79 results about "Passive control" patented technology

The invention discloses an intelligent shock absorption and noise reduction control method for rail transit, and belongs to the technical field of rail transit noise and vibration control. The method aims at solving the problems that traditional passive control measures are poor in adaptive capacity and limited in frequency band, and effective prospective offset is difficult to achieve due to system delay and inaccurate reference signals in existing active control. The method comprises the following steps: synchronously acquiring vibration and noise signals through a sensor array; calculating the contribution weight of vibration to noise by using a cross-domain modal correlation module based on an attention mechanism, and fusing the features; predicting an evolution sequence of vibration and noise in a specific time period in the future by adopting a long-short-term memory network model; synthesizing a target reference signal according to the prediction sequence, and generating an anti-phase control signal through an adaptive filtering algorithm; finally, it is ensured that the total delay of the system is smaller than the feedforward advance time, and an actuator is driven to achieve accurate foresight counteracting. The method is mainly used for improving the self-adaptive capacity and the control effect of the rail transit damping and noise reduction system.

The embodiment of the utility model provides a charger output anti-reverse connection and anti-reverse charging protection device, and belongs to the technical field of charging safety. The charger output anti-reverse connection and anti-reverse charging protection device comprises a relay arranged at the output end of a charger and used for executing connection / disconnection of a charging loop through actuation / disconnection; the relay is connected with a relay control circuit and is used for controlling the relay to be switched on or switched off along with the voltage state of the charging loop; the detection circuit is connected to the charging loop and used for responding to the voltage state of the charging loop; and the charging loop is also connected with the relay control circuit, and transmits the voltage state to a relay driving module of the relay control circuit in real time. According to the scheme of the utility model, complicated signal judgment is not needed, passive control is realized only by depending on the voltage state, the system complexity is reduced, the protection on the charger and the battery is enhanced, and the service life of equipment is prolonged.

The application discloses an experimental device containing a uniform distribution gyro truss structure, which comprises a first connecting piece, a first rod, a rotor, a brushless motor, a motor connecting plate and a truss fixing plate. The first connecting piece and the second connecting piece are both assembled into the end face of the free end of the gyro truss structure through interference fit with the first rod, the second rod and the third rod. The four interface nodes of the first connecting piece and the second connecting piece are connected respectively. The third connecting piece and the fourth connecting piece are assembled into the gyro truss unit through interference fit with the first rod, the second rod and the third rod for multiple times. Each gyro truss unit is connected into the main body structure of the truss in the form of module. The brushless motor adds angular momentum to the truss structure. The vibration of the truss is suppressed through the uniform distribution gyro truss structure, which belongs to passive control. Compared with the PID control mode, the application has the advantages of quick reaction, low cost and fast effect.

A jacket assembly 100 is provided for attachment to a subsea flexible line for facilitating passive control of movement of the flexible line. The jacket assembly comprises a plurality of jackets (FIG

The invention relates to the technical field of air curtain machine control, in particular to an air curtain machine intelligent airflow control system based on computer vision, which comprises a sensing module, a data processing module, an execution module, an environment sensing module and a control module, the motion trail identification module is used for identifying a real-time motion trail of a motion target in the real-time video data through a computer vision algorithm and predicting a future motion trail of the motion target through a prediction algorithm; compared with the prior art that a passive control scheme adopting fixed wind speed or simple infrared triggering has the defects that energy consumption is high and airflow is stiff and abrupt, an active pre-control strategy based on computer vision prediction is adopted, the pedestrian trajectory is accurately predicted, and a matched airflow barrier is established in advance, so that the pedestrian trajectory is accurately predicted. Effective combination of non-inductive passing experience and on-demand energy supply is realized, and the system has the advantages of remarkably improving comfort and greatly reducing ineffective energy consumption.

The application discloses a kind of hypersonic speed cavity flow induced noise passive control device and control method, it is suitable for Mach number 4.0 flow M219 classic open cavity, its size is normalized with the cavity depth as benchmark, cavity length-width-depth ratio 5:1:1, at the bottom of cavity downstream, from the front wall, setting integrated three-dimensional small-size continuous triangular pyramid turbulence device, length-width-height size is,, Using aviation titanium alloy or high-temperature alloy;The installation position is determined by IDDES simulation, the scale of downstream backflow vortex is reduced by using turbulence structure, the impact of bottom wall is weakened, self-sustaining oscillation is inhibited, the peak value of Rossiter low-frequency mode is reduced, and the maximum total sound pressure level is reduced by about 4dB.The application is pure passive control, without additional energy consumption, simple structure, suitable for noise suppression of cavity structure such as internal embedded bomb cabin of hypersonic vehicle.

