91results about How to "Improve control accuracy" patented technology

The invention relates to the technical field of semiconductor equipment, and provides a pipeline structure identification method, a pipeline structure identification device and semiconductor equipment, and the method comprises the steps: identifying a pipeline control set from each visual element contained in a graphical interface for displaying a pipeline diagram; wherein the types of the pipeline controls comprise pipelines, multi-way pipe fittings and valves; the pipeline control of the pipeline type has a pipeline flow direction; on the basis of the control connection judgment sub-process, determining that each pipeline control in the pipeline control set has a subsequent pipeline control with connected ports or overlapped controls in the pipeline flow direction, so as to obtain a pipeline connection structure; identifying each pipeline path in the pipeline connection structure to form a pipeline path set; and determining an effective path in the pipeline path set based on the flow direction relation between the ends of the pipeline control of the multi-way pipe fitting type in different pipeline paths. Therefore, the connection and the upstream and downstream relation between the pipeline nodes can be automatically extracted according to the displayed pipeline diagram, and the node control efficiency is effectively improved.

The double-edge sawtooth bone knife comprises a knife rod, the knife rod is connected with a blade, and the section, away from the knife rod, of the blade is provided with a cutting part; the cutting part comprises a first sawtooth part arranged at the end of the blade, a second sawtooth part and a third sawtooth part, the second sawtooth part and the third sawtooth part are arranged on the two sides of the blade respectively, the second sawtooth part and the third sawtooth part are connected to the two ends of the first sawtooth part respectively, and each of the second sawtooth part and the third sawtooth part comprises a plurality of convex back teeth. The cutting part has the advantages that the tooth-shaped structural design of the cutting part is optimized, vibration and noise during use are reduced, and the cutting quality can be improved.

This utility model provides a stainless steel flange device, including a support base and a side bracket. A servo motor is installed in the middle of the upper end of the support base. The shaft end of the servo motor is connected and fixed to the flange table through a flange and bolts. Multiple support rods are installed longitudinally on the lower edge of the flange table. Multiple lower mold seats and multiple signal transmitters are fixed on the upper edge of the flange table. A side bracket is welded to the lower left side of the support base. This design solves the problem that the original thin-walled stainless steel flange device is difficult to adapt to the material characteristics of stainless steel and is prone to defects due to "deformation concentration and stress loss" in a single punching of the convex ring. This utility model adopts a semi-automatic drive structure, which can facilitate the two-stage punching and flanged of stainless steel pipes of different sizes. The "conical pre-punching + flat final punching" achieves controllable stress, improved accuracy and reduced defects through step-by-step dispersion of deformation. It is especially suitable for high-precision and multi-specification stainless steel flange scenarios.

The application discloses a kind of cleaning device of work roll for galvanized strip steel processing, including bearing base plate, rolling mill main body, roller conveyor, straightening machine main body, cutting machine main body and flattening machine main body, and the bottom end in rolling mill main body is connected with cleaning assembly by cleaning cavity, cleaning assembly can clean the work roll body in rolling mill main body, cleaning assembly includes horizontal mechanism, swing mechanism and reverse mechanism, swing mechanism can be moved and adjusted left and right, adapt to the work roll body of different positions, swing mechanism top is connected with reverse mechanism, can drive reverse mechanism to swing left and right, adapt to the arc structure of work roll body outside, reverse mechanism includes installation frame, cleaning wheel one and cleaning wheel two etc., under the cooperation of each other, by the reverse rotation of cleaning wheel one and cleaning wheel two, the cleaning effect of work roll body outside is strengthened, and the stripping effect of material on work roll body outside is improved, to realize more high-quality cleaning effect.

This invention relates to the field of lighting control technology, specifically disclosing an environment-adaptive LED constant current energy-saving control method. The method includes: arranging a dielectric-photoelastic sensing array, a magnetostrictive-leakage flux detection coil, and a broadband impedance spectrum detection unit on the phosphor encapsulation layer, the inductor core, and the output bus, respectively; simultaneously acquiring three types of timing signals; extracting dielectric-magnetic-electric coupling degradation feature vectors; inputting the feature vectors into an energy-saving-lifetime co-optimization model; correcting the target luminous flux based on the dielectric relaxation offset; constructing a core loss-efficiency mapping surface to solve for the minimum energy consumption operating point; generating a constant current target value offset sequence and a PWM chopper phase-frequency co-transfer strategy; and simultaneously adjusting the duty cycle, switching frequency, and gate impedance through a feedforward-feedback composite adjustment network, and feeding back the current ripple spectrum and dielectric relaxation offset to update the feature vector weights. This invention achieves multi-physics field co-sensing and energy-saving-lifetime co-optimization.

