938 results about "Digital control" patented technology

The invention relates to the technical field of hybrid inverters, and discloses a hybrid inverter supporting reactive compensation and a control method thereof, and the hybrid inverter comprises a DC input unit, a three-phase full-bridge inversion unit, a grid-connected switching unit, a signal acquisition unit and a digital control unit. The direct current input unit comprises a photovoltaic interface, a battery interface and a direct current bus and is used for converging photovoltaic and energy storage electric energy; the three-phase full-bridge inversion unit is composed of a power device and an LCL filter and converts direct current into alternating current. The grid-connected switching unit comprises a static switch and an isolation transformer and is used for controlling power grid connection; the signal acquisition unit detects voltage and current signals; and the digital control unit judges a grid-connected mode or an off-grid mode according to the signal, calculates a reactive current reference value and generates a PWM (Pulse Width Modulation) control signal so as to realize reactive compensation control in the grid-connected mode and the off-grid mode. According to the invention, reactive power compensation capability is provided in both grid-connected and off-grid operation modes, and stable operation of the inverter in various working conditions is ensured.

The invention relates to the technical field of environmental governance and remediation, in particular to a combined contaminated site soil remediation data management method, which comprises the following steps of: firstly, integrating multi-source heterogeneous data through a unified space-time coordinate system to generate a fusion data pool, and then driving a pollution assessment model to generate a multi-dimensional space-time pollution map; and then intelligently matching a candidate repair process chain based on an associated knowledge base, performing iteration deduction through a dynamic multi-objective optimization engine to obtain an optimal repair scheme, converting the optimal repair scheme into a digital regulation and control instruction, and finally monitoring an execution state and environmental response data in real time and feeding back and updating a data pool to realize closed-loop optimization. According to the method, the data quality and the pollution evaluation accuracy are improved, the adaptability of the repair process and the cost performance of the scheme are optimized, the repair effect is ensured to be stable and reach the standard, and the efficiency and reliability of the repair project are improved.

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 present application belongs to the technical field of wireless communications and radar systems. Disclosed are a dual-band fusion and multiplexing frequency source, chips, a radio-frequency transceiver, a system, and a device. The system comprises: a full-function millimeter-wave CMOS 4+1 phased array chip, which is connected to an antenna end, and is used for realizing signal processing and frequency conversion between a millimeter-wave signal and a C-band intermediate-frequency signal, performing phase control and gain adjustment on the millimeter-wave signal, and providing an internal frequency source and a calibration function; a C-band front end, which is connected to the antenna end, and is used for receiving or transmitting a C-band signal; a C-band / intermediate-frequency transceiver multiplexing chip, which is used for performing frequency conversion between a C-band or intermediate-frequency signal and a baseband signal in a multiplexing manner, and performing signal processing and gain control on the C-band intermediate-frequency signal; a dual-band fusion and multiplexing frequency source, which is used for providing a local oscillator signal; and an all-digital control logic circuit, which is used for providing a control instruction. The present application improves the efficiency and performance of dual-band joint communications.

The invention relates to the technical field of identification control, in particular to a fastener heat treatment integrated digital control system which comprises a process sequence number setting module, a graph code analysis module, a parameter instruction generation module, a temperature zone driving judgment module and a state autonomous response module. According to the method, the fastener category and the thermal process section sequence number are subjected to combined coding and embedded into the graph code to construct the structured recognition pattern, clear identification and automatic recognition of the thermal process section sequence can be achieved, the structured sequence number is automatically extracted in combination with graph code image analysis, and the section sequence index result is generated; an instruction index relation is established through multi-section target parameter aggregation to form a structural body array, a response marking system is established in combination with temperature real-time acquisition and tolerance zone comparison, the abnormal deviation state in the processing process can be dynamically recognized, and autonomous cooling response is implemented based on the temperature deviation frequency; and the process continuity of system operation, the accuracy of a control instruction and the stability of temperature zone execution are comprehensively improved.

The invention belongs to the technical field of automatic control, and particularly relates to a digital control system for strip coiling equipment, which comprises the following steps of: firstly, comprehensively acquiring strip tension data and state characteristic information by combining a tension sensing assembly and image acquisition equipment, dynamically adjusting a braking torque parameter, and then, acquiring a dynamic control signal by taking the linear speed of a coiling machine as a target signal; the speed of the uncoiling machine and the speed of the traction roller are synchronously aligned through a following strategy, then a taper tension control mode is adopted, the tension value is dynamically adjusted in combination with real-time coiling diameter parameters, the tension stability and the coiling regularity in the coiling process are ensured, and finally the strip deviation problem is detected and processed in real time according to a closed-loop deviation correction mechanism. The equipment control strategy in the strip coiling process is deeply bound with uncoiling control, synchronous coordination, coiling control and a deviation correction core module, and the integrated control capability of multivariable coordination and self-adaptive optimization is achieved, so that the automation and intelligence level of the strip coiling process is effectively improved.

