3279 results about "Flux control" patented technology

The invention discloses an accurate flow control method and system for a two-phase cold plate cooling data center, and relates to the technical field of two-phase cold plate cooling, and the method comprises the following steps: S1, collecting multi-mode operation monitoring data in real time, and carrying out the data preprocessing; s2, constructing a multivariable short-time-sequence prediction model, predicting the cooling demand, and performing optimization regulation and control on a cooling demand prediction result; s3, the target regulation and control flow of the cooling liquid is predicted, and flow and cooling execution measures are taken according to the target regulation and control flow prediction result; the opening degree of the valve is accurately adjusted and evaluated in real time, and accurate flow control is achieved; s4, integrating multi-mode operation monitoring data, a cooling demand prediction result, a target regulation and control flow prediction result and a valve opening accurate regulation evaluation result, and constructing a parameter optimization and safety fault-tolerant mechanism; the problems of chip safety and energy consumption risks caused by cold plate temperature overshoot and cooling capacity regulation lag under high-load fluctuation of the server are solved.

The invention relates to the technical field of automatic control, in particular to an automatic cutting fluid proportioning control system which comprises a flow control module, a delay compensation module, a dynamic adjusting module and a dynamic flow adjusting module. According to the invention, the flow and proportion of the cutting fluid are accurately adjusted, so that the requirements of different production stages are met, the use efficiency of the cutting fluid and the processing quality stability are improved, parameters such as the flow and the temperature are monitored in real time, the flow and the proportion are dynamically adjusted, instability caused by environmental fluctuation or equipment response lag is reduced, accurate supply of the cutting fluid is ensured, and the production efficiency is improved. Aiming at variable production requirements, environment changes are rapidly responded, a matching strategy is automatically optimized, machining errors and equipment abrasion caused by matching imbalance are effectively avoided, the improved control strategy improves the cutting fluid utilization rate, it is guaranteed that the machining quality and the equipment service life are synchronously prolonged, resource waste is reduced, meanwhile, the manual intervention requirement and the operation complexity are reduced, and the production efficiency is improved. And the overall production efficiency and the system stability are improved.

The invention discloses a control system and method of an intelligent screw grouting extruder, and belongs to the technical field of wire and cable production, and the control system comprises the following steps: a flow control module monitors the material flow in real time, and adjusts the feeding amount through fluctuation detection and frequency analysis; the temperature control module monitors and predicts temperature deviation through a temperature sensor and adjusts heating power; the rotating speed control module initializes the rotating speed of the screw according to material characteristics and monitors the load of the screw through the torque sensor so as to dynamically adjust the rotating speed of the screw; the pressure adjusting module monitors and adjusts the pressure of the inner cavity of the extruder in real time, and adjusts the distance between the die orifice and the screw rod by calculating the pressure deviation; the quality detection module detects the physical and visual quality of the product on line through a laser range finder and an image recognition technology, and carries out comprehensive quality evaluation; according to the invention, the problem of how to dynamically adjust the running state of the extruder according to real-time parameters such as temperature, flow, pressure and rotating speed is solved, so that the consistency of the thickness of a cable sheath layer and the product quality is ensured.

A blower (1) for a fuel cell assembly for recirculating a gas mixture used for operating the fuel cell assembly is equipped with a drive motor (7, 8, 9) comprising a rotor (9) coupled to a motor shaft (7) and a stator (8) arranged radially outside the rotor (9). An annular channel (10) is provided radially between the rotor (9) and the stator (8) for conveying the gas mixture from an inlet side to an outlet side of the annular channel (10). A blower impeller (5) coupled to the motor shaft (7) is provided in the region of the outlet side of the annular channel (10) to convey the gas mixture from the inlet side to the outlet side of the annular channel (10) when rotating. Furthermore, a flow guide device (14) is provided to impart a circumferential swirl to the gas mixture entering the annular channel (10).The annular channel (10) is bounded by an assembly consisting of an outer wall (16; 21) and an inner wall (17), wherein the flow guide device (14) is provided on the inlet side between the outer wall (16; 21) and the inner wall (17).