Apparatuses, systems, and methods are disclosed for regulating an eversion process in everting sheath systems to avoid uncontrolled deployment of the sheath. The sheath system includes a reel and a sheath stored thereon, where the sheath is capable of everting from a retracted position to an extended position as the reel rotates about a rotational axis. The rotational characteristics of the reel are controlled by a torque mechanism operable to directly or indirectly apply a passive torque to the reel to adjust a rate at which the sheath is released from the reel as the sheath everts from the retracted position to the extended position.

The application discloses an airplane ground air conditioner energy-saving control method combining environmental parameter prediction, and relates to the technical field of airplane ground support equipment. The method comprises the following steps: collecting airport environmental parameters in real time, training a machine learning prediction model in combination with historical data, and predicting environmental change trends in advance; analyzing the thermal characteristics of an airplane according to the characteristics of the airplane, performing landing time error compensation, and accurately obtaining an environmental parameter sequence of a landing period; calculating an environmental parameter and a cabin thermal characteristic deviation coefficient, and dynamically configuring temperature and energy-saving weights; and iteratively optimizing air conditioner control parameters by using a multi-objective optimization algorithm to obtain optimal air conditioner control parameters. The application realizes the transformation from passive control to active prediction, effectively solves the problems of control lag and high energy consumption in the prior art, significantly reduces energy consumption while ensuring comfort, and improves the intelligent level and operation efficiency of an airplane ground air conditioner system.

The application discloses a chip bottom layer topology control method and system based on discrete space-time dual mapping, and belongs to the technical field of integrated circuit bottom layer intelligent control. In view of the bottom layer defects of traditional chip hardware and information being split, relying on external driving, architecture being solidified, scheduling being redundant, and lacking self-adaptive evolution capability, the application is based on the original TPS-CCC discrete space-time information-physical dual theory, constructs a three-dimensional topological dual mapping system, establishes hardware native topological evolution driving logic, and realizes chip computing power autonomous scheduling, hardware self-adaptive reconstruction, error self-healing correction and dynamic power consumption optimization. The application overturns the software passive control paradigm of the traditional chip, creates the next-generation chip bottom layer general paradigm of hardware-level autonomous intelligent control, has extremely high bottom layer theoretical barriers and full-coverage protection range, can be adapted to all types of high-end semiconductor chips, and has extremely strong industry monopoly and industrialization value.

The application discloses a kind of multi-energy distribution network voltage control methods, comprising the following steps, define local voltage control rule;Analysis distributed power output causes voltage fluctuation upper and lower limit;Build global voltage control function;Algorithm is solved to objective function, the local voltage control rule is acquisition control point voltage u, determine whether to satisfy the following constraint, set the reactive power output of voltage compensation device.The multi-energy distribution network voltage control method, considering the uncertainty fluctuation of distributed power supply, improve the accuracy of voltage fluctuation analysis, formulate the localized voltage adjustment rule and global voltage optimization function, realize passive control and active control combination, reduce fluctuation rate, using interval number to express the uncertainty of distributed power supply, less computing resource demand, control reaction speed is fast.

The present application relates to the field of metal continuous casting automation control, and discloses a copper rod processing and manufacturing process linkage control system and method, the method comprising: dividing the cast blank into virtual slices according to the pulse signal to construct a data queue; calculating the heat content characteristics of the temperature and flow signals, processing abnormal data and marking characteristic anchor points; combining the linear speed to deduce the theoretical time stamp of the slice reaching the rack; comparing the torque differential polarity and the heat content mutation direction within the theoretical time window to verify the signal, extracting the actual time stamp to correct the theoretical time stamp; generating a feedforward torque instruction according to the heat content characteristics and issuing it to the frequency converter. Through the cross-checking of thermal state and mechanical dynamics and the adaptive correction of the time stamp, the temperature measurement distortion interference is eliminated, the spatial accurate alignment is realized, the torque reserve is established before the abnormal material contacts the rack, the hysteresis of the traditional passive control is overcome, the tension shock is reduced, and the risk of belt breakage is reduced.