The embodiment of the invention provides an excitation signal generation method and system and a digital eddy current sensor, and the method comprises the steps: outputting a square wave signal through a pulse width modulation assembly of a microcontroller unit, and enabling the frequency and resolution of the square wave signal to be adaptive to eddy current probes with different inductance values; inputting the square wave signal into a low-pass filter for filtering, and setting the cut-off frequency of the low-pass filter, the suppression times of higher harmonics and the attenuation slope so as to output a sine wave signal with a target total harmonic distortion range; the amplitude of the sine wave signal is collected in real time, and the pulse width modulation duty ratio and the passband gain of a low-pass filter are dynamically adjusted in combination with a digital control algorithm, so that the sine wave signal is subjected to self-adaptive adjustment and correction and is output; and taking the sine wave signal as an excitation source of an eddy current probe, and driving the eddy current probe to carry out nondestructive testing. According to the invention, the excitation signal which gives consideration to high-frequency signal generation, deep harmonic suppression and digital adaptive adjustment can be generated.

The invention relates to the field of numerical control of numerical control machine tools, in particular to an intelligent cutter matching selection control method and system for a numerical control machine tool. The method comprises the specific implementation steps that a machining task digital instruction, numerical control machine tool parameters and a tool historical database are obtained, a joint parameter space is constructed, and candidate tools and initial numerical control parameters are screened; operation feedback parameters are obtained, a stability lobe graph is generated, and a machinable interval is calibrated; a multi-objective optimization model is utilized to evaluate candidate tools, an optimization scheme is output, and parameters and early warning signals are adjusted; a machine tool is controlled in a closed-loop mode through PID, tool parameters are reconfigured when a threshold value is exceeded, a lobe graph is updated, a numerical control feedback strategy is generated, and a dynamic feedback path optimization database is constructed. Through an intelligent algorithm and closed-loop control integrated by a numerical control system, adaptive optimization of tool matching and cutting parameters is realized, and the machining stability and efficiency are improved.

The embodiment of the invention discloses a delay-locked loop circuit, a clock generator, a chip and electronic equipment, and belongs to the technical field of integrated circuits. The delay-locked loop circuit includes: a digital control circuit for transmitting a first adjustment code adapted to adjust the number of delay units in a coarse adjustment phase, and determining whether to adjust the first adjustment code based on a first feedback signal; in the fine adjustment stage, a third adjustment code suitable for adjusting the delay attribute parameter of the delay unit is sent, and whether the third adjustment code is adjusted or not is determined based on the second feedback signal; in the locking phase, transmitting a second adjustment code suitable for adjusting the control voltage of the delay unit, and determining whether to adjust the second adjustment code based on the third feedback signal; and the phase detection unit is used for sending the first feedback signal, the second feedback signal and the third feedback signal to the digital control circuit. A hybrid circuit of digital design and analog design is provided, high-precision clock phase adjustment is achieved, and an output clock in a wide frequency range can also be achieved.

The invention provides an active-disturbance-rejection control method for an electromagnetic bearing two-level digital switching power amplifier embedded with model information. The method comprises the steps that an electromagnetic bearing two-level digital switching power amplifier mathematical model suitable for controller design is established based on the Fourier series theory and coil current characteristics; a direct current component in the mathematical model is defined as a modeling disturbance term, and feedforward compensation is directly carried out in the control law; parameter perturbation and an unmodeled part in the mathematical model are defined as unknown perturbation items, and real-time estimation is carried out through an extended state observer; a current item and a control input item in the mathematical model are used as known model information to be embedded into the design of the extended state observer; designing a feedback control law to carry out real-time compensation on the current item, the modeling disturbance item and the unknown disturbance item; a zero-order retainer and a current observer are adopted to carry out discretization processing on the controller, and the discretization processing is realized on a digital control platform based on a DSP (Digital Signal Processor). The method is high in current response speed and high in control precision.

