82 results about "Pulse mode" patented technology

The invention relates to the field of sintering machine head electrostatic dust collection, and provides a sintering machine head electrostatic dust collection system which comprises an airflow homogenization unit, an electric field dust collection unit, a high-frequency pulse power supply unit, an intelligent control unit and a dust concentration detector. The airflow homogenization unit is arranged in front of the electric field dust removal unit; the high-frequency pulse power supply unit is in signal connection with the electric field dedusting unit; the intelligent control unit is in signal connection with the electric field dedusting unit and used for controlling the voltage of the electric field dedusting unit; the dust concentration detector is arranged at the outlet position of the electric field dust removal unit, and is used for detecting the outlet dust concentration of the flue gas at the outlet position of the electric field dust removal unit and sending the outlet dust concentration to the intelligent control unit; the intelligent control unit is in signal connection with the high-frequency pulse power supply unit, and when the outlet dust concentration is larger than 20 mg / Nm, the pulse mode of the high-frequency pulse unit is activated, the invention further provides an electrostatic dust collection method for the sintering machine head, and the effect of improving the electrostatic dust collection efficiency and effect is achieved.

The invention discloses a fault signal dual-mode output method of a magnetic latching relay, particularly relates to the technical field of relay control, and is used for solving the problem of low mode switching efficiency caused by an existing physical jumper mechanism. The current mechanical state of the relay is detected by receiving a remote dual-mode switching instruction; applying a driving voltage sequence corresponding to the target mode according to the state; based on the iron core residual magnetism intensity and the dynamic margin of a target mode nominal value, judging and generating a driving enabling or degaussing trigger signal; when a driving enable signal is responded, the lag time difference between the voltage rising edge and the magnetic flux jump starting point is captured in real time, and the eddy current loss characterization quantity is generated by combining the product integration of the current differential and the temperature rise; adjusting the rising slope and the duty ratio of the driving voltage sequence according to the lag time difference and the over-limit condition of the eddy-current loss characterization quantity; and finally, the matching between an execution result and a target mode identifier is verified by controlling a coil current response waveform, and the continuous holding mode and the instantaneous pulse mode are remotely and reliably switched.

The invention provides a detector signal processing circuit and a detector signal processing method, which are applied to the field of nuclear technology application, and the detector signal processing circuit comprises a detector used for generating a detection signal; the pulse mode circuit is connected with the detector and is used for performing pulse shaping on the detection signal to obtain a pulse signal; the high-order mode circuit comprises a plurality of Campbell modules connected in parallel, the input ends of the Campbell modules are connected with the detector, and the Campbell modules are used for converting detection signals into first-order signals; the current mode circuit is connected with the detector; the current module is used for converting a detection signal into a current signal; the control module is connected with the pulse mode circuit, the current mode circuit and the output end of each Campbell module. According to the embodiment of the invention, the accuracy of a neutron flux detection result can be improved, and the measurement range of the detector is expanded.

The invention discloses a start control system and control method for an air-cooled static frequency converter of a pumped storage unit, and the system achieves the precise control of multiple parameters in the starting process of the pumped storage unit through the combined use of the static frequency converter, a cooling fan, a control unit and a control module. The input end of the static frequency converter is connected with a power system and directly acts on a stator winding of the synchronous motor through the output end, stator current and exciting current of the motor are controlled in a low-frequency pulse mode, and stable starting is ensured. The cooling fan is connected with a main loop assembly of the SFC, the temperature is effectively controlled through an air circulation cooling system, and the system is prevented from being overheated. The control unit coordinates all devices in the whole starting and stopping process, and the synchronous motor is smoothly switched to normal synchronous operation from a low-frequency pulse starting mode.

