40 results about "Harmonic oscillator" patented technology

The invention relates to a hemispherical resonator and hemispherical gyroscope parameter and defect identification system and method, and belongs to the technical field of hemispherical resonator gyroscopes. According to the invention, automatic identification of damping non-uniformity, rigidity non-uniformity and 1-3-order quality defect parameters is respectively carried out on the fused quartz hemispherical resonator before and after film coating and the gyroscope header after base assembly, so that the full-flow coverage test of the hemispherical resonator gyroscope is realized; various parameters are identified in the whole process from harmonic oscillator machining forming to the gauge outfit state, the testing precision, the system reusability, the operation convenience and consistency are greatly improved, and the production efficiency is improved.

The invention discloses a detection device and a detection system for harmonic oscillator capacitors of a hemispherical resonator gyroscope, and relates to the technical field of capacitor detection, the detection device comprises a signal detection circuit, a modulation compensation circuit, a differential amplification circuit and a control circuit, the signal detection circuit is connected with the output ends of the two harmonic oscillator capacitors; the modulation compensation circuit is correspondingly connected with two input ends of the signal detection circuit; the differential amplification circuit is correspondingly connected with two output ends of the signal detection circuit; the control circuit is configured to output modulation voltage to the two input ends of the modulation compensation circuit according to a voltage signal of the output end of the differential amplification circuit, and zero setting is carried out on voltage at the connecting positions of the two output ends of the modulation compensation circuit and the two input ends of the signal detection circuit. According to the invention, the modulation compensation circuit is adopted to enable the output ends of the two harmonic oscillator capacitors to work near zero voltage, the circuit has the characteristics of ultrahigh linearity, extremely low temperature drift, rapidness and stability, errors caused by power supply drift can be eliminated, and the detection precision is improved.

A recurrent neural network includes a plurality of n damped harmonic oscillators (DHOi), each of the n damped harmonic oscillators being one cell (nci) of the neural network, an input unit (IU) that receives and inputs time-series input data (S (t)), a recurrent connection unit (RCU) that includes, for each of the cells (nci), at least one connection (wi,j) between the input / output node (IOi) of the corresponding cell (nci) and the input / output node (IOj) of at least another one of the cells (ncj) for transmitting the resulting damped harmonic oscillation (hi) output from the input / output node of the corresponding cell (nci) to the input / output node of the another one of the cells (ncj).

The invention discloses an electrostatic tuning optimization method and device for a metal resonator gyroscope. The method comprises the following steps: establishing a dynamic model based on structural symmetry disturbance and a coupling stiffness effect; based on the dynamic model, calculating modal frequency distribution of the metal resonator gyroscope under different azimuth angles to obtain modal frequency difference data, and based on the modal frequency difference data, constructing an equivalent stiffness distribution model, and quantifying stiffness nonuniformity of the resonant structure to obtain a stiffness matrix; based on the stiffness matrix, voltage control parameters corresponding to the azimuth angles are obtained, the voltage control parameters are applied to the multiple electrostatic tuning electrodes, and an optimized stiffness matrix is obtained; and recalculating the modal frequency of the metal harmonic oscillator based on the optimized stiffness matrix. The invention solves the technical problem that the prior art is mainly suitable for the inertial device before or after packaging but is difficult to effectively eliminate the frequency cracking after packaging.

The invention belongs to the technical field of precision machining, and relates to a control method for optimizing and uniformly removing a hemispherical harmonic oscillator polishing flow channel tool head, which comprises the following steps of: 1, machining a flow channel base; step 2, establishing a model capable of uniformly removing a height runner on the surface of the workpiece; 3, analyzing and calculating the linear velocity of the hemispherical surface to obtain the linear velocity distribution of the surface of the workpiece in the polishing process; 4, constructing a stress distribution model influencing spherical polishing; 5, according to the linear velocity and pressure distribution modeling of the surface of the polished workpiece and the material removal height, a proper machining gap between the runner and the workpiece is obtained through calculation; according to the method, the wall surface geometrical shape of the polishing flow channel is accurately optimized, the flow field characteristics are actively regulated and controlled, cooperative matching of workpiece surface pressure distribution and a fluid velocity field is achieved, and therefore the uniformity of workpiece surface material removal by a polishing medium is remarkably improved.

