917 results about "Phase locking" patented technology

The invention discloses a switch loop data extraction method, device and equipment based on phase locking, and the method comprises the steps: carrying out the interval change analysis of operation data in a ring main unit, and recognizing a communication abnormal node through a phase locking technology; associating a mechanical vibration source based on the communication abnormal nodes, detecting a vibration conduction path, extracting current fluctuation characteristics, and determining position deviation; the operation current intensity is adjusted in combination with fluctuation characteristic parameters, and accurate off-position control is achieved through reverse braking force; constructing a dynamic threshold reference based on frequency domain analysis, and generating a complete operation record according to the dynamic threshold reference and the accurate parking data; performing typed grouping and transmission optimization on the data, and controlling data switching by adopting a gradually migrated beat sequence; and finally, through signal reconstruction and data fusion technologies, a switch loop data set with continuous time sequence and complete space is generated. The method can effectively cope with communication interference, mechanical vibration and other complex environmental factors, and improves the integrity and accuracy of data acquisition.

The invention provides a clock signal generating circuit, a wired communication transceiver and electronic equipment, and the circuit outputs a first DC voltage comprising phase difference information and frequency difference information of a reference clock signal and a feedback clock signal through a phase frequency detection module. The pulse generator generates a narrow pulse signal based on the DC voltage and a reference clock signal, the oscillation frequency of each secondary ring oscillator in the cross-coupled ring oscillator is controlled by the first DC voltage, and the cross-coupled loop performs synchronous coupling and phase sequence adjustment processing on each secondary ring oscillator. One output node in the cross coupling ring oscillator receives the narrow pulse signal, frequency and phase locking is completed in an injection locking mode, and the frequency divider is used for conducting frequency division processing on any high-frequency clock signal and outputting a feedback clock signal. Therefore, a high-frequency multi-phase clock signal with low phase noise and high phase precision can be generated by using the low-frequency reference clock signal.

The invention belongs to the field of electroencephalogram signal processing, and provides a time-frequency space electroencephalogram emotion recognition method based on three-dimensional space position embedding, which comprises the following steps of: firstly, constructing a three-dimensional electrode space position matrix based on an international 10-20 system standard, determining a space adjacency relation between electrodes, and calculating a phase locking value to obtain a functional connection matrix; then, deep feature fusion of an electrode spatial position matrix and a functional connection matrix is realized by adopting a hierarchical cross Transform architecture, the spatial position matrix represents spatial distribution features of a cerebral cortex region, and the functional connection matrix quantifies phase synchronization features of cross-brain region neural oscillation and simulates a brain spatial topological structure; and finally, extracting time, frequency and spatial features of the electroencephalogram signals through combination of a graph attention network and bidirectional long-short-term memory with an attention mechanism for emotion recognition. The method can effectively extract space structure information highly related to the emotional state, and significantly improves the accuracy of emotion recognition.

The invention discloses a digital control uninterruptible power supply parallel operation phase locking method, which relates to the technical field of digital phase locking, and comprises the following steps of: in each analysis period, acquiring an output voltage waveform signal and a current frequency disturbance control parameter of each uninterruptible power supply, and respectively executing short-time Fourier transform to obtain an output voltage waveform signal and a current frequency disturbance control parameter of each uninterruptible power supply; and converting the time domain signal into a multi-dimensional dynamic spectrum matrix, extracting frequency and amplitude parameters of a disturbance signal, and constructing a corresponding uninterruptible power supply disturbance parameter set. According to the invention, through dynamic spectrum analysis and frequency domain coupling tensor modeling, accurate extraction of UPS modulation signal features and dynamic evaluation of resonance risk indexes are realized, in combination with a risk-driven frequency intervention mechanism, frequency coupling is broken, the frequency diversity and disturbance decoupling capability of the system are improved, and the reliability of the system is improved. The stability, the anti-interference performance and the intelligent response capability of the parallel system are obviously enhanced, and early warning and active suppression of lock point resonance are realized.

