285 results about "Phase compensation" patented technology

The invention provides a medical RFQ accelerator low-level signal phase stability control method and system. The method comprises the following steps: constructing a time-frequency energy spectrum feature vector based on wavelet packet transformation; extracting a second disturbance feature based on a lightweight convolutional neural network and an attention mechanism; constructing a phase dynamic trend prediction module based on a long short-term memory network, and obtaining a first prediction phase error; constructing a phase compensation module based on a residual control network to obtain a second phase compensation amount; and outputting a real-time driving control signal based on the extended Kalman filter. According to the method, the time-frequency energy spectrum feature vector based on wavelet packet transformation is constructed, accurate characterization of the multi-scale disturbance features of the low-level signals is achieved, a medical RFQ accelerator phase dynamic compensation system is established in combination with a deep learning network and an extended Kalman filtering algorithm, the control precision and the anti-interference capability of signal phase stability are remarkably improved, and the method is suitable for popularization and application. The method is suitable for a high-precision medical particle accelerator control system.

The invention relates to the technical field of communication, and discloses a network communication chip signal interference suppression processing method. The method comprises the following steps: acquiring a local oscillator phase jitter sequence in real time through an on-chip phase noise monitoring unit; estimating Doppler frequency shift and channel coherence time based on the sequence; dynamically adjusting the closed-loop bandwidth of the phase-locked loop; and generating a phase compensation signal, and performing time-varying channel minimum mean square error equalization in combination with a received baseband signal to eliminate inter-symbol interference. The system integrates a phase noise monitoring function module, a channel parameter estimation function module, a phase-locked loop bandwidth regulation function module, a phase compensation generation function module and an interference joint elimination function module. By means of dynamic bandwidth reconstruction and high-precision phase compensation, the bit error rate under high-speed movement is remarkably reduced, the 5G millimeter wave communication standard requirement is met, and the method has the advantages of being achieved on a whole chip, low in delay and high in robustness.

The invention relates to the technical field of power quality monitoring, in particular to a method and system for constructing a power quality disturbance recognition model based on multidimensional data, and the method comprises the steps: obtaining voltage and current waveform data and environmental parameter data of a key node of a power transmission line, carrying out the hardware defect self-inspection and phase compensation of the voltage and current waveform data, and obtaining a power quality disturbance recognition model; clean transmission electric energy data is obtained; and performing multi-scale noise suppression and time sequence correlation analysis on the clean transmission electric energy data, and constructing a high-fidelity disturbance sequence. According to the method, through the hardware defect self-inspection and phase compensation steps, denoising preprocessing is carried out by utilizing wavelet packet transformation, the frequency response deviation of equipment is identified through Fourier transformation, a frequency domain interpolation method is adopted to reconstruct a frequency-closed defect mark segment, the phase deviation error can be accurately compensated, and the detection accuracy is improved. And self-systematic errors of hardware are eliminated from a data acquisition source, high fidelity of clean transmission electric energy data used for subsequent analysis is ensured, and a foundation is laid for high-precision identification.

The invention discloses a spare power automatic switching device test switch simulation test system, and belongs to the technical field of power grid simulation test. Probability distribution generated through kernel density estimation covers a fault scene of a 99% confidence interval, and the characterization capability of an extreme scene is enhanced; the time delay precision of a switch action sequence is controlled timely and reliably by combining the global search capability of quantum annealing and the local fine tuning of the particle swarm algorithm, and equipment damage caused by time sequence dislocation is avoided by combining the UWB technology and the phase compensation algorithm; through an objective function weight coefficient and a closed-loop feedback mechanism, an optimization objective can be dynamically adjusted according to a fault type, through real-time comparison of a physical device and digital twinning and through logic criterion goodness of fit analysis, control logic consistency can be guaranteed, and through loop response time difference analysis and two-dimensional index quantification, verification precision can be guaranteed. And the strict requirements of the power system on correct logic and quick action of the spare power automatic switching device are met.

The invention discloses a GNSS anti-interference closed-loop phase self-correction method based on deep learning, and relates to the technical field of satellite navigation and artificial intelligence, and the method comprises the steps: obtaining an anti-interference array output signal and weight information through an array antenna and space-time adaptive processing; extracting a carrier-to-noise ratio, a weight phase feature and historical positioning quality, and constructing a deep learning feature vector; reasoning an array element-level phase correction reference quantity by using a multi-layer perceptron model, and realizing accurate phase compensation of an array output signal by combining phase error layered modeling, quick-change disturbance prediction and weight sensitivity estimation; an anti-interference perception observation covariance dynamic scaling mechanism is introduced into RTK positioning calculation; on-line learning and model updating are triggered through a positioning quality evaluation result, so that the system has an adaptive evolution capability. According to the method, the GNSS carrier phase quality and the positioning precision under the strong interference condition can be remarkably improved, deep fusion of anti-interference processing and high-precision positioning is realized, and the method has important engineering application value.

