1841 results about "Control manner" patented technology

Various systems, computer-readable media, and computer-implemented methods of providing improved data privacy, anonymity and security by enabling subjects to which data pertains to remain “dynamically anonymous,” i.e., anonymous for as long as is desired—and to the extent that is desired—are disclosed herein. Embodiments include systems that create, access, use, store and / or erase data with increased privacy, anonymity, and security—thereby facilitating the availability of more qualified and accurate information. When personal data is authorized by data subjects to be shared with third parties, embodiments described herein may facilitate the sharing of information in a dynamically-controlled manner that also enables the delivery of temporally-, geographically-, and / or purpose-limited information to the receiving party. In one example, the disclosed techniques may be used to functionally separate geospatial information, such that it remains “dynamically anonymous,” i.e., anonymous for as long as is desired—and to the extent or degree that is desired.

The invention discloses a transient optimization control method based on a parallel system of a virtual synchronous machine and a grid-following converter. The method comprises the following steps: 1, constructing a topological structure of the parallel system of the virtual synchronous machine and the grid-following converter; 2, based on the topological structure, establishing a mathematical model of a parallel system, including an active loop equation and a reactive loop equation of a virtual synchronous machine and a phase-locked loop equation of a grid-following converter; 3, constructing an equivalent circuit, a network equation and a transient analysis model of the parallel system based on the mathematical model; 4, on the basis of the equivalent circuit, the network equation and the transient analysis model, determining conditions met by respective balance points of the virtual synchronous machine and the grid-following converter by using a balance point method; and 5, when the power grid has a fault, constructing a transient optimization strategy according to a condition satisfied by the balance point so as to realize transient optimization control of the parallel system. According to the method, the control modes of a virtual synchronous machine power loop and a grid-following type converter phase-locked loop can be improved, so that the transient stability of a parallel system converter is improved.

The present application relates to the technical field of vehicles, and provides a vehicle control method and apparatus, an electronic device, and a medium. The method comprises: on the basis of the transverse motion state quantity and the longitudinal motion state quantity of a first vehicle, solving for a tracking control problem for tracking a planning path and a planning speed, so as to obtain a first wheel steering angle control quantity and an expected acceleration of the first vehicle, wherein the first wheel is a front wheel or a rear wheel, the planning path comprises a reference value of the transverse motion state quantity of the vehicle at a series of time points in the future, and the planning speed comprises a reference value of the longitudinal motion state quantity of the vehicle at a series of time points in the future; obtaining the acceleration control quantity of the first vehicle on the basis of the expected acceleration of the first vehicle and the actual acceleration thereof; and controlling the first vehicle on the basis of the first wheel steering angle control quantity and the acceleration control quantity of the first vehicle. In the present application, vehicle control is carried out in a transverse and longitudinal combined tracking control mode, so that the speed tracking accuracy can be improved as much as possible while the path tracking accuracy is ensured.

The invention relates to the technical field of lime kiln control, and discloses a lime kiln partition intelligent temperature control system and a storage medium, and the system comprises a data collection unit which is used for collecting state data of each region of a lime kiln; the working condition recognition unit recognizes working conditions based on the state data; the temperature control unit is provided with a PID (Proportion Integration Differentiation) control strategy and a prediction control strategy, and the opening degrees of the fuel regulating valves and the air regulating valves in different areas in the lime kiln are calculated according to the corresponding control strategies selected on the basis of working conditions; the discharging control unit is provided with a balance control strategy, the balance control strategy obtains the current discharging speed through the current productivity of the lime kiln and the material level height in the lime kiln, and the execution unit correspondingly controls the lime kiln according to the control quantity. The method effectively solves the problems of difficulty in multi-area coordination, poor working condition adaptability, high energy consumption and the like in a traditional control mode, and has the remarkable advantages of improving the temperature control precision, ensuring the production stability and reducing the energy consumption.

