59results about How to "Solve instability" patented technology

The invention belongs to the technical field of visual training, and particularly relates to a multi-dimensional visual training feedback method for improving binocular fusion visual and stereoscopic visual functions, and the method comprises the following steps: carrying out medical baseline detection, generating an initial ability portrait through visual function evaluation and cognitive ability testing, matching training difficulty parameters, and generating a personalized scheme; multi-modal game training is carried out, training types comprise gamification training, animation scene training and offline family task training, and the training difficulty is dynamically adjusted; a tutor performs remote one-to-one guidance, and dynamically adjusts a training scheme according to a change report by tracking the training progress in real time; and the system performs multi-dimensional effect evaluation and self-optimizes a difficulty prediction algorithm. According to the method, the problems of dull training and passive participation, scheme stiffness and execution deviation, single stimulation and cognitive load, scene limitation and continuous interruption are solved.

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.

A method and system for identifying wireless communication devices based on radio frequency fingerprinting is disclosed. The receiver extracts radio frequency fingerprint features from the wireless signals transmitted by the wireless communication device to identify its identity. The method includes: Step 1. Pre-training a feature extraction network and a classification head using known device label data; Step 2. Jointly estimating the number of known and unknown device categories in the mixed signal through feature space stripping and effective rank estimation; Step 3. An adaptation phase, freezing the anchor points of the known class classification head and constraining the anchor points of the unknown class to actively guide isolation; Step 4. Obtaining pseudo-labels by performing semantic geometric registration on unlabeled samples based on balanced entropy regularized optimal transmission; Step 5. Adaptively training the feature extraction network based on progressive manifold anchoring and reliable pseudo-replay; Step 6. Outputting the identity of the device to be identified using the trained feature extraction network and a unified classifier. This invention solves the stability-plasticity dilemma of known class forgetting and unknown class confusion, achieving accurate device identification and number estimation in dynamic environments.

The utility model belongs to the technical field of faucets, and particularly relates to a faucet capable of discharging water stably, a partition plate is arranged in a faucet body and divides the interior of the faucet body into a first water outlet channel and a second water outlet channel, and a through hole communicated with the first water outlet channel and the second water outlet channel is formed in the partition plate. A connecting hole is formed in the top of the faucet body, a locking hole communicated with the first water outlet channel is formed in the bottom of the faucet body, a first water outlet communicated with the second water outlet channel is formed in the bottom of the faucet body, the through hole, the connecting hole and the locking hole are arranged on the same axis from top to bottom, and an adjusting assembly is arranged on the connecting hole. The adjusting assembly can select different water outlet channels to adjust water outlet according to actual requirements, adjustment is easy, convenient and labor-saving, the problem of unstable water flow caused by factors such as water pressure fluctuation is effectively solved, and stable water outlet is achieved.

The application discloses a robot fine operation control method based on contact state uncertainty, comprising the following steps: acquiring contact information between a robot end effector and an environment, and constructing a contact feature vector; obtaining the probability distribution of each state in the contact state set by using a contact state recognition model, calculating the contact state uncertainty, and then obtaining the normalized uncertainty; constructing an adaptive strategy generation function to generate a control strategy; dynamically adjusting the control parameters of the robot based on the control strategy, and realizing compliant control execution through a compliant control model; in the process of compliant control execution, a sliding error is constructed based on the robot end position error, and an adaptive update law of the control parameters is designed based on the Lyapunov method to adjust the stiffness and damping parameters online. The application can improve the operation success rate and system stability of the robot under different contact states.

The application discloses a kind of air-cooled radiator fan rotating speed control method and system, it is related to fan control technical field, its method includes: the vibration acceleration data on the controller circuit board of multiple fan array is collected;Fan system is currently based on the vibration acceleration data evaluation vibration state;Based on the vibration state adjustment multiple fan array Synchronization error allowable range;Real-time rotating speed information of each fan in the multiple fan array is obtained;Based on the synchronization error allowable range and the real-time rotating speed information of each fan Signal correction instruction is generated;Based on the signal correction instruction, the rotating speed of each fan in multiple fan array is adjusted, and the embodiment of the application has the advantages that the synchronization error allowable range is adjusted dynamically, effectively cope with the rotating speed synchronization control challenge of fan system under different vibration states, avoid the instability of control system and the disadvantage of hardware degradation caused by mechanical resonance.