The invention discloses a radio frequency matching method, a radio frequency matcher and a storage medium, which are used for solving the problems of matching dead zone and overlong time. Load impedance is detected through a load state sensor, input impedance is adjusted through an impedance adjusting network, and the impedance adjusting network comprises adjustable capacitors C1 and C2; and constructing a loss function L based on the modulus square of the reflection coefficient gamma, calculating the gradient and iteratively adjusting the capacitance parameter. The main control module drives the vacuum capacitor to continuously adjust, dynamic optimization is carried out in combination with a gradient descent algorithm, discrete limitation and dead zones of a traditional table look-up method are eliminated, pulse mode microsecond-level rapid matching is adapted, and radio frequency overshoot is restrained. The method improves the matching precision and speed under a dynamic load (such as plasma), gives consideration to the stability of a complex process, and is suitable for the technical processes of semiconductor etching and the like.

The invention discloses a periodic forked near-transformation limit nanosecond pulse mode-locked fiber laser and a generation method. The laser is characterized in that a fiber ring cavity comprises a wavelength division multiplexer, an erbium-doped fiber, a first polarization controller, a polarization analyzer, a dispersion control unit, an output coupler, a fiber isolator and a second polarization controller which are sequentially connected in a closed loop mode. The method comprises the steps that pumping continuous light is coupled into the laser through the wavelength division multiplexer; pumping continuous light is absorbed by using an erbium-doped fiber and is stimulated to radiate a gain pulse with a long wave band, and the generated pulse oscillates in a fiber laser cavity; under the combined action of a first polarization controller, an analyzer and a second polarization controller, an equivalent saturated absorption effect is generated by utilizing nonlinear polarization rotation generated when gain pulses are propagated in an optical fiber, and pulse mode locking is realized; the optical fiber laser works in an abnormal dispersion region, so that generated pulses meet the soliton area theorem, and near-transformation limit pulses are generated. According to the invention, nanosecond pulse period bifurcation output of the short-cavity fiber laser can be realized.

The embodiment of the invention provides a level shifter. An input circuit receives an input signal operated in a first level. A second level supplied by a second level line coupled to a pull-up circuit is higher than the first level, and a first coupling point of the pull-up circuit and the input circuit is used as an output end of the level shifter. An acceleration circuit is coupled to the first coupling point to accelerate the low-to-high transition of the output terminal. An acceleration controller coupled to the acceleration circuit includes a plurality of pulse generating transistors having first sides connected in series. Particularly, in the pulse generation transistors connected in series at the first side, different transistors respectively receive driving signals with time differences so as to be instantly conducted, so that the acceleration circuit is enabled in a pulse mode, and the driving signals received by the different transistors are from the input signals.

According to the energy transmission and signal transmission method of the passive wireless lock, energy is sent in a discontinuous pulse mode, the power supply function is achieved, signal transmission is achieved through time sequence coding of pulses, and through the pulse coding mechanism, the signal transmission efficiency is improved. Energy transmission and signal transmission do not need independent hardware modules any more, the system design is simplified, the transmission efficiency is also improved, and the method comprises the following steps that S1, pulse type energy transmission and a time coding mechanism are adopted for signal transmission; s2, setting a synchronization and decoding mechanism of signal transmission; s3, integrated design of energy transmission and signal transmission; s4, the anti-interference capability in the transmission process is improved; and S5, improving the system safety.

The invention discloses a PWM waveform output device supporting a single pulse mode and an application method thereof.The device comprises a register module, a pulse number control processing module and a pulse delay control processing module, and the register module is connected with the control end of the pulse number control processing module and the control end of the pulse delay control processing module; input PWM square waves firstly enter the pulse number control processing module for number control, and then are subjected to delay control through the pulse delay control processing module to obtain output PWM square waves. On the basis that the high-precision pulse width modulator outputs PWM square waves with adjustable frequency and duty ratio, the PWM waveforms with fixed delay and quantity are automatically output through mode enabling after relevant configuration is carried out according to user requirements, it is ensured that the specific requirements of users are met, and the phenomenon of repeated sampling is avoided.