The application discloses a rate integration hemispherical resonator gyro angular rate output method, and belongs to the technical field of inertial technology. The application is aimed at solving the problem of large measurement noise of standing wave azimuth angle and poor gyro output precision in the existing rate integration hemispherical resonator gyro control method. In the application, the inherent working frequency of the gyro is taken as the initial value of the forward traveling wave frequency and the reverse traveling wave frequency, and the reference signals of the forward traveling wave and the reverse traveling wave are calculated and obtained; the reference signals are used to demodulate the electrode detection signals by using a low-pass filter, and the secondary demodulation quantity of the gyro angular rate is obtained by using the primary demodulation quantity; the phase difference between the forward traveling wave and the reverse traveling wave of the two groups of electrode detection signals and the forward traveling wave and the reverse traveling wave reference signals is calculated; the forward traveling wave and the reverse traveling wave reference signals are used to calculate the closed-loop real-time tracking of the forward traveling wave and the reverse traveling wave of the hemispherical resonator, and the sensitive axis angular rate measurement value of the rate integration hemispherical resonator gyro is calculated. The application is used for the angular rate output control of the rate integration hemispherical resonator gyro.

The invention relates to a three-axis gyroscope, in particular to a full-decoupling nested wheel ring monolithic three-axis MEMS gyroscope chip, which comprises a harmonic oscillator part and an electrode part, the harmonic oscillator part comprises a wheel structure and a ring structure, the wheel structure comprises a circular anchor block, an annular frame A coaxially arranged on the outer side of the circular anchor block in a sleeving mode and an annular frame B coaxially arranged on the outer side of the annular frame A. Four arc-shaped frames are arranged between the annular frame B and the annular frame A. An arc-shaped mass block is arranged in each arc-shaped frame. The ring structure comprises N annular mass blocks, eight arc-shaped anchor blocks B and eight groups of straight suspension beams B, the N annular mass blocks are sequentially and coaxially arranged on the outer side of the annular frame B in a sleeving mode from inside to outside, the eight arc-shaped anchor blocks B are all connected to the inner side face of the annular mass block located on the innermost side, and each group of straight suspension beams B comprises N-1 straight suspension beams B. The three-axis gyroscope solves the problems that an existing three-axis gyroscope is poor in reliability and low in measurement precision, and is suitable for high-precision and advanced fields such as military navigation and automatic driving.

The application discloses a kind of based on CadencePspice software's hemispherical resonator gyro circuit model, is realized by calling the built-in element of CadencePspice software;Including: drive module, for providing an excitation signal;First conversion module, for converting excitation signal into the first signal f (x) representing x-axis electrostatic force;First simulation module, for simulating the second signal x representing the vibration displacement of x-axis and y-axis based on first signal f (x), third signal y;Second simulation module, for simulating the change of the capacitance value between resonator and detection electrode based on second signal x and third signal y, ninth signal v0, tenth signal v90, eleventh signal v45, twelfth signal v135;And second conversion module, for carrying out charge amplification processing based on ninth signal v0, tenth signal v90, eleventh signal v45, twelfth signal v135 and output corresponding detection signal.The application can improve the accuracy of simulation.

The invention provides a hemispherical resonator gyroscope error harmonic wave identification method and a hemispherical resonator gyroscope error harmonic wave identification device. The hemispherical resonator gyroscope comprises a hemispherical resonator and an electrode for vibration excitation and vibration displacement detection. The method comprises the following steps: applying electric excitation to the electrode of the hemispherical resonator gyroscope; detecting and resolving electric signals of different electrodes to obtain a displacement relationship between a working mode and a coupling mode of the standing wave shaft vibration of the hemispherical harmonic oscillator under a preset circumferential angle; enabling a standing wave axis of the hemispherical resonator to traverse the whole circumference by controlling the working mode of the hemispherical resonator gyroscope, so as to obtain a displacement relationship between a working mode and a coupling mode under different circumferential angles; the size of error harmonics and circumferential azimuth information of the hemispherical resonator gyroscope are extracted according to the displacement relation between the working mode and the coupling mode under different circumferential angles.