The invention relates to the field of digital power supply control, and provides a parameterized digital control method and system suitable for a wide power range charging module, and the method comprises the steps: collecting an original sensor signal, constructing a slow working condition feature vector through adaptive-temperature drift compensation, and driving a physical constraint reference prediction model to generate a second baseline behavior parameter vector; monitoring a gate driving current by using a gate-drain capacitor, extracting a transient characteristic value, and quantifying the transient characteristic value into a ZVS quality factor; the slow working condition feature vector and the ZVS quality factor are fused, a correction vector is generated through an adaptive prediction model, a control parameter vector is generated in combination with a second baseline behavior parameter vector, and online updating is carried out according to feedback; executing hardware physical limit constraint according to the security constraint set, generating security parameters and abnormal flag bits, and writing the security parameters and the abnormal flag bits into a hardware register in a fixed-point manner after cooperating with ZVS quality factor arbitration. According to the method, physical constraint prediction and transient perception correction are fused, and a digital control system considering dynamic response, drift compensation and safety redundancy is constructed.

The invention discloses an eddy current displacement sensor sine constant current source excitation method, and belongs to the technical field of sensor measurement and control. The method comprises the following steps: S1, generating positive and negative symmetric reference voltages through a reference voltage source circuit; s2, outputting a square wave control signal with adjustable frequency by the control chip, and driving a switching circuit to generate a square wave taking the positive and negative reference voltage as a level; s3, processing the square wave through a filter circuit to obtain a standard sine wave voltage signal; and S4, converting the sine voltage signal into sine constant current source excitation through a Howland current source circuit, and outputting the sine constant current source excitation to a sensor probe coil. According to the invention, through combination of digital control and analog conversion, the circuit structure is simplified, the cost is significantly reduced, and convenient adjustment of the output frequency and high stability and precision of the output current are realized at the same time.

The invention relates to the technical field of digital control, and provides a digital prefabricated pump station and a digital control system.Perception data of liquid level height, pressure difference, pump set flow, blockage displacement and pipeline vibration are obtained through a perception judgment module, abnormal working conditions are comprehensively judged, limitation of parameter judgment is overcome, and a reliable basis is provided for follow-up control; the pump-valve cooperation module dynamically adjusts the opening degree of a valve through multiple parameters, optimizes the expansion amount of flexible connection in combination with pipeline vibration and blocking displacement, and cooperatively adjusts the rotating speed of a pump set based on the liquid level height, the flow of the pump set and the blocking displacement, so that linkage control over the pump, the valve and the pipeline is achieved. The energy efficiency optimization module achieves accurate prediction of the liquid level through long and short term memory network processing, optimizes the valve opening degree and the pump set rotating speed by combining a particle swarm optimization algorithm and taking pump efficiency maximization as a target, dynamically generates an optimized pump stopping liquid level, and meanwhile adjusts network parameters through deviation feedback of a predicted value and an optimized value to form a continuously optimized closed loop.

The invention provides an IO port hot plug application circuit and device, and the circuit comprises a pull-down driving module which comprises an MOS tube Mn0, a capacitor C1 and a current source, and the capacitor C1 is connected in parallel between a grid electrode and a source electrode of the MOS tube Mn0; the current source is connected to the grid electrode of the MOS tube Mn0 and provides charging and discharging current for the capacitor C1; the drain electrode of the MOS tube Mn0 is connected with an SCL or SDA signal line, and the source electrode of the MOS tube Mn0 is grounded; the positive input end of the comparator CMP is connected with a reference level, and the negative input end of the comparator CMP is connected with an SDA or SCL signal line; the digital control system comprises a feedback loop of a main switch signal Hjen of a hot plug process and a real-time driving signal Hjctrl of an MOS (Metal Oxide Semiconductor) tube of an analog circuit; the output end of the pull-down driving module is connected with the IO interface, the output end of the comparator CMP is connected to the signal detection end of the digital control system, and the Hjctrl signal end of the digital control system is connected to the control end of the pull-down driving module.

The invention discloses a control system digital model verification method, and relates to the technical field of digital control systems, and the method comprises the steps: S1, analyzing and obtaining a simulation model; s2, obtaining a hierarchical relationship of each index, distinguishing a qualitative index and a quantitative index, and determining weight information of each index; s3, obtaining verification data of the bottom layer verification index through a test; s4, performing data preprocessing on the verification data to obtain reference data for model verification; s5, acquiring a bottom-layer index in the indexes, and acquiring a verification value of the bottom-layer index; and S6, according to the weight information and the verification value of the bottom layer index, obtaining a model comprehensive verification evaluation result based on a weighted average comprehensive calculation formula. The invention also provides a control system digital model verification system. The method has the advantages of accuracy, stability, reliability and wide verification range.