The utility model relates to the technical field of robot walking platforms, and discloses a linear walking platform of a robot, which comprises a plurality of universal wheels, the upper ends of the plurality of universal wheels are fixedly connected with a lower box body, the four corners of the upper end in the lower box body are fixedly connected with a plurality of air cylinders, and the air cylinders are fixedly connected with the lower box body. Multiple second bearings are fixedly connected to the output ends of the multiple air cylinders, multiple load bearing plates are fixedly connected to the outer rings of the second bearings, multiple first sliding holes are formed in the bottom end of the lower box body, multiple side sliding plates are fixedly connected to the two sides of the upper end of the lower box body, multiple cross-shaped sliding grooves are formed in the middles of the side sliding plates, and multiple second sliding holes are formed in the middle of the cross-shaped sliding grooves. A plurality of moving mechanisms are slidably connected to the inner walls of the cross-shaped sliding grooves. According to the utility model, the moving mechanism can enable the robot to stably run in a straight line, and the cylinder, the load bearing plate, the universal wheels and the second bearing can ensure the stability of the platform during movement and use.

The application discloses a weather radar wind turbine clutter recognition method and system based on fuzzy reasoning, and belongs to the technical field of fuzzy reasoning. The monitoring area of a target weather radar is divided into multiple echo observation subunits according to distance gates and scanning azimuth angles, and the reflectivity factor, radial velocity, spectral width and differential reflectivity of each echo observation subunit are continuously acquired within a preset data acquisition time sequence. By analyzing the discrete characteristics of the reflectivity factor and the radial velocity in the time sequence, echo stability characteristic quantities are constructed, echo shape consistency characteristic quantities are constructed based on the consistency deviation of the spectral width and the differential reflectivity in the neighborhood, the echo stability characteristic quantities and the echo shape consistency characteristic quantities are subjected to fuzzy mapping, and the wind turbine clutter and meteorological echoes are distinguished and recognized through a fuzzy comprehensive judgment quantity, so that the accuracy and robustness of the wind turbine clutter recognition are improved, and the weather radar data quality control under complex background conditions is suitable.

This invention proposes a construction method for restoring the locking temperature during flash welding repair of damaged rails on existing railway lines, belonging to the field of railway rail maintenance. The method includes: determining the rail temperature and the length of the rail construction section; calculating the allowable stretching amount of the rail based on the rail temperature and the length of the rail construction section; performing over-stretching of the rail based on the allowable stretching amount; sawing the damaged rail, inserting a new rail, and performing flash welding; and restoring the straightness of the rail construction line. This invention's method for restoring the locking temperature during flash welding repair of damaged rails on existing railway lines ensures a uniform and consistent track locking temperature, effectively guaranteeing the control and uniformity of the rail temperature. It solves the problem of track instability caused by the inconsistency between the construction temperature and the track locking temperature during the replacement of damaged rail components, which leads to the breakdown of the track's resistance to rail expansion and directly affects the stability of the line and traffic safety.

This invention relates to an MPL composite adjuvant and its preparation method, belonging to the field of vaccine adjuvant technology. The composite adjuvant comprises neutral phospholipids, anionic phospholipids, cholesterol, monophospholipid A, QS-21, and surface-modified lipids. The preparation method includes: dissolving the lipid components in an organic solvent to form a mixed solution, evaporating the solvent to form a lipid film, adding buffer solution for hydration to form a liposome suspension, sonicating to obtain small monolayer liposomes, and then mixing with a QS-21 micelle solution. This invention significantly improves the stability of the adjuvant by introducing surface-modified lipids, exhibiting small particle size, uniform distribution, high negative zeta potential, good stability in serum environments, and the ability to induce high-level antibody immune responses, making it suitable for vaccine development.

The application provides a kind of based on visual detection's sports glasses dimming film evaluation method and system, it is related to sports glasses manufacturing technical field, its technical solution main point is: by obtaining positioning map, determine clamping offset and correct, convert image to uniform lens coordinate, compare the candidate abnormal area in different images and determine its stability, finally mark effective feature and determine evaluation result, effectively solve the problem that visual information is unstable in prior art due to clamping deviation and observation condition change, ensure the objectivity and accuracy of evaluation result, have by clamping offset correction and image coordinate uniform, effectively eliminate the visual information fluctuation caused by clamping deviation and observation angle change, ensure that visual information accurately reflects the real state of film, thereby improve the objectivity and accuracy of evaluation result.

