38 results about "Resonance amplitude" patented technology

The SERF gyroscope multi-parameter in-situ measurement method based on transverse magnetic field resonance first measures the amplitude-frequency characteristic curve of SERF atomic spin gyroscope Bx, By alternating current magnetic field response, then finds the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions respectively, and finally constructs an equation through the ratio of the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions, and obtains the accurate values of the electron magnetic field, the slowing factor and the electron transverse relaxation rate through the global optimization function algorithm. The present application can realize the in-situ accurate measurement of the electron magnetic field, the nuclear magnetic field, the electron polarizability, the nuclear polarizability, the slowing factor and the electron transverse relaxation rate of the SERF atomic spin gyroscope without changing the system state.

The invention relates to the technical field of non-electrical variable adjustment, and discloses a path adjustment method for an aircraft transfer platform in a multi-layer transfer scene, which comprises the following steps: acquiring the quality of a controlled object borne by a first positioning unit, mapping the fundamental frequency resonance amplitude of a system based on the quality of the controlled object, and setting a dynamic dead zone threshold value; translating the physical displacement deviation into a feature node coordinate in a parameterized spatial map, extracting an instantaneous geometric feature of a non-uniform rational B-spline curve and converting the instantaneous geometric feature into a driving compensation vector, monitoring a pose deviation generated by residual mechanical oscillation of the first positioning unit, and when the pose deviation exceeds a dynamic dead zone threshold value, determining that the first positioning unit is in a dynamic dead zone; according to the method, a static waiting time sequence is reconstructed into a dynamic accompanying compensation process, the restriction of mechanical oscillation on the operation rhythm is eliminated, and the material flow volume of a transfer system is increased.

The present application relates to the technical field of magnetic levitation equipment design, and discloses a method, device and equipment for identifying the structural characteristic parameters of a base, wherein the base is used to install the magnetic levitation equipment, a displacement sensor is configured on the magnetic levitation equipment, and an axial dynamic model is pre-established for the magnetic levitation equipment and the base. The method includes: applying an excitation signal to the base, collecting the axial displacement of the magnetic levitation equipment through the displacement sensor; determining the resonant frequency and resonance amplitude of the magnetic levitation equipment according to the axial displacement; solving the resonance frequency, resonance amplitude and the resonance characteristic relationship of the base to obtain the structural characteristic parameters of the base; wherein the resonance characteristic relationship of the base is obtained by system identification based on the axial dynamic model, and the structural characteristic parameters are used to guide the design of the base. Its beneficial effect is that the coupling between the magnetic levitation equipment and the base is taken into account, the identification accuracy of the structural characteristic parameters of the base is improved, and the cost required for the identification process is reduced.

The present application relates to the technical field of tooling, and particularly relates to a resonance loosening method and system for a casing-coupling sub-system. The method comprises: obtaining a make-up torque of the casing-coupling sub-system, determining a maximum loosening torque according to the make-up torque; determining basic parameters of the casing-coupling, establishing a finite element model according to the basic parameters, carrying out modal simulation analysis and test measurement according to the finite element model, and determining an inherent frequency of the casing-coupling sub-system, a position of an excitation point and an excitation acceleration; according to the excitation point and the excitation acceleration, a middle / high frequency excitation device is used to apply vibration excitation under the inherent frequency to the casing-coupling sub-system, a larger resonance amplitude and resonance acceleration are excited in the casing-coupling sub-system, a violent transverse or longitudinal swing is generated at the coupling, a loosening effect is generated, the loosening torque of the casing-coupling sub-system is significantly reduced, and efficient unmake-up is ensured.

