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1947 results about "Mode control" patented technology

Battery state of health (SOH) cooperative control method and system of dynamic reconfigurable energy storage system

The invention provides a battery state of health (SOH) cooperative control method and system of a dynamic reconfigurable energy storage system, and belongs to the field of battery health. The method comprises the following steps: designing a multi-time-scale SOH real-time identification model based on transient characteristic quantification, and realizing second-level updating of an electric core-level health state map; and by adopting power-SOH dynamic matching double-layer reconstruction control, the health and balance of the battery pack are ensured. In addition, the SOH tracking error is less than 1.5% by utilizing a distributed collaborative observer and topology adaptive state estimation; dual-mode control is realized through model predictive control and grouping dynamic optimization; and finally, topology is optimized by using a deep learning strategy and a life loss entropy objective function, series-parallel mode life equalization is realized, and the combined life cycle of the system is prolonged. According to the invention, the service efficiency of the battery can be effectively improved, the service life of the battery is prolonged, and the reliability and stability of the whole energy storage system are greatly enhanced.
Owner:HUADIAN INNER MONGOLIA ENERGY CO LTD +2

PFM-PWM dual-mode control method for high-voltage direct-current power supply with wide output voltage range

The invention relates to a PFC-PWM (Pulse Width Modulation) dual-mode control method for a high-voltage direct-current power supply with a wide output voltage range. The output current of the high-voltage direct-current power supply is detected in real time, the critical threshold value of the load impedance is mapped into the hysteresis interval of the output current, the theoretical boundary of mode switching is obtained, and the control mode is dynamically adjusted. In order to further guarantee smooth switching of the two control modes, hysteresis control logic is designed, and undisturbed smooth switching of the PFM mode and the PWM mode is achieved. Based on an energy equivalence principle and a frequency consistency constraint of a critical load SWL working point, a current threshold criterion and a parameter pre-synchronization strategy are constructed, seamless connection of a mode switching process in a frequency domain and an energy domain is ensured, a transient oscillation risk is remarkably reduced, and a guarantee is provided for continuous and stable output of a full-range load working condition.
Owner:SHENYANG SCI INSTR RES CENT CHINESE ACAD OF SCI

Intelligent mold part machining cutting tool control method and system

The invention discloses an intelligent mold part machining cutting tool control method and system. The method comprises the following steps that S1, a multi-source sensing information collection layer is established; s2, constructing a cutter health knowledge graph; s3, generating a dynamic decision control instruction; s4, executing a bimodal control response; and S5, realizing closed-loop control optimization. Through quadruple mechanism coupling of global coverage of a multi-mode sensing layer, dynamic deduction of a knowledge graph decision-making layer, risk isolation of a double-track execution layer and intelligent evolution of a closed-loop optimization layer, the method is realized in an industrial control domain for the first time: raising a sensing dimension, and converting a physical world fragmentation signal into a cutter full life cycle digital twinborn body; reconstructing decision logic, replacing traditional threshold judgment with topological correlation, and foreseeably inhibiting ill-conditioned failure; the system is ecological and self-consistent, and the control strategy continuously evolves in operation to form the anti-interference capability; and finally, normal form transition of tool wear control from passive remediation to active immunity is achieved.
Owner:苏州勖祥精密科技有限公司

Cooperative control method and device of energy storage converter

The invention relates to the technical field of energy storage control, and discloses a cooperative control method and device for energy storage converters, and the method comprises the steps: carrying out the recognition and judgment of the strength of a power grid through employing an artificial intelligence algorithm based on the grid-connected point electrical parameters of a target energy storage converter, selecting a target operation mode, controlling each energy storage converter in a field to be switched to the target operation mode, the target operation mode comprises a network following mode or a network construction mode; and for each energy storage converter, if the system is disturbed, issuing a corresponding charging and discharging active power instruction to the energy storage battery according to the output of the energy storage battery in the energy storage converter and the SOC state. According to the invention, the power grid strength is intelligently judged based on the grid-connected electrical parameters, and the operation mode is automatically switched, so that the energy storage system can stably operate under different power grid conditions, the power quality can be improved by adopting a grid following mode in a strong power grid, and the system supporting capability is enhanced by adopting a grid construction mode in a weak power grid, and the overall power grid adaptability is improved.
Owner:HUADIAN ELECTRIC POWER SCI INST CO LTD +1