The invention relates to the technical field of metal processing and digital control, and discloses a digital control method and system for copper strip rolling production, and the method comprises the steps: obtaining a technological parameter sequence and a surface image in a rolling process in real time; analyzing the dynamic change trend of the process parameter sequence to obtain parameter fluctuation characteristics; if the parameter fluctuation characteristic exceeds a preset fluctuation threshold value, identifying a microscopic adhesion position of the copper strip surface image and determining a complete distribution map of an adhesion range; analyzing by combining defect features extracted from the complete distribution map and the process parameter sequence to obtain a parameter interaction weight; and based on the parameter interaction weight, generating optimized process parameter configuration and adjusting an equipment operation state. According to the method, the problem that the control precision of the dynamic defects on the surface of the copper strip is insufficient in the prior art is solved by establishing the dynamic correlation between the process parameters and the surface defects and performing data-driven closed-loop control.

The invention relates to the technical field of submersible pumps, and discloses a submersible digital pump and a digital control system, the digital control system comprises a data acquisition module, a calculation module, an identification module, a strategy module and a control module; wherein the data acquisition module is used for acquiring operation parameters and state parameters of the submersible digital pump; the calculation module is used for calculating the operation efficiency and the efficiency deviation value of the submersible digital pump; the identification module is used for identifying the load responsiveness and the structure collaboration of the efficiency deviation value and identifying the low-efficiency operation condition of the submersible digital pump; the strategy module is used for formulating an efficiency adjustment strategy; and the control module generates a rotating speed control instruction based on the efficiency adjustment strategy, and adjusts the operation efficiency of the submersible digital pump in the low-efficiency operation condition based on the rotating speed control instruction. According to the application, intelligent identification and self-adaptive regulation and control of the operation efficiency of the submersible digital pump are realized, and the operation stability of the submersible digital pump is improved.

The invention belongs to the technical field of automatic control, and particularly relates to an improved linear gain digital control method for a power supply system. The problems that a traditional fixed linear gain digital controller is poor in control precision, robustness, response speed and stability, prone to overshoot and oscillation, heavy in calculation burden, large in hardware consumption and the like in a complex dynamic environment and a nonlinear or strong coupling system are solved. According to the method, an operation state and environment parameters are obtained and processed, and system dynamic characteristics are intelligently evaluated; calculating an optimal control gain factor in combination with a gain scheduling rule or an adaptive learning model, and applying the optimal control gain factor to a linear digital controller for dynamic adjustment; and non-linear compensation processing is carried out on the adjusted control quantity, so that accurate closed-loop control is realized. The control precision can be obviously improved, the system response can be accelerated, the external interference suppression capability can be enhanced, the hardware dependence can be reduced, overshoot and oscillation can be eliminated, and high-precision, low-power-consumption and wide-adaptability digital control can be realized.

The present application provides an all-digital multi-phase DC-DC controller. The digital DC-DC controller includes time-based analog-to-digital converters (ADCs) for converting analog voltage signals into digital-domain signals so as to benefit from gate length scaling without limited by the low voltage swing. Also, the DC-DC controller further includes a digital control circuit and a time-based modulator. The digital control circuit can control the time-based modulator in a digital domain, thereby reducing the affection caused by process, voltage and temperature (PVT) variation. Also, the time-based modulator can adjust the timing of the PWM signals and avoid the performance degradation caused by circuit mismatch. Since the digital control circuit can be fully synthesizable, it allows implementations in all kinds of digital CMOS processes with a small chip area.

The invention provides a digital control method and system based on cosmetic production characteristics, and belongs to the technical field of data processing.The method comprises the steps that firstly, a digital twinborn model of cosmetic product characteristics is built, and the model is related to formula data, technological parameters, sensory characteristics and physicochemical indexes of a product; and output sensory characteristics and physicochemical indexes can be predicted according to input formula data and process parameters. Then, order demands at least containing one or more sensory characteristic preferences of product texture, skin feeling and fragrance are obtained; then, one or more recommended production parameter sets are determined based on the recommended production parameter set order requirements and the recommended production parameter set digital twin model, the recommended production parameter sets defining corresponding recipe data, process parameters and sensory characteristics. And finally, controlling production equipment to execute production according to the recommended production parameter set. According to the invention, accurate control from personalized sensory requirements to production parameters is realized.