The invention discloses a dynamic flow control method for a two-phase cold plate liquid cooling system based on multi-modal sensing, and relates to the technical field of equipment cooling. Comprising the following steps: S1, collecting liquid cooling monitoring data in real time, and performing data preprocessing; s2, judging the state risk of the cold plate, carrying out signal cross validation, and taking an abnormal regulation and control measure; s3, cooling liquid flow regulation and control are carried out, and the matching degree of flow regulation and control and chip thermal load is evaluated, so that flow regulation and control correction is carried out; and S4, constructing a big data modeling and simulation feedback platform, evaluating a flow regulation and control self-healing effect, optimizing each parameter and strategy, and carrying out self-learning evolution. The problems that an existing two-phase cold plate liquid cooling system generally only depends on a single temperature signal, lacks a multi-source redundancy check mechanism, has the problems of response lag, weak local reflection capacity, high risk during failure and the like, consequently, the cooling capacity distribution and adjustment precision is insufficient, and the actual requirement of a high-heat-density data center for heat dissipation is difficult to meet are solved.

The invention discloses an intelligent control method and device for the urban solid waste incineration process, a medium and a product, and relates to the technical field of urban solid waste incineration. The method comprises the steps that the pusher speed, the fire grate speed, the primary air flow, the secondary air flow, the combustion time, the main steam flow and the furnace oxygen amount of the urban solid waste incineration process at the current moment are obtained; according to the pusher speed, the fire grate speed, the combustion time and the main steam flow at the current moment, the main steam flow at the next moment is determined through a main steam flow prediction model; according to the primary air flow, the secondary air flow and the furnace oxygen amount at the current moment, the furnace oxygen amount at the next moment is determined through a furnace oxygen amount prediction model; and in combination with a switching rule based on expert knowledge, a main steam flow controller and a furnace oxygen amount controller are solved by utilizing a gradient descent algorithm, and the optimal control rate is determined so as to control the urban solid waste incineration process. The solid waste treatment efficiency is improved, and rapid and stable control over the main steam flow and the furnace oxygen amount is achieved.

The invention provides a thermal behavior experiment system and method under a narrow rectangular channel reflooding cooling condition. The system comprises a heating water storage tank, a nitrogen tank, a steam tank, a shield pump, a preheating section, a first direct-current power supply, a second direct-current power supply, a narrow rectangular channel test section, a steam-water separator, a surge tank, a flow control valve, a silencer and an electromagnetic valve. The experimental working medium is deionized water, and re-submerging cooling experiments under different system pressures, working medium supercooling degrees, heating wall surface heat flux densities, working medium submerging speeds, heating wall surface initial temperatures and channel interior initial liquid levels can be carried out on an experimental section of a narrow rectangular channel structure. The device is suitable for narrow rectangular channel structures with different sizes, and can be used for carrying out re-submerging experiments on experiment sections with single-plate double-channel, double-plate three-channel and more channels. The system pressure and the inlet flow in the submerging process can be kept stable, and it can be ensured that the supercooling degree of a working medium, the heating wall surface temperature and the initial liquid level are controllable.

A rotating check valve is disclosed for improved debris collection within a wellbore. The check valve can be part of a debris removal tool that includes a motor, pump, gearbox, bailer, milling bit, the check valve, rotational shafts. On its uphole end, the check valve can be coupled with the bailer such that the check valve can rotate relative to the bailer. Also on the uphole end, the check valve can be rotationally coupled to a shaft that passes through the bailer and couples with the gearbox. On the downhole end, the check valve can be rotationally coupled to the milling bit. The check valve can include a torque transfer mechanism that transfers torque generated by the motor and gearbox to the milling bit. The check valve can include a unidirectional flow control mechanism that restricts the flow of fluid and debris to the uphole direction.