The invention discloses a deep sea underwater integrated electro-hydraulic actuator system adopting pump and valve combination. The deep sea underwater integrated electro-hydraulic actuator system comprises a hydraulic cylinder, a pump control assembly and a valve control assembly. The pump control assembly comprises a metering pump, a first switch valve and a second switch valve; the valve control assembly comprises a large-flow proportional valve, a small-flow proportional valve, a deep sea compensation energy accumulator and a third switch valve. The metering pump, the first switch valve and a rod cavity of the hydraulic cylinder are sequentially connected through a pipeline, the metering pump, the second switch valve and a rodless cavity of the hydraulic cylinder are sequentially connected through a pipeline, the metering pump, the third switch valve and the deep sea compensation energy accumulator are sequentially connected through a pipeline, and the rodless cavity of the hydraulic cylinder is connected with the large-flow proportional valve and the small-flow proportional valve through pipelines. Two control modes of the actuator can be completed, large-flow control is achieved through the pump control assembly, high efficiency and energy conservation are achieved, flow needed by maintenance is supplied to a rodless cavity of the actuator through the valve control assembly via the large-flow proportional valve and the small-flow proportional valve, and posture keeping and emergency action are achieved.

The invention provides an intravascular occluder which comprises an occluder body, a catheter part and a control mechanism, the occluder body is of an umbrella-shaped structure formed by a plurality of frameworks which can be opened, and a layer of covering is attached to the occluder body; the catheter part is used for accommodating the plugging device and the connecting rod part of the control mechanism; the control mechanism comprises a connecting rod part and a handle control part, and is used for controlling the pushing and withdrawing of the plugging device; after the plugging device is unfolded to completely plug the inner diameter of the blood vessel, the function of cutting off blood flowing can be achieved, a space for blood flowing can be reserved at the position close to the inner wall of the blood vessel by properly retracting the plugging device into the catheter, and the plugging device can be completely retracted into the catheter by completely retracting the plugging device. The device has the advantages that unfolding and folding are completely reversible, controllable opening and cutting of blood flow can be achieved, complications caused by long-time ischemia of blocked blood vessels can be avoided, and a long-time operation becomes possible.

The invention discloses a bulk cargo grab bucket control system based on machine vision, relates to the technical field of automatic control, and solves the technical problems that in the prior art, a bulk cargo containing container is likely to make contact with a grab bucket to cause damage to the grab bucket, and the bulk cargo grabbing efficiency of the grab bucket is low due to the fact that the same control mode is adopted for different materials. Obtaining a material label through the material identification model; generating a grabbable area according to the material data and the grab bucket parameters; obtaining a target coordinate through a laser radar technology; obtaining an opening angle and a closing angle in the grab bucket parameters according to the material data; grab bucket adjustment parameters are generated according to the grab bucket coordinates and the target coordinates; the grab bucket adjusting parameters are assigned to the corresponding grab bucket parameters for control, the control parameters of the grab bucket are adjusted in real time along with changes of materials and changes of the grabbing environment, the grabbing area is planned for grabbing, contact between the grab bucket and the containing container is reduced, the material grabbing efficiency is improved, and the damage rate of the containing container is reduced.

The invention discloses a rolled piece temperature control system based on a steel rolling process, which relates to the technical field of steel rolling and comprises a detection module, a control module, an execution module and a cooling module, the detection module comprises infrared thermometer arrays, an ultrasonic thickness gauge, an electromagnetic flowmeter, a pressure transmitter and a thermal resistance thermometer, and the infrared thermometer arrays are used for being arranged in front of and behind a cooling section and respectively collecting initial temperatures before entering a cooling system. Through the self-adaptive PID algorithm, the finite difference heat conduction model and the Smith pre-estimation compensation strategy are combined, the problem of control delay caused by the large lag characteristic in the cooling process is solved, control parameters can be dynamically adjusted according to the rolling speed, the steel grade characteristic and the like, temperature adjustment better fits the actual working condition, and the control precision is improved. The phenomenon of supercooling or insufficient cooling in a traditional control mode is fundamentally avoided, and the uniformity and stability of the performance of rolled pieces are guaranteed.