The application relates to a double anti-overpressure safety control system and method of a steam-water dual-purpose furnace, which comprises an enhanced signal acquisition unit, an electronic control unit, an executing mechanism, a physical protection unit, a man-machine interaction and data management unit; the physical protection unit comprises three-stage relief devices independently installed on a steam pocket; the enhanced signal acquisition unit comprises a pressure monitoring module, a flow monitoring module, a temperature monitoring module and a safety component state monitoring module; the man-machine interaction and data management unit comprises an HMI and a data storage module; the executing mechanism comprises a frequency conversion burner, an electric feed water pump and an electric regulating valve V1 receiving PLC analog output; the PLC programmable logic controller controls the frequency conversion burner, the electric feed water pump and the electric regulating valve V1 based on the data collected in each module of the enhanced signal acquisition unit. The application greatly reduces the probability of serious overpressure accidents caused by single element or system failure.

The application discloses a low-vibration active phase modulation composite pulse tube Stirling cryogenic refrigerator and belongs to the technical field of cryogenic refrigerators. The composite refrigerator cold finger integrates a first Stirling component as a high-temperature stage and a second pulse tube component as a low-temperature stage. The innovation is that the phase modulation unit of the second pulse tube component is composed of a second inertia tube wound and fixed in the inner circle of the gas reservoir, and the gas reservoir is integrally connected to the first cold end heat exchanger to improve the system efficiency through low-temperature arrangement. At the same time, the motion state of the compressor piston and the first displacer is monitored and cooperatively controlled in real time through the compressor displacement sensor and the cold finger displacement sensor, active and accurate phase modulation is realized, and the active vibration damper is used to perform reverse compensation according to the motion feedback of the first displacer to significantly offset the vibration output of the whole machine. The application realizes the unity of high efficiency, low vibration and high reliability, and is particularly suitable for vibration-sensitive space exploration and other application scenarios.

The invention relates to the technical field of semiconductor lasers, in particular to a compact ultra-narrow linewidth external cavity laser based on a top metal reflection grating, which comprises a gain chip, the left end face of the gain chip is plated with a high reflection film, and the right end face of the gain chip is plated with a first antireflection film; the right side of the gain chip is provided with a metal grating waveguide, the right end face of the gain chip is aligned and attached to the left end face of the metal grating waveguide, the left end face of the metal grating waveguide is plated with a second antireflection film, and the right end face of the metal grating waveguide is plated with a third antireflection film; the gain chip comprises a substrate, the upper part of the substrate is provided with a ridge optical waveguide, and the upper part of the ridge optical waveguide is provided with a metal cover Bragg reflection grating. Through the centimeter-level metal grating and the low-loss coupling structure, light beam quality with 3dB line width less than 750Hz and M2 less than 1.1 is realized.

The application discloses a measurement method, device, terminal, base station and storage medium, wherein the method comprises: a first terminal receives first signaling sent by a base station; wherein the first signaling is used for configuring first measurement resources available for the first terminal to perform CSI measurement; the first measurement resources are determined based on a first time slot; and the first time slot represents a time slot when a channel of the first base station is turned off or reopened.

The invention relates to a dual-module intercooler type fuel cell cathode inlet temperature and humidity cooperative control method. The method comprises the steps that fuel cell cathode air inlet real-time state parameters and operation parameters are obtained, a multivariable coupling prediction model is constructed after preprocessing, and a temperature and humidity reference and an oxygen stoichiometric ratio target reference are set in combination with heat exchange characteristics of a dual-module intercooler; then the core body heat exchange distribution proportion is regulated and controlled, humidification adjustment is matched, and the core body heat exchange distribution proportion and the humidification adjustment intensity are dynamically adjusted according to the real-time working condition; comparing the deviation between the adjusted actual temperature and humidity and the target temperature and humidity reference, and correcting the heat exchange distribution proportion and the humidifying adjustment parameter through a dynamic constraint correction model; cooperative regulation and control of cathode inlet temperature and humidity are realized, dynamic change of working conditions is adapted, and stable operation of the fuel cell is guaranteed.