The present invention discloses a multiple dynamic vibration absorber applied in an asymmetric rotor system and a design method thereof. The rotating shaft of the asymmetric rotor system has non-axisymmetric characteristics or the supporting structure has non-isotropic characteristics, and there are problems of excessive vibration and instability when passing through the critical speed and the 1 / 2 critical speed. The multiple dynamic vibration absorber is composed of an annular base and a plurality of cantilever beam oscillators, and is installed on the rotating shaft through rolling bearings. The multiple dynamic vibration absorber does not rotate with the asymmetric rotor system. The cantilever beam oscillators are equidistantly installed along the circumferential direction on the annular base, and the average value of their natural frequencies is close to the center frequency of the instability zone frequency band of the asymmetric rotor system. During the operation of the asymmetric rotor system, the cantilever beam oscillators absorb part of the vibration energy of the system. By optimizing the structural parameters of the multiple dynamic vibration absorber, the damping level of the system is greatly improved, the resonance amplitude at the critical speed of the system is reduced, and the instability phenomenon of the system is suppressed.

The invention discloses a micro-boring deep small hole automatic tool setting method based on resonance excitation, and relates to the technical field of micro-boring deep small hole machining tool setting detection.The method comprises the steps that an accurate micro-boring tool resonance mode is obtained through simulation and experimental analysis methods, and the resonance amplitude and the resonance frequency in the cutting depth direction are extracted; on the premise that the feeding of the machine tool is far away from the resonant frequency, an external resonant vibration source is adopted to excite the tip of the micro-boring cutter to generate resonance in the cutting-in direction, the maximum resonance amplitude exists at the tip, and the tip of the micro-boring cutter gradually approaches the inner wall surface of the deep small hole through the micro-feeding amount feeding of the micro-boring cutter in the cutting-in direction; the detection and the primary alarm of a tool touch signal are realized through a conductive and magnetic conductive path connected between the deep small hole metal piece and the tool nose of the micro-boring tool, namely, the secondary feeding distance of the micro-boring tool in the cutting depth direction is determined to be not greater than the distance corresponding to the maximum resonance amplitude at the tool nose; according to the method, the tool setting sensitivity and precision of the method can be improved through subdivision processing of the touch electromagnetic alarm signal.

The invention discloses a collision damping dynamic vibration absorber for blade disc vibration reduction, which is characterized in that a wheel disc forming a blade disc and blades on the periphery of the wheel disc are an integrated component formed integrally, collision damping dynamic vibration absorption units are arranged on the inner circumferential surface of the wheel disc along the circumferential direction, and T-shaped components and collision limiting blocks are arranged in window frames on annular panes; leaf disc modal information corresponding to the controlled frequency range is obtained through modal testing or modal analysis, and the T-shaped component and the leaf disc are set to have the same inherent frequency; and parameter matching is carried out on the collision damping dynamic vibration absorption unit and the modal vibration mode in the controlled frequency range of the blade disc, so that the collision damping dynamic vibration absorption unit corresponds to the n-order modal vibration mode of the blade disc, and vibration of the blade disc with the vibration amplitude exceeding the limit is restrained. Vibration reduction of the blade disc is achieved, the common amplitude value of the blade disc within the controlled frequency range is effectively reduced by limiting the vibration amplitude of the T-shaped component, the vibration stress of the T-shaped component is reduced, and the working stability and reliability of the blade disc are remarkably improved.

Provided is an integrated micro-electromechanical systems (MEMS) ultrasonic transducer (UT). The integrated MEMS UT (MUT) includes a capacitive MUT body, and a piezoelectric structure provided on a resonant plate of the capacitive MUT body. In embodiments of the present disclosure, the piezoelectric structure forms a piezoelectric MUT with the resonant plate and a chamber in the capacitive MUT body, and the piezoelectric MUT and the capacitive MUT body share the resonant plate to obtain the integrated MUT. The embodiments of the present disclosure integrate the advantages of piezoelectric MUT and the capacitive MUT, and achieve the effect of improving the receiving sensitivity while not affecting the resonance amplitude and the output sound pressure.

The utility model discloses an anti-vibration structure of a material pushing centrifugal machine without a counter weight. The lower base plate is fixed on the mounting platform, the upper base plate is connected with the centrifugal machine, and the first buffer pads and the second buffer pads are respectively mounted between the lower base plate and the upper base plate and on the upper base plate and are used for reducing the vibration amplitude and the vibration frequency of the centrifugal machine. The first buffer pad and the second buffer pad are respectively arranged between the upper base plate and the lower base plate and on the upper base plate, so that the vibration generated during the operation of the centrifugal machine is blocked by the first buffer pad and the second buffer pad, the energy is dissipated, the vibration amplitude and the vibration frequency of the centrifugal machine are reduced, the stable operation of the centrifugal machine is ensured, and the service life of the centrifugal machine is prolonged. And moreover, the use cost is also reduced, and meanwhile, the effects of reducing the resonance amplitude of a mechanical structure and weakening vibration transmission are also achieved.