The invention discloses a multi-device and multi-mode centralized control system which comprises an interaction control end and a device assembly. The interactive control end is configured according to three different control modes of centralized control, independent control and hybrid control, in the centralized control mode, a set of main control unit is configured for all devices, and the main control unit comprises a main control server which is used for operating a main control program and coordinating and controlling operation of all device components; in the independent control mode, each equipment component is provided with a corresponding embedded controller, and the embedded controller comprises an embedded control server which is used for operating a main control program for controlling the corresponding equipment component; in the hybrid control mode, one or more independent devices are provided with embedded controllers, the embedded controllers communicate with the main control server, the device assembly comprises a device body and a driving unit, and the device body is driven by the driving unit to achieve various operation functions. According to the invention, centralized control of multiple devices in a large-scale manufacturing factory can be realized.

The invention discloses an intelligent closed-loop control system for a passivation solution in a hot galvanizing process, particularly relates to the technical field of industrial process automatic control, and is used for solving the problem of large parameter fluctuation caused by the fact that an existing passivation solution control mode lags behind intermittent production takt change. A signal monitoring module identifies a production cycle and calculates an estimated compensation value, an entropy weight generation module generates a weight distribution coefficient based on symbol sequence information entropy, and a data fusion module fuses the estimated compensation value and real-time monitoring data to generate a cooperation instruction. The trajectory prediction module simulates and generates a virtual change trajectory and a dynamic envelope line thereof according to the instruction, the envelope monitoring module monitors the running state of the real trajectory in the envelope line in real time, and the execution early warning module executes the instruction or generates an early warning signal according to the monitoring result. According to the system, prospective prediction and self-adaptive control of parameters of the passivation solution are realized, and the control precision and stability are effectively improved.

The invention provides a backpressure adjusting method and device for a natural ventilation direct air cooling system, and the method comprises the steps: obtaining the current backpressure of a steam turbine, and executing an up-cut step sequence when the current backpressure is greater than a set backpressure first preset difference value, and the up-cut step sequence comprises the steps: setting a first target sector as a new commissioning sector, and setting a second target sector as a second commissioning sector; the control mode of the shutter opening degree of the new commissioning sector is set to be automatic adjustment within the first preset opening degree range; when the current back pressure is smaller than a second preset difference value of the set back pressure, a down-cut step sequence is executed, and the down-cut step sequence comprises the step that the control mode of the shutter of the second target sector is automatically adjusted in the first preset opening degree range from the second preset opening degree range to the second preset opening degree range till the second target sector quits operation. By controlling the automatic switching of the sectors and the automatic adjustment of the opening degree of the shutter, the automatic adjustment of the back pressure is realized, the automation degree of the back pressure adjustment is improved, the precision and efficiency of the back pressure adjustment are further improved, and the efficiency of the generator set is improved.

The invention relates to the field of aircraft tire tests, in particular to a high-precision load control method and system for an aircraft tire in a simulated take-off test, and aims to solve the problem of poor control precision of a large-inertia and high-frequency-response dynamic load. According to the invention, a loading force and deformation displacement double-quantity feed-forward closed-loop control mode is adopted to realize load control. The core of the method is that the dynamic stiffness of the aircraft tire is calculated by utilizing a force and a displacement value which are measured in real time in a test, a stiffness coefficient is used for adjusting a feedforward parameter in real time, and a first candidate displacement amount is calculated through a target load and the stiffness coefficient; in addition, the second candidate displacement amount is calculated by using the number set in the section with the high target load change rate. And finally, selecting the first candidate displacement or the second candidate displacement according to the actual situation to execute the action. In the face of a complex load curve, the high-precision control task of the load curve can be effectively completed.