The utility model relates to the technical field of tunnel construction, in particular to a tunnel drilling deviation rectifying device which comprises a supporting disc, a rotating plate is movably connected to the interior of the supporting disc, a first connector is fixedly connected to one face of the rotating plate, a second connector is fixedly connected to the other face of the rotating plate, and an inserting rod is connected to the surface of the supporting disc in a penetrating mode. Under the connection of the rotating plate and the first connector, the horizontal rotating effect on the drill rod is achieved, it is guaranteed that a drill hole is horizontal, deviation is avoided, under the connection of the adjusting groove and the adjusting frame, the contact area of the drill rod and a tunnel face is increased through the action of the contact plate, the stable supporting performance of the inserting rod to the supporting disc is improved when the inserting rod is used in an inserted mode, and the service life of the drill rod is prolonged. And through abutting contact of the pressing block and the inserting rod, the connecting position between the inserting rod and the supporting disc is fixed, the supporting disc moves along with movement of the position of the inserting rod, and the regulation and control accuracy of the using levelness of the supporting disc is improved.

The utility model relates to the technical field of slitting devices, and discloses a composite aluminum foil production slitting device which comprises a base plate, a slitting assembly, a dust collection assembly, a discharging assembly and a winding assembly. According to the slitting device for composite aluminum foil production, a rotating rod is driven through meshing transmission of a worm gear and a worm, a first face gear and a second face gear are in linkage, a first rack and a second rack are driven to move in the opposite directions, a first sliding block and a second sliding block synchronously slide along a transverse guide rail, one-key adjustment of the distance between multiple sets of cutting knives is achieved, and the cutting efficiency is improved. A dust collection head in the dust collection assembly is connected with a dust collector body through a corrugated pipe and is matched with an electric push rod to adjust the height of a supporting plate, slitting chippings are adsorbed in real time, the situation that too many chippings are accumulated on the surface of a slitting knife, and consequently the slitting efficiency is affected is avoided, a guide roller ensures that aluminum foil is conveyed straightly, and deviation is avoided; therefore, the overall structure is simplified, the precision is controllable, and the defects in the prior art are effectively overcome.

The application discloses a kind of textile production multi-device collaborative intelligent management and control systems, it is related to collaborative management and control technical field, comprising: data acquisition module, for collecting textile production each process equipment working condition data, generates independent input unit;Topology reconstruction module is used to divide out equipment inherent working condition component matrix, cross-device topology coupling component matrix and random noise component matrix, and stripping coupling disturbance and random noise obtains equipment independent working condition component matrix;Subgroup division module is used to calculate the topological correlation between devices and constructs device topological correlation matrix, carries out collaborative management and control subgroup division, generates the collaborative weight matrix corresponding to each subgroup;Collaborative control module is used to construct three-level hierarchical collaborative control architecture, complete production task decomposition and global scheduling, subgroup process parameter collaborative optimization calculation and equipment process parameter real-time adjustment and feedback, effectively improve the dynamic, accuracy and stability of textile production multi-device collaborative management and control.

This invention discloses a time-delay-resistant and energy-saving motion control method and system for a flat-type all-wheel-drive AUV. The invention includes: constructing a six-degree-of-freedom hydrodynamic model of the AUV based on submarine maneuverability theory; identifying the setpoint pure time delay and rotational acceleration characteristics of the propeller through multi-condition testing, and constructing a nonlinear propeller dynamic model including a pure time delay element and a nonlinear rotational speed dynamic response model; constructing a composite control architecture integrating a dual-loop PID controller, a Smith predictor, and a model reference adaptive controller (MRAC); using the Smith predictor to perform explicit time delay compensation for the vertical plane motion subsystem, and using MRAC to update the adaptive gain online to compensate for model mismatch. This invention effectively suppresses high-frequency pitch angle jitter, reduces ineffective commutation movements and energy consumption of the propeller, and significantly improves the high-speed operational stability and endurance of the flat-type AUV.

The application discloses a parallel RCM mechanism end effector for orthopedic surgery, which comprises two motors, three movement units, a double parallelogram linkage mechanism and a ball mill. The two motor axes are perpendicular and are installed on a base. The motor A is hingedly connected to the bottom end of the first movement unit; the motor B is hingedly connected to the bottom end of the second movement unit; the third movement unit is symmetrically arranged with the second movement unit and is hingedly connected to the base at the bottom end. The upper rod end of the double parallelogram linkage mechanism is hingedly connected to the top end of the second and third movement units through a rotating shaft; the lower rod end is hingedly connected to the three movement units through a rotating shaft. The upper rod and the lower rod are rotationally connected to the ball mill at the front ends. The double parallelogram linkage mechanism is used to make the center of the ball mill head coincide with the fixed point of the RCM mechanism, and the mechanism characteristic of the fixed point of the RCM mechanism is utilized. The fixed point is made to coincide with the ball center of the ball mill head, so that the position of the ball mill head is unchanged when the posture of the ball mill is changed, the posture of the ball mill does not affect the grinding process in the grinding process, the posture of the ball mill can be adjusted, the obstacle avoidance can be better realized, and the safety is improved.