A method for examining a robot apparatus which includes a driving source configured to drive a joint, the position and orientation of which are controlled based on trajectory data determined in advance for a normal motion. The examination method includes generating examination motion data for driving a joint as an examination target under a driving speed that causes the examination target joint to resonate and causing the examination target joint to pass through a path based on the trajectory data. A resonance amplitude of the joint is acquired based on the examination motion data.

The invention discloses a piezoelectric film acoustic sensor packaging design method, device and system, and the method comprises the steps: obtaining a pre-constructed multi-physical field coupling optimization model, a target function of the multi-physics field coupling optimization model is constructed by taking maximization of sound pressure sensitivity, minimization of frequency deviation and minimization of a parasitic common amplitude value as targets; a Bayesian global optimization algorithm is adopted, the multi-physics field coupling optimization model is solved, piezoelectric film acoustic sensor packaging parameters are obtained, a CNN model is adopted as an agent optimization model in the Bayesian global optimization algorithm and used for fitting a target function of the multi-physics field coupling optimization model, and in the solving process, the packaging parameters of the piezoelectric film acoustic sensor are obtained. The weights of different optimization sub-targets are dynamically adjusted according to the environmental parameters, and the optimization sub-targets comprise the maximum sound pressure sensitivity, the minimum frequency deviation and the minimum parasitic common amplitude value. The anti-interference performance and the stability of the piezoelectric film acoustic sensor can be improved.

The present application discloses a method and system for measuring a magnetic moment parameter, a storage medium, and an electronic device. The method comprises: measuring, under a target gradient field, a resonant frequency and a resonance amplitude of a sample rod with a magnetic sample to be measured mounted thereon, wherein the target gradient field is generated by a magnetic field system; acquiring a mass of the magnetic sample to be measured, and determining, according to the mass, the resonant frequency, and the resonance amplitude, a magnetic force exerted on the magnetic sample to be measured within the target gradient field; and determining, according to the magnetic force exerted on the magnetic sample to be measured and a current parameter of a gradient coil within the magnetic field system, a magnetic moment parameter of the magnetic sample to be measured. The present application addresses the problems in the related art of high equipment costs and low measurement accuracy when performing magnetic measurements on magnetic samples to be measured.

A detection method and system for an optical microcavity sensor. The detection method for an optical microcavity sensor is applied to an optical mode localization effect-based optical microcavity sensor. The detection method for an optical microcavity sensor comprises: acquiring an output spectrum of an optical mode localization effect-based optical microcavity sensor, the output spectrum comprising a symmetric peak and an antisymmetric peak; measuring, in the output spectrum, a first resonance amplitude corresponding to the symmetric peak and a second resonance amplitude corresponding to the antisymmetric peak; and on the basis of the first resonance amplitude and the second resonance amplitude, demodulating to obtain a target detection physical quantity of the optical mode localization effect-based optical microcavity sensor. On the basis of the resonance amplitudes of the symmetric peak and the antisymmetric peak, the target detection physical quantity is obtained by means of demodulation, thereby realizing accurate measurement of the target detection physical quantity, and reducing the effect of physical quantity changes in the environment.

The application provides a kind of capacitance measuring device, method and chip probe test system.The capacitance measuring device includes probe plate and capacitance measuring circuit, probe plate includes probe, and capacitance measuring circuit includes LC resonant circuit and current drive unit.LC resonant circuit is used to be connected in parallel with the two poles of probe and the chip to be measured, LC resonant circuit has no-load state and loaded state, when probe and the chip to be measured do not contact, LC resonant circuit is in no-load state;When probe and the chip to be measured are in contact, LC resonant circuit is in loaded state.Current drive unit is used to provide driving current for LC resonant circuit, to make LC resonant circuit produce resonance, and resonance amplitude is lower than the opening voltage of the diode inside the chip to be measured.Capacitance measuring device is used to obtain the capacitance of the chip to be measured based on the data of the resonance waveform of LC resonant circuit in loaded state and no-load state, by calculating processing to obtain the capacitance offset of LC resonant circuit.