The invention provides a vehicle lane control interaction method and device, electronic equipment, a vehicle and a medium, and the method comprises the steps: obtaining the real-time sensing data of the surrounding environment of the vehicle, and generating and displaying a lane touch identifier corresponding to a lane in the surrounding environment on an intelligent driving sensing image of the vehicle according to the real-time sensing data; detecting a touch operation received by the lane touch identifier in real time, determining a lane corresponding to the touched lane touch identifier as a target lane, and displaying at least one lane control mode; any one lane control mode in the at least one lane control mode is determined as a target lane control mode; and according to the real-time lane information, controlling whether the vehicle runs on the target lane according to the target lane control mode. According to the man-machine interaction method for vehicle lane control provided by the invention, the driving safety is ensured while the individuation degree of an intelligent driving system is improved, so that the user experience of automatic driving is improved.

The invention provides an emergency braking control method, which is realized by using an emergency braking loop structure, and the emergency braking loop structure comprises a control loop connected with an occupied end and an action loop for connecting emergency braking electromagnetic valves of vehicles in parallel; a positive electrode power supply and a negative electrode power supply are provided for the control loop through the occupied end, and the control loop enables the two ends of an emergency braking loop relay to be powered on by connecting monitoring conditions and train lines in series; the action loop is used for connecting the emergency braking electromagnetic valves of all the vehicles in parallel, and when the relay of the emergency braking loop loses power, the normally open contact is disconnected, the emergency braking electromagnetic valves of all the vehicles lose power, and emergency braking is generated; according to the method, the problems and defects of an emergency braking loop of an existing motor train unit project can be solved, a specific monitoring function is executed through the emergency braking loop independent of a train control system, and the emergency braking loop adopts a control mode of a hardware relay control circuit, so that safe stopping of a motor train under the fault condition is guaranteed.

The present invention discloses a touch pen, a touch display system and a control method thereof, wherein the touch pen comprises: a pen body, a shell, a control part, a pressure sensing part and a magnetic component, wherein a main control unit is arranged in the pen body; the shell is arranged in the pen body, and the shell is made of a magnetic conductive material; one end of the control part is located outside the pen body, and the other end of the control part extends into the shell; the pressure sensing part is arranged in the shell and is located in the extension direction of the control part, and the pressure sensing part is connected to the main control unit; the magnetic component is arranged in the shell and is sleeved on the control part, and the magnetic component is magnetically attracted to the shell in a direction away from the pressure sensing part; wherein the control part can move relative to the shell to contact or separate from the pressure sensing part. The technical solution of the present invention can provide a control method for a touch pen that is simple and convenient to operate, and increase the functional diversity of the touch pen.

The invention discloses a universal remote controller control method, which relates to the technical field of intelligent remote controller control, and comprises the following steps: starting a Bluetooth function through a mobile phone application program, and connecting target remote controller equipment to enter an application program main interface; a user sequentially selects the equipment information of the target equipment through the main interface; requesting a firmware package from a server according to the selected equipment information, and downloading the firmware package matched with the selected equipment; after the user confirms the firmware package, the application program pushes the firmware package to the remote controller through Bluetooth, firmware upgrading is carried out on the remote controller, and feedback information of upgrading success is returned; based on feedback information of successful upgrading, loading a control code library matched with the selected equipment from the server, and pushing a control code to the remote controller; according to the invention, the remote controller is used for verification and the control code library is stored, so that accurate control of different devices is realized, user experience is optimized, and the technical progress of the intelligent household device control mode is obviously promoted.

The invention discloses grinding and polishing equipment for the inner wall of a pipe workpiece. The grinding and polishing equipment comprises a rack, a workpiece rotating and supporting mechanism, a grinding mechanism, a radial feeding mechanism, an axial moving mechanism, a workpiece stabilizing mechanism and an electric control system. The grinding assembly is a flexible grinding wheel formed by splicing a plurality of arc-shaped grinding pieces, a pneumatic motor drives the flexible grinding wheel to rotate at a high speed to serve as main cutting motion, constant-pressure contact control is achieved through a radial feeding mechanism, abrasion of the grinding wheel can be compensated in a self-adaptive mode through the control mode, and it is guaranteed that the grinding pressure is stable; therefore, the reference size of the workpiece is protected to the maximum extent while the defects of the inner wall are effectively removed, the problem of size out-of-tolerance caused by uneven pressure or abrasion in traditional rigid grinding is avoided, constant-pressure, efficient and high-quality grinding is guaranteed, and the grinding and polishing efficiency and quality of the inner wall of the pipe workpiece are effectively improved.

