934 results about "Operational reliability" patented technology

The invention relates to a power distribution network abnormal state intelligent identification method based on unmanned aerial vehicle routing inspection, and the method comprises the following steps: S1, obtaining power distribution network routing inspection related data, including asset main data, historical operation and maintenance data and environment constraints; s2, constructing the digital twinning of the power distribution network based on the power distribution network inspection related data, and obtaining the mapping from the equipment ID to the spatial pose and parameters; s3, generating a risk heat map based on historical defects and environmental risk scoring; s4, constructing an equipment-geography-working condition knowledge graph, and generating inspection targets and priorities according to line sections in combination with mapping from equipment IDs to spatial poses and parameters and a risk heat map to obtain a task package; and S5, performing multi-target route inspection according to the task package, the risk heat map and the mapping from the equipment ID to the spatial pose and the parameter, and intelligently identifying the abnormal state of the power distribution network. The operation reliability of the power distribution network is effectively improved, and the power supply quality is improved.

The invention discloses a dynamic closed-loop management method for bridge-shaped contact performance, and relates to the technical field of power system protection. The method comprises the following steps: S1, a dynamic sensing process: acquiring multi-source dynamic parameters of a bridge-shaped contact in a non-intrusive mode; s2, a quantitative evaluation process: fusing the multi-source dynamic parameters and the static parameters, and calculating a health index or a health level of the contact through a preset model; s3, adaptively optimizing the process, dynamically adjusting the closing energy or protection parameters of the circuit breaker according to the health state, and compensating the performance change of the contact; and S4, a predictive maintenance process: performing trend extrapolation based on the historical data of the health index, predicting the residual life and generating a maintenance suggestion. The processes are sequentially connected and cyclically iterated to form dynamic closed-loop management, so that the problems of one-sided parameter sensing, inaccurate evaluation, fixed parameters and maintenance lag in the prior art are solved, the operation reliability of the bridge-shaped contact is improved, the service life of equipment is prolonged, and the operation and maintenance cost is reduced.

The invention discloses a scraper conveyor middle trough production line operation state monitoring method based on digital twinning, and belongs to the technical field of industrial intelligent manufacturing. The method comprises the following steps: constructing digital twin bodies in one-to-one correspondence with physical production line elements; establishing a real-time data driving channel between the digital twin and the physical elements; based on the channel, driving the digital twin to synchronously map the real-time operation parameters, and generating a virtual operation state of the production line; based on the virtual operation state, performing time sequence deduction on the processing flow in the digital twin according to the processing technology logic and the equipment performance parameters to obtain a production line pre-estimation state of a future time point; and comparing the parameters in the pre-estimated state with a preset threshold range to generate prediction information. According to the invention, real-time data driving and bidirectional interaction of the physical production line and the virtual model are realized, the problems of data isolation and feedback lag of a traditional monitoring mode are overcome, the prediction capability is provided, and the operation reliability and intelligent management of the production line are effectively improved.

The invention relates to the technical field of generator set intelligent control, and discloses a generator set intelligent control method and system, and the method comprises the steps: obtaining the sensor data and vibration signals of a generator set; obtaining a corrected frequency characteristic value according to sensor data screening, denoising and frequency characteristic correction; generating and iteratively updating a control decision instruction sequence according to the real-time change of the vibration signal and the corrected frequency characteristic value to obtain a system stability index; and combining system stability index feedback adjustment to obtain a control decision reliability index. The method can solve the problem of noise interference under a dynamic working condition, realizes fault early warning, parameter optimization and system stability, and improves energy efficiency and operation reliability.

The invention discloses a spiking neural network driven robot dynamic adaptive control system, which relates to the technical field of robot control, and comprises seven modules: an environment sensing module which integrates various sensors and collects and transmits environment, attitude and interaction information; the signal preprocessing module processes data through composite filtering and feature extraction; the spiking neural network modeling module constructs a three-layer structure and performs training based on a fusion learning rule; the dynamic decision output module converts the pulse signal into a control instruction and adjusts gain; the actuating mechanism driving module drives the actuator to act; the state feedback monitoring module monitors and feeds back motion parameters and system states; and the adaptive optimization module optimizes the network and module parameters based on feedback data, and dynamically matches the environment. The control precision and the response speed of the robot in a complex environment are improved, the adaptive capacity is enhanced, the operation reliability and safety are guaranteed through multi-module cooperation, and the application scene is expanded.