Test mode control circuit, method and chip

The invention belongs to the field of chip testing, and provides a test mode control circuit and method and a chip. The circuit comprises a data clock width identification module, a data time sequence generation module and a test control module, wherein the data time sequence generation module is respectively connected with the data clock width identification module and the test control module. The data clock width identification module receives test mode data and a clock single-line signal through an input / output pin of the chip, and processes the test mode data and the clock single-line signal to obtain a first signal; the data time sequence generation module receives test mode data and a clock single-line signal through an input / output pin of the chip, and processes the first signal according to the test mode data and the clock single-line signal to obtain a second signal; and the test control module detects the second signal, and if the second signal is matched with a preset signal, the chip enters a test mode. According to the invention, through a single-line transmission technology, the chip can enter a test mode only by multiplexing one input / output pin of the chip.
Owner:SHENZHEN LOWPOWER SEMICON CO LTD

Low-power-consumption vehicle-mounted intelligent Internet of Things terminal device and control method thereof

The invention discloses a low-power-consumption vehicle-mounted intelligent Internet of Things terminal device and a control method thereof. The terminal device comprises a voltage monitoring module and a mode control module. The voltage monitoring module periodically samples the input voltage of the terminal device at a preset sampling frequency to obtain a plurality of voltage sampling values; the mode control module judges the continuous state of the input voltage based on the plurality of voltage sampling values, controls the terminal device to enter a normal mode of full-power operation of all functional modules when the input voltage is continuously in a state greater than or equal to a first voltage threshold value, and controls the terminal device to enter a normal mode of full-power operation of all functional modules when the input voltage is continuously in a state less than the first voltage threshold value. Controlling the terminal device to be switched to a low-power-consumption mode in which part of functional modules are closed, and controlling the terminal device to enter a sleep mode when the input voltage is continuously in a state smaller than a second voltage threshold value; wherein the second voltage threshold value is lower than the first voltage threshold value.
Owner:HUBEI SAN LING SPECIAL PURPOSE VEHICLE CO LTD +1

Multi-mode control method and device for energy storage converter

The invention relates to a multi-mode control method and device for an energy storage converter. The method comprises the following steps: aiming at the operation of an energy storage converter in a network following mode, establishing a second-order infinite impulse response IIR filter, and establishing a low-voltage ride-through control strategy based on conforming to repetitive control; for the operation of the energy storage converter in an off-grid mode, a three-phase four-bridge-arm topology is adopted to provide a zero-sequence path, and a preset proportional multi-resonance control strategy is established; establishing a parallel pre-synchronization control strategy aiming at the operation of the energy storage converter in a network construction mode; and realizing multi-mode control of the energy storage converter based on a low-voltage ride-through control strategy conforming to repetitive control, a preset proportional multi-resonance control strategy and a parallel pre-synchronization control strategy. Any resonant frequency and filtering radius can be set to suppress the harmonic peak, the system stability is ensured, meanwhile, compared with a traditional pre-synchronization method, pre-synchronization can be completed without additional control links by only utilizing the self frequency modulation characteristic, and control resources are greatly saved.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY

Method for improving stability of sending-out system of deep and far sea wind through double-port light-weight current converter

The invention discloses a method for improving the stability of a system for sending out deep and far sea wind through a dual-port light converter. The method comprises the following steps: introducing a voltage feed-forward path comprising a phase compensator and a low-pass filter into an MMC differential mode control loop in the dual-port light converter; and a compensator parameter feasible region is calculated based on the phase characteristics of the oscillation risk frequency band, and the cut-off frequency of the filter is set, so that targeted phase compensation and impedance remodeling are realized, and the damping of the dual-port light converter is effectively enhanced. According to the method, the impedance characteristic of the dual-port light-weight current converter in the oscillation risk frequency band is remarkably improved, and a reliable technical path is provided for improving the stability of the dual-port light-weight current converter.
Owner:ZHEJIANG UNIV +1

