteristics that the estimated disturbed trend that macro motion table will cause micro motion table is obtained based on the residual motion state of macro motion table and is characterized, based on coupling disturbance characteristics drive micro motion table to execute reverse feedforward compensation trajectory, inhibit the residual oscillation that the residual oscillation of micro motion table is excited by the structural coupling transmission of macro motion table sudden stop kinetic energy;In the process that micro motion table carries probe approaches wafer, the occurrence of physical contact event is judged according to the transient singular feature extracted to the driving signal of micro motion table time-frequency analysis, in response to the determination result, the control mode of micro motion table is switched from trajectory tracking mode with position follow as target to energy dissipation mode with mechanical resonance energy as target, realize the effect of giving priority to both efficiency and high accuracy.

The application discloses a kind of air-cooled radiator fan rotating speed control method and system, it is related to fan control technical field, its method includes: the vibration acceleration data on the controller circuit board of multiple fan array is collected;Fan system is currently based on the vibration acceleration data evaluation vibration state;Based on the vibration state adjustment multiple fan array Synchronization error allowable range;Real-time rotating speed information of each fan in the multiple fan array is obtained;Based on the synchronization error allowable range and the real-time rotating speed information of each fan Signal correction instruction is generated;Based on the signal correction instruction, the rotating speed of each fan in multiple fan array is adjusted, and the embodiment of the application has the advantages that the synchronization error allowable range is adjusted dynamically, effectively cope with the rotating speed synchronization control challenge of fan system under different vibration states, avoid the instability of control system and the disadvantage of hardware degradation caused by mechanical resonance.

The application discloses an ultrafiltration permeation regulation method and device based on a gradient sponge structure dialysis membrane and relates to the technical field of hemodialysis. An intelligent response membrane assembly containing a nonlinear aperture gradient is constructed; a signal is collected and a concentration polarization critical index is calculated; when the threshold value is exceeded, a multi-frequency coupling pulse control instruction containing a mechanical resonance excitation waveform and a phase reverse matching osmotic pressure oscillation waveform is generated; mechanical resonance excitation is applied to the blood side to induce membrane layer micro-breathing deformation, and an osmotic pressure oscillation waveform is injected into the dialysate side to form a reverse solute diffusion field; microgel deformation feedback signals are monitored in real time, waveform parameters are dynamically adjusted, and the concentration polarization critical index is returned to a safe interval until the ultrafiltration flux is adaptively regulated. The device comprises an intelligent gradient membrane assembly, a fluid power regulation module, an osmotic pressure wave generation module, a sensing feedback array and a central processing unit, can effectively inhibit membrane pollution and concentration polarization, and improves the system operation stability.

This invention relates to the field of building materials and precast concrete component manufacturing technology, and discloses an integrated process for precise positioning and centrifugal compaction of steel reinforcement skeletons for non-prestressed cement poles. It aims to solve the problems of existing centrifugal processes lacking dynamic feedback, failing to effectively correct mid-span deflection of the steel reinforcement skeleton, and being prone to mechanical resonance and uneven pipe wall compaction due to the solidification operation mode. The process uses laser to acquire three-dimensional projection data of the skeleton, driving the support mechanism to apply an upward compensating force for centering and mold closing verification. During the centrifugation stage, the motor current and machine base vibration frequency are monitored to dynamically adjust the speed, phase, and acceleration, achieving adaptive material uniformity and traversing the resonance zone. Simultaneously, the slope of the motor power load change is monitored to determine the compaction degree, and the opening angle of the slurry discharge valve is synchronously adjusted according to the controlled deceleration gradient. This achieves physical centering of the skeleton before mold closing, constructs a dynamic centrifugal closed loop based on dynamic feedback, quantifies the compaction benchmark, and smoothly releases pressure.

This invention relates to the field of vehicle seat control technology, specifically disclosing a dynamic compensation method and system for preventing accidental touches of microswitches in vehicle seats. The method includes: synchronously acquiring the triaxial spatial acceleration signal and real-time loop current signal corresponding to each microswitch via hardware triggering; extracting real-time spectral features from the triaxial spatial acceleration signal to obtain real-time spectral features; matching the real-time spectral features with a pre-stored mechanical resonance fingerprint to generate a resonance flag. In actual vehicle operation, this invention determines the resonance state of the microswitch by synchronously acquiring spatial acceleration and loop current signals and comparing the spectral features with a pre-stored mechanical resonance fingerprint. The system combines multi-dimensional information such as road condition type, microswitch service life, and online estimated contact resistance to classify scenarios, and performs layered dynamic compensation calculations under different operating conditions accordingly, removing the interference component caused by vibration from the real-time current.