The invention relates to a five-dimensional mapping adaptive progress regulation and control system for data center electromechanical engineering, which constructs WBS (work decomposition structure-construction method-process-BIM (building information model-quota five-dimensional dynamic mapping, and deeply binds and associates engineering tasks, construction methods, working steps, entity components and consumption quota. By means of the scheme, second-level automatic linkage updating of the working procedure, the quota and the progress is achieved when the construction method is changed. And secondly, double calibration is performed by introducing a process weight and a dynamic correction quota, so that the error rate of progress calculation is reduced, and the accuracy is greatly improved. The system can enable the construction progress management to have real-time performance, accuracy and self-adaptability, and provides powerful support for the refined and digital management and control of engineering.

The invention discloses a digital control integrated system for an auxiliary workshop of a power plant, and relates to the field of digital control, which comprises the steps of configuring sensor layout and measuring points, acquiring operating parameters based on sensors, acquiring processing parameters based on sensors, acquiring noise data based on sensors, and acquiring parameters of a heat supply system based on sensors. A multi-level sensor arrangement and operation parameter acquisition module, an industrial Ethernet control and multi-protocol interconnection communication module, a dynamic threshold comparison and combined cycle working condition analysis module and a cooperative control and multi-system synchronous scheduling module are configured in a power plant auxiliary workshop. The closed-loop monitoring and secondary correction control module and the historical database archiving and optimization learning module realize unified acquisition, centralized control and intelligent optimization of a gas turbine control system, a steam turbine control system, a waste heat boiler control system, a chemical water treatment control module, an environmental protection monitoring system and a heat supply system adjusting device.

The invention belongs to the technical field of clock chips, and discloses an intelligent calibration multi-channel clock chip system and a control method, the system comprises a coprocessor, an initial phase-locked loop, a selector and a plurality of clock output branches; the clock output branch comprises a numerical control circuit and a frequency divider which are connected with each other; the initial phase-locked loop is used for receiving an input clock signal, performing frequency multiplication on the input clock signal to obtain a reference clock signal, and sending the reference clock signal to the numerical control circuit of the at least one clock output branch through the selector; and the numerical control circuit is used for eliminating the distributed transmission delay difference in the reference clock signal by adopting a digital compensation algorithm, generating a target clock signal according to the reference clock signal after the delay difference is eliminated, and sending the target clock signal to the corresponding frequency divider. According to the invention, the absolute synchronization error of each clock output branch can be reduced, and the application scene diversity and flexibility of the clock chip are improved.

The invention discloses a high-robustness deadbeat predictive current control method which is suitable for current control of a dual three-phase permanent magnet motor driving system, and belongs to the technical field of permanent magnet motor control. The method mainly comprises the following steps: reconstructing a motor mathematical model by adopting a space vector decoupling matrix and Park transformation to obtain a motor voltage equation under a dqxy axis; designing a linear expansion state observer; a reference value of an output voltage vector is obtained in combination with deadbeat predictive current control; time delay in the digital control system is calculated, and angle delay is compensated; and designing a closed-loop Smith predictor for compensating a time delay link to complete high-robustness dead-beat predictive current control of the dual three-phase permanent magnet motor. The current loop design in the method does not depend on motor parameters, and the method has high parameter change robustness. By introducing the closed-loop Smith predictor, large delay of the system can be effectively compensated, and high-precision current tracking is realized under low switching frequency.

The invention provides a grid-side current harmonic suppression method and device for a motor driving system without an electrolytic capacitor. The method comprises the following steps: determining first and second bus voltage harmonics based on bus voltage obtained by sampling and inverter switching frequency; correcting the bus voltage according to the first bus voltage harmonic wave and the second bus voltage harmonic wave so as to determine a reconstructed bus voltage; according to the second bus voltage harmonic, the reconstructed bus voltage, an inverter output three-phase duty ratio and a motor three-phase current, first and second network side current harmonic regulation and control voltages are determined based on a self-defined closed-loop controller; and adopting a motor alpha-axis correction voltage and a motor beta-axis correction voltage determined according to the first and second grid-side current harmonic regulation and control voltages to participate in motor SVPWM modulation to output the three-phase duty ratio of an inverter so as to suppress grid-side input current harmonics. According to the method and the device, factors such as motor operation conditions, bus voltage harmonic waves and digital control delay are comprehensively considered, the quality of grid-side input electric energy is improved, and disturbance to machine-side rotating speed and torque is reduced.