The invention provides a building energy consumption analysis method and system based on an MCP service model and an intelligent agent, and relates to the technical field of building energy saving and artificial intelligence, and the method comprises the steps: constructing and packaging an MCP service model, and abstracting the MCP service model into a standardized function interface after packaging; acquiring and storing operation equipment and equipment operation parameters in the building; an input request of a user is obtained, a task intention in the input request is recognized, the task intention is converted into specific API calling according to the task intention, and the API obtains structured energy consumption data by calling an MCP function interface; combining the structured energy consumption data returned by the MCP with the cue word template, transmitting the combined Agents to the large language model, and outputting to obtain a report; and visualizing or exporting the report. According to the invention, full-automatic generation from complex building energy consumption data to a structured report containing natural language analysis and visual charts is realized.

The utility model provides a PU (Poly Urethane) foaming wheel puncture experiment device, which relates to the field of PU foaming wheel performance and comprises a supporting mechanism, and a guide rail mechanism is fixedly connected to the top end surface of the supporting mechanism. According to the existing puncture test device, when a puncture tool is manually held by hand for puncturing, the efficiency is low, the puncture part of a foaming wheel is easily torn due to the fact that the puncture tool needs to be manually pulled out after puncturing is completed, and the test result is influenced. The vertical movement of the puncture assembly is controlled by the servo push rod, automation of the puncture process is achieved, compared with a traditional mode of manually holding a puncture tool, the structure improves the puncture efficiency, damage to the foaming wheel caused by manual pulling and inserting is avoided through the automatic reset function of the servo push rod, and the reliability of an experimental result is ensured.

The invention discloses a power interface converter stability control method for a power-steam cogeneration system, and the method comprises the following steps: collecting a hydrogen energy storage state, a cogeneration unit operation state and an electric quantity, and constructing a comprehensive feasible region containing thermoelectric coupling constraint and ramp rate limitation; mapping an original power instruction into the feasible region and performing slope shaping to obtain a target power reference value; calculating an available energy margin and a fast power margin based on a physical boundary, and dynamically and cooperatively scheduling inertia and damping parameters of the virtual synchronous machine according to the available energy margin and the fast power margin; realizing grid-connected and off-grid seamless switching in combination with current margin gating logic; according to the invention, the system stability and the electric energy quality under complex working conditions are effectively improved.

The application provides a logarithmic generatrix bearing roller driving roller curved surface design method and system, and the method comprises the following steps: establishing a contact locus curve and constraint conditions in a world coordinate system; converting a normal vector at a contact point and a principal normal vector of the contact locus curve to a roller coordinate system, and combining the constraint conditions to obtain constraint conditions in the roller coordinate system; based on a cylindrical contact locus curve, a cylindrical locus normal vector expressed by a Z-axis coordinate value in the roller coordinate system is obtained; the cylindrical contact locus curve is a cylindrical coordinate expression of the contact locus curve in the roller coordinate system; based on the cylindrical locus normal vector, the Z-axis coordinate value in the roller coordinate system expressed by time, and the constraint conditions in the roller coordinate system, a relationship between a roller curved surface radius and the Z-axis coordinate value in the roller coordinate system is obtained, and then a design equation of the driving roller curved surface is obtained. The application solves the instability problem in the rotation of the logarithmic generatrix roller caused by the existing standard cylindrical roller driving.

The application relates to the technical field of valves, in particular to a high-temperature material flow regulating device and a control method thereof, which comprises a device body, a spring hanger fixed on the device body, an inlet and return water system, a control system, a monitoring device and a connecting pipe fixed on a discharge port of the device body. The device is aimed at the problems of poor linearity of traditional gate valves and flap valves, insufficient precision of manual regulation and open-loop control, realizes linear regulation of high-temperature material flow through the curved surface fitting design of a valve head and a valve seat, completely solves the disadvantages of small opening sensitivity and large opening sluggishness, accurately adapts to trace regulation requirements, relies on the monitoring device to collect material level and temperature signals in real time, constructs a closed-loop control through a PLC control system, automatically drives an electric actuator to adjust the position of a valve rod, does not need manual intervention, avoids human judgment errors, eliminates high-temperature scene operation safety hazards, greatly improves flow control precision and stability, and solves the problem of instability of a traditional control loop.

