24results about How to "Good dynamic response" patented technology

The application discloses a data-driven optimal control method for a grid-connected inverter. The method comprises the following steps: constructing a DeePC optimization controller of the grid-connected inverter on the grid side; acquiring a data matrix of the grid-connected inverter in a preset historical period and an initial trajectory after a preset adjacent period, inputting the controller, setting parameters for different control targets and types of the grid-connected inverter, outputting an optimal input data sequence after processing, generating a sinusoidal pulse width modulation wave signal and acting on the grid-connected inverter, and realizing data-driven optimal control. The method can automatically perceive and adapt to the dynamic characteristics of the actual power grid through real-time data-driven predictive control, can present or enhance the control behavior of the grid-constructing or grid-following inverter by modifying the cost parameters, can realize multi-mode flexible, optimal and coordinated control, has excellent dynamic response and steady-state performance, is beneficial to safe and stable operation, and improves the ability to adapt to complex and variable operating conditions and power grid strength.

This invention relates to the technical field of energy storage control in transportation, and provides a method and system for energy storage control in transportation. The method includes: acquiring real-time status information of an electric vehicle; when the real-time status information indicates a low-load operating state or a charging state, applying a current pulse to the battery cell and measuring the voltage response; calculating the internal resistance and available power based on the voltage response and storing it as a performance record; acquiring future operating plans and analyzing the charge and discharge load of the battery cell in future operating cycles based on the future operating plans; obtaining risk analysis results based on the performance record and charge and discharge load; setting personalized balancing targets for the battery cell based on the risk analysis results; and pre-allocating energy to the battery cell according to the personalized balancing targets when the real-time status information indicates a low-load operating state or a charging state. This invention improves the overall performance of energy storage control in transportation.

The invention relates to the field of ship energy control, in particular to an electric ship energy control method based on working condition recognition. The method comprises the following steps: acquiring planned route information, and analyzing historical working conditions of route segments one by one to obtain historical working condition characteristics; real-time working condition parameters in the ship navigation process are collected; positioning and matching a plurality of sub-legs according to the real-time working condition parameters, and constructing a sub-leg working condition feature set; working condition deviation comparison is carried out on the historical working condition features according to the sub-leg working condition feature set, and a deviation state sequence is determined; performing propulsion power gap calculation based on the deviation state sequence to obtain a power gap compensation value; battery capacity information is identified, current endurance state evaluation is carried out, and an endurance evaluation value is obtained; and carrying out endurance constraint correction on the power gap compensation value according to the endurance evaluation value to obtain a power constraint adjustment value. According to the invention, through real-time working condition identification and analysis, energy efficiency optimization, endurance safety and operation reliability are considered under complex navigation working conditions.

This application relates to the field of microgrid technology, and in particular to a current harmonic suppression method, an inverter, and a storage medium. The method includes: establishing the state equation of the grid-connected inverter based on the grid-connected inverter circuit and Kirchhoff's laws; establishing a transfer function from the disturbance voltage to the harmonic components of the grid-connected current based on the state equation; determining a calculation model for the modulation wave compensation term used to suppress the disturbance voltage based on the transfer function; extracting the harmonic components in the grid-connected current in real time, and obtaining the modulation wave compensation signal based on the calculation model of the harmonic components and the modulation wave compensation term; and superimposing the original modulation wave signal output by the current loop controller and the modulation wave compensation signal to obtain the final modulation wave signal. The method of this application can actively and accurately compensate for periodic voltage disturbances introduced by the switching of the power frequency bridge arm, thereby effectively suppressing the resulting current harmonics and zero-crossing distortion, and significantly reducing the THD of the grid-connected current.

This invention relates to the field of data visualization and integration technology, specifically to a method and system for visually evaluating rehabilitation services. The method includes the following steps: acquiring and standardizing multi-dimensional indicator data; establishing a normalized matrix mapping parameter; and generating a set of visual evaluation charts for rehabilitation services. In this invention, by constructing a unified numbering set covering multi-dimensional indicators, effective organization and standardized management of data sources are achieved. Data fusion compatibility and accuracy are improved through field similarity comparison and unit conversion. Normalization calculations and grade grouping operations for values ​​such as service usage, resource allocation, job distribution, and fiscal expenditure ensure that various indicators are compared under a unified standard. Visual mapping of core parameters such as resource ratio, efficiency ratio, and coverage ratio is used. Interactive components and layer switching enhance the dynamic response and multi-view switching capabilities of the graphical interface, solving the problems of insufficient structure, single result presentation format, and lack of real-time performance in traditional evaluations.