The present application relates to the technical field of mechanical fault diagnosis, and particularly relates to an engine main bearing quantitative diagnosis method based on adaptive filtering and impact enhancement; comprising the following steps: S1, using a pulse mode decomposition method, carrying out pulse mode extraction, and obtaining a residual signal of the extracted pulse mode; comprising the following steps: S11, assuming a pulse mode, obtaining a pulse mode sparsity quantitative index of the pulse mode; S12, constructing an adaptive filter set, extracting the pulse mode according to the adaptive filter set, and thus obtaining a residual signal; S2, based on the residual signal obtained in step S1, reconstructing a signal of a signal collected by the engine main bearing, and obtaining a reconstructed pulse envelope; S3, according to the pulse envelope, obtaining a standard decibel of the impact pulse value, and according to the standard decibel, evaluating the health state of the main bearing; the effectiveness of the diagnosis of the aero-engine main bearing is improved.

The application discloses a kind of parallel random number generation devices based on pulse driving micro-ring resonator cavity, by adopting pulse mode driving micro-ring resonator cavity, improve the instantaneous power level in cavity, enhance nonlinear effect, to effectively expand the effective bandwidth of chaotic entropy source, improve the complexity of entropy source.Meanwhile, using the characteristics that micro-ring resonator cavity naturally supports multi-wavelength output, and combining with filter demultiplexing structure, the parallel output of multiple chaotic entropy sources is realized, which is beneficial to improve the parallel generation ability of random number.Finally, by combining post-processing methods such as difference, quantization and decorrelation, the overall generation rate of random bits is improved while ensuring randomness quality.The application has relatively simple structure, is suitable for integrated implementation, and can meet the application requirements of high-speed parallel random number generation.

The invention provides a dynamic frequency scanning method based on a radio frequency power supply pulse mode and related equipment, and relates to the technical field of radio frequency power supplies. The method comprises the following steps: acquiring an initial control parameter; monitoring the operation mode of the radio frequency power supply in real time, and iteratively adjusting the output frequency of the radio frequency power supply based on the dynamically adjusted frequency step length when the radio frequency power supply is in a pulse mode so as to determine the optimal frequency which enables the radio frequency power supply to realize impedance matching and enables the reflection coefficient to be minimum; and controlling the radio frequency power supply to operate at the optimal frequency. The method aims at solving the problems that in the prior art, when a radio frequency power supply is in a pulse mode, dynamic change of load impedance causes that a traditional impedance matching method is difficult to adapt rapidly, and then power transmission efficiency is affected, reflection power is increased and energy consumption is increased, scanning can be completed rapidly and stably, impedance matching and low reflection power are achieved, and the power transmission efficiency is improved. And the excitation accuracy of the radio frequency plasma is improved.

The invention discloses an intelligent optimization method and system for the shortest pulse in an ultrafast fiber laser, and belongs to the field of automatic control of ultrafast fiber lasers. The method comprises: sampling the output signal of a mode-locked laser to form a data set; using the data set to train a recursive neural network combined with an attention mechanism, and inputting a target mode-locked spectrum to obtain an angle solution set; using a BFGS algorithm to search for an angle solution of a spectrum corresponding to the shortest pulse mode-locking, and based on this, generating a control signal to achieve automatic mode-locking; entering a spectrum monitoring mode, and if a loss of lock is detected, the maximum angle adjustment step is S max , the initial adjustment angle step is 0.2°, and the adaptive recovery algorithm is executed; if the locking mode is successfully restored, it switches to the spectrum monitoring mode, otherwise the adaptive recovery algorithm is executed; if the adjustment step is less than S max , the adaptive recovery algorithm is executed; otherwise, the network is retrained. The problem that ultrafast fiber lasers based on nonlinear polarization rotation cannot be quickly locked and are prone to losing lock is solved.