The invention relates to the technical field of industrial equipment fault detection, and discloses a generator iron core lamination equipment fault detection method and system, and the method comprises the steps: obtaining an original vibration signal, and obtaining a first vibration data set through synchronous calibration and feature extraction; a second vibration data set is obtained through time-frequency analysis, decomposition and denoising; constructing a model to enhance the periodic weak impact signal, and obtaining an enhanced signal feature set; performing matching quantification with a preset reference frequency template library, and determining a potential fault signal distribution range; and when the threshold value is exceeded, a fault feature data set is obtained through depth feature extraction, a hyperplane decision model is constructed based on the fault feature data set, and a feature local evolution trend is analyzed to output an early warning result. The method can accurately capture early fault signals, reduces the missing detection and false detection rate, and improves the operation reliability of equipment.

The invention discloses an angle-variable and self-revolution wafer base device, and belongs to the technical field of wafer bases, the angle-variable and self-revolution wafer base device comprises a revolution base, a gear carrier is fixedly connected to the center of the top of the revolution base, and a base is arranged above the gear carrier. According to the cooling device, an external liquid supply device conveys cooling water into the connecting base through a cooling water inlet pipe, inclined blades in the connecting base drive a driving shaft and a double-end protruding block to rotate, a sliding block drives an annular gear and a cooling disc to rotate through a rack, and the rotating cooling disc centrifugally throws out the cooling water; a uniform and dead-corner-free cooling water curtain is formed, the rotation shaft and the adjusting shaft are completely wrapped, the cooling uniformity of the peripheral side of the shaft body is ensured, stable and efficient heat exchange is achieved, sprayed cooling water can cool the revolution seat and the gear carrier at the same time, the influence of the high temperature in the reaction cavity on the device is reduced in an auxiliary mode, and the reaction efficiency is improved. And the operation reliability and the overall performance of the device are obviously improved.

The invention provides a precise air floating main shaft based on small hole throttling. The precise air floating main shaft comprises a cylinder barrel, a shell, a rotating shaft, a front radial air floating bearing, a rear radial air floating bearing, a front axial thrust air floating bearing, a rear axial thrust air floating bearing, a driving motor, a broach mechanism and various sensors. A reciprocating type spiral groove is formed in the outer circle of the cylinder barrel and forms a spiral cooling water channel with the shell, and the rear end cover is integrated with an air inlet interface, an air outlet interface, a cooling water interface and an air control interface; compressed gas is throttled through an axial gas path and a small hole to form a high-rigidity gas film to support the rotating shaft, and cooling water flows in the spiral water path to take away heat; the control module is based on rotating speed, displacement, temperature and pressure signals, adopts a thermal-mechanical coupling model and a predictive control algorithm, adaptively adjusts air supply pressure and cooling water flow, and is suitable for semiconductors and ultra-precision machining equipment. Through the collaborative design of the small hole throttling air bearing, the reciprocating type spiral cooling water channel and multi-sensor intelligent control, the rigidity, the heat stability and the operation reliability of the main shaft are greatly improved, and the high-precision ultra-precision machining device is suitable for long-term high-rotating-speed and high-precision ultra-precision machining.

The utility model relates to the field of cases, in particular to a case with a quick-change air cooling module, which comprises a case body internally provided with a mounting cavity; the heat dissipation flow channel is arranged in the box body, is provided with an air inlet and an air outlet, and comprises a fan module mounting cavity, and a heat dissipation cavity opening allowing a fan module to be inserted and pulled is formed in the side wall of the fan module mounting cavity; the fan module is assembled in the fan module mounting cavity in a pluggable mode and comprises a mounting frame and a fan fixedly connected to the mounting frame, an exhaust port is formed in the side wall of the mounting frame, and the exhaust port communicates with the downstream of the heat dissipation flow channel; the problems that an existing fan is tedious in maintenance process, long in downtime and the like are solved in a targeted mode, convenience, high efficiency, safety and universality of fan maintenance are achieved through tool-free disassembly and assembly, the maintenance time is shortened, cost and safety risks are reduced, and the strict requirements of aviation or military equipment for equipment operation and maintenance convenience and operation reliability are met.