The application provides a simplified shield tail for a tunnel rescue shield machine and a use method thereof, and belongs to the field of collapsed body drilling rescue. The simplified shield tail comprises an annular shield tail body, a limiting part fixing base arranged on the outer wall of the annular shield tail body in a circumferential direction, and a limiting part arranged on the limiting part fixing base. The limiting part is arranged on the limiting part fixing base in a circumferential direction of the annular shield tail body, and one end of the limiting part extends to the inner side of the annular shield tail body through the tail end of the annular shield tail body to limit the segment in the annular shield tail body. A bottom rail is arranged on the bottom of the tunnel rescue shield machine and the annular shield tail body in the length direction of the tunnel rescue shield machine, and the annular shield tail body is fixedly connected with the bottom rail. The problems of the bulky structure design of the conventional shield tail of the shield machine and the certain obstruction to the smoothness of the tail of the shield machine are solved, and rescue is affected.

This invention relates to the field of multi-split air conditioning system technology, specifically to a disturbance control method for the outer loop electronic expansion valve of an air conditioning system. The problem this invention addresses is how to actively eliminate oil and refrigerant blockage and reduce exhaust temperature during defrosting or oil return processes through forced disturbance control of the outer loop electronic expansion valve. To solve this problem, this invention provides a control method comprising: acquiring the operating status parameters of the air conditioning system; determining whether the air conditioning system has triggered a disturbance program based on the status parameters; correcting the reference setting based on the exhaust temperature, compressor return superheat, and oil separator return oil temperature during the execution of the disturbance mode; determining whether to exit the disturbance program based on the exhaust temperature and the execution duration of the disturbance program during defrosting and oil return modes; and automatically exiting the disturbance program when the air conditioning system exits the defrosting or oil return mode.

The present application belongs to the technical field of complex illumination scene adaptive control, and particularly relates to a night vision strong light suppression imaging method for highway scenes. The method completes scene preliminary judgment through illumination statistical feature extraction, identifies strong light regions and extracts connected domain features, assigns differentiated suppression intensity factors based on light source types, automatically switches imaging modes, combines local exposure suppression, halo weakening, night vision enhancement, and infrared light supplementing with exposure closed-loop control, and realizes precise suppression of strong light glare, dark detail improvement, and dynamic stability of image brightness. The present application solves the problems of insufficient low-illumination imaging, difficulty in suppressing strong light, and unstable fixed parameters in the prior art, and is suitable for complex illumination scenes at night on highways, ensuring clear key information such as vehicle outlines and license plates, and meeting the needs of night safety monitoring and vehicle detection.

The present application relates to the technical field of anchor cable grouting body, and discloses a preparation method of a solidifying agent suitable for anchor cable grouting body in soft soil areas, which comprises the following preparation steps: 1) cement and water are placed in a stirrer to be stirred and mixed to form a cement solution; 2) emulsified asphalt is added to the cement solution to be stirred and mixed to form an emulsion; 3) water reducing agent and defoaming agent are added to the emulsion respectively, and the emulsion, the water reducing agent and the defoaming agent are stirred and mixed to form a solidifying agent; the shear resistance of cement is improved by using the emulsified asphalt and cement in a complex manner; compared with the cement neat grout used to reinforce soft soil, the present application can obviously improve the mechanical properties and water resistance of the solidified soft soil, reduce the risk of engineering construction, enhance the durability of the built building (structure), reduce the possibility of uneven settlement, and solve the problems of foundation pit instability and excessive deformation in soft soil areas.