Systems and methods for interrogating a plurality of backscatter node devices in a wireless backscatter communication system are provided. The method may include transmitting one or more interrogator pulse signals from an interrogator device; for each of the one or more interrogator pulse signals, receiving at the interrogator device a raw backscatter signal including individual backscatter signals from each of the plurality of backscatter node devices, wherein each individual backscatter signal includes a reflection of the interrogator pulse signal modulated based on an input modulation signal of the respective backscatter node device; processing the one or more raw backscatter signals to determine a mapping model between the input modulation signal of each of the plurality of backscatter node devices and the one or more raw backscatter signals; and extracting one or more signals of interest based on the mapping model, wherein each signal of interest corresponds to an input modulation signal of a backscatter node device.

A system comprises an electromagnetic pulse generation system that comprises a first pulse generation circuit, a second pulse generation circuit, and a mixing circuit. The electromagnetic pulse generation system is operable to output a first pulse generated by the first pulse generation circuit onto a first signal path, output a second pulse generated by the second pulse generation circuit onto the first signal path, generate a third pulse by mixing, via the mixing circuit, a fourth pulse generated by the first pulse generation circuit and a fifth pulse generated by the second pulse generation circuit, and output the third pulse on the first signal path.

The invention relates to the technical field of PCB (Printed Circuit Board) processing, and discloses a preparation method for realizing no residual copper in a PCB back drilling signal hole by adopting alkaline etching, which comprises the following steps of: stacking a substrate of which the inner layer is etched with graphic data, a semi-fixed sheet and an outer-layer copper foil according to a preset stacking structure, and pressing into a whole through a vacuum hot press; a signal hole is machined in the position of the signal hole in a mechanical drilling mode; depositing a layer of chemical copper in the signal hole, and then electroplating a layer of thin copper, wherein the thickness of the electroplated copper is 4-10 [mu] m; electroplating a protective metal layer on the electroplating copper layer; and the residual copper of the signal hole part is removed in a secondary drilling mode. The invention aims to adopt a pulse mode to carry out flash plating on thin copper on the hole wall and then electroplate metal tin on a copper protection layer on the hole wall. According to the actual residual copper length level and the rapid flash plating thin copper layer thickness after mechanical drilling, redundant residual copper is removed in an alkaline etching and rapid flash etching mode, and the purpose that no residual copper exists in the back drilling signal hole is achieved.

The application discloses a semiconductor process equipment and a pulse-regulated plasma method thereof, and belongs to the technical field of semiconductor processes. The pulse-regulated plasma method comprises the following steps: setting a first pulse to control synchronous opening and closing of a high-frequency radio frequency power supply and a low-frequency radio frequency power supply through the first pulse; setting a second pulse to sequentially form a plurality of different power control periods in each radio frequency cycle of the low-frequency radio frequency power supply through the second pulse; and adjusting power amplitude of the high-frequency radio frequency power supply to different power values in the different power control periods to regulate plasma of the semiconductor process equipment. According to the technical scheme, the power amplitude of the high-frequency radio frequency power supply in different stages is changed to form different pulse modes in each radio frequency cycle of the low-frequency radio frequency power supply, so that different etching requirements of products can be met.

The system is used for detecting and evaluating the influence of a water film formed on the outer surface of the windshield glass on the definition of the windshield glass, and is characterized by comprising a water film thickness detection device arranged on the inner surface of the cockpit side of the windshield glass and used for detecting the thickness of the water film formed on the inner surface of the cockpit side of the windshield glass. The infrared detector can emit infrared light towards the outer surface side of the windshield glass in a pulse mode and receive reflected infrared light as a detection signal. The control device sends a control signal to the water film thickness detection device and can drive the water film thickness detection device to emit infrared light at a specified frequency through the control signal; and the calculation device receives the detection signal from the control device or the water film thickness detection device, and can determine a definition index capable of representing the definition of the windshield glass as a calculation result based on the detection signal. Therefore, the influence of the water film formed on the outer surface of the windshield glass on the definition of the windshield glass can be detected and evaluated in real time.