The present invention relates to the field of shock absorber technology, and discloses a method, system, vehicle and storage medium for handling semi-active shock absorber faults, wherein the method comprises: obtaining the initial resonance amplitude of all shock absorbers on the vehicle; obtaining the current resonance amplitude of all shock absorbers during the driving process of the vehicle; determining the fault state of the shock absorber according to the initial resonance amplitude and the current resonance amplitude corresponding to the same shock absorber; and generating the shock absorber fault identification result of the vehicle according to the fault state corresponding to all the shock absorbers. The present invention realizes automatic and accurate identification of shock absorber faults without the need to install additional force sensors on the shock absorber. The present invention has high fault identification accuracy and short cycle for shock absorbers, is easy to implement, and does not require manual cooperation, thus saving costs and improving user experience.

The utility model relates to a low-noise operation negative pressure weighing cover structure, which comprises a first box body and a fan, the weighing cover structure further comprises a second box body, the second box body is arranged at the top end of the outer side of the first box body, the fan is arranged in the second box body, the second box body is connected with the first box body through a support, and the fan is arranged in the second box body. A damping piece is arranged at the joint of the bracket and the second box body; the weighing cover structure further comprises a first air pipe and a second air pipe, and the first air pipe and the second air pipe are connected to the first box body and the second box body respectively. According to the negative pressure weighing cover, on the basis of a traditional negative pressure weighing cover, the draught fan and the draught fan box are installed on the top of equipment, the structure of a room is fully utilized, and noise is reduced; and meanwhile, by researching vibration, adding a damping piece, reducing resonance amplitude and reducing noise, under the condition that a sound insulation device is not used, the harm of noise to workers and the pollution to the environment are reduced, and the production efficiency is improved.

The present invention relates to the fields of biomedicine and sensor technology, and discloses a vibration detection sensor for liquid detection based on the vibration principle and its application. The vibration detection sensor includes a columnar insulator, at least two metal conductors with different heights arranged on the surface of the columnar insulator, and pins arranged on the columnar insulator for connecting with the metal conductors; the metal conductors with different heights are not connected to each other; the pins are respectively connected to the metal conductors with different heights. The vibration detection sensor forms a conductive path between the metal conductors with different heights by arranging the metal conductors with different heights and utilizing the conductivity of the liquid; when resonance occurs, the vibrating liquid forms a conductive path between the metal conductors with different heights, is connected to the detection circuit through the pins, and the signals output by different metal conductors are detected, so as to reflect the change of the liquid resonance amplitude and the change of the resonance frequency, and to master the change process of the physical and chemical properties of the liquid. The vibration detection sensor is more sensitive and the detection result is more accurate.

To provide a cell separation device enabling appropriate control and efficient cell separation regardless of the combination with a culture substrate.SOLUTION: A signal output unit that outputs an AC signal, a vibration member that vibrates according to a frequency of the AC signal, a vibration transmission member that transmits vibration of the vibration member to the base material, an amplitude detection unit that detects an amplitude of vibration of the vibration transmission member, a resonance information acquisition unit that acquires resonance information, and a drive control unit that controls output of the AC signal based on the amplitude detected by the amplitude detection unit and the resonance information, wherein the resonance information includes resonance point information that is information related to a resonance amplitude peak of the vibration transmission member, the drive controller controls the output of the AC signal within a predetermined range between the frequency corresponding to a peak top and the frequency corresponding to one of a peak start and a peak end of the one resonance amplitude peak.SELECTED DRAWING: Figure 1