This invention discloses a power regulation and coordinated control method for a heat pipe reactor-supercritical carbon dioxide nuclear power plant, comprising: determining that if the percentage deviation between the actual output power and the expected output power of the turbine compressor unit is less than a preset proportional value or proportional range and greater than zero, then using the working fluid flow control process of the turbine compressor unit as the primary regulation mode and the power control process of the heat pipe reactor as the secondary regulation mode; determining that the percentage deviation between the actual output power and the expected output power of the turbine compressor unit is greater than a preset proportional value or proportional range, then using the power control process of the heat pipe reactor as the primary regulation mode and the working fluid flow control process of the turbine compressor unit as the secondary regulation mode. This multi-objective control mode, which integrates primary and secondary controllers in a coordinated manner, helps ensure that the turbine compressor unit has a fast power response to external forces, while improving the energy conversion efficiency of the heat pipe reactor-supercritical carbon dioxide nuclear power plant, thus balancing the energy conversion efficiency and rapid mobility of the nuclear power plant.

The application relates to a hybrid brake coordination control method, device, equipment and medium of an unmanned vehicle. The method comprises the following steps: acquiring a desired deceleration of the vehicle, determining a maximum effective electric brake deceleration at a current vehicle speed; when an electric brake safety intervention condition is met, selecting a pure electric brake mode or a hybrid brake mode according to a comparison result of the desired deceleration and the maximum effective electric brake deceleration; when the hybrid brake mode is adopted and the vehicle speed is reduced to below an electric brake enabling speed threshold, performing hybrid brake exit control, and judging an exit opportunity based on a duration, an actual deceleration deviation and a hydraulic brake theoretical deceleration deviation. The method can improve the dynamic response, energy recovery rate, brake safety and reliability of the hybrid brake control.

The embodiment of the invention provides a suspension system and a vehicle. The suspension system comprises a base, a linear motor, an elastic piece and a magnetorheological damper, the base comprises a support and a lower supporting seat, one of the support and the lower supporting seat is suitable for being connected with a vehicle body, and the other one of the support and the lower supporting seat is suitable for being connected with a wheel; the linear motor comprises a stator and a rotor, one end of the rotor is connected to the support, and the end, away from the support, of the stator is connected to the lower supporting base. The elastic piece is arranged between the support and the stator and provides elastic force between the support and the stator; the magneto-rheological damper comprises an outer cylinder and a damper piston which is arranged in the outer cylinder and can move linearly relative to the outer cylinder, the magneto-rheological damper is arranged in the rotor, the outer cylinder is connected to the rotor, and the damper piston is suitable for being connected to the lower supporting base. According to the scheme, the energy consumption of the suspension system is reduced, the performance is improved, the safety redundancy is improved, and the cost is reduced.

The utility model discloses a three-way static and dynamic force simulation loading device of a horizontal machining center, which belongs to the technical field of machine tool performance testing, and comprises a cutter handle interface module, a connecting platform and three branch chains, the three branch chains are arranged at equal intervals in the circumferential direction of the connecting platform, and a mounting plate is connected between the three branch chains and the connecting platform. The three branch chains are of the same structure, each branch chain comprises a servo electric cylinder, a two-degree-of-freedom hinge, a first base and a second base, the end, close to the servo electric cylinder, of the two-degree-of-freedom hinge is rotationally connected with the first base, and the end, away from the servo electric cylinder, of the two-degree-of-freedom hinge is rotationally connected with the second base. According to the utility model, simulation loading of three-way force under the service condition of the horizontal machining center main shaft can be realized.

The invention relates to a large-skewness, large-retreat-amount and high-bearing double-slit flap mechanism and an aircraft. The double-slit flap mechanism comprises a driving mechanism, a sub-flap and a main flap. The driving mechanism comprises a rack, a linear driving part, a first rocker arm, a second rocker arm, a first connecting rod, a second connecting rod and a third connecting rod; the rack is arranged on the outer side wall of the duct, the lower end of the first rocker arm is hinged to the rack, and the upper end of the first rocker arm is fixedly connected with the sub-flap; one end of the second connecting rod can slide relative to the rack, the middle of the second connecting rod is hinged to the middle of the first rocker arm, the other end of the second connecting rod is hinged to one end of the third connecting rod, and the other end of the third connecting rod is hinged to the first connecting rod. The double-slit flap mechanism can meet the requirements for large retreating amount, large deflection angle and high aerodynamic load bearing, and the aerodynamic lift augmentation effect of an aircraft in the vertical take-off and landing stage is improved.