The invention relates to a high-speed target speed estimation method based on minimum entropy coarse and fine combination fast search. The method comprises the following steps: carrying out bandwidth synthesis on a baseband signal of a linear frequency modulation stepping echo signal; performing coarse velocity search on each sub-pulse, and performing phase compensation and coherent accumulation on each sub-pulse at each candidate coarse velocity; the waveform entropy of each candidate coarse velocity is calculated, and the candidate coarse velocity corresponding to the minimum entropy value in the waveform entropies is used as the optimal coarse velocity; compensating the intra-pulse Doppler distance coupling time shift of the baseband signal; performing distance pulse compression on the signal after coarse speed compensation; and performing bandwidth synthesis on the sub-pulse signals after pulse compression, performing fine grid search, performing phase compensation and coherent accumulation on each sub-pulse by using a fine phase compensation function for each searched fine velocity, and finally performing search according to a waveform entropy minimization principle to obtain an optimal fine velocity. According to the method, high-precision speed measurement and high-resolution range profile synthesis are synchronously completed in a single-frame signal.

The invention provides a target third-order motion parameter estimation method and device based on high-order phase fusion, and the method comprises the steps: building a third-order polynomial phase model based on a radar echo signal, and carrying out the high-order phase fusion estimation, and obtaining an estimation value of a third-order motion parameter; performing third-order phase compensation based on the estimated value of the third-order motion parameter to obtain an estimated value of a second-order motion parameter; performing phase compensation on the slow time complex sequence based on the estimated value of the third-order motion parameter and the estimated value of the second-order motion parameter to obtain a compensation sequence; and converting the compensation sequence into a single-frequency slow-time complex sequence, and estimating motion parameters of the to-be-measured target based on the single-frequency slow-time complex sequence. Through step-by-step compensation of the third-order phase term and the second-order phase term, coherent focusing of target energy can be realized under the condition of not depending on dense grid search, so that the robustness and precision of maneuvering target detection are improved, and meanwhile, the requirements of a vehicle-mounted system on real-time performance and computing power cost are considered.

The invention particularly relates to a method for converting pseudo code capture into tracking phase compensation under clock frequency offset. The method comprises the steps of band-pass sampling and digital down-conversion, local pseudo code sequence generation, twice pseudo code capture and phase compensation. Selecting a sampling frequency and processing a signal through a band-pass sampling theorem, and generating a local pseudo code based on a Gold code; a PMF-FFT method of a mobile pseudo code is adopted to complete first-time pseudo code capture, a multiplexing capture module executes second-time full-range capture, and pseudo code phase offset is accurately calculated; and finally, adjusting the local pseudo code phase through the total phase compensation value, so that the phase difference between the input signal and the local pseudo code is controlled within a half chip. According to the method, hardware cost does not need to be increased, the problem of inaccurate phase compensation under clock frequency offset, large frequency offset and low carrier-to-noise ratio scenes is effectively solved, it is guaranteed that pseudo code capture is smoothly converted into tracking, and the tracking reliability of a receiver is improved.

A hydroelectric generating set PSS performance on-line evaluation method comprises the following steps: S1, data acquisition: acquiring input parameter measuring point data of a power grid side and a set side, and acquiring output data of a source network coordination simulation device and real-time operation data of a real machine SCADA system at the same time; wherein the power grid side input parameter measuring points comprise frequency deviation, active power and generator terminal voltage, and the unit side input parameter measuring points comprise rotating speed deviation, water head, guide vane opening, vibration in the xyz direction and a swing peak value; s2, performance index evaluation: calculating four core performance indexes including a damping ratio, a phase compensation degree, an adjusting speed and a robustness index based on the data acquired in the step S1; wherein the damping ratio reflects the oscillation decay speed, the phase compensation degree measures the compensation capability of the PSS for excitation system lag, the adjustment speed represents the dynamic response agility of the PSS, and the robustness index evaluates the capability of PSS parameters to adapt to different working conditions; and S3, online evaluation: sequentially executing data preprocessing and feature extraction, performance index calculation, adaptive threshold dynamic adjustment, fuzzy comprehensive evaluation, parameter optimization feedback and health report generation operation, and realizing real-time quantitative evaluation and parameter dynamic optimization of PSS performance.