Provided are: a vibration portion having a base portion having a front end and a rear end facing the front end, and a plurality of vibration arms having fixed ends connected to the front end of the base portion and extending in a direction away from the front end, the plurality of vibration arms including at least one first vibration arm and a pair of second vibration arms on both sides of a first vibration arm group including the at least one first vibration arm in a direction crossing a long side direction; a holding portion provided at least partially around the vibration portion; and a holding arm having one end connected to the base portion and the other end connected to the holding portion, the plurality of vibration portions each having a piezoelectric film, and a lower electrode and an upper electrode facing each other with the piezoelectric film interposed therebetween, and a connection wiring connecting the upper electrodes of the pair of second vibration arms to each other is provided in a region of at least one of the base portion and the holding arm.

This application discloses a method, apparatus, device, and medium for nonlinear drive gain compensation of a hemispherical resonator gyroscope, relating to the field of gyroscope attitude control technology. The method includes: exciting a resonator with different frequency drive voltages and obtaining a first amplitude control voltage and a second amplitude control voltage corresponding to the resonator maintaining a preset constant amplitude; determining target parameters based on the first and second amplitude control voltages; obtaining the real-time vibration state of the target hemispherical resonator gyroscope operating in full-angle mode; determining a target drive gain correction coefficient based on the real-time vibration state and target parameters; and compensating for the nonlinear drive gain of the hemispherical resonator gyroscope based on the target drive gain correction coefficient. By obtaining different voltages corresponding to the resonator maintaining a preset constant amplitude and obtaining parameters characterizing the nonlinearity of the gyroscope drive, interference from other error sources is avoided, and the problem of incomplete compensation is solved.

The invention relates to a special tool for testing and trimming mass distribution defects of an uncoated harmonic oscillator, and belongs to the field of testing and trimming of quartz hemispherical harmonic oscillators. The lower base and the upper base are each of a cylindrical structure which is vertically arranged in the axial direction. The upper base is coaxially arranged at the top of the lower base; the transmission shaft is axially and vertically arranged at the axis of the upper base and the lower base; the two groups of ball bearings sleeve the upper and lower ends of the transmission shaft respectively; the ball bearing located on the upper portion is arranged on the inner wall of the upper base. The ball bearing located on the lower portion is arranged on the inner wall of the lower base. Taper holes are formed in the top ends of the transmission shafts; the collet chuck is embedded into the taper hole; the locking nut is sleeved on the outer wall of the joint of the collet and the transmission shaft; the interdigital capacitor seat is coaxially arranged at the top end of the upper base; the interdigital capacitor is coaxially mounted at the top of the interdigital capacitor seat; the fixed stud is mounted at the top of the collet chuck; according to the invention, the uncoated harmonic oscillator and the interdigital capacitor can be fixed, the harmonic oscillator can rotate relative to the interdigital capacitor, and the gap between the harmonic oscillator and the interdigital capacitor is ensured.

The application discloses a kind of open loop hemispherical resonator gyro error identification methods, the vibration energy of the resonator mainly collected as the input of algorithm, and after following processing: 1) by tracking differentiator reduces initial error, effectively solve the contradiction of overshoot and rapidity, reduce external compensation energy, reduce drive voltage consumption;2) by extended state observer to track the variable trend of hemispherical gyro in real time, the degree of dependence on model is low;3) by nonlinear state error feedback control law to eliminate noise strong and robustness strong anti-interference.Solve the technical problems that prior art exists system stability, control precision is not high.

The utility model relates to a harmonic oscillator machining device which comprises a rotary table, a clamp base and a clamp, the rotary table comprises a fixing frame and a rotating source, the clamp base is connected with the rotating source, the clamp is arranged on the clamp base and used for clamping harmonic oscillator bars, and the harmonic oscillator machining device is characterized by further comprising a bearing, a polishing box and a connecting block. The bearing sleeve is arranged on the clamp base, a bearing outer ring is sleeved with the bearing sleeve, the polishing box is of a semi-closed structure formed by a bottom wall and a side wall, and the end, away from the bottom wall, of the polishing box is an open end; the detachable polishing box is installed on the bearing sleeve, the connecting block is arranged to limit the polishing box to synchronously rotate along with the bearing sleeve, polishing operation can be carried out after polishing liquid is added into the polishing box, no additional polishing liquid supply system needs to be added in the process, the polishing liquid cannot be mixed with cutting liquid, and the polishing effect is good. And after polishing is finished, the polishing box can be detached, and the polishing liquid is recycled.