The invention discloses a dangerous behavior recognition method and device based on multi-source physiological signal fusion, and aims to generate a physiological synchronization value reflecting a heart-brain coupling state by monitoring electroencephalogram and electrocardiosignals and calculating a phase locking value. Strong coupling signal pairs are screened based on physiological synchronization values, abnormal delay propagation paths and cascade mutation points are extracted, and dangerous trigger nodes and high-risk accumulation areas are identified through energy density analysis; the abnormal gradient field is subjected to rotation modulation innovatively through electroencephalogram signals, and a dynamic gradient field is generated to determine a dangerous behavior boundary; establishing an electrocardio resonance matching mechanism to generate a self-adaptive monitoring sequence and a grading early warning strategy; dynamically optimizing resource configuration and constructing a danger convergence field by adopting an adaptive acquisition scheme triggered by rhythm variability; and finally, early warning information is converted into a specific dangerous behavior category based on an accurate identification window, and an omnibearing intelligent monitoring solution is provided for high-risk operation safety management.

The invention discloses a hemispherical gyroscope phase-locking control optimization method and device, and the method comprises the steps: changing the vibration mode azimuth angles of a hemispherical resonator gyroscope, collecting the phase-locking frequency in real time for each vibration mode azimuth angle, and calculating the phase-locking optimization control force in real time according to the collection result, substituting the phase locking frequency and the phase locking optimization control force into an electrode driving excitation model to calculate a driving signal in real time and transmit the driving signal to a driving electrode, and after the phase locking frequency is stable, collecting a stable phase locking optimization control force corresponding to the vibration mode azimuth angle; according to all the vibration mode azimuth angles and the corresponding stable phase-locking optimization control force, constructing a relation model of the two, solving the relation model to obtain phase-locking optimization parameters, calculating the phase-locking optimization control force according to the phase-locking optimization parameters and the relation model, and substituting the phase-locking optimization control force into an electrode driving excitation model to calculate a driving signal. Therefore, the compensation for the driving signal when the hemispherical resonator gyroscope works normally is realized. According to the invention, the influence of the circumferential frequency difference on the output precision of the harmonic oscillator can be eliminated.

The invention relates to an off-grid parallel operation starting method of an energy storage system, the energy storage system and a storage medium, and belongs to the technical field of energy storage. The host receives the phase locking synchronization completion signal and sends a voltage unification instruction to the slave after determining that the grid-connected slave completes phase locking synchronization, and the host and the slave are boosted from the black start voltage to the rated voltage based on the voltage unification instruction to complete parallel start, so that fluctuation caused by unstable voltage in the start process of the slave can be improved; the stability of the energy storage system in the off-grid parallel operation process is improved; the slave is started after being synchronized according to the black start voltage phase lock phase established by the host, so that the output voltage after the slave is started is consistent with the output voltage of the host, the voltage consistency of the parallel energy storage current device is high, ring current caused by voltage difference can be reduced, and the operation efficiency of the system is improved; and the slave is started after successful phase locking, so that the risk of starting failure can be reduced.

The invention discloses a new energy broadband test analysis management and control method and system, and relates to the technical field of new energy detection and intelligent management and control, and the method comprises the following steps: obtaining a multi-window splicing frequency spectrum of a load switching edge, superposing phase lock consistency verification in a splicing frequency spectrum result, generating a frequency spectrum leakage suspicion chart, and carrying out the boundary constraint for energy track extraction; under the constraint of a spectrum leakage suspicion chart, an energy center track, a group delay curve and a phase derivative sequence are extracted, and a cross-frequency migration fingerprint is constructed and is used as a basic evidence for misjudgment traceability. By means of spectrum suspicion identification, feature fusion modeling, misjudgment traceability, label correction, energy reverse intervention and the like, accurate identification and closed-loop regulation and control of false operation caused by spectrum leakage are achieved, high identification accuracy, low misjudgment rate, high anti-interference performance and quick response capacity are achieved, and the operation stability and safety of a new energy field station are remarkably improved.