A heat pump system for a vehicle is configured by including a valve, a first cooling apparatus, a second cooling apparatus, and a flow control line, to be configured for adjusting a temperature of a battery module by use of a single chiller where a refrigerant and a coolant are heat-exchanged, selectively recollecting waste heat of the electrical component and the battery module and using the same for heating of the vehicle interior, and forming a plurality of coolant flowing lines by a single valve according to selected mode of the vehicle.

An embodiment thermal management system for a vehicle includes a compressor on a first refrigerant line that compresses a refrigerant circulated therein, an external condenser on the first refrigerant line downstream of the compressor that releases heat of the refrigerant, a front evaporator on the first refrigerant line downstream of the external condenser that evaporates the refrigerant, a second refrigerant line connected to the first refrigerant line that allows the refrigerant to be introduced thereinto and then to be discharged upstream of the compressor, a rear evaporator on the second refrigerant line that selectively releases heat of the refrigerant, a first flow control valve on the first refrigerant line that allows the refrigerant to be introduced into the rear evaporator or the external condenser, and a second flow control valve on the second refrigerant line that allows the refrigerant to be introduced into the compressor or the external condenser.

A gas turbine engine includes a gearbox assembly that includes a gearbox and a gutter for collecting a gearbox lubricant scavenge flow from the gearbox. The gutter is characterized by a lubricant extraction volume ratio between 0.01 and 0.3, inclusive of the endpoints. The lubricant extraction volume ratio defined by:VGVG⁢B·VGis a gutter volume of the gutter and VGB is a gearbox volume. The gas turbine engine includes a lubricant flow control system that includes a variable flow lubricant pump that generates a pump variable flow of lubricant to the gearbox assembly. The gearbox assembly has a variable consumption demand for delivery of lubricant. A lubricant flow controller is configured to generate a pump control command for the variable flow lubricant pump to produce the pump variable flow of lubricant based on the variable consumption demand.

The invention belongs to the technical field of power battery cooling, and particularly relates to a flow control method and system for a liquid cooling system of an electric vehicle-mounted power battery, and the method comprises the steps: carrying out the parameterization of a geometric model of the liquid cooling system; establishing an equipment resistance model based on the equipment flow resistance characteristics; initializing flow distribution, constructing a dynamic flow distribution model, calculating the flow of each node and judging whether the flow meets a target requirement or not, and if not, readjusting the flow; calculating the resistance of each section, determining the total resistance of the pipeline, and checking the water pump lift; the flow uniformity is judged by calculating the pipeline resistance between the nodes, and if the flow is not uniform, the flow is redistributed or the pipeline design is optimized until the flow is uniform. Through flow control, the problems of non-uniform flow distribution and poor temperature consistency of multiple battery packs in the prior art are solved, the optimal working state of the power battery is ensured, overheating and overlarge temperature difference are avoided, and the operation efficiency, stability, durability and safety are improved.

A heat pump system for a vehicle is configured by including a valve, a first cooling apparatus, a second cooling apparatus, and a flow control line, to be configured for adjusting a temperature of a battery module by use of a single chiller where a refrigerant and a coolant are heat-exchanged, selectively recollecting waste heat of the electrical component and the battery module and using the same for heating of the vehicle interior, and forming a plurality of coolant flowing lines by a single valve according to selected mode of the vehicle.

Some implementations include a system comprising a first tubular fluidically connected with one or more frac pumps and one or more first flow control devices that are fluidically connected to a second tubular that is fluidically connected to a wellhead. The system also may include a third tubular fluidically connected with the first tubular and one or more second flow control devices that are connected with a fourth tubular that is fluidically independent of the wellhead.