The present application relates to the technical field of optical element grinding processing, and especially relates to a design method for preventing interference of cup wheel grinding inner spherical surface of hemispherical resonator and cup wheel, and the present application provides the design method for preventing interference of cup wheel grinding inner spherical surface of hemispherical resonator, which comprises the following steps: establishing a geometric coordinate system, determining the angle between the cup wheel axis and the hemispherical resonator axis, and introducing a profile offset angle on the cup wheel circular arc profile; calculating the safety distance between the outer wall surface of the cup wheel and the end surface of the inner spherical surface of the hemispherical resonator, the safety distance between the center support rod and the inner wall surface of the cup wheel, and the safety distance between the center support rod and the bottom of the cup wheel; correcting the safety distance according to the cup wheel wall thickness; establishing an interference prevention constraint condition to ensure that the corrected safety distance is greater than zero; and determining the value range of the profile offset angle and the cup wheel geometric parameters according to the constraint condition, so that the present application ensures that no interference occurs in the grinding process by introducing key geometric parameters and a calculation model.

The invention relates to the technical field of design and manufacturing of micro-hemispherical resonator gyroscopes, in particular to a position calibration method of a blast burner for high-temperature blowing forming of a micro-hemispherical resonator, which comprises the following steps of: establishing a linear mapping model between an alignment error and a height difference; three times of high-temperature blowing experiments are completed, and the plane coordinates of the blowtorch and the corresponding harmonic oscillator height difference measurement value in each experiment are recorded respectively; a residual target function is constructed on the basis of experimental data, and optimal coordinates of the blowtorch enabling the theoretical height difference to be minimum are optimized, solved and calculated in a back-stepping mode through a genetic algorithm; and taking the obtained optimal coordinate as a new blowtorch pose to carry out a next blowing experiment, and after new height difference data is obtained, combining historical data to repeatedly execute genetic algorithm solution and iteratively update the blowtorch position until the height difference meets the process tolerance requirement. The method aims at evaluating and compensating the alignment error of the blowtorch and the mold in real time in the high-temperature blowing process so as to restrain the first-order harmonic error in the height direction of the harmonic oscillator and improve the geometric consistency of forming.

The invention discloses a harmonic oscillator measuring and trimming integrated machine tool and an application method thereof.According to the machine tool, a height adjusting table and a vacuum tank are arranged on a vibration isolation table, and a laser interferometer is installed on the height adjusting table; the vacuum tank is internally provided with a harmonic oscillator clamping and moving mechanism with a single-axis design, an ion source for carrying out ion beam processing on a harmonic oscillator mounted on the harmonic oscillator clamping and moving mechanism, and an excitation mechanism for providing excitation for the harmonic oscillator mounted on the harmonic oscillator clamping and moving mechanism; the laser interferometer and the ion source share the same light path, so that measurement and processing of the harmonic oscillator are seamlessly connected without switching the light path, and a variable diaphragm is arranged at an ion beam emission window of the ion source. The invention aims to solve the problems of low harmonic oscillator processing efficiency caused by a traditional harmonic oscillator measuring, trimming and separating machine tool, precision attenuation caused by dynamic adjustment of an ion source or a workpiece, and precision limitation.