The invention discloses an axial magnetic flux motor which comprises a rotor assembly and a cooling assembly. The cooling assembly is arranged between the two rotor discs of the rotor assembly in the axial direction; a cooling air channel penetrating in the radial direction is formed in the cooling assembly, rotor air channels penetrating in the radial direction are formed in the sides, facing the cooling assembly, of the two rotor discs, and the cooling air channel is correspondingly communicated with the rotor air channels arranged on the two sides in the axial direction to form two circulating air channels. And high-temperature airflow in the rotor air duct and cooling airflow in the cooling air duct realize continuous convection and circulating heat exchange through the circulating air duct. Through a double-air-path circulating cooling structure, the rotor assembly is subjected to air-cooling heat dissipation, heat generated in the operation process of the rotor assembly is efficiently taken away, the working temperature of the rotor assembly is reduced, the risk of permanent magnet demagnetization caused by high temperature can be restrained, the stability of the output torque of the motor and continuous improvement of the operation efficiency are ensured, and the service life of the motor is prolonged. And the problem of performance degradation caused by temperature rise is avoided, so that the working reliability of the axial magnetic flux motor is improved.

The invention provides a safe starting method and device of a programmable logic controller, a PUF circuit, a starting control unit and a password authentication unit are integrated on a main controller chip of a PLC system, and the method comprises the following steps: responding to power-on of the PLC system, activating the PUF circuit and generating a device root key; the starting control unit activates and operates the starting state machine; under the control of the starting state machine, the starting control unit executes the following step-by-step verification and loading processes: reading a code of a first-stage boot loader from a boot read-only memory of the PLC system, and checking; in the first stage, the boot loader reads encrypted firmware data and checks the encrypted firmware data; loading an operating system component or an application program of the PLC system, and checking; and if the inspection is passed, entering an operation state, and executing a corresponding industrial control task by the PLC system. Firmware tampering and unauthorized code execution are effectively resisted, and the starting safety and the operation reliability of the PLC system are comprehensively enhanced.

The invention belongs to the technical field of valves, and discloses a single-action pneumatic actuator control system which comprises a gas supply gas circuit, a pneumatic pilot valve, a first electromagnetic valve, a pilot loop and a delayed discharge loop. And the delayed discharge loop is configured to discharge the air pressure in the control air cavity, and after a preset time, the air pressure is gradually reduced to be below a set value so as to cut off the pneumatic pilot valve. During power failure in a whole platform range, the time-delay discharge loop can enable the whole control system to automatically switch into a pure pneumatic time-delay mode, so that the situation that the BDV immediately enters an open state due to power loss of the first electromagnetic valve is avoided, and the environmental adaptability and long-term operation reliability of the control system under extremely severe environments such as an ocean platform and flammable and explosive environments are remarkably improved; the safety performance is improved.

The invention provides a condenser type refrigeration cycle intelligent adaptation control method and system, and relates to the technical field of refrigeration. The method comprises the steps that environment state parameters are obtained, the environment frost point temperature is calculated, and an altitude correction factor representing the air side heat exchange capacity is calculated; executing boundary contraction transformation on a preset compressor operation envelope based on the altitude correction factor, and determining an allowable condensing pressure upper limit; an evaporator temperature response sequence is monitored, the time domain integral cumulant of the temperature response sequence relative to the environment frost point temperature is calculated, and the allowable evaporation temperature lower limit is dynamically increased based on the cumulant; constructing a target operation domain according to the allowable condensation pressure upper limit and the allowable evaporation temperature lower limit; and determining a current operation working point, and adjusting the control variable to enable the operation working point to fall into the target operation domain. The safety of the condensation side and the frost prevention stability of the evaporation side can be considered under the high-altitude and complex environment working conditions, and the continuous operation reliability of refrigeration circulation is improved.