This invention discloses a urea solution pressure stabilization supply system and control method based on variable frequency delivery. The system includes a urea tank, a variable frequency main pump, a main supply pipeline, a return pipeline, an active hydraulic capacitor, and an electronic control unit. The active hydraulic capacitor, connected in parallel at the end of the main supply pipeline, includes a voice coil motor and a metal bellows. The electronic control unit performs frequency domain decoupling on the total urea injection demand signal. Based on the low-frequency steady-state flow component, it controls the variable frequency main pump to maintain the static background pressure. Based on the high-frequency transient flow component, it controls the voice coil motor to drive the metal bellows to generate displacement to compensate for transient pressure pulsations. This invention determines the crystallization state by detecting the equivalent mechanical impedance. Under non-injection conditions, it drives the metal bellows to generate mechanical resonance to peel off the crystals, and combines this with a low-speed flushing liquid flow to discharge the crystals. In addition, the return urea solution flows through the heat exchange jacket outside the stator for heat dissipation and auxiliary defrosting, realizing the system's pressure stabilization, self-cleaning, and thermal management.

The application discloses a kind of multi-actuator collaborative targeting control method and system of intelligent waist pad.The method is first based on anatomical static weight and muscle collaborative coupling matrix to calculate muscle function importance score, introduce historical habit and hardware state factor to generate integrated control priority;Subsequently, based on priority, construct trapezoidal motion envelope, according to the score dynamically set gradual time window, execute intermittent unloading cycle containing recovery phase;Finally, through staggered start strategy, air line bus pressure monitoring and mechanical resonance suppression algorithm, the action of multiple actuators is finely scheduled.The application realizes the precise hierarchical intervention to the core and auxiliary muscle groups of waist and back, while ensuring physiological comfort, solves the surge current and air line pressure loss problem caused by multiple load concurrency, improves the electrical safety and mechanical stability of system operation.

The present application relates to the technical field of laser welding control, in particular to a force-position hybrid dynamic control method for a laser welding machine, comprising: collecting welding continuous real-time contact force signals and high-frequency filtering, and acquiring real-time position coordinates of a welding head through a position encoder; inputting the filtered force signals into a dynamic force compensation model based on a nonlinear disturbance observer, decoupling distortion components caused by external disturbances and mechanical resonance, and outputting compensated expected contact force signals; comparing and generating position and force original errors, inputting force errors into an adaptive fuzzy force controller, adjusting fuzzy rules and proportional factors online according to error amplitudes and change rates, outputting force compensation displacement amounts, and superimposing the force compensation displacement amounts with position error vectors to generate comprehensive pose adjustment instructions. The method can eliminate force signal distortion, realize force-position collaborative fusion control, and improve the dynamic precision and stability of welding force-position hybrid control.

A method and controller for controlling an axial flux machine are described, wherein alternating current supplied to multiple coils is injected as a compensating current to reduce the mechanical resonance components of the rotor. This compensating current is added to an orthogonal current (IA) as the rotor rotates within one or more speed ranges. q ) component and DC (I d The modulated current component is a modulation current component of at least one of the following components (when the alternating current is represented as a vectorized DC component). This modulated current component has: an electrical frequency that varies with the rotor speed within a frequency range between a first frequency and a second frequency, including a frequency substantially the same as the rotor's fundamental mechanical resonant frequency; and a phase that is different from the rotor's fundamental mechanical resonant frequency.

The application discloses a wafer overturning and multi-angle regulating device, and belongs to the technical field of semiconductor manufacturing equipment. The device comprises a main support, a clamp support, a wafer clamp and an adjusting mechanism. The clamp support is rotationally connected with the main support and can rotate around a first axis which is collinear with the wafer axis; the wafer clamp only clamps the edge or side surface of the wafer to avoid contacting the front and back surfaces. The main support is driven by the adjusting mechanism to overturn and rotate around the second axis and the third axis which are perpendicular to each other, so that multi-degree-of-freedom posture adjustment is realized. The device is integrated with an angle monitoring and closed-loop control unit, can realize real-time feedback and automatic adjustment of the deflection angle, is provided with a force sensor on the clamping part to adaptively control the clamping force, is equipped with a wafer detection and radial adjustment device to dynamically adapt to wafers with different diameters, and is additionally provided with a dynamic vibration suppression mechanism to actively suppress mechanical resonance in the adjustment process. The wafer can be overturned and regulated in a high-precision, non-damage and multi-angle mode, and the yield and efficiency of the semiconductor process are significantly improved.