The application relates to the technical field of hemispherical resonators, in particular to a high-vibration-resistance gyro mechanical support structure based on a hemispherical resonator, which aims to solve the problem that a resonator is easily disturbed by external vibration and thus the measuring precision is affected. The structure comprises a shell, a resonator and a base, the resonator comprises a supporting rod and a spherical shell connected with the supporting rod, further comprises a clamping ring and a plurality of clamps, the clamps are connected on the clamping ring; when the shell or the base is subjected to external vibration, the clamping ring and the clamps jointly absorb the vibration on the shell and the base. The clamping ring is fixed on the base and the shell, the clamps are close to the spherical shell and are slidably connected on the clamping ring, two-stage passive vibration isolation effects of flexible absorption and then rigid amplitude limiting are realized, in a low frequency band, the vibration is preferentially absorbed by the clamping ring, and the transmission into the resonator is reduced; in a medium-high frequency or impact transient state, the clamps provide limiting and rigid support to prevent overshoot or collision, so that the vibration energy is significantly reduced from being directly coupled into the hemispherical shell, and the main mode stability and the resonator quality factor are protected.

The invention discloses a self-adaptive multi-dimensional phase-locked control method and system for a hemispherical resonator gyroscope. The method comprises the following steps: S1, acquiring a dominant wave vibration displacement signal and an orthogonal wave vibration displacement signal; s2, multiplying the dominant wave vibration displacement signal and the orthogonal wave vibration displacement signal by a preset control signal, and filtering to obtain a plurality of demodulation quantities; s3, calculating a phase locking error according to the plurality of demodulation quantities; s4, calculating a frequency estimation value and a phase estimation value of the hemispherical harmonic oscillator; s5, updating the frequency and the phase of a preset control signal by using the frequency estimation value and the phase estimation value of the hemispherical harmonic oscillator to obtain a control signal; s6, transmitting the control signal to an amplitude control loop and an orthogonal control loop, and inputting an output signal into a driving circuit; and S7, circulating S3 to S6, and controlling principal wave vibration and orthogonal wave vibration of the hemispherical harmonic oscillator in real time so as to realize phase-locked convergence. According to the invention, precise control of phase locking and frequency is realized, and the control precision of each control loop of the hemispherical resonator gyroscope is improved.

A passively protected quantum memory operates in two dimensions using a square lattice of harmonic oscillators. Each harmonic oscillator is subjected to a coherent two-photon drive process and an incoherent two-photon loss process. The oscillators are coupled to their nearest neighbors via a ferromagnetic Ising parity-parity interaction. A cold bath coupled to the oscillators facilitates an energy dissipation process that aligns the parities of neighboring oscillators. This configuration passively suppresses phase-flip and bit-flip errors without active error correction cycles.

The utility model discloses a hemisphere harmonic oscillator chemical polishing device which comprises a polishing pool, a stirring mechanism and a clamping mechanism, the polishing pool is arranged above the clamping mechanism, one end of the clamping mechanism is in transmission connection with multi-shaft equipment, the other end of the clamping mechanism clamps a clamping part of a hemisphere harmonic oscillator to be polished, and the part, to be polished, of the hemisphere harmonic oscillator extends into the polishing pool. The hemispherical harmonic oscillator is connected with the polishing pool in a sealed mode, the multi-shaft equipment drives the clamping mechanism to rotate when started, so that the hemispherical harmonic oscillator and the polishing pool are driven to rotate, and the stirring mechanism is fixed to the polishing pool and used for providing stirring force opposite to rotation of the polishing pool for polishing liquid in the polishing pool. According to the polishing device, integral polishing of the hemispherical harmonic oscillator can be achieved, the polishing effect is good, the polishing efficiency is greatly improved, and the polishing cost is greatly reduced.

The present invention provides a resonator and a resonant device that improves DLD while suppressing the decrease in the resonant frequency adjustment rate. The resonator (10) includes: a vibrating part (110) comprising a plurality of vibrating arms (121A to 121D) and a base (130), wherein at least two vibrating arms are bent out of plane at different phases; a holding part (140) configured to hold the vibrating part (110); and a support arm (151) having one end connected to the holding part (140) and the other end connected to the rear end (131B) of the base (130). When viewed from above, the other end of the support arm (151) is connected to a position in the range of -0.1WB to 0.1WB relative to the base width WB of the base (130) when the position through which the center line (CL1) of the rear end (131B) of the base (130) passes is taken as a reference. The support arm length LS of the support arm (151) is more than 0.2 times and less than 0.4 times the vibrating arm length LA of the vibrating arms (121A to 121D).