The utility model discloses a kind of nonwoven fabric weld detection equipment, it is related to automatic detection technical field, including conveying system, detection system, rejecting mechanism, stacking mechanism and man-machine interactive system, characterized by, the conveying system includes air suction belt, conveying belt support and base, air suction belt is set on conveying belt support and is fixed by base, adjustable conveying belt is further equipped on conveying belt support, the detection system includes shadowless lamp box and visual detection device, shadowless lamp box is installed above conveying system, visual detection device is located below shadowless lamp box and is connected with control system by output pivot, the rejecting mechanism includes flap and defective product box. A kind of nonwoven fabric weld detection equipment provided by the utility model, by the combination of shadowless lamp box and visual detection device, high-precision detection to nonwoven fabric weld is realized, and the reliability of detection is significantly improved.

The embodiment of the application provides a kind of service system optimization method, this method involves distributed system resource management and optimization technical field, this method includes: obtaining the resource data and log data of the consumption service of message middleware system and container cluster system;Extract hardware features and running features from resource data, extract log keyword features and time correlation features from log data, extract downstream features and business features from consumption service data;According to hardware features, running features, downstream features and business features, calculate the consumption service of container cluster system Abnormal score, determine the consumption service abnormal reason type in combination with the above parameters and abnormal score, log keyword features and time correlation features;Obtain resource configuration features, load features and business target features, optimize business system in combination with abnormal reason type.Thereby, the problems such as one-sidedness of monitoring system in related art, dependence on manual for abnormal positioning are solved.

This invention discloses a training method for a weakly semi-supervised infrared weak target detection model, applied to a deep learning-based infrared weak target detection algorithm. The method includes the following steps: obtaining pixel-level mask labels and weakly supervised labels for an image set; performing one iteration of training on a CNN network using the pixel-level mask labels to obtain an initial detection model; during each iteration, updating the weakly supervised labels based on the output of the CNN network after a preset number of iterations; and performing a second iteration of training on the initial detection model using the updated weakly supervised labels and pixel-level mask labels until the network converges to obtain the final detection model. This method effectively avoids instability issues in the early stages of training and prevents network collapse when using both single-point labels and fully supervised labels simultaneously.

The invention discloses a hogging moment area structure of a steel-concrete composite beam and an anti-cracking reinforcing method, and belongs to the field of bridge engineering. A hogging moment area structure of a steel-concrete composite beam comprises a concrete panel, an I-shaped steel beam and a shearing force connecting piece, the concrete panel and the I-shaped steel beam are connected through the shearing force connecting piece, and a stress induction groove is formed in the top end of the concrete panel; through the preset V-shaped stress induction groove, random uncontrollable cracks of the concrete panel in a hogging moment area are converted into controllable deformation at a specific position; by matching with the filled asphalt horseshoe grease and the anti-crack cover plate covering the top, a stress dredging and flexible sealing dual-protection system is formed, and the path that rainwater on the road surface infiltrates downwards to corrode the steel beam is effectively blocked; in addition, the notch groove in the bottom of the anchoring part of the anti-crack cover plate and the concrete panel form a bolt pin effect, and the anti-shearing stability and the anti-stripping capacity of the cover plate under the dynamic load are remarkably improved in cooperation with fixation of countersunk bolts.

The invention relates to a health state recognition method based on image statistical characteristics. Comprising the following steps of: firstly, acquiring an original vibration signal of a bearing by using a sensor, converting the original vibration signal into a time-frequency domain color image by adopting short-time Fourier transform, and then converting the time-frequency domain color image into a grayscale image by using grayscale transform; secondly, extracting six types of image statistical characteristics from the grayscale image, wherein the six types of image statistical characteristics comprise a mean value, a variance, a contrast ratio, correlation, energy and homogeneity; then, six types of image statistical features are used as input, and a fusion feature vector is output through a designed stability-enhanced sparse PCA (Principal Component Analysis) module; and finally, performing health state recognition on the fused feature vector by using a state change detection function. The method is good in recognition effect and high in industrial scene adaptability, and provides high-precision and high-reliability technical support for predictive maintenance of equipment; the method is high in calculation efficiency, good in real-time performance and high in robustness, unification of precision, efficiency and robustness is achieved, and the method is very suitable for online real-time monitoring application in engineering practice.