The invention relates to a reference electrode, a lithium ion battery and a potential measurement method thereof, the reference electrode comprises a current collector layer and coating layers covering two sides of the current collector layer, and the coating layers are lithium foils; the current collector layer comprises a lithium storage region (1) and a measurement region (2) extending outwards from the lithium storage region (1); a lithium storage tab (4) is arranged on the lithium storage area (1), and a measuring tab (5) is arranged on the measuring area (2) deviating from the lithium storage area (1). Compared with the prior art, two sets of independent references are not used for calibration conversion, the same lithium foil is integrally formed and is divided into a lithium storage end and a measurement end, the lithium storage end and the measurement end are electrically communicated to form a single Li metal reference system, and the measurement end is directly placed in an ion channel between a positive electrode and a negative electrode to improve the authenticity and dynamic response of potential sampling. And the lithium storage end provides sufficient lithium source to maintain the interface stability and long service life of the measuring end.

This invention discloses a deep learning-based method for self-tuning controller parameters in a motor servo system. The method includes: constructing a hybrid model combining a mechanistic model and feedforward neural network residual compensation; performing multi-objective optimization based on this model to obtain a set of initial offline controller parameter values; and constructing a parameter adjustment model based on a Long Short-Term Memory (LSTM) network during online operation. This model takes the system state sequence as input and outputs the percentage change in parameter offset relative to the offline initial values, achieving online, constrained, and small-range dynamic tuning of the controller parameters. This invention improves the reliability of performance prediction through the hybrid model and ensures engineering safety through a constrained online adjustment mechanism, thereby significantly improving the tracking accuracy, stability, and adaptability of the servo system under complex and variable operating conditions.

The present application relates to a distributed photovoltaic MPPT method, system, device and medium, and relates to the technical field of distributed photovoltaic power generation, which comprises the following steps: preprocessing photovoltaic array data, obtaining irradiance, temperature and MPP voltage dataset; determining the optimal ElmanNN hidden layer node number by K-fold cross-validation and RMSE evaluation, and dividing the dataset into a training set, a validation set and a test set; inputting the training set into global search of the firefly algorithm and local optimization of the ant colony optimization algorithm, defining the stable solution as the FA-EAS optimal parameters after convergence; updating the ElmanNN weight threshold based on the optimal parameters, deploying the training model to perform MPP voltage online prediction; inputting the difference between the predicted voltage and the reference voltage into a PID controller, calculating the control amount through the incremental PID, generating a PWM signal to control the duty cycle of the Boost converter, and realizing maximum power point tracking. The present application can improve the tracking speed, stability and success rate of MPPT.

The invention belongs to the technical field of combine harvesters, and discloses an independent header adaptive profiling control system based on multi-sensor fusion, which comprises a sensing module, an execution module and a control module, and is characterized in that the sensing module and the execution module are electrically connected with the control module; the sensing module comprises high-precision angle sensors installed on the left side and the right side of the header, and each high-precision angle sensor is hinged to the header through a mechanical rotating arm and a tension spring assembly and used for converting the vertical displacement and the inclination angle of the header relative to the ground into electric signals. Through deep cooperation of sensing, execution and control technologies, the crop loss rate is reduced by 30%-50%, the impurity rate is remarkably reduced, the method is particularly suitable for low-stubble harvesting operation of soybeans, oilseed rapes and the like, the operation quality and economic benefits of a combine harvester are greatly improved, and agricultural machinery equipment is promoted to be upgraded to high-end intelligence.

The invention discloses an instantaneous power control method for a permanent magnet synchronous generator without a position sensor. A direct current power supply system comprises a permanent magnet synchronous motor, a power electronic converter and a control framework. The permanent magnet synchronous motor works in a power generation state, the rotor is driven to rotate through the engine or the transmission device connected to the engine, the stator winding cuts a magnetic field generated by the rotor permanent magnet, and then alternating electromotive force is induced in the stator winding. The control architecture controls the power electronic converter to work in a rectification state and provides stable voltage output for the load. According to the control method provided by the invention, the sliding-mode observer, the phase-locked loop and instantaneous power control are combined, and non-inductive observation of the rotor position and decoupling control of active power and reactive power are realized. Moreover, the size of the permanent magnet synchronous generator is reduced, the problem of signal failure easily occurring under the severe working conditions of vibration, high temperature and the like is effectively avoided, and the reliability of long-term operation of the system is improved.