The invention belongs to the field of microwave measurement and magnetic material characterization, and relates to a grounding coplanar waveguide clamp for broadband ferromagnetic resonance test, which comprises a dielectric substrate (thickness h), a central signal line and a metal conductor layer on the upper surface of the dielectric substrate, and a grounding conductor plane on the lower surface of the dielectric substrate, the interval gap between the central signal line (width s) and the metal conductor layers on the two sides is a slot line, and the width is w; through holes are formed in the metal conductor layer, and the metal conductor layer is electrically connected with the grounding conductor plane through each through hole, so that a grounding coplanar waveguide structure is formed; the method comprises the following steps: defining dimensionless parameters u = w / (w + 2s) and eta h = h / (w + 2s), and limiting the dimensionless parameters to meet 0.35 < = u < = 0.50 and 0.15 < = eta h < = 0.26, and obtaining a higher resonance amplitude, a lower baseline ripple and a higher signal-to-noise ratio while keeping 50 omega + / -5% matching. The clamp is simple in structure, easy to machine and suitable for high-frequency magnetic measurement scenes such as ferromagnetic resonance and vector networks.

The application discloses a micro magnetic sensor combined with electromagnetic induction and Lorentz force and a preparation method thereof. The sensor comprises a high-frequency resonance component, a low-frequency resonance component and a coupling beam between the two components. The high-frequency resonance component comprises a driving electrode, a high-frequency resonance structure, a first insulating layer on the side of the high-frequency resonance structure, a Lorentz force driving coil, a second insulating layer on the side of the high-frequency resonance structure, a metal shielding layer, a third insulating layer on the side of the high-frequency resonance structure and an electromagnetic induction coil. The low-frequency resonance component comprises an induction electrode, a low-frequency resonance structure, an insulating layer on the side of the low-frequency resonance structure and a metal coil. The application establishes a composite magnetic sensitive architecture of electrostatic driving-electromagnetic induction and Lorentz force driving-electrostatic sensitivity on the internal resonance coupling structure, so as to improve the magnetic sensing performance through the superposition of two types of magnetic sensitive output signals. Meanwhile, the low-frequency resonance amplitude amplification effect of internal resonance is utilized to realize that the low-frequency resonance structure plate capacitor serves as a magnetic sensing signal output, so as to reduce the power consumption of the Lorentz force type magnetic sensitive element.

The application discloses a kind of musical instrument audio signal intelligent analysis methods based on clancy figure, it is related to musical instrument manufacturing technical field, steps include: obtaining clancy figure, extracting symmetry axis angle distribution and wood texture main direction and obtaining offset angle;Wood texture anisotropic distribution area is identified based on offset angle, determine abnormal resonance energy propagation path, combine edge detection calculation panel vibration uniform area ratio, obtain resonance frequency purity percentage;With offset angle, correlation strength is constructed, input preset mapping obtains length-width modulus ratio fusion result, combined with finite element simulation to obtain panel cutting angle adjustment amount;According to adjustment amount, update modulus ratio, geometric symmetry coverage area ratio and energy dissipation space position distribution;Compare distribution before and after optimization, evaluate abnormal resonance amplitude reduction and symmetry axis angle distribution, determine the matching relationship and optimization direction of texture and symmetry axis, output final cutting angle scheme.

The application discloses a double-dimension multi-gas sensor based on artificial plasmons and a gas detection system, wherein the sensor comprises, from bottom to top, a grounding plate, a dielectric substrate, a metal microstrip transmission line, a bottom sensitive dielectric layer, an artificial plasmon resonator and a first conductive layer and a second conductive layer at the same height level; the sensor is based on a vertical laminated structure to construct single-resonator double-dimension orthogonal decoupling; wherein the artificial plasmon resonator and the bottom sensitive dielectric layer construct a response mechanism of 'bottom dielectric constant-resonance frequency shift' to a target gas A; the artificial plasmon resonator and the first conductive layer and the second conductive layer construct a response mechanism of 'top layer conductivity-resonance amplitude modulation' to a target gas B. The application utilizes a vertical laminated structure to construct two independent detection dimensions on the projection area of only one single resonator, and realizes simultaneous detection and decoupling of two gases.