This application discloses a robot control method, apparatus, device, and storage medium, relating to the field of artificial intelligence technology. The method includes: obtaining an estimated Jacobian matrix for the robot based on the robot's historical measured poses of its end effector and historical measured joint angles; constructing a quadratic programming equation for the robot based on the measured joint angles, measured poses, predicted pose sequences, desired pose sequences, predicted joint angular velocity sequences, predicted joint angle sequences, and the estimated Jacobian matrix at a target time; solving the quadratic programming equation to obtain the predicted joint angular velocities of the robot at the target time; and controlling the end effector to follow the desired pose at the target time based on the predicted joint angular velocities at the target time. This application can directly handle the robot's joint constraint problem and accurately execute pose following tasks for robots with unknown models, thereby improving the robot's control accuracy and versatility.

The invention provides an operation strategy optimization method and device for a central air conditioning system, and relates to the technical field of intelligent control, the method comprises the following steps: step 1, dividing an airport terminal into five sub-regions with independent temperature control requirements according to building function partitions of the airport terminal, and respectively setting corresponding temperature and humidity control parameters for each sub-region; and step 2, setting three acquisition points in each sub-region, and acquiring environmental parameters and people flow density data of each sub-region in real time. According to the method, temperature control parameters are set in different areas, data are collected in real time, sub-area load prediction models are established, operation parameters are optimized in a multi-target mode, and the operation parameters of the sub-areas are dynamically corrected, so that the total energy consumption and the operation cost of the system can be effectively reduced on the premise of meeting differential temperature control requirements of all the sub-areas of the airport terminal; and the energy utilization efficiency and the environmental comfort are improved.

The invention relates to the technical field of automobile stamping part welding, in particular to an automobile stamping part welding clamp which is characterized in that a clamping mechanism is arranged on a driving table, an assembling mechanism is arranged above the clamping mechanism, and a detection mechanism is arranged on the assembling mechanism; according to the device, stable horizontal limiting can be conducted on the middle of the spoke, vertical positioning can be conducted on the rim, unified concentric limiting can be conducted on the spoke and the rim, balanced downward pressure can be synchronously applied to the middle and the outer edge of the spoke, and even radial pressure can be synchronously applied to the inner side of the outer edge of the spoke; the assembly clearance between the two parts and the deformation state in the stress release process of the spoke can be effectively detected; effective rigid limiting can be carried out on all spatial degrees of freedom, possibly causing relative deflection, of the spoke and the rim; the spoke and rim assembly can be directly welded without being conveyed, transferred and secondarily clamped.

This invention relates to the field of intelligent control technology, specifically to an intelligent closed-loop control system coupling oxygen and carbon content with process parameters. The system includes a multi-parameter acquisition module, a parameter coupling deviation correlation data module, a priority-based soft-loop control command module, a detection frequency adaptation scheme module, and an intelligent closed-loop control execution command module. This invention, by real-time acquisition of multiple types of parameters and their classification with standard thresholds to establish an index, determines parameter deviations to uncover the causal mapping relationship between oxygen and carbon concentration and other process parameters. Priority-based soft-loop control commands are generated according to the deviation's impact weight. Stability is assessed by evaluating the time-series curve characteristics of the oxygen and carbon concentration after control, matching the sampling strategy, and correcting the weight coefficients to feed back into the control commands. This improves the accuracy of parameter control, enhances control stability, optimizes detection adaptability, and ensures stable operation of the production process.

The present disclosure provides a control method of an underwater cleaning device and an underwater cleaning device, and relates to the technical field of underwater cleaning. The method comprises: collecting multi-modal perception data of a target cleaning operation area; the multi-modal perception data comprises a visible light image collected by a first perception module and an infrared structured light image collected by a second perception module; based on the visible light image and the infrared structured light image, cleaning semantic information and three-dimensional structure information of the target cleaning operation area are determined respectively, and cleaning power parameters are generated accordingly; finally, the underwater cleaning device is controlled to clean the target cleaning operation area based on the cleaning power parameters. Through the collaborative acquisition and joint utilization of the semantic information and the three-dimensional structure information of the target cleaning operation area, the present disclosure can provide more sufficient state basis for the determination of the cleaning power parameters, thereby improving the cleaning control accuracy of the underwater cleaning device on the target cleaning operation area.