The application discloses a control method of a tubular PECVD film coating device, a solar cell film layer preparation method and a solar cell. The control method of the tubular PECVD film coating device comprises the following steps: during the common operation of a first radio frequency power supply and a second radio frequency power supply, the first radio frequency power supply and the second radio frequency power supply work in a pulse mode, a part of rising edges of the first radio frequency power supply does not coincide with at least a part of rising edges of the second radio frequency power supply, the transient electric field between two graphite boats can be avoided from being too large, and the process gas can be prevented from being ionized to form powder in the too large transient electric field, on the basis, the pulse width of the first radio frequency power supply and the pulse width of the second radio frequency power supply are partially overlapped, and the synergistic effect is enhanced.

The invention discloses a laboratory particle-gas cooperative detection method based on an aerosol adsorption mechanism, and relates to the technical field of gas detection. The method comprises the following steps: step 1, conveying a to-be-detected sample airflow at a constant speed, enabling the to-be-detected sample airflow to pass through a blank integrated adsorption carrier, and collecting a pure background signal; 2, a layered hydrophilic-hydrophobic adsorption film is deposited on the surface of the integrated adsorption carrier in situ, and the functionalized integrated adsorption carrier for laboratory particle-gas collaborative detection is obtained; step 3, enabling the to-be-tested sample airflow to pass through the functionalized integrated adsorption carrier in a pulse mode; the method comprises the following steps: obtaining an original particle-gas synergistic signal through optical-acoustic double-path excitation by utilizing a micron-sized spiral pore channel of a layered hydrophilic-hydrophobic adsorption film; and 4, performing multi-section spiral vector trade-off processing on the obtained original particle-gas cooperative signal. The system is quick in response, high in interference resistance and suitable for high-reliability particle-gas cooperative monitoring in a complex environment of a laboratory.

This invention discloses a control method and system for permanent magnet synchronous motors based on adaptive weights in gradient prediction pulse modes. The method includes: 1) establishing a discretized current gradient prediction model considering delay compensation and motor DC voltage feedback, and reconstructing a reference current trajectory with harmonic characteristics using a nominal optimized pulse mode; 2) designing a degree-of-freedom control logic based on nonlinear mapping to address the performance mismatch problem caused by fixed weights in the prediction cost function; and 3) dynamically adjusting the weighting factor by evaluating the normalized composite index of motor torque and current in real time. During acceleration transients, low weights are used to release the degrees of freedom at the pulse switching moment of the three-phase inverter, accelerating motor torque establishment. During steady-state cruise, high weights are used to strengthen the inverter pulse position constraint, locking in the optimal harmonic distribution. This invention solves the problem of balancing dynamic response and steady-state harmonics in permanent magnet synchronous motors, significantly improving the transient quality and voltage disturbance robustness of the motor control system.

The application discloses a high-frequency pulse DC power output stability control device and belongs to the technical field of power supply control. The device proposes a state zeroing-knowledge injection control paradigm for the contradiction between overshoot and slow response after reset of the traditional controller in the pulse mode due to integral memory. At the starting moment of each pulse period, a pulse opening instruction is generated and a reset signal is generated with a delay, the integral capacitor is forced to discharge to make its output zero, and the overshoot risk is eliminated; according to the load current steady-state value collected during the last pulse off period and the current target duty cycle, a feedforward control value is determined; in the same control period when the integral value is zeroed, the feedforward value and the integral output value are added to generate a drive control signal, and finally the drive power switch output pulse current is modulated. Through the cooperation of physical state forced zeroing and system knowledge cross-period prediction injection, the application realizes the rapid and non-overshoot establishment of the pulse current, and effectively solves the dynamic performance bottleneck of the high-frequency pulse power supply.