The application discloses an active isolation-passive damping-energy recovery integrated composite isolation wall, belonging to the field of rail transit, comprising a magneto-rheological damping unit, a linear motor displacement control unit, a passive vibration control module, a bottom support element, a top covering module and the like; the magneto-rheological damping unit guarantees controllable damping force of the magneto-rheological damping unit through the magneto-rheological effect of magneto-rheological fluid in a cavity, and actively controls the train track in real time; the linear motor displacement control unit accurately adjusts the system displacement, and realizes active vibration control; the passive vibration control module realizes efficient vibration energy attenuation through cooperation of various elements; the bottom support element provides bearing and stable support, and the top covering module has vibration monitoring and vibration energy conversion and protection functions. The isolation wall combines real-time adjustment of active control and energy dissipation of passive control, constructs a multi-stage vibration control strategy, adapts to different vibration environments, and improves the stability and safety of the rail system.

The invention relates to a method for controlling a voice coil of a loudspeaker, comprising the steps of providing a magnetic circuit with an air gap, providing a voice coil suspended in the air gap, and applying an audio signal to the voice coil to move the voice coil along an axis of motion. The voice coil comprises a middle voice coil section, an upper voice coil section, and a lower voice coil section, arranged on the respective sides of the middle voice coil section. A middle control signal is supplied to the middle voice coil, and an upper rectified control signal, which attenuates a first current direction, and a lower rectified control signal, which attenuates a second current direction, are supplied to the upper and lower voice coil sections, respectively.The invention further relates to a voice coil control system and a loudspeaker with a voice coil control system.

The application belongs to the technical field of communication automation, and discloses a communication automation link cooperative optimization regulation and control and self-recovery intelligent system and an application method. The application breaks through the technical bottleneck of traditional communication automation, i.e. "link isolated scheduling, time delay passive control and fault fuzzy disposal", and significantly improves the link cooperative efficiency, time delay prediction accuracy, fault tracing accuracy and self-recovery timeliness through modeling innovation and efficiency design, so as to adapt to the communication automation scenes such as industrial internet, smart grid, remote medical treatment and vehicle networking which have high requirements on link cooperation, time delay controllability and fault tracing capability. The application has clear innovation points and no repetition with the existing invention, and fills the gap of communication automation link cooperative optimization, time delay prediction regulation and control and fault tracing self-recovery.

Methods and systems for controlling one or more pumps of a heart-lung-machine. An illustrative method may comprise receiving an actual flow rate of a pump, determining the actual flow rate is from a primary pump, determining an available amount of the actual flow rate of the primary pump that is available to one or more subordinate pumps, comparing the available amount of the actual flow rate of the primary pump to a sum of set flow rates of the one or more subordinate pumps, and operating the one or more subordinate pumps in a proactive control mode or a reactive control mode.

The application provides a split-acting oil-gas active suspension and a control method. The suspension comprises a suspension controller, a hydraulic actuator, a motor actuator electrically connected with the suspension controller, and a sensor for collecting motion state information of the suspension system, the motor actuator is connected with the hydraulic actuator through a hydraulic oil pipeline; the suspension controller outputs a control signal to control the motor actuator according to a certain control algorithm based on the sensor output signal, the motor actuator drives the hydraulic actuator to act through hydraulic transmission, thereby realizing active control of the suspension system. The application retains the hydraulic actuator of the traditional passive oil-gas suspension, can reduce the cost and difficulty of the active modification of the passive oil-gas suspension. In the driving condition of good road condition, the suspension system is passively controlled by the hydraulic actuator by stopping the control of the servo motor, so as to reduce the power consumption and achieve the purpose of energy saving.

The invention relates to the technical field of wire drawing machine tension control, and particularly discloses an adjustable tension control mechanism for a wire drawing machine, which comprises a winding device positioned in a rack, and the rack is also provided with a guide assembly and a control assembly, the guiding assembly comprises a guiding seat assembled on the rack in a sliding mode, a guiding rod assembled on the guiding seat in a sliding mode and a guiding wheel arranged on the guiding rod, the wire is wound around the winding device after being guided by the guiding wheel, and the guiding wheel can be driven to move relative to the winding device when the guiding seat and the guiding rod move so as to adjust the tension of the wire; the control assembly comprises an active control piece connected with the guide seat and used for adjusting the position of the guide seat, and a passive control piece assembled on the guide seat, connected with the guide rod and used for adjusting the position of the guide rod. The adjustable tension control mechanism for the wire drawing machine has the effect of improving the winding quality.