The invention relates to the technical field of radio frequency generator circuits, and provides a phase-locking frequency-stabilizing multi-core control radio frequency system, which processes I / Q signals and constructs a multi-core task allocation and cooperation mechanism through a digital baseband processing module, and performs pre-distortion processing and system scheduling. The double-closed-loop control module is used for stabilizing fundamental frequency, correcting temperature drift and compensating and adjusting frequency swing amplitude; the hybrid power amplification module is used for performing multi-stage hybrid power amplification signal processing and temperature monitoring through a driving stage and output stage combined topology; and the feedback sampling network module collects output signals in real time through a directional coupler and feeds back, adjusts and precisely controls the frequency stability according to the output signals.

The invention discloses a continuous variable quantum key distribution method, device and system, and belongs to the field of wireless communication. Firstly, a sending end generates continuous light pulses for discrete coding, a one-dimensional discrete modulation signal is generated, quantum signal light is generated through an attenuator, and the quantum signal light is coupled to a quantum channel for transmission. Then, a receiving end adopts a homodyne detector to measure the regular component of the quantum signal in a self-calibration manner; and after a local measurement base direction and a phase drift angle introduced by a dynamic compensation quantum channel are adjusted in real time, a covariance matrix is calculated and input into a post-processing module, the code rate of the system is further calculated, and a security key is generated by using a protocol between a receiving end and a transmitting end. According to the device, the intensity modulator is connected between the laser and the attenuator, so that one-dimensional discrete modulation is realized, and dependence on a phase reference signal is avoided. According to the system, a traditional phase locking module is removed, an asymmetric phase space coding mechanism is adopted, dependence on a phase reference signal is eliminated, and the safety and stability of the system are improved.

The invention discloses an intermittently operated phase-locked loop and an implementation method thereof. The phase-locked loop can be controlled to be switched between an open loop and a closed loop. The phase-locked loop is controlled to be switched between an open loop and a closed loop by judging whether the performance of a phase-locked loop circuit meets a preset standard of a system applying the phase-locked loop or not in real time; or, the phase-locked loop circuit is controlled to be switched between the open loop and the closed loop according to a preset period according to a time period preset period required by the system for the preset standard of the phase-locked loop circuit. Therefore, the open loop or the closed loop of the phase-locked loop can be controlled according to actual needs, and the influence of the phase-locked loop on the system can be reduced while the phase-locked performance of the phase-locked loop can be completed.

The invention discloses an iterative phase-locked limit cycle flux observer, a control method, a control device and a control system, and the control method comprises the following steps: collecting alpha-beta axis voltage and current signals of a motor, constructing an IPMSM mathematical model under an alpha-beta axis, and calculating to obtain a counter electromotive force vector of the motor; taking the motor back electromotive force vector as input, acquiring motor rotor flux linkage information through an iterative phase-locked limit loop flux linkage observer, and estimating a motor rotating speed and a position signal according to the motor rotor flux linkage information; and the rotating speed and the position signal of the motor are input into a motor closed-loop control system, so that position-sensorless closed-loop control of the permanent magnet synchronous motor is realized. According to the method provided by the invention, the problem of integral drift or phase lag of a traditional flux linkage observer can be avoided, the influence of direct current bias on flux linkage and position observation precision is effectively suppressed, the dynamic response capability of position sensorless control is remarkably improved, and a position estimation error generated in a dynamic process is suppressed.

The present invention relates to the technical field of weak signal detection equipment, and specifically to a multi-channel digital phase-locked amplifier. It includes a signal conditioning channel, a reference channel, a serial-to-parallel converter, a phase-sensitive detector and a communication output module; the number of the signal conditioning channels is at least three and the structures are exactly the same; the output ends of the signal conditioning channels are all connected to the serial-to-parallel converter; the signal conditioning channels include a DC isolation filter, an amplifier, a low-pass filter, and an A / D converter. By integrating multiple signal conditioning channels, space is saved, and all A / D converters are sampled at the same time to ensure synchronization, achieving synchronization and consistency that could not be achieved by multiple independent phase-locked amplifiers in the past; the phase-sensitive detector, phase shift module, phase-locked loop, and sine-cosine generator are all transferred to the internal processing of the digital chip, eliminating the influence of noise, temperature drift, DC bias, etc. of the analog signal, improving the stability of the output result, and saving the volume of the instrument.