The utility model relates to the field of conducting rings, in particular to a conducting ring for an oil cooling shaft, which comprises a conducting ring casting, the conducting ring casting is of an annular structure, the inner wall of the conducting ring casting is fixedly connected with a mounting ring, carbon fiber yarns which are arranged at equal intervals are mounted on the mounting ring, and shaft static electricity is transmitted to the conducting ring casting through the carbon fiber yarns. According to the utility model, shaft static electricity generated by the motor rotating shaft is transmitted to the conductive ring casting by using the carbon fiber yarns and is further transmitted to the motor shell, so that the shaft static electricity is effectively prevented from being accumulated on a bearing or other conductive parts, the risks of local overheating and bearing abrasion are reduced, the operation reliability of the motor is remarkably improved, and the service life of the motor is remarkably prolonged. Through the arrangement of the rubber oil baffle plate, not only is excessive engine oil prevented from being in contact with the carbon fiber yarns, but also the rubber oil baffle plate is convenient to replace and clean through the detachable locking nut and positioning block structure, and the maintenance cost and time are reduced.

The invention discloses a port area flexible load millisecond-level cooperative suppression method based on magnetic flux jump prediction, and the method comprises the steps: obtaining the external vibration and electrical data of a transformer, combining the Bayesian inversion of physical constraint, and reconstructing an internal three-dimensional magnetic flux field; based on time sequence evolution of the magnetic flux field, a dual-mode self-adaptive prediction algorithm is adopted, and a magnetic flux jump early warning vector containing jump time, amplitude and position is generated; and according to the early warning vector, through a multi-layer cooperative control strategy of time sequence decoupling, a control instruction for the flexible load of the harbor district is generated and executed. Advanced early warning and millisecond-level active suppression of the potential magnetic saturation risk are realized, and the operation reliability and equipment safety of a harbor district power distribution system are improved.

The invention discloses a data center machine room temperature field equalization method based on a multi-scale model learning strategy. Fusing the equipment tolerance, the refrigeration system performance and the environmental thermodynamic boundary to construct a dynamic safe operation boundary; a machine room-cabinet-equipment multi-scale reverse model is constructed based on a physical guidance neural operator, and backstepping from observation of a temperature field to an optimal control strategy is realized; the method comprises the following steps: dynamically dividing a machine room into a plurality of logic control areas, deploying a reinforcement learning agent for each area, deciding and adjusting the air supply speed under the constraint of a safety boundary, and meanwhile, learning the minimum feasible air speed on line to optimize energy conservation; and when temperature abnormity which cannot be processed by local control is detected, generating and executing a global coordinated regulation and control instruction according to the global temperature field data and an analysis result of the multi-scale model. According to the method, on the premise of guaranteeing the safety of equipment, the temperature field of the data center is subjected to refined and self-adaptive balanced regulation and control, and the energy efficiency and the operation reliability of a refrigeration system are remarkably improved.

The invention discloses an EPB motor control system and control method based on H-bridge driving, and belongs to the field of vehicle braking, the EPB motor control system comprises a power module, a control module, an H-bridge driving module and an EPB motor, the control module is connected with the EPB motor through the H-bridge driving module, the EPB motor control system is further integrated with a self-checking module, and the self-checking module is used for collecting working current and voltage signals of the EPB motor in real time; collected data are fed back to the control module; and the control module is configured to receive an external instruction and feedback data of the self-checking module, dynamically correct the duty ratio of the PWM signal output to the H-bridge driving module through a closed-loop adjustment algorithm, and realize closed-loop control of the rotating speed and the torque of the EPB motor. By the adoption of the EPB motor control system and method based on H-bridge driving, closed-loop precise control over the rotating speed and torque of the EPB motor is achieved, meanwhile, a multi-dimensional safety protection system is constructed, and control precision and operation reliability are both considered.