The present disclosure relates to device tracking. Described is an improved passive marker device (10). The passive marker device (10) comprises a coil element (12), a mechanical resonator (14), and a circuit element (16). The coil element is coupled to the mechanical resonator for producing a response signal having an operating frequency corresponding a mechanical resonating frequency of the mechanical resonator and a signal decay having a decay time constant in response to an excitation pulse, wherein the excitation pulse is a magnetic or electromagnetic excitation pulse. The circuit element is configured to limit a power transferred to the mechanical resonator when the at least one excitation pulse has an excitation amplitude equal to or greater than a threshold value.

This invention relates to the field of control, and in particular to a method and system for power regulation of a cotton harvester using multi-source data fusion. The method includes: constructing a multi-dimensional operational scenario state vector; inputting the state vector into a forward prediction model to generate an initial power demand curve; training a reverse correction model using historical data and actual power consumption; outputting an error gradient vector and calculating a prediction deviation scalar; correcting the initial curve based on the error gradient to obtain a corrected power demand curve; generating an initial power allocation scheme for the drive, harvesting, and cleaning systems; iteratively adjusting the power ratio of harvesting and cleaning when the overlap between the operating frequency and mechanical resonance frequency of the initial scheme exceeds a threshold; recording the vibration damping adjustment cost until the overlap reaches the target; calculating the system's basic confidence level based on the sensor data dispersion and cross-correlation; fusing the vibration damping adjustment cost function value to generate the system confidence level; adjusting the power allocation scheme accordingly; and outputting execution commands.

The application discloses an industrial internet-oriented device intelligent monitoring and fault early warning system and method, which comprises a direct current bus transmission unit, a drive control node and an industrial load device, a digital control unit generates a discrete detection sequence as an excitation, a quadrature decoupling module is used to inject a given value of a direct-axis current, a cross-axis compensation amount is calculated by using a constant torque constraint equation to offset electromagnetic torque pulsation, a high-frequency signal acquisition unit acquires response data, a generalized impedance reconstruction module performs mutual power spectrum operation based on the original excitation to reconstruct a generalized complex impedance spectrum, and a fault identification module identifies insulation aging or mechanical resonance faults according to impedance spectrum differential characteristics, and then dynamically adjusts the modulation strategy of an inverter circuit to execute a generated frequency spectrum notch, limit voltage change rate or clamping control instruction. The application realizes online silent monitoring and closed-loop safety control of the insulation state and mechanical characteristics of the device without external sensors.

The application belongs to the technical field of high-end measuring equipment, and particularly discloses a laser collimation guide rail straightness dynamic compensation measurement method based on multi-sensor fusion, which comprises the following steps: forcibly synchronizing the initial optical two-dimensional displacement signals, inertial transient angular velocity and acceleration signals and orthogonal temperature field signals output by a multi-sensor integrated measurement head through a global hardware clock bus based on a field programmable gate array in a central synchronous processing unit; calculating the optical path transverse refractive index spatial gradient based on the orthogonal temperature field signals and deducing a false light spot transverse displacement compensation amount vector; and the application aims to solve the technical problems that the existing pure optical straightness measurement technology is difficult to strip the light beam transverse thermal bending false image, difficult to decouple high-frequency mechanical vibration and low-frequency geometric deformation under complex dynamic working conditions, thereby affecting the dynamic closed-loop compensation precision and possibly causing system mechanical resonance.