The application discloses a piezoelectric thin film acoustic sensor packaging design method, device and system, the piezoelectric thin film acoustic sensor packaging design method includes obtaining a pre-constructed multi-physical field coupling optimization model, the objective function of the multi-physical field coupling optimization model is constructed to maximize the sound pressure sensitivity, minimize the frequency offset and minimize the target function of the parasitic resonance amplitude; a Bayesian global optimization algorithm is used to solve the multi-physical field coupling optimization model to obtain the piezoelectric thin film acoustic sensor packaging parameters, the CNN model is used as the proxy optimization model in the Bayesian global optimization algorithm, which is used to fit the objective function of the multi-physical field coupling optimization model, and in the solving process, the weights of different optimization sub-targets are dynamically adjusted according to the environmental parameters, and the optimization sub-targets include maximizing the sound pressure sensitivity, minimizing the frequency offset and minimizing the parasitic resonance amplitude. The application can improve the anti-interference and stability of the piezoelectric thin film acoustic sensor.

The utility model relates to the technical field of compressor air pipe vibration reduction, in particular to a compressor air pipe vibration reduction seat. The device comprises a gas pipe clamping seat, a gas pipe mounting cavity is formed in the center of the gas pipe clamping seat, a gas pipe is arranged in the gas pipe mounting cavity, and a gap is reserved between the gas pipe and the side wall of the gas pipe mounting cavity; a plurality of vibration reduction assembly installation cavities are formed in the air pipe clamping base, a telescopic vibration reduction assembly is arranged in each vibration reduction assembly installation cavity, and one end of each vibration reduction assembly extends into the corresponding air pipe installation cavity and makes contact with the outer surface of the air pipe in a pressing mode. The damping pad can reduce the resonance amplitude of a mechanical structure, so that structural damage caused by the fact that dynamic stress of a refrigerating system pipeline reaches the limit is avoided, the damping pad is beneficial for a pipeline system to quickly recover to a stable state after the pipeline system is subjected to instantaneous impact, the damping pad reduces sound radiation generated by co-vibration of the refrigerating pipeline system, mechanical noise is reduced, and the service life of the refrigerating pipeline system is prolonged. And the damping pad is favorable for reducing the vibration transmission capability of the pipeline system.

The invention discloses an energy storage cooperative control method with resonance suppression, and belongs to the technical field of energy storage system control. Comprising the following steps: 1) collecting operation state parameters of multiple energy storage units and electrical quantity data of a grid-connected point, and identifying resonance characteristics such as resonance frequency, a common amplitude value and a resonance attenuation coefficient in real time in a mode of combining frequency domain analysis and modal identification; 2) adaptively determining a dynamic resonance suppression factor according to the resonance characteristic parameters, establishing a multi-objective optimization rule in combination with the power response capability, residual capacity and loss characteristics of the energy storage unit, and generating a cooperative control strategy with resonance suppression; a resonance suppression mechanism is deeply integrated into cooperative control, coupling optimization of the two is realized through dynamic resonance suppression factors, the common amplitude suppression ratio is high, and system oscillation is effectively avoided; by adopting a real-time resonance identification and closed-loop adjustment mechanism, the dynamic resonance characteristics under complex working conditions are adapted, the power response delay is low, and the dynamic response performance of the system is improved.

The invention discloses a millisecond-level power compensation control method, which belongs to the technical field of energy storage system control, and comprises the following steps: 1) collecting operation data of an energy storage system, including power grid side voltage and current signals, output power of each energy storage unit, SOC of the energy storage unit and power grid frequency deviation; (2) an improved FFT wavelet transform fusion algorithm is adopted for resonance detection, a resonance frequency interval is rapidly positioned, resonance characteristic parameters are finely extracted, and the resonance characteristic parameters comprise the resonance frequency, the common amplitude value and the resonance attenuation coefficient; 3) constructing a cooperative control objective function containing a resonance suppression weight, and taking power grid frequency stability, power grid voltage stability, energy storage unit SOC equalization and co-amplitude value minimization as optimization objectives; according to the invention, integrated control is realized, resonance detection, active suppression and multi-target cooperative control are deeply fused, the problem that resonance detection and active suppression conflict with multi-target cooperative control in the prior art is solved, the operation stability of the energy storage system is greatly improved, and interference of resonance to cooperative control is avoided.