The invention discloses a rotor bearing cooperative temperature control method, which comprises the following steps of: acquiring rotor bearing end face hot spot region information, millimeter-level spatial resolution local temperature field distribution information and vibration spectrum and local temperature information, and fusing to generate rotor bearing global temperature field model information; according to the rotor bearing global temperature field model information, a double closed-loop control system is operated or a phase change microcapsule coolant is triggered; when the double-closed-loop control system is operated, the viscosity and the flow of lubricating oil are adjusted, and / or the flow of cooling water is dynamically distributed through a variable nozzle array, and operation data of the double-closed-loop control system are output; when the phase change microcapsule coolant is triggered, the rotor bearing is subjected to point-shaped cooling; and running data of the double-closed-loop control system is subjected to deep reinforcement learning dynamic optimization and fault mode knowledge graph pre-judgment and then is transmitted back to the double-closed-loop control system. The operation reliability and the service life of the rotor bearing can be remarkably improved.

The invention discloses a distributed model prediction control method for an offshore front-end speed regulation type wind turbine generator, and belongs to the technical field of new energy power generation. According to the method, an overall control task is decomposed into three parallel subsystems including a variable pitch subsystem, a hydraulic variable torque speed regulation subsystem and an excitation subsystem, and local discrete prediction models are established respectively. And in each sampling period, rolling optimization of each subsystem is executed in parallel, and future prediction tracks of the rotating speed and the terminal voltage of the generator are introduced as global consistency variables. And by constructing an augmented Lagrangian cost function based on an alternating direction multiplier method and performing iterative solution, driving each local prediction trajectory to converge to a globally consistent optimal trajectory. And finally, outputting a first instruction of an optimal control sequence obtained after iterative convergence to each execution mechanism, and realizing cooperative control of the three subsystems, thereby rapidly and smoothly satisfying frequency and voltage synchronization conditions at the same time before grid connection, effectively inhibiting coupling interference and wind speed fluctuation, and improving grid connection quality and operation reliability.

The invention relates to a four-degree-of-freedom model supporting mechanism used in a severe environment and a wind tunnel test device in the technical field of wind tunnel tests. The invention discloses a four-degree-of-freedom model supporting mechanism used in a severe environment. The four-degree-of-freedom model supporting mechanism comprises a supporting mechanism body, a composite heat-proof mechanism and a thermal deformation compensation assembly. The supporting mechanism body is provided with a driving mechanism for adjusting the pose of the tested model. The composite heat-proof mechanism comprises a cooling cover, an air supply assembly, an exhaust pipe and a cooling pipe. The thermal deformation compensation assembly comprises a pre-tightening pull rod and a plurality of spring assemblies. Through the overall structural design and optimization, an extremely stable bearing system is constructed, and an accurate and stable attitude reference is provided for a test. In addition, through the design of the composite heat-proof mechanism, a low-temperature island is constructed for core driving and transmission parts, pneumatic heat can be effectively isolated, and the operation reliability of precise elements such as a motor at high temperature is ensured.

The invention discloses a centrifuge full life cycle intelligent analysis and operation and maintenance method. The method comprises the following steps: constructing a health scoring model which is based on an SAE-SOM neural network and comprises wavelet denoising and future parameter prediction functions; constructing an equipment life prediction model; a data set obtained from detection equipment is subjected to problem sample screening and normalization operation, and then a feedforward neural network is trained. And the hyper-parameter of the feedforward neural network is determined through a genetic algorithm. And a fault tracing model is constructed. The system is composed of a feature extraction network, a middle layer, a relation measurement network and a fault classification network. And establishing an equipment operation environment cross validation module. According to the invention, through mutual cooperation of the equipment health assessment module, the whole machine life estimation module, the fault alarm module, the early warning and traceability module, the operation environment cross validation module and the warning module, fusion analysis is carried out on key operation parameters of the centrifugal machine and external environment data; the method can be widely applied to water plants and other complex industrial scenes with high requirements for the operation reliability of key equipment.