Active filter harmonic suppression and dynamic compensation system based on IGBT (Insulated Gate Bipolar Translator) multi-mode regulation

The invention relates to the technical field of reactive power compensation of a power system, and discloses an active filter harmonic suppression and dynamic compensation system based on IGBT (Insulated Gate Bipolar Translator) multi-mode regulation and control. The system comprises a control module; the high-frequency harmonic detection module is electrically connected with the control module and is configured to detect a power grid harmonic signal in real time at a sampling rate of 200kHz and transmit the power grid harmonic signal to the control module; the IGBT gate driving compensation circuit is electrically connected with the control module and a preset IGBT module, and the control module dynamically adjusts the dead time and the switching frequency of the IGBT module through the IGBT gate driving compensation circuit; the IGBT junction temperature observer is electrically connected with the IGBT module and the control module and is configured to monitor the junction temperature of the IGBT module in real time and trigger the control module to start a derating protection mechanism when the junction temperature exceeds 125 DEG C; wherein the control module generates a PWM (Pulse Width Modulation) compensation waveform through a model prediction control algorithm unit based on a detection signal of the high-frequency harmonic detection module, so as to drive the IGBT module to execute harmonic compensation through the IGBT gate driving compensation circuit.
Owner:SHENZHEN ZHONGKE XINGRUI ELECTRIC CO LTD

Closed-loop mold adjustment control system and method for injection molding machine based on multi-sensor fusion and self-adaptive algorithm

The invention relates to the technical field of intelligent control of injection molding machines, in particular to an injection molding machine closed-loop mold adjustment control system and method based on multi-sensor fusion and a self-adaptive algorithm, and the system comprises a sensing layer which adopts a multi-sensor fusion closed-loop feedback architecture and comprises a pressure sensing array, a displacement sensing unit and a temperature sensing array. The data acquisition module is used for synchronously acquiring mold clamping force, position and temperature data of a mold, constructing a three-dimensional error compensation model and realizing dynamic correction of the parallelism of the mold through space force field analysis; the execution layer comprises a servo motor, a belt wheel and a ball screw and is used for adjusting the position of the template; a double-closed-loop control module is arranged in the control layer, the double-closed-loop control module comprises outer ring mold clamping force control and inner ring position control, mold clamping force deviation serves as input of an outer ring, position correction is generated through a self-adaptive PID algorithm, the inner ring converts the position correction into a servo motor rotation angle instruction, and therefore precise control over the mold clamping force is achieved.
Owner:KRAUSSMAFFEI MACHINERY ZHEJIANG CO LTD

Atmosphere push plate furnace driving system based on servo motor frequency conversion control

The invention provides an atmosphere push plate furnace driving system based on servo motor frequency conversion control. The atmosphere push plate furnace driving system comprises a real-time detection module, a multi-mode control module, a strategy generation module and a system optimization and evaluation module. The method comprises the following steps: analyzing collected real-time data of different targets, identifying a current working condition stage of a system, switching to a corresponding control mode according to the identified working condition stage so as to generate a corresponding control strategy, dynamically adjusting the rotating speed and the torque of a motor according to the control strategy, and carrying out optimization test and evaluation on the system; a real-time load monitoring and feedback mechanism is adopted, a control algorithm and a rotating speed and torque adjusting strategy are applied, effective vibration suppression measures are combined, the dynamic response characteristics of the servo motor can be fully utilized, the rotating speed and torque of the servo motor can be adjusted in real time according to load changes, and start-stop impact and mechanical vibration of the atmosphere pusher furnace are remarkably reduced.
Owner:ZHAOQING HONGHUA ELECTRONIC TECH CO LTD