This application discloses a backfilling mining method, apparatus, medium, and equipment for gently dipping thick ore bodies, relating to the field of underground mining technology in metal mines. The method includes: dividing the ore body into mining units along its vertical strike and determining structural parameters; selecting an adjacent mining area from one wing of the ore body as the first mining unit; and constructing a coordinated layout for drilling, ore extraction, and connecting roadways. Using the first mining unit as the basic operational unit, it is divided into a central main ore body area and upper and lower hanging wall triangular areas, and mining is carried out using a zoned coordinated mining process. Subsequent mining units are set up with the same parameters. While mining a portion of the first mining unit, the mining process is simultaneously applied to the corresponding areas of subsequent units, achieving spatial cross-construction. After mining is completed in each area of ​​the first mining unit, backfilling is carried out promptly, reserving a runway riser as a free face for subsequent mining, and reusing existing roadways as operational and ore extraction channels, achieving cyclic mining from one wing of the ore body to the other.

The present application relates to geothermal water treatment technical field, disclose a kind of geothermal water water gas separation device, including tank body, tank cover being located at the top of tank body, inlet being located at the top of tank body, drain outlet being located at the bottom of tank body and exhaust port being located at the top of tank cover, further including multistage water collecting assembly being located in the middle of the inner cavity of tank body and resonance separation assembly being located in the inner cavity of tank body;Multistage water collecting assembly includes three groups of arc water collecting pipes being spaced apart along the axial direction of tank body and spiral water injection pipe being communicated with inlet;Resonance separation assembly includes umbrella-shaped water catcher being fixedly installed in tank cover, vertical rod being fixedly connected in the center of umbrella-shaped water catcher and extending downward, and three groups of floating units being arranged on vertical rod;The present application is provided with floating unit, so that conical screen disc produces continuous vibration when fluid impact, and the vibration forms shear force and local disturbance in fluid, which can break the stable state of micro-bubbles in water body, promote its desorption and collision coalescence.

The utility model relates to the technical field of pay-off racks, and discloses a portable pay-off rack for pay-off construction, which comprises a bottom frame, the rear ends of the outer walls of the two sides of the bottom frame are both provided with movable grooves, the front ends of the inner bottom surfaces of the movable grooves are both provided with a plurality of latch grooves, the front ends of the inner walls of the two sides of the bottom frame are both hinged with main support frames, and the main support frames are provided with clamping grooves. An auxiliary supporting frame is rotationally connected to the middle of the inner wall of the main supporting frame, a rod containing groove is formed in the rear end of the upper surface of the main supporting frame, and a blocking piece is rotationally connected to the edge of the rear end of the upper surface of the main supporting frame. According to the pay-off rack, the rod containing groove is provided with the blocking piece capable of being opened and closed, the blocking piece is opened and closed through the damping effect of the damping spring, opening and closing at any angle are achieved, the pay-off rack is a portable folding type product and is provided with the multi-position adjustable clamping tooth groove, overall rapid opening and closing are achieved, the shaft rod is rapidly adjustable, and the pay-off rack is convenient to use and high in practicability. The auxiliary supporting frame for improving stability is arranged at the lower end of the main supporting frame, and the problem of instability in the using process is solved.

The invention provides an adhesion cementing wall-fixing agent and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing polyvinyl alcohol with a first solvent to obtain a first material; (2) mixing a raw material system containing tannic acid, terephthalic acid and a pH regulator with a second solvent, and carrying out a first reaction to obtain a second material; and (3) mixing the first material with the second material, and carrying out a second reaction to obtain the adhesion cementing wall-fixing agent. The adhering and cementing wall-fixing agent provided by the invention has an excellent borehole wall stabilizing effect and can maintain the stability of the borehole wall for a long time.

The application relates to the technical field of motor control, and particularly discloses an automatic calibration method for a full-speed-domain lookup table of a permanent magnet synchronous motor, which comprises the following steps: MTPA automatic calibration, d-axis limit current search, MTPA automatic calibration-based d-axis limit current search, and maximum q-axis current boundary line-based acquisition of a field-weakening region current lookup table. In the method, the MTPA and the field-weakening region calibration are both based on rotor flux orientation current loop control, without additional voltage control and lookup table conversion, so that the lookup table calibration for full-speed-domain control of the motor is efficiently realized, and meanwhile, the d-axis limit current search fully considers the voltage limit ellipse under a higher rotating speed, thereby achieving the efficiency that cannot be achieved by traditional offline calibration and avoiding the possible instability problem of the existing calibration technology.