The invention provides a phase-locked amplification system for enhancing the signal-to-noise ratio of ultrafast laser pumping-detection transient imaging. The system comprises a signal input module which is arranged on a pumping light path and a detection light path, wherein the signal input module comprises a light splitting plain film and an imaging objective lens which are arranged in sequence, wherein the centers of the light splitting plain film and the imaging objective lens are located on a first axis; the centers of the first reflector, the filter, the focusing lens and the camera are located on a second axis in sequence, and the camera is used for shooting light reflected by the sample to obtain a first signal; the reference acquisition module comprises a beam splitting piece and a second reflecting mirror, the beam splitting piece is arranged on the pumping light path, and a reference light path is shot through a camera to obtain a second signal; and the phase-sensitive detection module is used for calculating the first signal and the second signal to obtain a carrier distribution condition at a preset moment. According to the invention, low pumping measurement is realized, the service life of a sample is prolonged, and the problem of detecting weak pumping imaging signals submerged in system background noise is solved.

The invention discloses an electricity stealing behavior detection method and system based on an intelligent electric energy meter, and the method comprises the following steps: constructing a phase locking reference frame at the end of the intelligent electric energy meter, synchronously collecting a voltage phase and a current phase through high-precision time, generating a direction discrimination baseline, setting a zero-power crossing point and a direction overturning threshold value, and carrying out the detection of an electricity stealing behavior. Outputting a direction baseline consistency index as a direction identification reference; according to the invention, through phase locking, high-precision synchronization, neutral line drift analysis, multi-table data alignment and phase disturbance verification, accurate identification and causal confirmation of a current backward flow behavior are realized, a disturbance user is reversely positioned in combination with a disturbance fingerprint, an intervention instruction is output, and an identification-verification-positioning-control closed loop mechanism is constructed. And the anti-electricity-stealing capability and the metering accuracy of the intelligent electric energy meter in a complex power supply environment are obviously improved.

The invention discloses an external cavity tunable laser linewidth compression system for realizing wavelength phase locking based on mutual injection of gain chips. The external cavity tunable laser linewidth compression system comprises a red light semiconductor laser main gain chip, a first collimation optical system, a blazed grating, a tuning rotating mirror, a reflector, a power supply driving system and a double-path feedback amplification system, the double-path feedback amplification system comprises a first secondary gain chip, a second secondary gain chip, a second collimation optical system, a third collimation optical system and a polarization-free beam splitter prism; and the red light semiconductor laser main gain chip, the first secondary gain chip and the second secondary gain chip are all connected with the power supply driving system. Therefore, the technical problems of low output infrared light power, poor stability and narrow mode-hopping-free tuning range in the prior art are solved, and high-power, narrow-linewidth, high-stability and large-range mode-hopping-free continuous tuning red light output can be realized.

The invention provides a polarization modulation coupling time control phase locking high-temperature noise suppression in-situ Raman method and device, and relates to the technical field of spectrum detection. The method comprises the following steps: exciting pulse linear polarization laser to irradiate a sample to obtain Raman scattering light; a parallel vibration component (P) and a vertical vibration component (S) are obtained, and original spectral data containing polarization information and residual high-temperature noise are collected by adopting an ISCCD detector synchronously triggered by gating. Background noise is removed and a parallel vibration component (P) is extracted through polarization differential processing in combination with adaptive filtering (dynamically adjusting parameters according to signal distribution) and principal component analysis (PCA); and finally, performing signal-to-noise ratio optimization on the pure component by applying a phase locking algorithm to finally obtain a Raman spectrum result with a high signal-to-noise ratio. According to the invention, the in-situ Raman spectrum of the material within the temperature range of room temperature to 3000 DEG C can be measured, and the detection of weak signals is more sensitive.