The invention relates to the technical field of vehicles, and provides a vehicle atmosphere lamp control method and system based on voice emotion recognition. The method comprises the following steps: acquiring voice data of a driver in real time; extracting emotional feature parameters based on the voice data; the emotion feature parameters at least comprise linear features and nonlinear features; inputting the emotion feature parameters into a pre-trained emotion recognition model, and calculating the emotion type of the driver through a hybrid algorithm in the emotion recognition model; and based on the emotion type of the driver, through a preset emotion type and atmosphere lamp mapping relation, obtaining a corresponding atmosphere lamp control parameter so as to control the atmosphere lamp to work. The passive control problem that an existing automobile atmosphere lamp cannot be automatically adjusted according to the real-time emotional state of a driver and passengers is solved.

The application discloses a dual-working-medium self-suction type ORC composite extended range / mixed motion power system and belongs to the field of internal combustion engine waste heat recovery and vehicle power. The system comprises a dual-working-medium circuit, dual-heat-source heat exchange, self-suction type ORC power generation, pure mechanical control, condensation backflow and power generation modules; the main working medium is water and antifreeze, the secondary working medium is a low-boiling-point refrigerant, the dual circuits share power generation, condensation and power generation units, and are automatically switched by a temperature-sensing rotary air distribution valve in a pure mechanical mode to cover all working conditions. The system adopts a dual-cavity self-suction structure and a flywheel inertia to realize a pump-free self-suction cycle, a water jacket is provided with a membrane cavity for separation and a temperature-sensing bypass valve to balance heat dissipation and heat absorption, and a tail gas heat exchange is provided with a buffer structure and a pressure stabilizing bag to resist cold and hot impact and use ordinary materials. The system is purely mechanically and passively controlled, does not need complex electric control and has no additional energy consumption. The total power generation efficiency of the extended range device reaches 48% to 51%, the comprehensive efficiency of the mixed motion reaches 52% to 58%, the structure is extremely simple, the cost is low, the reliability is high, mass production is easy, and the system is suitable for extended range and mixed motion vehicles.

The invention relates to the technical field of offshore wind power, in particular to a vertical axis fan blade contraction control device and method, which comprises a main barrel, a sliding block, a blade supporting rod piece and a connecting rod piece, by arranging the sliding block capable of being passively closed, the vertical axis fan can automatically contract under the severe marine environment so as to control the rotating speed, damage to the vertical axis fan is avoided, and safe operation of the vertical axis fan is achieved. Through an active or passive control mechanism, the radial distance between the fan blades and the main barrel is dynamically adjusted, so that the rotating speed of the fan is adjusted, and the fan can be kept to operate safely and efficiently under the severe wind condition. And a sliding block capable of being passively closed is arranged, so that the rotating speed of the vertical-axis fan can be automatically contracted in a severe marine environment, and the vertical-axis fan is prevented from being damaged. And an active traction rope is arranged, so that the sliding block can be actively tightened, and the safety of the vertical shaft fan in the operation process is improved. The technical problem that the rotating speed of a vertical axis fan cannot be effectively regulated and controlled can be solved.

This invention discloses a hydraulic control system and method for a deep-sea hoisting hook-type active-passive wave compensator, belonging to the field of hydraulic control technology for deep-sea engineering equipment. The system includes actuators, passive control, active control, buffer control, an accumulator, and a power module. The actuator consists of a passive wave compensation cylinder and symmetrically arranged active wave compensation cylinders. The passive cylinder bears the main load and achieves passive compensation via a gas-loaded accumulator. When the compensation accuracy is insufficient, the active control module controls the active cylinder through a servo valve based on wave detection signals to achieve high-precision composite compensation. The buffer control module provides throttling buffer protection at the end of the passive cylinder's stroke. The accumulator module uses a radar sensor to monitor the piston position and adapts to the optimal compensation stroke for different water depths. The power module provides a high-pressure oil source. This invention combines low energy consumption and high precision, adapts to changes in water depth, switches smoothly, and is easy to maintain, making it suitable for complex sea conditions such as deep-sea hoisting and installation of seabed facilities.