The application discloses a kind of cooling method, device, magnetic suspension motor of magnetic suspension motor, storage medium and computer program product, motor winding of magnetic suspension motor is equipped with coolant pipeline, and electronic expansion valve is equipped on coolant pipeline;The method comprises: after magnetic suspension motor starts to work, the target opening of electronic expansion valve is determined according to the temperature of motor winding;Pulse mode is used to power on electronic expansion valve, and the energization time of electronic expansion valve is controlled according to the action frequency of electronic expansion valve, so that the opening of electronic expansion valve reaches the target opening while reducing the energization time of electronic expansion valve, reduce the heat at the place of electronic expansion valve.The scheme, by pulse mode to power on electronic expansion valve, and the energization time is controlled according to the action frequency of electronic expansion valve, so that the energization time of electronic expansion valve is reduced, the heat at the place of electronic expansion valve is reduced, avoid electronic expansion valve high temperature failure, ensure that magnetic suspension motor is stably operated.

The application provides a six-pulse positioning method, a motor driving control method, a module and a system, which comprise a motor control sequence generator, a programmable motor driver and an analog-to-digital converter; the motor control sequence generator outputs a preset six-pulse wave sequence one by one based on a first trigger signal output by the programmable motor driver in a six-pulse mode, and provides a duty cycle control signal and an upper and lower phase output mode control signal; the programmable motor driver is connected to the output end of the motor control sequence generator, and generates a corresponding PWM signal based on the output signal of the motor control sequence generator; and the analog-to-digital converter collects the total motor current of each cycle of the PWM signal in the six-pulse mode, and then calculates the current rotor position according to the current information. The application has low cost, short code length, small program complexity and simple operation steps.

The application relates to the field of sintering machine head electrostatic dust removal, and provides a sintering machine head electrostatic dust removal system which comprises an airflow homogenizing unit, an electric field dust removal unit, a high-frequency pulse power supply unit, an intelligent control unit and a dust concentration detector; the airflow homogenizing unit is arranged before the electric field dust removal unit; the high-frequency pulse power supply unit is signal-connected to the electric field dust removal unit; the intelligent control unit is signal-connected to the electric field dust removal unit and used for controlling the voltage of the electric field dust removal unit; the dust concentration detector is arranged at an outlet position of the electric field dust removal unit, the dust concentration detector is used for detecting the outlet dust concentration of flue gas at the outlet position of the electric field dust removal unit and sending the outlet dust concentration to the intelligent control unit; the intelligent control unit is signal-connected to the high-frequency pulse power supply unit, and when the outlet dust concentration is greater than 20 mg / Nm3, the pulse mode of the high-frequency pulse unit is activated; a sintering machine head electrostatic dust removal method is also provided; and the application has the effects of improving the efficiency and effect of electrostatic dust removal.

An electrical converter (10) comprising: a main stage (12) adapted to convert a DC voltage to an intermediate voltage comprising at least two voltage levels; and a filter cell stage (14) having, for each phase of the main stage (12), a filter cell (30), each filter cell (30) being adapted to add or subtract a cell voltage of said filter cell (30) to or from an intermediate voltage. A method for controlling an electrical converter (10) comprises a pattern determination section (44) comprising the steps of: selecting and reading an off-line calculated optimized pulse pattern (OPPbase) from a database, where the selected optimized pulse pattern (OPPbase) comprises switching timings of a primary stage (12) and a filter unit (30) on a next calculation window (alphawin) of a predetermined width (alphaw); the optimization pulse pattern (OPPbase) is adjusted by shifting the switching time of the optimization pulse pattern (OPPbase) in such a way that an average output voltage generated in the filter unit (30) is shifted towards an average output voltage reference (Uba1, abc) of the filter unit (30), which average output voltage reference (Uba1, abc) is determined as a function of a measurement in the filter unit (30), and the adjustments are compensated by a corresponding modification of the switching time of the main stage (12). The method further includes a model predictive control section (46) including steps performed several times during the next calculation window ([alpha] win): modifying the adjusted optimization pulse pattern (66) by moving at least one transition time of the switching time, such that a flux error determined from the difference between the estimated flux (74) of the electrical converter (10) and the reference flux trajectory (psi ref) is minimized; and applying at least a next switching time to the electrical converter (10) according to the modified adjusted pulse pattern.