The embodiment of the invention provides an interlaced PFC circuit and a phase locking method of the interlaced PFC circuit, the interlaced PFC circuit comprises n PFC circuits, n driving circuits and a processor, and the n PFC circuits comprise a main phase PFC circuit and a slave phase PFC circuit. The phase locking method comprises the steps that a processor obtains a master phase driving signal input to a master phase PFC circuit and obtains a slave phase driving signal input to a slave phase PFC circuit; capturing a first rising edge of the slave phase driving signal after the first rising edge of the master phase driving signal occurs to obtain first time; capturing a second rising edge of the master phase driving signal after the first rising edge of the slave phase driving signal occurs to obtain a second time; and controlling the conduction duration of the slave phase driving signal according to the difference value between the first time and the second time. Therefore, quick closed-loop phase locking of the multi-phase interleaving parallel circuit is realized, full-range quick phase locking is realized under the conditions of non-valley bottom opening and valley bottom opening, meanwhile, the circuit design is simplified, and accurate phase locking can be realized without redundant hardware circuits.

The invention discloses a multifunctional hydraulic system experiment table, which relates to the technical field of hydraulic system experiment tables and comprises a time base line synchronous control module, a phase lock correction stability control module, a false peak identification and correction module, a multi-dimensional fault-tolerant judgment control module and a reverse energy slow-release anti-reverse module. And the time base line synchronous control module is used for establishing a cross-sensor unified time base line control structure, generating a synchronous reference surface by using a high-stability crystal oscillator signal, and executing nanosecond phase calibration on sampling signals of the pressure sensor and the flow sensor by taking the synchronous reference surface as a unified time reference. According to the invention, high-precision synchronous acquisition of pressure and flow signals is realized through unified time base line and phase locking correction, and high-pressure transient test data is ensured to be real and stable; and meanwhile, control logic is reconstructed, and an energy slow release strategy is introduced, so that the pressure relief process is stable and controllable, pump reverse rotation and structural impact are avoided, and the safety, reliability and self-healing stability of the experiment table are remarkably improved.

The invention relates to the technical field of wind turbine generator maintenance, and discloses a wind turbine generator blade unmanned aerial vehicle deicing assembly and method.The wind turbine generator blade unmanned aerial vehicle deicing assembly comprises an unmanned aerial vehicle, and a laser radar and an installation shell integrating an ultrasonic transducer, a pulse nozzle and a hydraulic pump are installed at the bottom of the unmanned aerial vehicle. The deicing control system obtains focus space coordinates and interface resonance frequency of the blade surface by using a space state sensing module; the stress field focusing module calculates the phase delay amount of the ultrasonic transducer, compensates the pose deviation of the unmanned aerial vehicle by adjusting the emission time sequence, and drives the ultrasonic transducer to generate resonance stress on an ice layer-skin interface; and the sound stream synchronous control module determines a jet flow triggering moment according to synchronous phase locking solution, drives a pulse nozzle at an instantaneous negative pressure phase point of a sound wave period to inject a small amount of deicing fluid into an interface crack, and generates shear stress to induce the interface crack to expand and peel off an ice layer. Accurate throwing of deicing energy is achieved, and the icebreaking efficiency is improved on the premise that the safety of the blade structure is guaranteed.

The invention discloses a fast-locking low-jitter sub-sampling phase-locked loop structure. The sub-sampling phase-locked loop comprises a sub-sampling Bang-Bang phase discrimination circuit, a self-adaptive variable step size digital filter circuit, a delta sigma digital-to-analog conversion circuit and an oscillator circuit. The sub-sampling Bang-Bang phase discrimination circuit generates a phase discrimination output digital control signal according to an input reference signal and a feedback oscillator signal phase error, the adaptive variable step size digital filter circuit adaptively adjusts a filtering gain according to the phase discrimination output digital control signal, and the output of the filter circuit realizes digital-analog conversion after oversampling modulation. And the output analog signal controls the voltage-controlled oscillator to realize rapid low-jitter phase locking of the output and the reference signal.