This invention discloses a highly generalizable method for diagnosing open-circuit faults in multi-transistor converters of motor drive systems. This method addresses open-circuit faults in power devices caused by overcurrent surges, poor heat dissipation, and other factors, preventing damage to the motor and power grid equipment caused by output current distortion and increased torque ripple. The method analyzes the retention characteristics of the positive and negative regions of the three-phase stator current under steady-state operating conditions to construct a fault location function, and combines auxiliary variables to accurately distinguish between single-power and dual-power device open-circuit faults. This invention enables rapid location and accurate identification of complex open-circuit faults such as those in opposite phases on the same side or in opposite phases on opposite sides. It offers advantages such as high diagnostic accuracy, strong ability to distinguish mixed faults, and non-invasiveness, making it suitable for motor drive systems with high requirements for operational reliability and fault tolerance.

The invention provides a sliding guide rail system kinetic analysis method considering abrasion and creep, and relates to the technical field of numerical control machine tool kinetic analysis. The method comprises the following steps: firstly, establishing a multi-source wear model of a joint surface of an angular contact ball bearing, a lead screw-nut pair and a sliding guide rail, and constructing a creep degradation model of a bearing end cover bolt based on a Norton creep law; then correcting the elastic restoring force of the guide rail system by combining the evolution laws of the abrasion loss and the creep, and constructing a dynamic model of the bidirectional sliding guide rail system considering the comprehensive influence of the abrasion and the creep; bidirectional influence among abrasion, creep deformation and dynamic response is achieved, and finally the dynamic evolution law of the bidirectional sliding guide rail system under the long-term service condition is obtained. The method is clear in modeling process, high in universality and high in calculation precision, the degradation process of the dynamic characteristics of the guide rail system along with the service time can be truly reflected, and an effective theoretical basis is provided for numerical control machine tool service life prediction, structure optimization and operation reliability improvement.

The invention relates to the technical field of power grid management, in particular to a power transmission line lightning protection configuration method, which comprises the following steps: acquiring a lightning stroke transient simulation model based on line electrical and structural parameters; secondly, obtaining counterattack and shielding failure lightning-proof data through simulation in combination with the maximum lightning-proof bearing value; then, calculating corresponding counterattack and shielding failure trip-out rates based on the lightning-proof data; and finally, taking the two trip-out rates as core configuration indexes to generate and optimize a lightning protection configuration scheme of the power transmission line. According to the method, the lightning protection configuration is converted from experience driving to data driving through simulation quantitative evaluation, the lightning protection effect and economical efficiency can be scientifically and accurately balanced, and the lightning protection performance and the operation reliability of the line are effectively improved.

The application relates to the technical field of power electronics, and discloses a press-contact type IGBT device packaging structure optimization method and system. The method comprises the following steps: constructing an equivalent model of a press-contact type IGBT device; constructing a differential algebraic equation for uniformly describing the equivalent model of the press-contact type IGBT device and circuit port variables; converting the differential algebraic equation into a nonlinear algebraic equation group through time domain discretization, and constructing an iteration matrix with a global state vector as a derivation object according to a solving mode of the nonlinear algebraic equation group; performing low-dimensional subspace projection on the iteration matrix based on a Krylov subspace, and combining residual minimization to solve a linear subproblem of the iteration matrix, so that current uniformity characteristic results of the press-contact type IGBT device are obtained; and the packaging structure of the press-contact type IGBT device is optimized based on current density distribution reflected by the current uniformity characteristic results. The application can improve the current uniformity and operation reliability of the system.

The utility model discloses a kind of stator slot wedge, stator module and disc type motor, and stator slot wedge includes base piece and magnetically conductive part.Base piece is made of non-magnetic material, and base piece includes the main body section of being arranged in the slot of stator core and the inner edge section of being protrudingly arranged at the radial inner end of main body section;Magnetic conductive part is made of magnetic material, and magnetic conductive part is at least assembled in main body section and is inserted with the side slot wall of slot;The part of inner edge section away from main body section along radial direction is provided with main insertion part, main insertion part is used to and is inserted with the main matching part of being arranged in inner ring oil seal plate, and insertion is fixed by colloid adhesion, and the surface of insertion at least part is relatively axial and is inclined to extend.The utility model eliminates magnetic leakage hidden danger as far as possible, optimizes magnetic circuit, improves the operation reliability of complete machine and improves the operation efficiency of complete machine.