The invention discloses a flow control method and device, a storage medium and semiconductor processing equipment. The flow control method comprises the steps that a second switch valve is switched on, a first switch valve is switched off, and the first actual flow of preset gas in a gas pipeline is detected when a flow controller is set to be the first current preset target flow; the second switch valve is switched off, the first switch valve is switched on, and the current equivalent flow of the preset gas in the gas pipeline is detected when the flow controller is set to be the first current preset target flow; calculating current temperature change values of the reaction chamber and the virtual chamber; calculating a first flow correction coefficient of a flow controller according to the first current preset target flow and the first actual flow; calculating a second flow correction coefficient of the flow controller according to the current temperature change value; and correcting the first current preset target flow of the flow controller by adopting the first flow correction coefficient and the second flow correction coefficient. The problem that the thickness of the etched film changes can be solved, and the first sheet effect is restrained.

The invention provides a flow control method and device of a mass flowmeter, electronic equipment and a storage medium, and relates to the technical field of flow control, the method comprises the steps of monitoring a first mass flow of a target fluid at a first moment, and judging whether the first mass flow is smaller than a preset flow threshold or not; under the condition that the first mass flow is smaller than a preset flow threshold value, switching to a small flow control mode; under the small-flow control mode, PID parameters are dynamically optimized based on a set of characteristic data of the target fluid, a set of PID control parameters are obtained, and the set of characteristic data at least comprises viscosity data of the target fluid, temperature data of the target fluid and pressure data of the target fluid; and performing closed-loop control on the flow of the target fluid based on the group of PID control parameters. By implementing the technical scheme provided by the invention, the effect of improving the stability of flow control is achieved.

The invention discloses a double-valve heterogeneous fuel regulator, an aero-engine and a control valve switching method.The double-valve heterogeneous fuel regulator comprises an electro-hydraulic servo valve set, and the electro-hydraulic servo valve set comprises a main control electro-hydraulic servo valve, a standby electro-hydraulic servo valve, a conversion valve and a conversion electromagnetic valve; the conversion electromagnetic valve is used for controlling the inlet end of the conversion valve to be connected with a master control electro-hydraulic servo valve or a standby electro-hydraulic servo valve in a switchable mode, and the internal structure of the standby electro-hydraulic servo valve is different from the internal structure of the master control electro-hydraulic servo valve. The size of a fuel oil flow channel in the standby electro-hydraulic servo valve is larger than that of a fuel oil flow channel in the master control electro-hydraulic servo valve. When high-precision fuel oil flow control is met, simultaneous faults of the standby electro-hydraulic servo valve and the main control electro-hydraulic servo valve caused by the same pollutants are avoided, the failure rate of clamping stagnation and blockage of the double-valve heterogeneous fuel oil regulator can be reduced, and therefore the reliability and safety of fuel oil and guide vane control of the fuel oil electronic control regulator are improved.

A multi-way valve adapted to control a flow of fluid to different thermal fluid circuits includes a valve housing, a valve flow controller, and a sealing system. The valve flow controller is arranged in the valve housing to control flow through the valve housing. The sealing system is configured to seal between the valve housing and the valve flow controller.

The invention relates to the technical field of motor control, and discloses a low-noise flux linkage adaptive feedback control system of a high-speed motor. The system comprises an acquisition module used for acquiring current, voltage and vibration data of a high-speed motor at various operation rotating speeds to obtain operation parameters and noise characteristic data of the high-speed motor; the transformation processing module is used for performing frequency domain orthogonal transformation processing on the operation parameters and the noise characteristic data of the high-speed motor to obtain flux linkage real-time observation data; the self-adaptive analysis module is used for executing multi-mode working condition self-adaptive analysis according to the flux linkage real-time observation data and generating flux linkage control reference values of different rotating speed intervals; and the output module is used for inputting the flux linkage control reference values of different rotating speed intervals into a magnetic-machine coupling control algorithm, and calculating and outputting a motor low-noise driving control signal. According to the method, the problem of magnetic flux path distortion under high-speed operation is effectively solved, and downtime and efficiency loss caused by a traditional off-line calibration method can be avoided.