The present application belongs to the technical field of machine tool control, and discloses a control method and system of a five-axis machining center. The angle instruction sequence of the rotating shaft is obtained and is intercepted in sections by using a sliding window. The sub-sequences in each sliding window are respectively decomposed by three-layer wavelet packet, the energy distribution and information energy entropy are obtained and are screened in sections, and the micro-oscillation candidate area is obtained. The tool geometric model and local surface data are called, the minimum distance between the swept envelope surface and the theoretical machined surface is obtained, and the micro-oscillation candidate area is verified in combination with the safety threshold. The oscillation fundamental frequency and peak-to-peak value of the micro-oscillation candidate area passing the verification are extracted, and the frequency band is classified in combination with the mechanical resonance frequency table of the rotating shaft. The fitness function is solved according to the classification result and the improved particle swarm algorithm, and the optimal suppression parameter is obtained. The optimal suppression parameter is input to the five-axis machining center for machining control, which is conducive to balancing the machining precision and efficiency.

The application discloses a kind of control method of servo motor, servo driver and servo system, belong to motor control technical field, in the application, first, the actual angular velocity of monitoring servo motor is obtained according to the rotational speed instruction of servo motor, and then, according to the deviation between actual angular velocity and theoretical angular velocity, obtain vibration signal to the rotational speed instruction of servo motor is adjusted, to control servo motor operation by adjusted target rotational speed instruction;Since vibration signal can represent the low-frequency vibration characteristics of servo motor, and vibration signal will not be influenced by resonance frequency offset, so, by adjusted target rotational speed instruction control servo motor operation can suppress mechanical resonance in the process of servo motor operation, compared with using notch filter to realize the resonance suppression of servo system, improve the reliability of servo motor control method in resonance suppression.

This utility model discloses a compact splicing flash meter, belonging to the technical field of flash meter technology. It includes a base, a stage mounted on the upper surface of the base, an observation device inside the stage, an RGBW light source movably mounted above the stage, and ring light sources around the bottom of the observation device. This utility model integrates the camera module and telecentric lens system below the stage, achieving dual technical advantages: firstly, the device's center of gravity is significantly lowered, effectively improving the stability of the overall structure; secondly, the compact layout reduces the vibration transmission path of mechanical components. This integrated design, through the aforementioned synergistic effect, can suppress the impact of high-frequency vibration on the optical system, avoiding imaging blurring caused by mechanical resonance, thereby ensuring high-efficiency measurement accuracy even under vibration conditions.

The application belongs to the technical field of electrical equipment state monitoring, and specifically discloses a method and system for predicting the deterioration trend of a lightning arrester in extremely cold conditions based on multi-physical field coupling, which comprises the following steps: synchronously collecting multi-dimensional data such as bus voltage, end total current, surface temperature field and broadband mechanical vibration of the lightning arrester; based on the internal instantaneous Joule heat power, the electric parameter is deconstructed, and cross-correlation analysis is performed with the surface temperature field to calculate the effective heat conduction time delay representing the structural integrity; the newly added mechanical resonance frequency is extracted from the vibration signal, and the total current is modulated based sideband lock detection to identify the electromechanical coupling damage features causing the current modulation effect. The application combines the evolution trend of the heat conduction time delay and the detection results of the electromechanical coupling damage to generate a prediction report containing the structural thermal resistance state and the crack electrical risk level, which can distinguish the defect nature and evaluate the electrical risk, and is helpful for grading early warning.

The application discloses an underwater friction nanogenerator device, a self-driven underwater acoustic communication system and a preparation method, which sequentially comprise, from top to bottom, a high-entropy energy material / LIG / Ecoflex composite electrode layer as a top layer, an intermediate layer for supporting the top layer and a bottom layer for adjusting acoustic-mechanical resonance characteristics; the high-entropy energy material / LIG / Ecoflex composite electrode layer sequentially comprises, from top to bottom, a high-entropy energy material film, a laser-induced graphene pattern and an Ecoflex elastomer film; the laser-induced graphene pattern is located on the surface of the Ecoflex elastomer film, and the high-entropy energy material film is deposited on the surface of the laser-induced graphene pattern by a magnetron sputtering technology.

The embodiment of the application provides a kind of high sensitivity acoustic wave sensing system and method, belong to optical fiber sensing technical field.The system includes: narrow line width laser output continuous coherent light, is divided into two ways by beam splitter;Reference arm is set in the acoustooptic modulator operating in continuous wave mode, and the light signal is shifted with fixed frequency, and the local oscillator light is output;Sensing arm is set in the suspended micro-nano fiber sensing probe, and the external acoustic wave signal is modulated as the phase change of light;Two-way light is combined by second optical coupler, and is converted into beat frequency electric signal by photoelectric detector;IQ demodulation module carries out quadrature demodulation to beat frequency electric signal, and extracts the phase change caused by acoustic wave signal.The application adopts suspended micro-nano fiber structure, eliminates mechanical resonance and damping;Combined with AOM continuous light heterodyne detection and IQ demodulation, acoustic wave signal is shifted to high frequency carrier, and environmental drift is directly filtered out by digital high-pass filter, without PZT feedback, realize never lose lock wideband high sensitivity detection.