The invention discloses a rock shear seepage coupling true triaxial test system, which relates to the technical field of rock mechanical tests, and comprises a host, a sigma 1 / sigma 2 direction loading module, a sigma 3 direction confining pressure module, a pressure chamber auxiliary system, a sample clamp, a pore water seepage system, a temperature system, a control module and a data acquisition and processing module, through servo closed-loop linkage double-pump loading in the sigma 1 / sigma 2 direction, synchronous output of the double pumps and coordination of pressure supply of the two oil cylinders by the controller, a strain correction algorithm is combined, stability of a stress loading center is guaranteed, strain measurement accuracy is improved, confining pressure is accurately controlled in the sigma 3 direction through a double-balance pressure chamber and a pressure regulation algorithm, and the stress measurement accuracy is improved. The pressure chamber is in full-automatic operation, manual steps are omitted, errors are reduced, efficiency is improved, a stress-free blank angle clamp eliminates friction interference, a seepage system supports a double-loading mode, a control module achieves multi-control-mode impact-free switching, a data processing module is combined with an elastic modulus calculation algorithm, rock mechanical parameters are accurately obtained, and the multi-field coupling test requirement is met.

The invention relates to the technical field of freeze-drying control, and discloses an automatic control method and system for freeze-drying, rotating and pre-freezing. According to the method, a freeze-drying process dynamic model is constructed by monitoring operation parameters in a rotary pre-freezing stage, and characteristic indexes of the freeze-drying process dynamic model are analyzed; comparing the index with a standard reference value to generate a deviation analysis result, mining abnormal signals, screening key control points, monitoring environmental parameters in real time, and calculating response coefficients of the environmental parameters influencing the key control points; evaluating a potential fault mode based on the response coefficient, positioning a fragile link in the process, and carrying out performance detection to find out a specific problem point; formulating a control planning target according to the problem point, analyzing a corresponding control mode, querying a standard of the control mode, and generating a control operation instruction according to the standard; after the instruction is applied to equipment execution control, freeze-dried product quality data is collected for consistency verification, and finally a process quality report is generated. According to the method, multi-dimensional monitoring, fault early warning and accurate regulation and control of the freeze-drying, rotating and pre-freezing process are achieved.

The invention discloses a control method of a multi-split air conditioner based on load self-adaption and an air conditioning unit, and relates to the technical field of air conditioner control. The technical problems that when the multi-split air conditioner operates at small load at night, due to the fact that the output capacity is not matched with the required load, the control mode is passive, and self-adaptive adjustment is insufficient, a unit is started and stopped frequently, room temperature fluctuates, and a user feels uncomfortable are solved. Each indoor unit is independently controlled, a load self-adaptive matching algorithm is adopted, room loads are calculated through real-time monitoring, matched output capacity loads are generated according to real-time load changes in respective rooms, and independent control logic is generated; the outdoor unit calculates the supply capacity according to the parameter change of each indoor unit, realizes load self-adaptive adjustment based on the combined control of the compressor frequency and the fan rotating speed, and automatically optimizes and iterates the room load through the real-time matching and automatic optimization of the output capacity of the outdoor unit and the room load on the premise of not increasing hardware. And real-time supply and demand matching of loads in each room is realized.