Network device, RIS device and communication method

The embodiment of the invention discloses a network device, an RIS device and a communication method, and the communication method is applied to the network device, and comprises the steps: transmitting first indication information to a reconfigurable intelligent surface RIS device through a first physical layer signaling; the first indication information comprises mode control information, and the mode control information is used for indicating that the operating working mode of the RIS equipment is switched from a current working mode to a target working mode; the current working mode is a reflection mode or a transmission mode; the target working mode is different from the current working mode.
Owner:LENOVO (BEIJING) LTD

Flying wing solar unmanned aerial vehicle based on distributed reversible power omnidirectional cooperative control

ActiveCN121044081ANacelleFlight vehicle
The invention discloses a flying wing solar unmanned aerial vehicle based on distributed reversible power omni-directional cooperative control, and relates to the technical field of aircraft design, the flying wing solar unmanned aerial vehicle comprises a cabin, flying wing platforms are symmetrically arranged on the two sides of the cabin, reversible power assemblies are arranged on the flying wing platforms, and each reversible power assembly comprises a supporting unit and a driving unit; a multi-mode flight control assembly is arranged in the cabin. According to the flying wing solar unmanned aerial vehicle based on distributed reversible power omni-directional cooperative control, in the air flight stage, based on the flexible characteristic of the flying wing platform, the driving units are vertically arranged in pairs, direct force is used for driving, the characteristic of multi-mode control is embodied, and the reversible power assembly is used for cooperatively achieving the omni-directional operation function; in the ground take-off and landing stage, based on the large deformation characteristic of the flying wing platform, the space distribution form of the driving units is adjusted in a reversing mode through the supporting units, every two driving units are horizontally arranged, control is achieved through wing deformation, and therefore the power units are prevented from colliding with the ground.
Owner:BEIHANG UNIV

Multi-position Controlled Airway Valve, Refilling Device and Refilling System

Disclosed in the present disclosure is a multi-position controlled airway valve, including a venting control member; a valve body, provided with a fluid channel and a venting channel, in which the venting control member is provided on the venting channel; a valve core assembly, mounted in the fluid channel, controlling the fluid channel to switch between a connected state and a sealed state, wherein the valve core assembly in a filling mode controls the fluid channel to be in the connected state and abuts against the venting control member so as to keep the venting channel to be in a ventilated state. Disclosed is also a refilling device applied with the multi-position controlled airway valve and a refilling system applied with the refilling device, so as to achieve the objective of removing air and residual gases promptly when refilling with new fuels.
Owner:CHANT HEAT ENERGY SCI & TECH (ZHONGSHAN) CO LTD

Self-adaptive start-stop control method, device and equipment along coal flow and storage medium

The invention relates to the technical field of open pit coal mine coal transmission control, and provides a coal flow-following self-adaptive start-stop control method, device and equipment and a storage medium, and the method comprises the following steps: obtaining operation parameters of a sealing-tape machine step by step from front to back according to a coal flow direction; according to the coal flow direction, based on the obtained operation parameters of the last-stage sealing-tape machine K, the starting time of the next-stage sealing-tape machine K + 1 is calculated, the starting time of all stages of sealing-tape machines is obtained in sequence, and then starting control over the sealing-tape machines is achieved; wherein when the sealing-tape machine abnormally runs due to coal blockage, the running mode of the sealing-tape machine is switched from coal flow running to reverse coal flow running, and coal flow self-adaptive start-stop control of the sealing-tape machine is completed. The coal flow starting mode is improved through data driving of state sensing, and the double-mode control strategy of clockwise starting and counterclockwise stopping and counterclockwise starting and clockwise stopping is fused, so that the system starting efficiency is improved, the energy consumption is reduced, the intelligent switching capability under the abnormal working condition is achieved, and efficient and safe operation of the coal mine transportation system is achieved.
Owner:XINJIANG TIANCHI ENERGY SOURCES CO LTD

Generated power control method, device and equipment of slope type gravity energy storage system, storage medium and program product