The application discloses a music rhythm-somatic rhythm synchronous control method and system based on mechanical resonance avoidance, and the method comprises the following steps: obtaining the inherent resonance frequency, quality factor and resonance bandwidth of an electromagnetic actuator-seat coupling system; collecting an audio signal and extracting a beat frequency, which is converted into a target driving frequency; calculating the frequency distance ratio between the target driving frequency and the inherent resonance frequency; when the frequency distance ratio is less than a resonance danger threshold, performing frequency offset on the target driving frequency and compensating the amplitude-frequency response attenuation at the offset frequency through an amplitude compensation formula. Through the cooperative strategy of frequency offset and amplitude compensation, the application can maintain the perceptual consistency of the rhythm intensity while avoiding mechanical resonance, reduce the resonance zone amplitude amplification multiple, and reduce the rhythm distortion rate.

The present application relates to the technical field of textile equipment testing, in particular to a yarn textile high-speed spindle running stability testing method and system, comprising the following steps: S1. Test element layout; S2. System initialization; S3. Transient test; S4. Steady-state test; S5. Interference processing: spectrum analysis of original collected data, identification of interference frequency characteristics, combination of notch filtering and Kalman filtering to eliminate interference and verify filtering effect; S6. Parameter correlation modeling: control variable method is used to construct vibration-temperature-tension-rotation speed parameter correlation model, model parameters are solved through fitting algorithm and effectiveness is verified; S7. Quality traceability; S8. Stability determination; S9. Real-time monitoring and regulation. The present application adopts a combination filtering scheme of notch filtering and Kalman filtering, specifically suppresses fixed interference such as power frequency and mechanical resonance and random interference, through local amplified signal comparison, it can be seen that the filtered signal waveform is smooth and noise is completely removed, and the signal-to-noise ratio and reliability of the vibration detection signal are improved.

This invention belongs to the field of transformer monitoring technology and discloses an online monitoring method and related device for the internal condition of a transformer. By injecting an AC micro-current excitation signal into the low-voltage side of the transformer, voltage response, vibration response, and background power frequency current signals are simultaneously acquired. After frequency domain processing, the electromagnetic impedance spectrum and vibration transfer function spectrum are obtained. Based on the initial health state reference spectrum, the normalized electromagnetic-mechanical coupling coefficient across the entire frequency band is calculated, and a comprehensive health index is calculated by combining the winding mechanical resonance frequency, thus achieving condition monitoring. This method realizes real-time online non-destructive monitoring of transformers under normal operation, continuously tracking equipment status without power outages. Through the collaborative sensing of multiple physical quantities, the detection sensitivity for early minor winding deformation and core loosening is significantly improved, effectively capturing fault precursors and comprehensively enhancing the accuracy and reliability of condition assessment, meeting the high-precision and real-time requirements of the power grid for transformer operation and maintenance.

This utility model discloses a high-temperature resistant direct-connection vibration measurement device for a shielded electric pump, including a vibration temperature sensing element. The vibration temperature sensing element is installed on the high-temperature contact surface of the shielded electric pump, with a heat-insulating mica layer and a heat sink installed between them. The vibration temperature sensing element is connected to a vibration transmission and processing unit. The features of this utility model are: after adding the heat-insulating mica layer and heat sink, the vibration temperature sensing element can withstand temperatures above 400℃, allowing for direct installation and eliminating the need for an external metal extension section, thus avoiding vibration signal distortion caused by mechanical resonance and measurement position deviation; through the vibration temperature sensing element and the vibration transmission and processing unit, vibration data is collected in real time, combined with temperature monitoring, and analyzed and diagnosed using algorithms, enabling accurate measurement of the actual vibration state of the shielded electric pump with higher precision and stronger reliability. This allows for comprehensive monitoring of the shielded electric pump's operating status and timely detection of potential faults.