The invention discloses an ambient light detection method, a display screen adjusting method, an electronic device and a storage medium, the ambient light detection method is applied to the electronic device, the electronic device comprises a display screen and an ambient light sensor located below the display screen, and the ambient light detection method comprises the steps that when the display screen is in a display state, the ambient light sensor is located below the display screen; acquiring first ambient light data acquired by an ambient light sensor; determining reflected light data, collected by the ambient light sensor, of the display screen; and determining second ambient light data of the environment where the display screen is located according to the first ambient light data and the reflected light data. According to the method, the ambient light of the environment where the display screen is located is detected according to the ambient light data collected by the ambient light sensor and the reflected light data of the display screen, the reflected light data in the ambient light data collected by the ambient light sensor can be effectively eliminated, and the detection accuracy of ambient light detection is improved.

The utility model relates to road construction technical field especially relates to a kind of sandstone multistage screening device for rural road construction, it includes sandstone screening cylinder for rural road construction, and multiple screening mechanism is provided in sandstone screening cylinder inside, and discharge assembly is provided on sandstone screening cylinder outer wall;Multiple screening mechanism includes first filter screen, second filter screen and third filter screen are sequentially provided in first filter screen lower side, and discharge assembly includes three discharge cylinders, gate is opened in discharge cylinder upper side, slide column is provided in discharge cylinder side, and three groups of lateral support plate are fixedly installed in slide column side edge.This utility model is equipped with multiple screening mechanism and discharge assembly, and three-stage filter screen is used to screen sandstone in turn, and various particle size sandstone is finely screened, to meet the needs of rural road construction, in addition, discharge assembly can timely export sandstone remaining on each filter screen, avoid filter screen blockage, improve screening efficiency.

The application discloses a kind of severe spinal deformity correction instrument and system, belong to medical instrument technical field, the severe spinal deformity correction instrument includes lifting screw holder and fixed screw holder, lifting screw holder is used to connect fixed to the pedicle screw of severe spinal deformity segment, lifting screw holder is equipped with lifting cross on it;Fixed screw holder is used to connect fixed to the pedicle screw of normal curvature segment of spine, and fixed screw holder is equipped with fixed cross on it;The side of lifting screw holder and fixed screw holder is equipped with the support rod of horizontal arrangement, and the severe spinal deformity correction instrument further includes connector.The severe spinal deformity correction instrument and system of the application can be suitable for severe spinal deformity disease, and power and accuracy can be controlled in operation process.

The utility model discloses a high temperature high pressure fluid rotary seal joint. The joint includes outer tube, rotary inner tube, two rows of zirconium oxide ceramic bearing, the rotary gley ring seal assembly and the compression ring made of PI / FFKM material. The ceramic bearing effectively solves the rotary jam problem under high temperature; the double gley ring sealing lip design has the fluid power groove, and the friction and abrasion are reduced significantly while realizing the high pressure sealing; all metal parts adopt 06Cr19Ni10 stainless steel, and the corrosion resistance is ensured. The utility model solves the sealing failure, jam and abrasion problem of the prior art under 300 DEG C, 5MPa aviation kerosene medium environment through material innovation and structure optimization, and is especially suitable for the fluid transmission system of high-end equipment such as aerospace engine, and has high reliability and long life.

The application provides a kind of three-dimensional robust formation control method of underactuated underwater vehicle based on super-spiral observer, comprising: step one, the kinematic model and the dynamic model of underactuated AUV formation are established;Step two, define the directed graph for describing the communication topological relationship between multiple AUVs in underactuated AUV formation;Step three, based on the fluid coordinate system, design a distributed cooperative guidance law based on the above steps;Step four, introduce super-spiral observer to estimate the complex disturbance of underactuated AUV formation;Step five, based on the compensation of the complex disturbance, design a super-spiral dynamics control law, and control the AUV formation.The application designs a distributed cooperative guidance law to realize the cooperation of each AUV in path parameters and expected speed, introduces a super-spiral observer to estimate the complex disturbance, and designs a super-spiral dynamics control law based on disturbance compensation to realize control in limited time.Compared with the traditional control method, it has implementation value in ocean engineering.