The application is based on a high dynamic humanoid dexterous hand with rigid-flexible hybrid transmission, comprising a bionic single finger module for grabbing objects; a wrist joint module, a plurality of bionic single finger modules being fixed on the wrist joint module; an arm driving module for providing driving force for the bionic single finger module and the wrist joint module; further comprising a rigid rotation and linear transmission assembly arranged in the wrist joint module and the arm driving module, the rigid rotation and linear transmission assembly being used for local power transmission for the deflection movement of the finger root in the bionic single finger module and the multi-degree-of-freedom movement of the wrist joint module, the rigid rotation and linear transmission assembly comprising a rotation transmission part and a linear transmission part connected in sequence. The application has low terminal inertia, good dynamic response, realizes system-level cross-joint motion decoupling, provides high transmission stiffness and precision through rigid-flexible hybrid, has extreme space utilization, high modularization of structure, perfect external protection and bionic flexible contact and other technical effects.

The invention provides a medical pressure-limiting valve for an infusion pipeline, comprising: a housing, a liquid inlet for connecting a liquid inlet pipeline, and a liquid outlet for connecting a liquid outlet pipeline; the diaphragm is arranged in the inner cavity and divides the inner cavity into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet cavity is communicated with the liquid inlet to form a liquid inlet channel, and the liquid outlet cavity is communicated with the liquid outlet to form a liquid outlet channel; the diaphragm is provided with at least one diaphragm hole which is used for communicating the liquid inlet cavity with the liquid outlet cavity; the plug is arranged in the inner cavity and is connected with the diaphragm; the pressure limiting valve has a conducting state and a blocking state; in the blocked state, the difference between the pressure of the liquid inlet channel and the pressure of the liquid outlet channel is larger than or equal to a set value, and the liquid outlet is blocked by the plug so that the liquid inlet channel and the liquid outlet channel can not communicate. In the conducting state, the difference between the pressure of the liquid inlet channel and the pressure of the liquid outlet channel is smaller than a set value, and a gap is formed between the plug and the liquid outlet so that the liquid inlet channel can be communicated with the liquid outlet channel. The medical pressure limiting valve for the infusion pipeline is simple in structure, rapid in response and reliable in sealing.

This invention discloses a multi-loop control method, frequency converter, control system, equipment, and medium for an electric spindle. The method includes: a position loop module outputting a speed command signal based on a command position signal and a position signal fed back from the motor encoder; a speed loop module outputting a first-axis command current signal based on the speed command signal and an actual speed signal generated by differential calculation of the position signal; and a field weakening controller module outputting a first-axis current signal and a second-axis current signal based on the first-axis command current signal, the actual speed signal, and a temperature characterization signal representing the motor winding temperature. This invention discloses a multi-loop control method, frequency converter, control system, equipment, and medium for an electric spindle, applicable to the position-speed-current three-loop control architecture of an electric spindle frequency converter, improving dynamic response and disturbance rejection capability. It dynamically calculates the field weakening switching point based on real-time voltage, current, temperature, and load status, achieving smooth switching and optimal voltage utilization.

The application relates to the technical field of electric vehicle control, in particular to an electric vehicle driving motor controller, which comprises a power inverter, a sensing assembly and a control assembly; the power inverter is installed on a control mainboard; the sensing assembly is used for collecting motor operation states; the control assembly comprises a main control module, a transmission chain control module and an inverter control module; the transmission chain control module accurately measures a gear gap through a position sensor and generates a bidirectional torque pulse, so that the motor is guided to realize smooth meshing and eliminate mechanical impact; the inverter control module corrects electrical nonlinearities caused by dead zones and voltage drops through a current sensor, thereby ensuring the accuracy of basic torque output; the problems that torque is misaligned due to the electrical nonlinearities of the controller and the mechanical nonlinearities of the transmission chain during the process that the controller drives the motor, and the problems that driving smoothness and the service life of components are reduced are solved.