The invention relates to a generation power control method, device and equipment of a slope type gravity energy storage system, a storage medium and a program product, and relates to the technical field of gravity energy storage. By adopting the method, the generated power stability of the slope type gravity energy storage system can be improved. The method comprises the following steps: according to power generation request power and unit output power of the slope type gravity energy storage system, determining the current demand number of generator sets; the current generator set is a power generation device comprising two rails; selecting a target number of trucks to be in place on a high-altitude platform of the slope type gravity energy storage system according to the demand number of the current generator set; in response to a power generation starting signal of the slope type gravity energy storage system, according to the truck acceleration control principle, a variable parameter mode is adopted, and the truck is controlled to slide down at wrong time; responding to a power generation stop signal of the slope type gravity energy storage system, and when it is recognized that all the truck slides down and stops on the low-altitude platform of the slope type gravity energy storage system, power generation is ended.
Owner:NATIONAL INSTITUTE OF GUANGDONG ADVANCED ENERGY STORAGE CO LTD

Ultrasonic internal broaching test platform and ultrasonic vibration mode control method

The invention belongs to the technical field of machining, and particularly relates to an ultrasonic internal broaching test platform and an ultrasonic vibration mode control method.The test platform comprises a base, a broach and a clamping mechanism, and the clamping mechanism comprises a supporting ring and a clamping sleeve; a clamping groove is formed in the broach, and a protrusion matched with the clamping groove is arranged on the clamping sleeve. A plurality of supporting columns are arranged on the base, and the supporting columns are arranged in a circular shape. The broach is arranged in a space defined by the multiple supporting columns. And a piezoelectric actuator is arranged on the broach. Based on the platform, the invention provides the control method of the ultrasonic vibration mode, modal drift can be optimized and reduced by adjusting the pre-tightening force and the ultrasonic power supply driving frequency, the pre-tightening force is adopted to adjust and stabilize the contact rigidity, and the energy loss can be reduced; through frequency tracking, resonance points are matched in real time, and energy transfer can be maximized; the two modes are cooperatively controlled, response speed and stability are both considered, and the method adapts to high-dynamic loads.
Owner:CHANGSHA SISHENG INTELLIGENT EQUIP

High-precision temperature measurement system and temperature measurement device suitable for profound hypothermia

The invention discloses a high-precision temperature measurement system and device suitable for profound hypothermia. The high-precision temperature measurement system comprises an excitation module, an acquisition calibration module and a signal processing module. The excitation module is connected between the signal processing module and the acquisition calibration module, generates an excitation signal according to a control signal of the signal processing module, and transmits the excitation signal to the acquisition calibration module; the acquisition and calibration module comprises a temperature acquisition unit and a calibration unit, and the temperature acquisition unit is used for accessing an external temperature sensor and outputting a corresponding original electric signal; the calibration unit is connected to the excitation loop and outputs a standard calibration signal; the signal processing module receives the original electric signal or the standard calibration signal output by the acquisition calibration module, processes the original electric signal or the standard calibration signal, and outputs an excitation control signal to the excitation module to adjust parameters of the excitation signal; and meanwhile, a mode control signal is output to the acquisition and calibration module so as to switch the working mode of the temperature acquisition unit or the working mode of the calibration unit. According to the invention, the accurate measurement requirement of the profound hypothermia + / -0.001 K can be met.
Owner:SHENZHEN ZHONGKE QINGCHU TECH CO LTD +1