The embodiment of the invention provides a barrier gate control method and device, a management and control all-in-one machine and a storage medium, and relates to the technical field of video monitoring, the method is applied to a monocular camera arranged on the front face of the management and control all-in-one machine, and the management and control all-in-one machine further comprises a binocular camera arranged on the side face; the method comprises the following steps: acquiring each abnormal event reported by a binocular camera and the occurrence time of each abnormal event; determining an initial control mode about the barrier gate based on the license plate recognition result; if the initial control mode is to open a barrier gate, whether an abnormal event exists in a lane area indicated by the detection area currently or not is analyzed based on the occurrence time of the currently obtained abnormal event; if the abnormal event exists, correcting the initial control mode based on the current abnormal event to obtain a target control mode, and controlling the barrier gate based on the target control mode; and if not, controlling the barrier gate based on an initial control mode. According to the scheme, the intelligent degree of barrier gate control can be improved.

The invention relates to the technical field of injection molds, in particular to a high-temperature-resistant injection mold which comprises a movable mold and a static mold forming mold opening and closing operation with the movable mold, guide columns are arranged at the four corners of the forming face of the static mold, and liquid bags are further arranged in a left positioning cavity and a right positioning cavity correspondingly. The front side and the rear side of each liquid bag are each provided with a first hose, the sprayers on the four sets of pipelines are automatically opened, a product piece is rapidly cooled in the mode that cooling liquid is sprayed diagonally, and the four sprayers will automatically stop spraying liquid till the cooling liquid compressed in the first hoses in advance is completely discharged. And the spray head is elliptical, and when the cooling liquid is sprayed outwards, the cooling liquid acts on the injection molding product part in a large area, so that the cooling efficiency of the injection molding product part is improved. The four nozzles stop the liquid spraying action, automation can be achieved without manual operation or complex mechanical structures, and the control mode is simple in structure.

The invention provides a motor detection method and device, electronic equipment and a storage medium, and the method comprises the steps: controlling a motor to operate under a first identification parameter, and calculating a phase resistance value of the motor under the first identification parameter; controlling the motor to operate under a second identification parameter, and collecting a sinusoidal current response signal of the motor under the second identification parameter; calculating a d-axis inductance value and a q-axis inductance value based on the sinusoidal voltage excitation signal, the sinusoidal current response signal and the phase resistance value; the motor is forcibly dragged in a current-frequency ratio control mode, so that the rotating speed of the motor is increased to the target rotating speed; and calculating the flux linkage coefficient by combining the steady-state voltage and the current value of the motor at the target rotating speed with the d-axis inductance and the q-axis inductance. According to the method, the detection precision of the motor parameters can be improved.

The invention discloses a tracking control method and device and a medium, and the method comprises the steps: determining a prediction step length corresponding to a current moment according to the current speed of a vehicle at the current moment and the current road curvature of the position of the vehicle at the current moment; according to a preset control vector constraint condition and a pre-constructed cost function equation, screening out an optimized control vector set which meets the control vector constraint condition and enables a cost function value of the cost function equation to be minimum; and inputting the optimization control vector corresponding to the prediction point corresponding to the next moment in the prediction step length into the vehicle so as to carry out tracking control operation on the vehicle at the next moment. Visibly, according to the embodiment of the invention, a mode of realizing tracking control by using a neural network model in related technologies is avoided, so that the operation process of the vehicle in tracking control is simplified, and the timeliness of tracking control is ensured.

The invention discloses a diluent supplementing control method and system, a medium and a product, and relates to the field of industrial automation control. By implementing the application, the control system accurately recognizes the station information and the state of the liquid storage tank through the station code, so that the whole-process monitoring and accurate control of the diluent supplementing process are realized. The control system automatically checks whether the type and the concentration of the diluent to be supplemented meet the requirements or not, and manual operation errors are avoided. The control system collects real-time weight data of the liquid storage tank and generates a weight change curve, the actual material supplementing rate can be accurately calculated and compared with the standard material supplementing rate, and abnormal conditions can be found in time. Compared with traditional liquid level control, the material supplementing control mode based on weight data is more accurate and reliable, the timeliness and accuracy of diluent supplementing can be guaranteed, and the production efficiency and the stability of product quality are improved.