The invention discloses a control method and system for an integrated data intelligent heat preservation box. The control method comprises the steps that the temperature, humidity, load current and phase change energy storage material state data in the heat preservation box are collected through a data driving virtual sensor platform; calling the load energy consumption time sequence variation prediction model to generate an energy consumption change curve in a future preset time period; based on the curve and the collected data, a phase change energy storage temperature control adjusting algorithm is started to calculate heat release or heat absorption rate adjusting parameters of the phase change material; calling an isolated forest energy consumption anomaly detection algorithm to compare real-time and theoretical current data to identify energy consumption anomaly; temperature control algorithm parameters are adjusted when abnormity occurs, and operation parameters of a temperature control actuator are corrected in combination with sensor feedback; and repeating step dynamic optimization to realize continuous control, wherein the steps comprise refining operations such as multi-dimensional data association and abnormal feature recording. The system comprises multiple units for cooperative work, the problems of data fragmentation and passive control of a traditional heat preservation box are solved, and the temperature control precision and the energy consumption efficiency are improved.

The invention provides a multifunctional integrated gearbox shell which comprises a shell body, and an inner cavity of the shell body is divided into a main box area and an auxiliary box area through an integrally-formed partition plate. A main box gear is arranged in the main box area, and an auxiliary box gear is arranged in the auxiliary box area. A top oil storage pool and a bottom oil storage pool are arranged in the auxiliary box area. A backflow hole and a first overflow hole which are communicated with the main box area and the auxiliary box area are formed in the partition plate, the backflow hole is located in the bottom of the partition plate, and the first overflow hole is located in the middle of the partition plate. The bottom oil storage pool, the backflow hole and the overflow hole are integrated on the shell body, passive control over unequal-height liquid levels of lubricating oil in the main box area and the auxiliary box area is achieved, the main box area stably maintains the low oil level under the normal rotating speed, the auxiliary box area stably maintains the high oil level under the normal rotating speed, main box gear oil stirring losses are eliminated, meanwhile, auxiliary box gears are prevented from generating oil stirring losses, and the service life is prolonged. The transmission efficiency of the gearbox is improved, and operation risks such as temperature control response delay and part failure do not exist.

The application relates to the field of traffic supervision, and provides a smart city tunnel traffic emergency supervision Internet of Things large model system and method, the method comprising the following steps: constructing a fusion feature vector of a vehicle in a target tunnel according to multidimensional data of the target tunnel; determining an abnormal event according to the fusion feature vector and congestion data of the target tunnel; predicting an upstream congestion condition of the target tunnel according to the abnormal event, the congestion data and surrounding traffic flow data of the target tunnel; and generating a signal control instruction comprising a passing time length according to the upstream congestion condition, the signal control instruction being configured to control a target signal lamp to maintain a target state for the passing time length, the target signal lamp being a signal lamp on a key road section in a direction leading to the target tunnel. The application can realize a leap from passive control of 'getting stuck at the source' to active dredging of 'avoiding the congestion point', provide clear and feasible alternative solutions for drivers, and significantly improve the overall passing efficiency and emergency disposal capability of a regional road network.

The application provides a sand suction and filling multi-arm cooperative control algorithm based on kinematics and dynamics coupling, comprising the following steps: S1: water dynamic disturbance field full working condition data acquisition and feature library construction; S2: multi-arm kinematics modeling and unified mapping of working space; S3: construction of a multi-arm kinematics-dynamics coupling model embedded with a water dynamic disturbance adaptive compensation term; S4: multi-arm task-dynamics coupling distribution based on an improved parasite-prey algorithm; S5: trajectory-task bidirectional coupling planning based on a fractional order pseudospectral method; S6: multi-arm-filling cooperative closed loop control based on a port-controlled Hamilton fractional order passive control; and S7: real-time acquisition of sand suction and filling parameters and full system closed loop feedback. Through deep coupling modeling of kinematics and dynamics and bidirectional cooperative optimization of core control algorithms, the application realizes high-precision, high-stability and high-efficiency cooperative control of multi-arm sand suction and filling operation in a dynamic water environment.

This invention belongs to the technical field of micro-vibration control and discloses a three-level micro-vibration isolation system and method combining active and passive vibration control. The system includes a controlled structure, an active control unit, and a passive control unit. The active and passive control units work together to form three-level micro-vibration control for the controlled unit. The passive control unit includes a first passive control module and a second passive control module. The first passive control module includes a shell, a negative stiffness damper, and a suspension cable. The suspension cable connects the controlled structure and the shell. The suspension cable, damper, and controlled structure together form a long-period pendulum structure to filter out mid-to-high frequency micro-vibrations relative to its oscillation period. The second passive control module provides vertical passive vibration isolation to filter out three-dimensional low-frequency micro-vibrations. The active control unit compensates for vibrations caused by ground-level micro-vibrations. This invention solves the problem of low-frequency and high-frequency micro-vibrations in space optical equipment.