This invention provides an in-situ measurement and analysis method for the wear characteristics of a small-diameter ball-end grinding wheel for hemispherical harmonic oscillators, based on a spectral confocal sensor. It relates to the field of ultra-precision grinding and polishing technology, addressing the problem that existing in-situ detection methods cannot eliminate system installation errors, and that sensor-acquired signal data cannot accurately characterize the true wear condition of the grinding wheel. This invention uses a spectral confocal sensor to collect relative distance data of a standard sphere, utilizing the constraint conditions of the measurement coordinate points satisfying the ideal standard spherical surface equation. Simultaneously, based on multibody theory, it establishes the kinematic chain transmission relationship of the machine tool measurement system, constructs an error transmission model of the machine tool, and solves for assembly error values. The assembly error results are then used to compensate for the grinding wheel coordinate measurement results to obtain the calibrated grinding wheel coordinates, which are further fitted to the morphology of the small-diameter ball-end grinding wheel, thus achieving in-situ measurement and analysis of the grinding wheel wear characteristics.

The invention relates to the technical field of hemispherical harmonic oscillators, in particular to a high-vibration-resistance gyroscope mechanical supporting structure based on a hemispherical harmonic oscillator, and aims to solve the problem that the harmonic oscillator is easily interfered by external vibration to influence the measurement precision. Comprising a shell, a harmonic oscillator and a base, the harmonic oscillator comprises a supporting rod and a spherical shell connected with the supporting rod, the harmonic oscillator further comprises a clamping ring and a plurality of hoops, and the hoops are connected to the clamping ring; when the shell or the base is subjected to external vibration, the clamping ring and the hoop absorb vibration on the shell and the base together. The clamping ring is fixed on the base and the shell, the hoop is close to the spherical shell and is connected to the clamping ring in a sliding mode, the two-stage passive vibration isolation effect of first flexible absorption and then rigid amplitude limiting is achieved, vibration is preferentially absorbed by the clamping ring in a low-frequency band, and vibration transmitted into a harmonic oscillator is reduced; in a medium-high frequency or impact transient state, the hoop provides limiting and rigid supporting to prevent overshoot or collision, so that vibration energy directly coupled into the hemispherical shell is remarkably reduced, and the stability of a main mode and the quality factor of the harmonic oscillator are protected.

The invention discloses a method for identifying first third-order harmonic waves of unbalanced mass of a hemispherical resonator based on vibration excitation, and belongs to the field of parameter identification of hemispherical resonators. The method solves the problems of low leveling efficiency and precision caused by difficult data identification and long measurement time of an existing method for identifying the first third-order harmonic waves of the unbalanced mass. Under vibration excitation, the vibration amplitude and the standing wave azimuth angle of the hemispherical harmonic oscillator are associated with the first-order harmonic and the third-order harmonic of the unbalanced mass; under vibration excitation, the vibration amplitude and the standing wave azimuth angle of the hemispherical harmonic oscillator are associated with the second-order harmonic of the unbalanced mass. And the first three-order harmonic amplitudes and azimuth angles are solved by constructing a corresponding coupling relationship. The method is mainly used for identifying the first third-order harmonic waves of the unbalanced mass of the hemispherical harmonic oscillator.

The invention belongs to the technical field of inertial navigation, and discloses a gyroscope and a gyroscope error correction material filling method, in the gyroscope, a center supporting structure is cylindrical, a plurality of material filling grooves are formed in the peripheral wall of the center supporting structure at intervals in the circumferential direction of the center supporting structure, and the plurality of material filling grooves are used for filling error correction materials; the electrode base is mounted at the upper end of the central supporting structure; the hemispherical harmonic oscillator is used for being installed on the electrode base, so that the hemispherical harmonic oscillator and the electrode base are installed on the base through the cylindrical center supporting structure, assembling is convenient and fast, in addition, the multiple material filling grooves formed in the peripheral wall of the center supporting structure can be filled with thermal expansion coefficient compensation materials according to actual needs, and the thermal expansion coefficient compensation materials can be filled in the material filling grooves. The material filling grooves can be filled with a plurality of material filling grooves to compensate deformation of the gyroscope caused by change of working temperature so as to reduce thermal stress, and meanwhile, damping materials can be filled in the material filling grooves so as to eliminate damping drift and improve measurement precision and long-term operation stability.