Rock shear-seepage coupling true triaxial test system

The invention discloses a rock shear seepage coupling true triaxial test system, which relates to the technical field of rock mechanical tests, and comprises a host, a sigma 1 / sigma 2 direction loading module, a sigma 3 direction confining pressure module, a pressure chamber auxiliary system, a sample clamp, a pore water seepage system, a temperature system, a control module and a data acquisition and processing module, through servo closed-loop linkage double-pump loading in the sigma 1 / sigma 2 direction, synchronous output of the double pumps and coordination of pressure supply of the two oil cylinders by the controller, a strain correction algorithm is combined, stability of a stress loading center is guaranteed, strain measurement accuracy is improved, confining pressure is accurately controlled in the sigma 3 direction through a double-balance pressure chamber and a pressure regulation algorithm, and the stress measurement accuracy is improved. The pressure chamber is in full-automatic operation, manual steps are omitted, errors are reduced, efficiency is improved, a stress-free blank angle clamp eliminates friction interference, a seepage system supports a double-loading mode, a control module achieves multi-control-mode impact-free switching, a data processing module is combined with an elastic modulus calculation algorithm, rock mechanical parameters are accurately obtained, and the multi-field coupling test requirement is met.
Owner:XIAMEN UNIV OF TECH

Intelligent cabin mechanical arm system

The invention relates to the technical field of automobile electronics and intelligent control, and discloses an intelligent cabin mechanical arm system which comprises a folding mechanical arm body, a tail end sensing interaction module, a driver state monitoring subsystem and a central control unit which are installed in a cabin. The central control unit controls the storage or working mode of the mechanical arm according to the comprehensive fatigue index of the driver; in the working mode, visual gazing information is used as a gating signal to activate electroencephalogram analysis, the operation intention is confirmed in combination with the visual prior probability and electroencephalogram signals, and the mechanical arm impedance parameters are adjusted in real time based on the fatigue state. According to the method, through Bayesian fusion of vision and electroencephalogram signals, the problem that single-mode control is unstable is solved; by means of variable impedance control and collision detection of the momentum observer, active safety protection based on the physiological state of the driver is achieved, and non-sensitive and high-safety intelligent auxiliary experience is provided in a limited cabin space.
Owner:BEIJING YINGZHI TECH CO LTD

Air conditioner and control method and device thereof, storage medium and computer program product

The invention provides an air conditioner, a control method and device of the air conditioner, a storage medium and a computer program product, and the method comprises the steps that when the air conditioner runs, audio data in the environment where the air conditioner is located are collected; according to the collected audio data, the contribution degree of the noise generated by the air conditioner to the total value of indoor human ear perceived environmental noise is determined; and if the contribution degree is larger than a preset value, a noise reduction mode is started, and noise reduction operation of the air conditioner is controlled. According to the scheme provided by the invention, the noise generated by the air conditioner can be distinguished from the environmental noise, and the noise reduction mode is accurately entered.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI

High speed TX topology with a common mode controlled serialization stage embedded in an output stage

A high-speed transmitter system using a common mode controlled serialization stage embedded in an output stage is disclosed. In some embodiments, the transmitter includes a serialization circuit that is configured to convert parallel data into serial data with one or more serialization stages; a logic circuit that is configured to connect each input of a last stage of the one or more serialization stages of the serialization circuit, via a respective logic function, to a respective dedicated output stage of an output circuit; and the output circuit that is configured to implement output stages to generate a signal based on the received input using NMOS transistors. In addition, the logic circuit is configured to be a desired voltage value (e.g., the output circuit's common mode) such that a switching point of the NMOS gm stage can be decreased and the gm stage can be activated within a reduced time.
Owner:RETYM INC

Data line system and data line for intelligently switching data transmission and charging

The invention relates to the technical field of data lines, and particularly discloses a data line system and a data line for intelligently switching data transmission and charging, and the system comprises a dual-core synchronization management module which is used for enabling dual cores to enter an initial detection state through encryption synchronization signaling when equipment is connected; the asynchronous signal processing module is used for generating state judgment parameters through multi-scale sliding window processing and time-frequency domain feature fusion; the consensus decision arbitration module outputs a backtracking trigger signal through dynamic projection transformation and self-adaptive threshold comparison; the state backtracking recovery module is used for generating a retry instruction with a random delay period based on the historical backtracking success rate and the signal quality evaluation; the safety mode control module is used for identifying dominant features by analyzing historical failure records and switching to a safety operation mode; through distributed dual-core cooperative processing and an intelligent fault recovery mechanism, the technical problems of confusion of protocol stacks and deadlock of a state machine in a complex electromagnetic environment are solved, and the anti-interference capability and reliability of the system are improved.
Owner:JINING AVOVE ELECTRONICS TECH CO LTD