The invention relates to a double-loop phase-locked low-phase-noise reference local oscillator circuit structure which comprises a first phase-locked loop, a first signal processing unit, a power distribution circuit, a second phase-locked loop, a second signal processing unit and a frequency multiplication unit. The output end of the first phase-locked loop is connected with the input end of the first signal processing unit, the output end of the first signal processing unit is connected with the input end of the power distribution circuit, the output end of the power distribution circuit is connected with the input end of the second phase-locked loop, and the output end of the second signal processing unit outputs local oscillator signals through the frequency multiplication unit in sequence. By adopting the double-loop phase-locked low-phase-noise reference local oscillator circuit structure, various reference local oscillator signals can be output at the same time to be provided for the whole system to use through the circuit structure of the multi-path phase-locked loop. By changing the second phase-locked loop, better phase noise than broadband VCO and DDS can be obtained.

A circuit includes a phase selector to generate an injection clock signal having an injection phase based on a phase of a digitally controlled oscillator clock signal generated within a phase-locking feedback loop. An injection-locked oscillator (ILO), coupled to an output of the phase selector, generates an ILO clock signal that is convertible to provide a feedback clock signal of the circuit. Logic, coupled between an output of the ILO and the phase selector, to, at each predetermined number of cycles of the DCO clock signal, cause the phase selector to output a phase shift in the injection clock signal that causes the ILO clock signal to comprise a rotated phase, relative to the injection phase, and that prevents a glitch in the injection clock signal.

The invention discloses a food safety monitoring system and a monitoring method thereof, and relates to the technical field of food safety monitoring, and the method comprises the following steps: building a sealing integrity real-time acoustic monitoring link, obtaining an acoustic signal generated by trace leakage through a phase locking algorithm, and building a pressure differential matrix based on the acoustic signal; and inputting the pressure differential matrix into a constructed gas chromatography digital twinborn model, deducing a dynamic evolution process of a carrier gas flow field, and extracting an instantaneous flow velocity critical threshold under the current working condition. According to the invention, real-time prediction and regulation of gas chromatography flow velocity disturbance are realized through acoustic monitoring and digital twinborn modeling, magnetic fluid adjustment and temperature compensation are combined, retention time drift is inhibited, and detection stability and robustness are improved. Meanwhile, a self-adaptive peak position tracking and dynamic window adjusting mechanism is introduced, a chromatographic peak position is accurately recognized, errors are fed back to a front-end sensing link, a closed-loop optimization process is constructed, and the accuracy and reliability of food additive detection are guaranteed.

A voltage synchronizing signal detection method based on an improved DSOGI-PLL is characterized in that a DSOGI-QSG algorithm is adopted in a phase-locked loop, a difference node is introduced on a second-order generalized integrator SOGI structure in the DSOGI-QSG to improve the DSOGI structure, and the improved DSOGI-QSG structure is obtained and can suppress the influence of a direct current component on extraction of each parameter; a specific subharmonic elimination module structure is additionally arranged at the front end of the SOGI structure to serve as a front harmonic filtering cascade module, then the amplitude is corrected through a correction coefficient, and finally filtered signals are input into the SRF-PLL. A cascade harmonic elimination module is constructed in front of the QSG to suppress the distortion harmonic influence, and meanwhile, the QSG structure is optimized, so that the QSG structure can eliminate the direct current amount in the signal, the good characteristics of the traditional DSOGI-PLL are reserved, and meanwhile, the influence of the current bias amount, harmonic distortion and three-phase imbalance of the power grid synchronization signal on the phase locking speed and accuracy can be effectively reduced; and the system performance and applicability are improved.

The invention discloses a rectification feedback control method and system. The method comprises the following steps: acquiring a power grid voltage and an inversion output current, and obtaining an active current through phase locking and coordinate transformation; whether feedback is started or not is determined by judging whether id is lower than a first threshold value or not, if yes, a driving signal is generated according to the phase of the power grid, a power switch device in the rectification feedback unit is conducted, and energy is fed back to the power grid; if id is higher than the second threshold value, the unit is turned off. According to the method, by detecting the energy flow direction in real time, self-adaptive on-demand switching of the rectification feedback unit is achieved, unnecessary switching actions of a power device are effectively reduced, switching loss and the aging speed of the device are reduced, and therefore system efficiency and reliability are improved, the service life of the device is prolonged, and energy waste is avoided.