The present application relates to the technical field of smart grid, especially to a power grid base digital employee intelligent construction and multi-scene adaptation method, which analyzes the process nodes and data flow paths of the whole business of the power grid base, and constructs a business flow knowledge link; determines multiple typical business scenarios, combines the scenarios and the knowledge link to predict demand pain points, and establishes a multi-scene demand pain point distribution dynamic knowledge graph; defines the compliance constraint space of each business node, obtains the existing digital employee ability configuration network, fuses the knowledge graph and the constraint space to identify the ability gap, and accurately locates the gap module and degree; based on the gap degree, the ability module is adapted and optimized to generate the construction optimization result, realizing the closed-loop management from business modeling, pain point prediction to gap identification and optimization, effectively solving the problems of poor scene adaptability of traditional digital employees, insufficient compliance risk identification and incomplete ability coverage, and significantly improving the intelligent level and multi-scene adaptation efficiency of the power grid base service.

This utility model belongs to the field of new energy vehicle power transmission technology, and discloses a single-motor two-speed electric drive axle powertrain, including a disc motor, a reducer housing, a first shaft assembly, an intermediate shaft assembly, a reducer end cover, an axle housing, a first half-shaft, a differential, a second-stage reduction passive gear, a second half-shaft, a coupling sleeve, and a differential lock assembly. This solution achieves the advantages of compact structure, short axial dimension, and high power density by adopting an integrated design of an axial flux disc motor and a two-speed reduction mechanism, which is convenient for application in vehicles with high ground clearance requirements and limited installation space. By using a ball screw type shifting actuator in conjunction with motor speed adjustment, synchronizer-free rapid shifting is achieved, improving shifting smoothness and system reliability. The hollow intermediate shaft assembly and lubrication oil passage design make lubrication efficient and the structure simplified, improving operational reliability. The rear-mounted integrated differential lock assembly enhances the ability to get out of trouble in complex road conditions and the vehicle's adaptability.

The application provides a kind of weak magnetic control method based on permanent magnet synchronous motor adaptive parameter identification, it is related to motor control technical field, the method is by fusing the improved particle swarm optimization algorithm (CIPSO) of chaos inertia weight and Gaussian disturbance online identification stator resistance, cross-axis inductance and permanent magnet flux linkage, solve the problem of control performance decline caused by parameter time-varying;Below rated speed, maximum torque current ratio (MTPA) control based on real-time parameters is used, the convex pole effect is used to reduce the amplitude of stator current, improve the efficiency and dynamic response of low speed operation;Above rated speed, the voltage saturation criterion triggers the lead angle weak magnetic control, dynamically introduces the phase of lead angle correction current vector, makes the operating point move along the voltage limit ellipse boundary, breaks through the voltage constraint of inverter, while combining the parameter identification result carries out feedforward decoupling compensation, realizes the smooth switching from MTPA to weak magnetic and high speed area stable operation.

This invention discloses a method and system for motor parameter identification based on a multiple synchronous rotating coordinate transformation filter. The method includes: using the motor's voltage and current along the αβ axis, along with position estimation information from a quadrature phase-locked loop (PLL), as inputs to a sliding mode observer to obtain back electromotive force (EMF) observations. The sliding mode algorithm employs a switching function to suppress high-frequency chattering in the back EMF. Furthermore, the harmonic disturbances in the back EMF are filtered out using a multiple synchronous rotating coordinate transformation filter. The fundamental component of the back EMF is then passed through the PLL to obtain the rotor's estimated speed and position information. The proposed multiple synchronous rotating coordinate transformation filter can be applied to sensorless motor control systems, eliminating the fifth and seventh harmonics in the estimated back EMF and exhibiting excellent harmonic suppression. This enables real-time and accurate acquisition of motor position information, improving the control performance of the motor drive system.

The invention discloses a PWM variable spraying system and a control method thereof. The PWM variable spraying system comprises a pesticide box, a variable spray head assembly, a PWM variable spraying control system, an intelligent center control platform, a spraying main pipeline, at least one spraying branch pipeline, a backflow pipeline, a pesticide liquid pump, a control valve set, a collection assembly and a pressure stabilizing filtering assembly. And the control valve group comprises a main switch valve, a main pipeline switch valve, a branch switch valve and a proportional overflow valve. According to the method, a three-layer measurement and control structure of'spray opening and closing circulation-pressure regulation and control circulation-flow regulation and control circulation 'is constructed, the coupling effect of'pressure change caused by flow regulation and flow change caused by pressure regulation' is reduced, long-period and short-period cooperative scheduling is adopted, and the recovery speed and the control stability under the state transition working condition are improved. And total spraying flow feedback is introduced to construct flow closed-loop correction, so that the spraying quantity control precision and robustness are improved.