The utility model relates to the technical field of cartridge valve manufacturing, in particular to a cartridge valve with an anti-leakage function. According to the technical scheme, the cartridge valve with the leak-proof function comprises a valve sleeve, a valve element, a sealing ring, a first elastic piece and the like, the valve element is connected into the valve sleeve in a sliding mode, a liquid inlet hole is formed in the bottom of the valve sleeve, a plurality of through holes are formed in the lower portion of the valve sleeve in an annular array mode, and the through holes are all connected and communicated with the liquid inlet hole. The lower portion of the valve sleeve is fixedly sleeved with a sealing ring, and a first elastic piece is connected between the valve sleeve and the valve element. The cartridge valve is installed on the valve block through the threaded groove, the sealing ring and the sealing washer enhance the sealing performance, and when the device operates, hydraulic oil pushes the valve element to move upwards and flows out through the through hole; when the cartridge valve is closed, the valve element moves downwards to close the liquid inlet hole, tight contact is ensured, the sealing performance and the operation reliability of the cartridge valve are remarkably improved, and the maintenance requirement is reduced.

The invention relates to the technical field of gas turbine control, in particular to a gas turbine multi-parameter cooperative control and dynamic safety adjusting system and method. According to the system, PID outputs of high-pressure compressor rotating speed tracking, power turbine rotating speed tracking, active power tracking and parameter limit control loops are generated in parallel through a multi-parameter cooperative control module, and a minimum fuel demand signal is selected as a control reference based on competitive logic; through a dynamic safety adjusting module, a dynamic threshold curve linked with the inlet air temperature is preset, action allowance is superposed, and active intervention before parameter overrun is achieved; and through the fault tolerance module, the operation is maintained by adopting historical data fitting and an online compensation strategy when the sensor has a fault. According to the method, the problems of single parameter control response delay, insufficient limit protection, poor fault tolerance and the like are solved, and the control precision, response speed and operation reliability of the gas turbine under variable load, extreme environment and sensor abnormal working conditions are improved.

The invention discloses a medium-speed coal mill applied to the technical field of coal mills, which is characterized in that the air inlet position of primary air is dynamically changed through the matched arrangement of an air equalizing frame capable of periodically rotating and a circumferential air equalizing unit, so that the circumferential abrasion of a millstone is homogenized, the problem of serious local abrasion caused by fixed air inlet is effectively solved, and the service life of the millstone is prolonged. The service life of key components is obviously prolonged; furthermore, an air inlet mode is changed into a multi-point air inlet mode, so that the problem caused by an uneven wind field is further weakened, and the homogenization control effect of abrasion is better. In addition, the deviation monitoring unit integrated on the air uniformizing frame can early warn rotation accumulated deviation in real time, a maintenance signal is provided before air leakage of the air inlet possibly occurs, and the long-term operation reliability and stability of the air uniformizing system are guaranteed.

This application provides an axial fan and a computing device. The axial fan includes a first structural member and a second structural member. The first structural member has at least one limiting groove on its limiting surface for setting a limiting structure. The second structural member includes a limiting surface with multiple grooves spaced apart circumferentially thereon. Each groove includes a first groove wall and a second groove wall. When the limiting structure is subjected to a force from the first groove wall, it can retract towards the interior of the limiting groove and slide out of the current groove, switching to a retracted state. This allows the first and second structural members to rotate relative to each other around a first axis. When the limiting structure is subjected to a force from the second groove wall, it can remain in position abutting against the current groove, thus limiting the relative rotation between the first and second structural members. The axial fan of this application is less prone to reverse rotation, ensuring the heat dissipation effect of the computing device, balancing the economic benefits of the computing device, and improving operational reliability.