The invention belongs to the technical field of electronic digital control, and particularly relates to a digital loop control method and device for rapidly exiting circuit hardware clamping, and the method comprises the following steps: S1, carrying out the real-time monitoring and precise recognition of a clamping state; s2, digital loop feedback source switching; s3, clamping quit grading evaluation and strategy selection are carried out; s4, loop regulation under virtual current feedback; after hardware clamping occurs, the virtual current quickly replaces a current ADC measured value to serve as a feedback source, nonlinear coupling of DAC output and the current ADC measured value is effectively weakened, reference parameters and dynamically-adjusted loop control logic are matched, exit time is shortened by 90% or above compared with the prior art, and the overshoot rate is controlled to be a rated value smaller than or equal to 3%; meanwhile, in the feedback source switching process, loop state freezing is avoided, control continuity is high, switching impact is avoided, and rapid and stable quit of the hardware clamp is achieved.

The invention discloses a digital control method and system for a sweep vibration servo motor, and relates to the technical field of motor energy saving.The method comprises the steps that when a driving end makes contact with an acting object for the first time, a user is reminded to hold the working face of the driving end to make contact with the acting object at preset pressure and move to the working face track to fully cover the acting object according to a specified functional area sequence; storing a working face moving track; performing flatness analysis on the surface of the acting object based on the working surface moving track; when the acting object is in contact for the second time or above, contact pressure is obtained, in combination with the surface flatness of the acting object, a sample set of acting objects of the same type is retrieved, mode statistics is conducted, a control array set is obtained, and any control array of the control array set comprises the amplitude, the vibration frequency, the swing angle and the torque; and performing energy consumption minimum optimization on the control array set to obtain a target control array to execute energy-saving control of the sweep vibration servo motor. The technical problem that in the prior art, a sweeping vibration servo motor is large in energy consumption is solved.

The invention discloses a multiphase BUCK converter and a high-dynamic self-adaptive phase cutting method. The multiphase BUCK converter comprises a 16-phase power level, a current sampling module, an MOS driving module, a digital control module, a CMCOT simulation main control loop and a dynamic detection circuit. The MOS driving module controls a switching tube in the 16-phase power level, the current sampling module collects an inductive current signal, the input end of the CMCOT simulation main control loop is connected with the output end of the current sampling module, and a PWM control signal is output to the digital control module; the input end of the dynamic detection circuit is connected with an output signal of a voltage loop gain in the CMCOT analog main control loop, and a mark signal is generated and output to the digital control module; the digital control module generates a phase cutting signal. A phase cutting strategy is correspondingly provided, the number of PWM started by a phase cutting signal is adaptively changed, the transient voltage undershoot is reduced, meanwhile, voltage overregulation is avoided, and the transient performance is remarkably improved.

The invention relates to a multichannel neuromuscular electrical stimulation device and a control method thereof. The device comprises a multi-stage power supply generator which is provided with a booster circuit for generating N-stage voltage; a plurality of electrical stimulation channels; the digital control circuit comprises a controller and a plurality of channel control registers respectively corresponding to the plurality of electrical stimulation channels; the skin impedance detection circuit is configured to detect the skin impedance value of the stimulation part corresponding to the output electrode of each electrical stimulation channel; the multi-stage power generator further comprises a voltage selection unit for switchably connecting each electrical stimulation channel to the N voltage outputs, and the voltage selection unit is configured to select and / or switch a supply voltage for each electrical stimulation channel from the N voltage outputs according to a skin impedance value detected by the skin impedance detection circuit. According to the multi-channel neuromuscular electrical stimulation device and the control method thereof, flexible cooperative control among multiple channels and self-adaptive adjustment based on impedance are realized, and the system energy efficiency and the treatment accuracy are improved.

The invention belongs to the technical field of power supply control, and particularly relates to an improved linear gain digital signal control method applied to a power supply. Aiming at the problems of poor gain linearity, low control precision, slow dynamic response and insufficient adaptability to system parameter change in a wide load and wide input voltage range in the traditional digital control, the method comprises the following steps of: digitally acquiring power supply operation parameters at high precision, and introducing an adaptive linear gain adjustment module to calculate a target control gain. In addition, the method generates a pulse width modulation signal based on the corrected gain and digital operating parameters to regulate the power output, and samples quantized output feedback in real time. Through the scheme, the response speed and stability of the power supply system during transient load change can be remarkably improved, and power supply management with higher precision, higher robustness and faster dynamic response is realized, so that the overall performance of the power supply system is comprehensively improved.