The invention discloses a power feedback and phase compensation-based oscillation suppression strategy for a multi-configuration-network converter grid-connected system. The multi-configuration-network converter grid-connected system mainly comprises the following modules: a power calculation module, a virtual speed regulator module, a virtual rotor module, a reactive power-voltage droop control module and a voltage and current double-closed-loop module. In the virtual rotor module, the output active power and the output power angle are subjected to a differential link to construct a power feedback loop, the difference value between the output angular frequency of the virtual rotor and the rated power grid frequency is used as the phase compensation amount, and a power feedback and phase compensation strategy is applied; the problem that after grid connection, a multi-grid converter is prone to being disturbed by the power grid frequency to generate violent power oscillation is solved.

The invention discloses a low-voltage power line power frequency communication interference suppression and adaptive demodulation method and system, and the method comprises the steps: firstly, detecting the voltage zero crossing of a power grid in real time, and dynamically calibrating a communication time slot based on an actually measured power frequency, thereby achieving the precise power frequency synchronization; injecting a pilot signal into the synchronous time slot window, and judging line topology mutation through coupling of pilot response and a preset signal-to-noise ratio threshold, thereby completing topology perception and verification; triggering channel reestimation in combination with a topological change result, rejecting fundamental wave and multi-order harmonic interference from channel response of least square estimation, and updating a channel model by adopting a time-varying smoothing algorithm; then, a low-noise time window is determined according to the corrected zero cross point, key data packets are scheduled preferentially, and high-reliability anti-interference transmission is achieved; and finally, dynamically and cooperatively adjusting the transmitting power, the receiving filter and the phase compensation based on the newest channel and topology state to form closed-loop self-adaption. According to the scheme, the intelligent degree is high, and the communication stability and the system maintainability are greatly improved.

The invention provides a network construction type electromagnetic scale stabilization control method and system based on a phase compensator, and relates to the technical field of phase compensators, and the method comprises the steps: obtaining the virtual damping torque of each link of a network construction converter grid-connected system; identifying a system electromagnetic oscillation leading link based on the virtual damping torque of each link; constructing a second-order lead phase compensator, and designing a controller structure of the second-order lead phase compensator; calculating a phase lag angle and a margin of the electromagnetic oscillation dominant link, and calculating a phase compensation angle of a second-order lead phase compensator according to the phase lag angle and the margin; parameters of a second-order lead phase compensator are set according to the phase compensation angle, and net-building type electromagnetic scale stabilization control is carried out based on the second-order lead phase compensator after parameter setting and an electromagnetic oscillation leading link; the electromagnetic oscillation problem in traditional control is solved, and the electromagnetic oscillation stability of the system is improved.

The invention relates to a phase adaptive dynamic calibration compensation method and system based on temperature drift compensation, belongs to the technical field of vibration testing, and solves the problems of poor wide temperature precision of micro-vibration phase calibration, weak multi-frequency adaptation, incomplete full-link compensation, calibration acquisition conflict and fast aging failure in the prior art. The method comprises the following steps: determining an original calibration signal based on an analysis frequency, calculating an initial phase difference according to the original calibration signal, determining a first time compensation amount according to the initial phase difference, and carrying out first calibration compensation; acquiring environment temperature, and establishing a phase compensation model based on the environment temperature, the analysis frequency and the initial phase difference; obtaining the node temperature of the signal transmission link, determining a second time compensation amount by using the phase compensation model, and carrying out second calibration compensation; the information transmission link comprises a plurality of signal transmission nodes. According to the invention, wide temperature range, stable full-link calibration, parallel calibration and acquisition, and adaptive dynamic calibration compensation are realized, so that the micro-vibration measurement accuracy is improved.

The invention provides an integrated digital eddy current sensor system, belongs to the technical field of eddy current sensors, and can at least partially solve the problem of poor dynamic response precision in the prior art. The integrated digital eddy current sensor system provided by the embodiment of the invention is characterized in that the integrated digital eddy current sensor system has a three-stage collaborative structure, and the three-stage collaborative structure comprises a dynamic polynomial engine, a hardware acceleration unit and a phase compensation module, wherein the dynamic polynomial engine is used for generating a frequency-amplitude-phase three-dimensional mapping table by adopting a polynomial equation and outputting multiple groups of parallel coefficients to the hardware acceleration unit; the hardware acceleration unit is used for constructing a pipeline computing architecture so as to realize parameter updating and compressed encoding of a set period; and the phase compensation module is used for establishing a phase error feedback closed loop and controlling the phase error within a set error range under a reference signal.