This application discloses an oil-gas separator, including a cylinder with an inlet end and an outlet end; and at least one reinforcing ring fixedly sleeved on the outer peripheral wall of the cylinder. The reinforcing ring is configured to increase the local stiffness of the cylinder, thereby adjusting the overall modal frequency of the cylinder to above a preset threshold, so that the natural frequency of the cylinder avoids the excitation frequency of the compressor. This application eliminates resonance noise by setting a reinforcing ring on the outer periphery of the cylinder and utilizing the principle of passive structural control. The reinforcing ring significantly increases the local stiffness of the shell, forcing the overall modal frequency of the oil-gas separator to jump above the main excitation frequency band of the compressor, thus cutting off the physical conditions for resonance at its source and overcoming the defect of low absorption efficiency of traditional sound-absorbing cotton for low-frequency vibration. This solution directly modulates the noise radiation source mechanically, effectively suppressing the sound radiation efficiency of the shell. At the same time, the optimized structural parameters eliminate the planar modal resonance of the additional structure itself, achieving substantial improvement in noise across the entire frequency band.

This invention relates to the field of control technology and discloses a method and system for optimizing process parameters in rice cake production. The method includes: real-time detection of the viscoelasticity of rice paste in the cooking zone; analysis of the non-equilibrium region of starch gelatinization in the cooking zone based on the phase hysteresis corresponding to the viscoelasticity; calculation of the difference in water migration rate between adjacent non-equilibrium regions; injection of steam pulse disturbance into the region with the largest difference in water migration rate, while simultaneously detecting the propagation response trajectory of surface microcracks in the rice paste; locating the structural stress concentration area of ​​the surface microcracks based on the curvature abrupt change point of the propagation response trajectory; and dynamically correcting the pressure gradient parameters of the roller press and the temperature drop rate parameters of the cooling zone in the cooking zone according to the spatial coupling degree between the structural stress concentration area and the non-equilibrium region. This invention can solve the technical transformation from passive control to active optimization, improving the uniformity, textural stability, and yield of rice cake production.

This invention discloses a waste heat recovery and energy storage system for kilns, belonging to the field of industrial waste heat energy conservation technology. The system includes interconnected waste heat collection and processing modules, a thermal energy storage module, an intelligent switching control module, and a heat energy supply module. This invention provides differentiated treatment of combustion flue gas containing porcelain powder and adhesive decomposition impurities from clean cooling hot air, avoiding equipment pollution and cascaded waste of heat energy. It employs a three-dimensional staggered refractory brick heat storage body with a labyrinthine channel to adapt to fluctuating waste heat conditions in electric porcelain kilns. Simultaneously, it abandons the traditional passive control mode, constructing a full-cycle waste heat prediction and compensation model to dynamically adjust the cross-sectional area of ​​the air duct, achieving forced interception of peak waste heat and full recovery of low-grade waste heat. This invention solves the defects of traditional electric porcelain kiln waste heat recovery, such as disordered operation, delayed control, large heat fluctuations, and low waste heat utilization rate. It can stably supply process heat for the drying and preheating processes of electric porcelain blanks, resulting in significant energy-saving benefits and practicality for production.

The invention discloses an ethylene low-temperature pipeline heat insulation protection state evaluation and control method, and relates to the technical field of pipeline heat insulation protection. According to the invention, the problems of incomplete abnormal event monitoring, inaccurate damage assessment, single risk judgment and passive control response in the prior art are solved. The method is characterized in that multi-sensor high-frequency diagnosis and infrared thermal image synchronous acquisition are triggered through abnormal vibration to form event full-dimension data; extracting features and reversely calculating thermal insulation layer performance parameters by using a digital twinborn model; fusing a multi-dimensional analysis result to generate a comprehensive evaluation report with a risk level and confidence; and executing grading response according to the risk grade, and when a preset grade is reached, automatically generating an operation parameter adjustment or active thermal compensation control instruction based on multi-objective optimization. The method is used for realizing accurate evaluation and active safety control of the heat insulation state of the ethylene low-temperature pipeline.