Active suspension actuator systems including an actuator with a compression volume and an extension volume are described. In some embodiments, the system includes one or more flow control devices in fluid communication with the compression volume and / or the extension volume of the actuator. In some instances, a flow control device may include a pressure balanced blow-off valve (PBOV). In some embodiments, the system includes a high capacity bidirectional base valve. In some embodiments, two or more flow control devices cooperate to, for example, damp low amplitude oscillations in the extension and / or compression volumes, and to allow the build-up of pump generated differential pressures while discharging rapid road induced differential pressure spikes between the extension and compression volumes.

The present invention relates to a flow control method, system and apparatus for a gas conveying system, and a storage medium. The method comprises: acquiring an actual pressure value at a gas outlet of a gas conveying system in real time; on the basis of the actual pressure value and a preset pressure value, adjusting in real time a preset upper limit flow of a gas conveyed by the gas conveying system, so as to obtain a target upper limit flow; acquiring an actual flow value at the gas outlet of the gas conveying system in real time; and by means of using a PID control method and on the basis of the target upper limit flow and the actual flow value, controlling a switch proportional valve of the gas conveying system in real time, so as to complete flow control of the gas conveying system. The present invention can achieve dynamic flow control, and involves a rapid and precise dynamic control process and high robustness, thus truly ensuring the safety of surgical operating spaces of medical apparatuses.

Shown and described herein is a choke assembly for use with a downhole drill string. The choke assembly may include a rotating choke carrier, a stationary seat disposed on the rotating choke carrier and a rotating choke positioned adjacent to the stationary seat to create a seal surface. The choke assembly may further comprise a biasing mechanism applying a biasing force to press the rotating choke against the stationary seat and a flow port within the stationary seat which controls drilling fluid to allow some drilling fluid to become a bypass fluid and pass through the stationary seat.

The invention is suitable for the technical field of part machining, and provides a hardware part machining drilling machine which comprises a base and a three-jaw chuck arranged on the base, and a control frame is further installed on the base in a sliding mode. The drilling mechanism comprises a lifting frame, a supporting box, a control box, a spraying box, a driving motor and a drill bit, the lifting frame and the control frame are in sliding connection through a lifting assembly, and a rotating speed type flow control assembly and a pressure type flow control assembly are further arranged in the containing cavity and the spraying box correspondingly; through the arrangement of the drilling mechanism, the problems that when an existing drilling machine is used, cutting fluid is sprayed at will and cannot be accurately sprayed to a drilling position, so that a drilling structure is prone to overheating, meanwhile, the spraying amount of the cutting fluid cannot be adjusted according to the hardness of a to-be-machined part, and the drilling efficiency is improved are solved. The phenomenon of waste or insufficiency of the cutting fluid is easy to occur, and certain limitation exists.

Relates to an electric control valve for semiconductor gluing equipment and an assembling method of the electric control valve. The electric control valve comprises a pre-assembled inner box which is arranged in the dustproof shell and is provided with a driving assembly and an elastic pre-tightening module in a pre-assembled mode, a sealing membrane which is provided with a semi-circular-ring-shaped arc-shaped thin film part and an inverted-cone-shaped sealing boss and is used for sealing a longitudinal valve port, and a valve seat which is arranged at the lower end of the longitudinal valve port, connected with an inlet flow channel and provided with an inner arc spherical surface. According to the electric adjusting valve, the adjusting lead screw is driven by the stepping motor to rotate so as to achieve accurate lifting motion of the diaphragm connecting shaft, the elastic pre-tightening module provides stable pre-tightening force for the diaphragm connecting shaft, and the cooling space in the dustproof shell effectively reduces the operating temperature of the stepping motor; high-precision fluid control can be achieved, and meanwhile good sealing performance and long-time use durability are achieved. The problems that in the prior art, sealing leakage occurs, a flow channel is polluted, a membrane is prone to being damaged, and environmental adaptability is poor are solved, high-precision, long-service-life and zero-pollution flow control is achieved, and the technical effect of being applied to semiconductor gluing equipment is achieved.