The invention discloses a loop resistance measuring method, system and device, and relates to the technical field of electrical measurement. The method comprises the following steps of: performing loop data acquisition at each interface of the disconnecting switch adopting a three-channel wiring mode, injecting excitation current by an excitation source, and acquiring three-channel voltage original signals and initial sampling flow by a differential isolation amplifier to obtain the initial sampling flow; time sequence identification is carried out on the initial sampling flow to complete sample starting and ending point identification, inter-channel time alignment is completed, and a synchronous voltage sample set is output. According to the invention, by constructing a complete data chain covering high-precision synchronous sampling, adaptive signal processing, phase compensation calculation and intelligent statistical diagnosis, the problems of low measurement precision and insufficient anomaly identification capability caused by poor synchronism, phase error and lack of deep analysis in a traditional method are solved; the accuracy and anti-interference performance of loop resistance measurement and the intelligent level of state diagnosis are improved.

The invention provides a dynamic phase compensation method based on double DDS modules, and belongs to the technical field of digital frequency synthesis. The invention provides the following technical scheme: 1, a dynamic phase inheritance mechanism: through alternate work of double DDS modules, seamlessly transmitting an integer part and a decimal remainder contained in a phase accumulated value of a main DDS to a standby DDS during switching, and combining a shared clock source and a high-speed multiplexer to ensure phase continuity; 2, remainder compensation closed-loop control is carried out, a remainder accumulator is designed to record truncation errors in real time, FTW is dynamically adjusted through a PID algorithm, and long-term frequency error closed-loop suppression is achieved in combination with feedback of an external frequency meter; 3, according to a dual-mode triggering strategy, time period triggering and phase threshold triggering are supported, switching logic is started when a triggering condition (a fixed period or a phase threshold theta th is set) is met, and the phase accumulated value theta 1 (t) and the remainder epsilon 1 of the DDS1 are transmitted to the DDS2. According to the invention, through dynamic phase synchronization and closed-loop compensation, the problems of DDS phase accumulative errors and switching discontinuity are systematically solved.

The invention relates to the technical field of industrial automation control, in particular to a data acquisition method and system based on a digital metering technology, and the method sequentially comprises the following steps: 1, carrying out the dynamic calibration of a sensor; 2, constructing a phase compensation clock tree; 3, establishing a temperature-humidity-vibration three-factor coupled error compensation model, determining the interaction weight of each factor through an orthogonal test method, and updating a compensation coefficient on line by adopting a recursive least square method with a forgetting factor; and step 4, generating a transmission priority according to the product of the data change rate and the health degree index, dynamically allocating a transmission bandwidth based on a network quality evaluation value calculated based on the time delay change rate and the packet loss rate, and performing compressed coding of a lead code mark on high-priority data. The method not only improves the precision of the system, but also optimizes the data processing and transmission efficiency, and provides an effective solution for high-precision data acquisition in a large-scale and complex environment.

The invention relates to the technical field of optical instruments, and provides a dimple telescope system based on a double-phase regulation and control super lens and a design method thereof, and the dimple telescope system comprises an objective lens, an eyepiece, a first super lens and a second super lens. The first super lens is arranged at the imaging plane position of the objective lens, is a local phase modulation type super lens and is used for implementing local phase modulation on an imaging area; and the second super lens is arranged at the pupil entrance plane position of the eyepiece, is a continuous phase type super lens, and is used for performing phase compensation and wavefront matching on the wavefront passing through the eyepiece. According to the invention, the double-phase collaborative design of the image plane local phase modulation superlens and the entrance pupil plane continuous phase compensation superlens is introduced into the Galileo telescope system, so that the unification of local high-resolution fovea imaging in the view field and the stability of the full-view-field image quality is realized on the premise of not changing the original optical path structure; and the aberration interference problem caused by local modulation of a single super lens is avoided.