The present invention provides an emergency stop device and method for a hydraulic support on a working surface, and the corresponding device includes: a logic control circuit, which is used to detect the emergency stop signal of the hydraulic support on the working surface and generate and send a pulse signal corresponding to the emergency stop signal; a drive circuit, which is connected to the logic control circuit, and is used to enhance the driving ability of the pulse signal to generate a first pulse signal, and send the first pulse signal to the bus between adjacent supports and a receiving circuit; a receiving circuit, which is connected to the drive circuit and the bus, and is used to receive a second pulse signal sent by the drive circuit of an adjacent support through the bus, or receive a first pulse signal, and send the first pulse signal to the logic control circuit. The present invention can effectively solve the problem of low real-time and low reliability of the existing emergency stop mechanism, without adopting a data message parsing method, and directly adopts a pulse method, which is simple, reliable and has high real-time performance.

The invention discloses a double-wire double-pulse MIG welding power supply system based on fractional calculus. The double-wire double-pulse MIG welding power supply system comprises a host power supply, a slave power supply, a DSP control module, a master wire arc load and a slave wire arc load. One end of the host power supply is connected with a three-phase AC power grid, and the other end is connected with the main wire arc load. One end of the slave power supply is connected with the three-phase alternating current power grid, and the other end is connected with the slave wire arc load; the host power supply and the slave power supply are respectively connected with the same DSP control module, and the DSP control module is integrated with a fractional calculus control module; and the fractional calculus control module outputs four paths of pulse width modulation (PWM) signals to respectively control on and off of a switching tube of the host power supply and a switching tube of the slave power supply, so that the system enters a double-pulse mode to work. Complex nonlinear and time-varying dynamic characteristics of a welding arc and a molten pool system can be described and matched more accurately.

The invention discloses a Wi-Fi intelligent flowerpot based on an STM32 microcontroller and an intelligent plant maintenance method. The intelligent flowerpot comprises a pot body assembly, an environment sensing module, a main control unit, an execution mechanism module and a communication unit. The main control unit carries out calibration, filtering and compensation correction on the original data of the sensor through the data preprocessing module; calculating a soil humidity reduction rate, an evaporation trend and an illumination change gradient through a trend prediction module; and performing intelligent decision making by integrating the environmental parameter value and the change trend through a multi-factor coupling decision making module, and generating a control instruction. And the execution mechanism module carries out irrigation and segmented PWM light supplement execution according to a pulse mode. And the communication unit supports cloud interaction and is seamlessly switched to a local intelligent control mode when the network is disconnected. According to the invention, high-precision perception, feedforward prediction maintenance, multi-factor coupling intelligent decision and precise execution are realized, and the problems of rough perception, decision lag, extensive execution and dependence on the cloud end of the existing intelligent flowerpot are effectively solved.

The present invention discloses a two-degree-of-freedom predictive control method for an LCL filter-type three-phase grid-connected inverter system, belonging to the field of power electronic converter control. A predictive control reference instruction is obtained by sampling the parameters of the inverter-side current, capacitor voltage, grid-side current, and grid voltage at time k, and a continuous and discrete model of the LCL filter-type three-phase grid-connected inverter system is established. A control function based on the grid-side current reference tracking error and its gradient is designed, and a predictive model is established. A predictive cost function based on the control function is constructed, and the predictive control reference instruction is obtained using the minimum value of the predictive cost function. The optimal voltage vector and action duty cycle are then determined based on the predictive control reference instruction, and a control pulse signal is generated according to a symmetrical five-segment pulse mode. The control pulse signal acts on each switch tube in the inverter to achieve predictive control of the LCL filter-type three-phase grid-connected inverter system. The method has simple steps, is easy to use, has a constant switching frequency, and has good stability.