Wind profile radar multi-mode detection system and detection method

The invention relates to the technical field of meteorological remote sensing detection, and discloses a wind profile radar multi-mode detection system and detection method. The wind profile radar multi-mode detection system comprises a mode control module which is used for storing a parameter library of low-mode detection parameters, medium-mode detection parameters and high-mode detection parameters, executing mode switching logic and generating control signals of pulse width and repetition period; the transmitting and receiving module is used for transmitting corresponding pulse signals according to the mode detection parameters, receiving echoes and realizing A / D conversion through high-speed acquisition; the data fusion module is used for carrying out time synchronization and overlapped region weighted fusion on the multi-mode detection data to generate continuous wind profile data; and the parameter optimization module is used for dynamically adjusting the detection parameters of each mode based on the real-time echo signal-to-noise ratio and the high resolution requirement. Through low, medium and high multi-mode cooperative detection, the contradiction between the height resolution and the detection height in single-mode detection is solved, and continuous high-precision detection of a full-height wind field from a boundary layer to a stratosphere is realized.
Owner:HUNAN STARLINK FUTURE INTELLIGENT TECHNOLOGY CO LTD

Mode switching method, device and equipment of energy storage converter and storage medium

The invention discloses a mode switching method, device and equipment of an energy storage converter and a storage medium, and relates to the technical field of power grid control, and the method comprises the steps: obtaining a multi-mode control grid-connected model of the energy storage converter, and the grid-connected model comprises a grid-following type control model and a grid-constructing type control model; based on the grid-connected model, injecting a high-frequency small signal into a power grid through an energy storage converter, and processing the high-frequency small signal by adopting a discrete Fourier transform algorithm to obtain grid-connected point voltage and current response; obtaining a power grid impedance parameter according to the grid-connected point voltage and current response; calculating an operation short-circuit ratio according to the power grid impedance parameter in combination with the actual output power of the energy storage converter and the power grid voltage amplitude; according to the operation short-circuit ratio and the short-circuit ratio threshold value, mode switching is carried out on the following network type control and the construction network type control, and the method can improve the accuracy of mode switching of the energy storage converter.
Owner:STATE GRID TIANJIN ELECTRIC POWER COMPANY +1

Power supply mode control method and control device for dual-source locomotive

The invention discloses a power supply mode control method and control device for a dual-source locomotive, and the power supply mode control method comprises the steps: controlling the locomotive to enter an automatic power supply mode, and then obtaining a front networking signal and an upper networking signal sent by an automatic driving system of the locomotive in real time; wherein the front network signal is used for describing whether a contact network exists at a first preset distance in front of the running of the locomotive, and the upper network signal is used for describing whether the contact network exists above the current position of the locomotive; if the front network signal is the high-level signal and the upper network signal is the high-level signal, controlling the locomotive to enter an automatic pantograph-catenary mode; if the front network signal is the low-level signal or the upper network signal is the low-level signal, the locomotive is controlled to enter an automatic battery mode. According to the invention, automatic switching between the pantograph-catenary mode and the battery mode is realized, the operation steps of workers are reduced, the probability of machine damage accidents during manual switching of the modes is effectively reduced, and meanwhile, the energy utilization rate is improved.
Owner:CRRC DALIAN CO LTD +1

Single-double-axle working mode control method and system for double-electric-drive-axle vehicle