This invention discloses a phase compensation method for ship targets using ISAR based on block phase gradient autofocus. The steps include: pulse compression; range cell migration correction; range-oriented block segmentation; block phase compensation; calculation of the offset between adjacent image blocks; and image block alignment and stitching. This invention performs range-oriented block segmentation of the target echo, overcoming the shortcomings of existing technologies that ignore the spatial variation of rotational phase error, leading to defocusing in ship imaging, thus improving the accuracy of phase compensation and achieving good image focusing effect. Because this invention uses a phase gradient autofocus algorithm to compensate for the phase error within each block, and then uses a cross-correlation method to align and stitch the images of each block region, it overcomes the shortcomings of parameter estimation methods, such as complexity, time consumption, and poor real-time performance, and has the advantages of simple implementation, high efficiency, and strong real-time performance.

The application discloses a two-dimensional coherent signal DOA estimation method based on double parallel relatively prime array movement, which comprises the following steps: a double parallel array comprises a first subarray and a second subarray, phase compensation is performed on the output of the first subarray and the output of the second subarray to obtain first subarray compensation output and second subarray compensation output; a first vector is obtained based on the first subarray compensation output and the second subarray compensation output, and a second vector is obtained based on the first subarray compensation output; a sparse off-grid optimization function is constructed; accurate angle estimation of an incident signal and an X axis is obtained based on the sparse off-grid optimization function; angle estimation of the incident signal and a Y axis is obtained based on the first vector and the second vector; and angle estimation value of the two-dimensional coherent signal is obtained based on the accurate angle estimation of the incident signal and the X axis and the angle estimation of the incident signal and the Y axis. The application uses the double parallel relatively prime array to perform angle estimation of the two-dimensional coherent signal, and makes up for the deficiency of the relatively prime array in angle estimation of a coherent source.

The application discloses an active direct wave suppression method, device, computer and storage medium, which filters a received signal by using a time domain blocking matrix, suppresses an interference frequency component, and forms a new sampling sequence; and performs a discrete Fourier transform on the new sampling sequence generated after filtering to obtain a power spectrum signal after interference suppression. According to the active direct wave suppression method, device, computer and storage medium, the uniformity of a single-frequency signal in time domain sampling is utilized, alignment on a time domain waveform is realized through phase compensation, and a difference cancellation process is performed on a reference signal and an original signal, so that the frequency component is cancelled, and static reverberation is suppressed. The method is convenient to calculate, has good single-frequency direct wave interference and reverberation suppression capability, and can be used for active target detection in a single-frequency long pulse signal transmission mode, and the effective distance is improved.

The application belongs to the cross field of electric power system and power electronics technology, and particularly relates to a regional power grid power quality treatment method for multi-type subject access. By introducing advanced phase compensation, the phase lag of the detection link is calculated and fully compensated in real time, so that the extracted harmonic component is instantaneously synchronized with the actual harmonic of the power grid. In combination with an adaptive hybrid modulation technology, the dominant harmonic frequency band can be focused on compensation. A fully decoupled control based on feedforward is adopted, which eliminates the cross coupling between the d and q axis currents, so that the inner loop controller can realize fast tracking with almost no overshoot. Meanwhile, the adaptive adjustment mechanism of the PLL bandwidth ensures that the synchronization signal is fast and robust when the power grid changes.

In some embodiments, an amplifier circuit can include an input node and an output node, and an amplifier implemented between the input node and the output node. The amplifier circuit can further include a phase compensation circuit implemented between the input node and an input of the amplifier. The phase compensation circuit can be configured to provide a phase shift that depends on a control voltage. In some embodiments, the amplifier circuit can be implemented as a power amplifier circuit.

The invention discloses a phase compensation method, device and equipment for a vibration error, a medium and a product, and the method comprises the steps: obtaining a dual-channel image of a to-be-detected object, carrying out the separation coding of the dual-channel image, and obtaining a speckle pattern under a red channel and three fringe patterns under a blue channel; determining the initial displacement of a local area in the speckle pattern under each frame; performing displacement iterative optimization on the whole image of the speckle pattern based on the initial displacement to obtain an optimal displacement; and performing reverse compensation on the three fringe patterns through the optimal displacement to obtain a compensated unwrapped phase. Accurate displacement is obtained through the red channel speckle pattern, the blue channel fringe pattern is reversely compensated, the displacement detection precision and the phase compensation reliability are both considered, and high-precision and real-time compensation of phase offset errors caused by vibration in the depth direction is achieved.