The invention provides a reactive power control method and device for a new energy power generation system. The reactive power control method comprises the following steps: acquiring a three-phase voltage value of a station grid-connected point in real time, inputting the three-phase voltage value into a phase-locked loop to obtain a phase-locked angle, and determining a first reference phase angle based on the phase-locked angle; based on the first reference phase angle, performing coordinate transformation on the grid-side inductive current value of the converter to obtain a dq-axis positive and negative sequence inductive current value, and performing coordinate transformation on the grid-side three-phase voltage value of the converter to obtain a q-axis positive and negative sequence grid-side voltage value; determining a q-axis inductive current reference value based on a reactive instruction value issued by the new energy station controller and the reactive closed-loop feedback quantity of the converter; determining a q-axis network side voltage reference value based on the dq-axis positive and negative sequence inductance current value, the q-axis positive and negative sequence network side voltage value and the q-axis inductance current reference value; and generating a PWM signal for controlling a grid-side three-phase power module of the converter based on the q-axis grid-side voltage reference value and the first reference phase angle.

The invention relates to the technical field of power grid switching, and provides a grid-connected and off-grid seamless smooth switching method and device, electronic equipment and a storage medium thereof. The method comprises the following steps: acquiring a power grid phase angle and dq-axis voltage in real time through SRF-PLL phase locking, performing Clarke-Park conversion on VSG output current, and calculating active power and reactive power; based on the power deviation, the virtual inertia and the damping coefficient, dynamic optimization is carried out to obtain self-adaptive inertia and damping; performing secondary voltage compensation by combining the dq-axis voltage amplitude difference and the real-time reactive power to generate excitation voltage; frequency compensation is realized by using a phase difference and a dynamic phase tracking model; a switching instruction is generated through multi-threshold judgment, linear transition is conducted on reference current and reactive power through a transition function during switching, a non-jump current instruction is output, and grid-connected and off-grid seamless switching is achieved by closing PWM. According to the invention, grid-connected and off-grid seamless switching and high-precision voltage frequency control are realized through multi-threshold judgment, soft-closed PWM and the like.

The invention discloses a high-speed and high-precision phase locking method, which can accurately grasp the noise level, phase deviation and attenuation coefficient of a channel through quantum channel estimation, and provides important information for subsequent processing. Signal decomposition allows accurate representation of the signal on a quantum base, laying a foundation for noise suppression (S3) and signal reconstruction. And noise suppression utilizes a quantum mechanism, so that the efficiency and accuracy of signal processing are improved. Adaptive link establishment and time-sharing signal transmission aim at different transmission requirements, and the efficiency of communication link establishment and data transmission is optimized. And link monitoring ensures the stability and reliability of communication. On the whole, the method can improve the security, stability and efficiency of quantum communication, reduces the complexity of quantum signal processing, and provides powerful technical support for practicability and commercialization of quantum communication.

The invention relates to the technical field of vehicle fault diagnosis, and discloses a vehicle anomaly detection system and method based on multi-modal data analysis, and the system builds a time zero point alignment relation between control domain data and a high-frequency vibration signal through a hardware synchronous triggering unit by using a level pulse; performing angular domain resampling on the non-stationary vibration signal by adopting a coarse-fine coupling phase locking technology and combining rotating speed polynomial fitting and instantaneous frequency ridge line extraction; the system constructs a virtual reference model by using a deep neural network, and deduces a predicted ideal angular domain characteristic spectrum of a current working condition according to a dynamic state vector; and on the basis, calculating the residual error of the actual spectrum and the predicted spectrum, removing noise through order correlation mask filtering, and judging abnormity based on the mahalanobis distance of a residual error vector and a statistical threshold value. The method effectively solves the problems that the signal is not stable and weak fault features are difficult to extract under the variable speed working condition, and improves the detection accuracy.