The invention discloses a dynamic pouring control method for a hot-metal bottle, which belongs to the technical field of metallurgical industry automation control, and comprises the following steps: carrying out high-precision dynamic weighing and vibration compensation on the hot-metal bottle; performing multi-source sensing and safety monitoring on the hot-metal bottle; self-adaptive dumping speed control is realized based on the flow speed of molten iron in the molten iron tank; parameter optimization is carried out, and optimal control parameters are output; and setting a security protection strategy. The problems that an existing molten iron tank is insufficient in control metering precision, extensive in control mode and weak in safety protection can be solved, and blast furnace molten iron can be transferred and poured through the molten iron tank more efficiently, intelligently and safely.

The invention provides a vehicle control method and device, a controller and a vehicle, and the method comprises the steps: obtaining an expected yaw velocity, an actual yaw velocity, a front axle steering angle and a rear axle steering angle in a vehicle turning rotation adjustment process; determining a target yaw moment according to a difference value between the actual yaw velocity and the expected yaw velocity; according to the target yawing moment, the front axle steering angle, the rear axle steering angle, the number of motors of the front axle and the number of motors of the rear axle, the front axle longitudinal moment and the rear axle longitudinal moment are determined, and the total number of the number of the motors of the front axle and the number of the motors of the rear axle is larger than 1 and smaller than 4; and controlling the vehicle to steer according to the front axle longitudinal moment and the rear axle longitudinal moment. Through the method, a precise control mode of turning around in situ is provided for the vehicle with double motors and three motors.

The invention relates to the technical field of intelligent fan control, and provides a bidirectional convection enhanced cooling fan control method and system, and the method comprises the steps: controlling a bidirectional convection enhanced cooling fan to execute various operation modes according to each group of cooling working condition feature data, and recording corresponding cooling effect data; the heat dissipation working condition characteristics comprise equipment temperature, equipment load, environment temperature and environment humidity; the heat dissipation effect data comprises the equipment temperature reduction amplitude and the fan energy consumption in the preset time; determining an optimal operation mode corresponding to each group of heat dissipation working condition characteristic data based on the heat dissipation effect data; constructing a decision tree model based on the heat dissipation working condition feature data and the corresponding optimal operation mode; determining an optimal operation mode of the equipment under the current working condition by utilizing the decision tree model; and controlling the bidirectional convection enhanced cooling fan to operate according to the optimal operation mode under the current working condition. The matching degree of the fan operation control mode and the heat dissipation requirement is improved, and the energy consumption and the heat dissipation effect are balanced.

The invention provides a multi-motor control method and device based on droop control, and the method enables a droop control mode, namely a distributed power balance mode, to be applied to coal mine multi-point drive belt conveyor equipment, and overcomes the defects of an existing master-slave control mode. Feedback of the actual torque measured value is referenced in the rotational speed control reference value, so that the rotational speed control reference value can reflect information of the actual torque current. When the variable-frequency driving load is too heavy, namely the torque is too large, the rotating speed control reference value can be adjusted through the rotating speed droop feedback channel, so that the torque control reference value is changed, and the purpose that the frequency converter controls power balance among the driving motors is achieved.

The invention relates to the technical field of power management, in particular to a buck-boost bidirectional DCDC converter control method and system and a storage medium, and the method comprises the steps: obtaining a DC bus voltage and a battery voltage of a converter; the switching frequency, the dead time and the bus voltage of the converter are obtained, and hysteresis parameters are calculated based on the switching frequency, the dead time and the bus voltage; the correlation between the direct current bus voltage and the battery voltage is obtained based on the hysteresis parameter, the working modes needing to be operated of the converter are judged based on the correlation between the direct current bus voltage and the battery voltage, and the working modes comprise the BUCK mode, the BOOST mode and the upper tube direct connection mode; and adjusting the PWM waveform of the driving switch tube so as to control the operation of a corresponding working mode. The defects that a traditional control mode is large in switching loss, high in common-mode noise and low in specific working condition efficiency are effectively overcome, the conversion efficiency of the converter is remarkably improved, common-mode interference is reduced, and the electric energy conversion stability and reliability are enhanced.