The application discloses an optimization method and system for improving the scanning angle of an electrostatic MEMS (Micro Electro Mechanical System) mirror, which comprises the following steps: establishing a dynamic equation of the electrostatic MEMS mirror, obtaining a driving torque, and establishing a driving torque expression; establishing a finite element model of a driver with different comb-to-shaft distances, simulating the finite element model, obtaining the relationship between the capacitance of different drivers and the angle, fitting the obtained relationship between the capacitance of different drivers and the angle, and obtaining a driver capacitance expression; obtaining an expression of a resonance amplitude based on the obtained driver capacitance expression, the driving torque expression and the dynamic equation of the electrostatic MEMS mirror, and obtaining the resonance amplitude of the electrostatic MEMS mirror under different comb-to-shaft distances based on the expression of the resonance amplitude; and selecting the comb-to-shaft distance corresponding to the maximum value in all resonance amplitudes to optimize the driver of the MEMS mirror. The MEMS mirror can reach the maximum scanning angle, thereby meeting the demand of the electrostatic MEMS mirror in a large field of view application scenario.

The invention relates to the technical field of tools, in particular to a resonance unbuckling method and system for a sleeve-coupling subsystem. The method comprises the steps that the make-up torque of a casing-coupling subsystem is obtained, and the maximum release torque is determined according to the make-up torque; basic parameters of the casing-coupling are determined, a finite element model is established according to the basic parameters, modal simulation analysis and experimental testing are carried out according to the finite element model, and the inherent frequency, the position of an excitation point and the excitation acceleration of the casing-coupling subsystem are determined; according to the excitation point and the excitation acceleration, a medium / high frequency excitation device is adopted to apply vibration excitation under the inherent frequency to the sleeve-coupling subsystem, and large resonance amplitude and resonance acceleration are excited in the sleeve-coupling subsystem, so that violent transverse or longitudinal swing is generated at the coupling position, the unfastening effect is generated, and the coupling is prevented from being loosened. And the unbuckling torque of a sleeve-coupling subsystem is obviously reduced, and high-efficiency unbuckling is guaranteed.

The present invention relates to a method for generating a timbre library, a sound synthesis method and system, an audio processing chip, a computer-readable storage medium, and an electronic device. In the method for generating the timbre library, a first amplitude spectrum is first calculated for a windowed sound source audio frame, and the first amplitude spectrum is used to update an average amplitude spectrum, and similarity is calculated for each peak greater than an amplitude threshold in the first amplitude spectrum and a low-pass kernel, and then the largest value in the result and its corresponding low-pass kernel and local maximum peak are selected to form a similar data group, and then the similar data group is used to compensate the probability value in the probability table, and then the center frequency, bandwidth, and maximum amplitude of the resonance amplitude characteristics of the sound source signal are found from the compensated probability table and the average amplitude spectrum. Obviously, the method for generating the timbre library of the present invention greatly simplifies the algorithm for generating the timbre library, improves the generation efficiency of the timbre library, and can save resources.

An in-ear earphone device for insertion into a person's ear canal is disclosed. The in-ear earphone device comprises a noise microphone, a loudspeaker and a signal processor arranged to provide an active noise control signal based on a recorded audio signal from the noise microphone, wherein the loudspeaker is arranged to reproduce the active noise control signal in the ear canal. In addition, the device comprises a damped vent comprising one or more vent elements and one or more dampening elements, the damped vent being arranged to couple the ear canal to an external acoustic environment. The damped vent is characterized by an inward vent transfer function H VI from the external acoustic environment to the ear canal. The damped vent is arranged to dampen an acoustic resonance of the one or more vent elements such that the inward vent transfer function H VI has a resonance amplitude ratio in a resonance frequency range from 100 Hz to 2 kHz of at most 3 dB. The damped vent is arranged to provide a reference amplitude in a reference frequency range from 20 Hz to 100 Hz of at most 3 dB larger than the inward vent transfer function H VI .