The invention discloses a single-double-axle working mode control method and system for a double-electric-drive-axle vehicle, and belongs to the technical field of vehicle control. The method comprises the steps that a double-axle working mode is adopted for starting to drive the double-electric-drive-axle vehicle to conduct double-axle work; the current gear state, the current vehicle speed, the whole vehicle demand torque, the motor temperature and the electric drive axle fault state of the double-electric-drive-axle vehicle are obtained; according to the current gear state, the current vehicle speed, the whole vehicle demand torque, the motor temperature and the electric drive axle fault state, whether the double-electric-drive-axle vehicle switches a single-axle working mode or not is controlled; if the double-electric-drive-axle vehicle enters the single-axle working mode, a working axle of the single-axle working mode of the double-electric-drive-axle vehicle is selected according to the electric-drive-axle fault state and the motor temperature, the working axle is used for driving the double-electric-drive-axle vehicle to conduct single-axle working, and the single-axle working mode of the double-electric-drive-axle vehicle is obtained according to the obtained accumulated mileage. And controlling whether to switch the working bridge or not in the single-bridge working mode of the double-electric-drive-bridge vehicle. The service life of the gear shifting mechanism can be prolonged, and the reliability of a vehicle is improved.
Owner:XUZHOU XUGONG NEW ENERGY VEHICLE CO LTD

Memory and operating method thereof

The invention relates to the technical field of semiconductors, and provides a memory and an operation method thereof, which are used for relieving harm caused by line hammering. The memory comprises a memory array and a control circuit. The control circuit is configured to enter a first mode in response to a command address signal and a mode control signal when a preset condition is met, execute an updating operation on a counting storage unit corresponding to an activated word line at a first moment, execute a pre-charging operation on the activated word line at a second moment, and take counting data as a counting value of row hammer refreshing; or, responding to the command address signal and the mode control signal when the preset condition is not met, entering a second mode, not executing the updating operation on the counting storage unit corresponding to the activated word line, and starting to execute the pre-charging operation on the activated word line at a second moment, and taking an activation count value of an activation word line in the dynamic lookup table as a count value of row hammer refreshing. In this way, balance is achieved between flexible configuration and reliability guarantee, and harm caused by hammering is relieved.
Owner:RUILI INTEGRATED CIRCUIT CO LTD

Method for automatically controlling height of molten pool in double-roller thin-strip continuous casting production process

The invention relates to the technical field of thin-strip continuous casting production, in particular to a method for automatically controlling the height of a molten pool in the double-roller thin-strip continuous casting production process, which comprises the following steps: arranging a laser ranging module and a visual perception module; processing by an embedded processing module; establishing a molten pool height dynamic prediction model by adopting a deep learning algorithm, and outputting a molten pool height prediction value; self-adaptive sliding mode control is adopted as a main controller, and the displacement amount of the servo hydraulic stopper rod is output; and controlling the height of the molten pool based on the displacement of the servo hydraulic stopper rod. According to the method, laser is used for providing accurate distance reference, visual sensing is used for providing molten pool liquid level information, and the detection precision is improved and environmental interference is reduced through a machine vision algorithm; based on the process parameters and the real-time information of the sensor, constructing a molten pool height prediction model by using a neural network algorithm with physical constraints; and a reinforcement learning optimizer is added to adjust sliding-mode control parameters online, so that the sliding-mode control parameters adapt to working condition changes to carry out high-precision and fast-reaction molten pool height control.
Owner:CENT SOUTH UNIV

Control system of standing plate type pallet truck and control method thereof

The invention relates to the technical field of forklift control, and discloses a control system and a control method of a standing plate type pallet truck. A pressure state signal of a hydraulic oil way is obtained through a pressure switch, a load state is judged, and a power mode is selected through a mode selection switch; and the controller controls the forklift to run according to the set acceleration running curve or brake according to the braking running curve according to different vehicle running states. The pressure switch is used for recognizing the light-load and heavy-load working conditions of the vehicle, the maximum speed of the light load of the vehicle is increased according to different load conditions and different power modes, the braking distance of the vehicle under different loads and the running stability of the vehicle are ensured, and the service life of the vehicle is prolonged. Therefore, the working efficiency of the vehicle is improved, the purposes of smooth driving and safe and smooth braking of the vehicle are achieved, and various control requirements of a user on high efficiency, safety, comfort and the like of the vehicle under different working conditions are met.
Owner:ANHUI HELI CO LTD