The invention discloses a field programmable gate array (FPGA)-based KeyStone transformation range migration correction method, which comprises the following steps of: transposing data in a double data rate 3 (DDR3) to a range direction, performing inverse Fourier transformation in the range direction, transposing the data to an azimuth direction and storing the data back to the DDR3; zero padding is carried out on the head and the tail of data in the DDR3 by controlling the dual-port RAM; the data size and the signal parameters are transmitted into a chirp generation module to generate phase compensation so as to calculate a stepping factor; multiplying the zero-filled data by a stepping factor, and performing inverse Fourier transform along the azimuth to obtain a first transform result; carrying out conjugate processing on the stepping factor and carrying out inverse Fourier transform along the azimuth direction to obtain a second transformation result; multiplying the first transformation result and the second transformation result, and performing Fourier transformation along the azimuth to obtain a third transformation result; multiplying the third transformation result by a stepping factor, and performing inverse Fourier transform along the azimuth to obtain a fourth transformation result; and sampling the fourth transformation result in the azimuth direction and carrying out Fourier transformation along the distance direction to obtain a correction result. The method is high in correction efficiency.

The application discloses a control method and system of a three-phase three-level AC / DC converter. A multiple parallel quasi-resonant PR control method based on time delay phase compensation is adopted in the main control link of the application, the time delay is converted into a fixed phase which needs to be compensated for the fundamental wave and high-order, and the influence of the delay between sampling and output on the system is improved. In view of the frequency fluctuation of the power grid, the real-time frequency of the power grid is updated in real time through a DSOGI-FLL, and the frequency value is transferred to the phase compensation link. The compensation link calculates through the new frequency value, obtains a new transfer function after calculating new parameter values, is connected in series into the main control link, and the effect of adaptive adjustment is realized.

The invention provides a reactive compensation method and system, electronic equipment and a storage medium, and relates to the technical field of reactive compensation, and the method comprises the steps: calculating the power factor of each phase in a power grid, and obtaining a three-phase power factor; calculating the duration when the power factor of each phase is less than a preset input threshold power factor; when the duration time reaches a preset input delay time, searching a target matching split compensation type capacitor according to a split compensation strategy, and inputting the target matching split compensation type capacitor to perform reactive compensation; respectively recording the moment when the target matching separate compensation type capacitor is put into each phase and the current power factor to obtain a three-phase separate compensation input moment and a three-phase previous power factor; and when the maximum input time difference in the three-phase separate compensation input moments is smaller than the preset proportion of the preset input delay time, switching to a common compensation strategy, taking the latest moment in the three-phase separate compensation input moments as a starting point, and searching a target matching common compensation type capacitor for reactive compensation based on the three-phase pre-power factor after the preset input delay time is up. Therefore, the reactive compensation effect is optimized.

The invention relates to the technical field of motor control, and discloses an anti-locked-rotor starting control system. The system comprises a main control module, a dynamic rule base generation module, a phase compensation module, a pre-triggering module and a feedback correction module. The main control module monitors a three-phase current waveform and a rotor position signal of the motor and generates an instantaneous locked-rotor feature vector; the dynamic rule base generation module extracts a current waveform distortion mode of a historical locked-rotor event, and combines a rotor inertia parameter to construct a fuzzy rule set so as to initialize a dynamic rule base; the phase compensation module dynamically compensates the phase current waveform and constructs a stability evaluation function; the pre-triggering module triggers pre-access of the standby power supply according to the phase offset and verifies compatibility; and the feedback correction module generates a feedback parameter according to the locked-rotor risk index and the power supply verification result, and corrects the mapping relationship between the feature vector and the rule base. The system can accurately identify locked-rotor characteristics, dynamically adapt to operation parameters, actively prevent and control locked-rotor risks, and improve the starting stability of the motor.

The invention discloses an SDFT high-precision fast signal processing method and system based on linear convolution. The method comprises the following five steps: (1) obtaining the total sample number of a discrete signal x (n) to be transformed, and recording the total sample number as N; (2) a data type conversion step, namely converting the discrete signal x (n) from a double-precision floating point type into a fixed point number with a longer data bit; (3) constructing a complex number convolution kernel 1, a complex number convolution kernel 2 and a phase compensation factor by adopting a fixed point number according to the total sample number N; (4) a linear convolution step, namely linear convolution of the convolution kernel 1 and the convolution kernel 2, and taking effective linear convolution as an output frequency spectrum; and (5) a phase compensation step: performing phase compensation on the frequency spectrum obtained in the step (4) by using a phase compensation factor to obtain SDFT of the input signal x (n). Compared with an existing SDFT fast transformation processing method, the calculation precision of the method is improved by three orders of magnitude.