The invention discloses a multi-station time-sharing testing device and a multi-station time-sharing testing method for harmonic oscillator performance parameters in the technical field of vibrating gyroscopes. The multi-station time-sharing testing device for harmonic oscillator performance parameters comprises a vacuum environment module, a rotating station module, a synchronous excitation module, a multi-optical-path laser vibration measurement module and a signal acquisition and processing module, the vacuum environment module provides a vacuum environment required by testing, and the rotating station module realizes position adjustment of a harmonic oscillator. The synchronous excitation module completes synchronous vibration excitation of a plurality of harmonic oscillators, the multi-optical-path laser vibration measurement module realizes time-sharing vibration measurement of a single vibration meter on multiple stations through an optical branching and chopping technology, the signal acquisition and processing module calculates performance parameters through multi-section short-term attenuation data fitting, and the modules work cooperatively to realize multi-station time-sharing vibration measurement. According to the invention, rapid, high-precision and low-cost testing of multiple harmonic oscillators by a single vibration meter is realized, and the testing efficiency is greatly improved.

The application discloses an on-line identification method for damping characteristics of a hemispherical resonator, which is realized by active standing wave precession and belongs to the technical field of inertia.The application solves the problem that the damping characteristics of a hemispherical resonator in the working process of a hemispherical resonator gyro cannot be identified in real time at present.The application drives the standing wave active precession of the resonator by using the additional driving force of the control electrode of the hemispherical resonator gyro, and the damping characteristics of the resonator can be detected in real time in the working process of the hemispherical resonator gyro system by solving each part of the control quantity.The error of the damping characteristics of the hemispherical resonator gyro system caused by the change of the external environment and the service life of the components is overcome, and the problem that the damping characteristics of the gyro are difficult to accurately determine in a long time working process is solved.Compared with the traditional off-line determination identification method by using a turntable when leaving the factory, the method of the application can stably determine the damping characteristics for a long time.The method of the application can be applied to on-line identification of the damping characteristics of the hemispherical resonator.

The invention discloses an oscillation starting method, device and system based on a time division multiplexing gyroscope, which are applied to the field of resonant gyroscopes, and the oscillation starting method comprises the following steps: in a first stage, applying a maximum single pulse to the gyroscope for excitation; in the second stage, the step of detecting the vibration state of the harmonic oscillator in the gyroscope and the step of exciting the gyroscope in a full-scale output mode are executed circularly and alternately, and phase-locked control is performed on the gyroscope so as to determine the resonant frequency of the gyroscope; in the second stage, the time for executing the detection step is longer than the time for executing the excitation step; in the third stage, the step of exciting the gyroscope in the full-scale output mode and the step of detecting the vibration state of the harmonic oscillator in the gyroscope are executed circularly and alternately until the vibration of the harmonic oscillator reaches preset energy; and in the third stage, the time for executing the excitation step is longer than the time for executing the detection step. The starting efficiency is improved by increasing the detection time or the excitation time in a specific time period.

The application discloses a kind of based on geometric error comprehensive measurement and unified parameterization hemispherical resonator vibration performance evaluation method, it is related to optical element processing field, to solve the lack of comprehensive evaluation method of hemispherical resonator vibration performance based on multiple source geometric error in prior art.The technical points include: measuring hemispherical resonator multi-source data, convert measurement data to unified coordinate system and unified circumferential reference;Further error separation is carried out to measurement data, obtain the circumferential distribution geometric error and position size geometric error of hemispherical resonator;Circumferential harmonic decomposition is carried out to circumferential distribution geometric error, obtain each error circumferential harmonic amplitude, circumferential harmonic phase and global circumferential harmonic complex amplitude, and position size geometric error is combined, and the geometric error parameter set of hemispherical resonator is constructed;Geometric structure is constructed to hemispherical resonator by geometric error parameter set, and the vibration performance of hemispherical resonator is carried out finite element analysis.