The application discloses a kind of mechanical automatic transmission rotational speed synchronization self-adjusting predictive control method, comprising: the initial length of calculating brake combination signal sending to brake torque reaches constant value time point;Brake shaft speed drop value during brake torque constant time point is calculated to brake torque start to produce brake torque;Brake torque is zero during brake torque from constant brake torque start to reduce, and brake shaft speed drop value;According to the initial value of dynamic speed difference threshold value calculated according to the above results;Test the extreme value of brake friction plate separation torque reduction stage duration;According to the initial value of the extreme value of brake shaft speed curve parameter in separation torque reduction stage;According to the size relationship between the difference between the target speed of brake shaft before braking and current speed and dynamic speed difference threshold value, the rotational speed synchronization of transmission is controlled.The application improves control accuracy, shortens gear shifting time, improves gear shifting smoothness, enhances the robustness and stability of control method under time-varying working condition.

The application provides a mirror convergence method and device based on double feedback surface shape regulation and optimization, which comprises the following steps: monitoring the wavefront component after the surface shape of a deformed mirror is modulated in real time by using a wavefront sensor; judging whether the surface shape coefficient residual of the wavefront component is greater than or equal to a set threshold; if yes, quickly calculating the surface shape reconstruction voltage by using an influence function matrix, and making the deformed mirror quickly converge based on the surface shape reconstruction voltage; if no, monitoring the change of light intensity distribution or imaging definition by using an image sensor, and taking the change as an evaluation parameter of the correction degree of the distorted wavefront; and based on the evaluation parameter, improving the surface shape reconstruction precision by using a search optimization algorithm. The application makes up for the defects that the control precision of the closed-loop control algorithm based on the influence function is affected by the measurement precision of the influence function matrix, and the closed-loop control algorithm without the influence function has low calculation efficiency and is easy to converge to a local optimal value, and can meet the requirements of a non-moving zoom steady image system.

The utility model relates to a torque sensor, a mechanical finger and a robot system, comprising a base, a capacitance digital conversion circuit, a processing module, a fixed block and a support column, the fixed block is used for physically connecting a stress assembly, and the support column prevents the fixed block from normal pressing deformation; at least two transformation units symmetrical around the supporting column are arranged between the base and the fixing block, the projection area of the transformation units is smaller than that of the fixing block, and the transformation units and the fixing block are mechanically coupled; the surface, opposite to the base, of the conversion unit is provided with a moving electrode, a static electrode located on the base is arranged below the moving electrode, the static electrode and the static electrode are insulated, and the surface precision of the static electrode is larger than that of the fixed block and / or other areas of the base. The fixed block is stressed to drive the conversion unit to generate micron-order distance change between the moving electrode and the static electrode at most; the capacitance digital conversion circuit obtains capacitance between the moving electrode and the static electrode; the processing module outputs an electric signal representing the torque according to the difference between the capacitors.

This invention discloses a control method and system for a solenoid valve. The method includes: controlling the operation of the solenoid valve based on preset control parameters, and acquiring vehicle operating data and solenoid valve response data; determining a target correction coefficient based on the operating data and response data; adjusting the preset control parameters based on the target correction coefficient to obtain target control parameters; and controlling the operation of the solenoid valve based on the target control parameters. This invention solves the technical problem of low control accuracy of solenoid valves in related technologies.

The invention discloses a multi-CA certificate synchronization and security management and control method and system supporting a national cryptographic algorithm, belongs to the field of information security and digital certificate management, and aims to solve the problems of poor adaptability, low synchronization consistency, coarse management and control granularity and low conflict resolution efficiency of the national cryptographic algorithm in the prior art. The method comprises the following steps of: completing bidirectional identity authentication among multiple CA nodes through a national cryptographic algorithm, and establishing an end-to-end national cryptographic security communication channel; preprocessing the certificate data to be synchronized; dividing hierarchical synchronization priorities based on certificate attributes and triggering a synchronization request; the receiving end CA node decrypts the verification data, and if certificate version state conflicts exist, a local certificate library is updated after automatic resolution is carried out through an intelligent conflict resolution method; and implementing multi-dimensional fine-grained security management and control based on the full-life-cycle attribute of the certificate. According to the method, the compliance and consistency of multi-CA certificate synchronization are improved, the control precision is enhanced, and the method is suitable for government affairs, finance and other high-security-demand fields.