The invention discloses an electric propulsion high-pressure fluid micro-flow control system and belongs to the technical field of electric propulsion flow control. The problems that an existing pressure reduction system is poor in control precision and low in reliability when working frequently are solved. An outlet of a gas cylinder is connected with a gas inlet of a proportional valve through a gas transmission channel, and a self-locking valve and a pressure adjusting system are sequentially arranged on the gas transmission channel; the proportional valve is connected with three third electromagnetic valves at the same time and is respectively used for controlling the on-off of the anode branch, the cathode branch A and the cathode branch B; the pressure sensor PIII is arranged at an air outlet of the proportional valve and used for collecting the pressure of the air outlet of the proportional valve; the pressure adjusting system collects the pressure of the gas transmission channel and sends the pressure to the controller, and the controller controls the pressure adjusting system, the proportional valve and the three third electromagnetic valves according to the pressure of the gas transmission channel, the pressure of the pressure sensor PIII and the working mode of the system. The method is suitable for electric propulsion system control.

The invention belongs to the technical field of industrial automation and control, and particularly relates to a large-inertia dynamic flow balance and control method for forming equipment based on a knowledge graph, which comprises the following steps: firstly, collecting real-time sensor data and historical operation records, denoising by adopting a moving average method, and carrying out normalization processing; a complex association model based on a multi-level knowledge graph is constructed, and intelligent reasoning and optimization decision making are supported; then, a reinforcement learning model is constructed, a state space, an action space and a reward function are defined, and the training efficiency is improved in combination with experience playback and a target network mechanism; and finally, according to the real-time state of the equipment, the system generates an optimal control signal, and dynamically adjusts control parameters by means of a knowledge graph reasoning mechanism to ensure that the equipment works in the optimal operation state. The method can solve the problems that in an existing industrial control system, the flow control precision is not high in the face of large-inertia dynamic flow balance and precise control scenes, and the control is not stable under the large-inertia load.

The invention relates to a method for heating a motor vehicle with an electric motor (150) as a traction motor, which is controlled by means of deadbeat direct torque control and flux control, so-called deadbeat direct torque and flux control (DB DTFC). The invention is characterized in that the torque (T) and the magnetic flux (ψ) are controlled decoupledly and losses are generated with the AC currents to produce heat.

A constant-flow control valve group, an auxiliary arm control module, a complete hydraulic system, and a crane. The constant-flow control valve group comprises: a cartridge valve; a cartridge reversing valve, comprising a working oil port on one side and a main oil return port and a reversing valve oil inlet selectively connected to the working oil port on the other side, the working oil port being connected to a control oil port of the cartridge valve, and the reversing valve oil inlet being connected to a main oil inlet of the cartridge valve; and a feedback on-off valve, disposed in a working feedback oil path connected between the main oil inlet of the cartridge valve and a main feedback oil port of the constant-flow control valve group. The auxiliary arm control module comprises the constant-flow control valve group and a main reversing valve. The complete hydraulic system comprises the auxiliary arm control module and an auxiliary arm luffing cylinder, and may further comprise a load-sensitive oil pump and a main valve. The present application can achieve the effect of directly connecting an auxiliary arm hydraulic system to an existing complete hydraulic system as a sub-module without altering the original system.

The invention discloses a miniature proportional valve control method based on active-disturbance-rejection control, and relates to the technical field of miniature proportional valve control, and the method comprises the steps that a target flow set value is received and is used as a control signal to be sent to a control unit, and the control unit comprises a tracking differentiator, an expansion state observer and a nonlinear feedback controller; the tracking differentiator processes the target flow set value to obtain a differential input signal; the expansion state observer receives the differential input signal and the actual flow feedback signal, and estimates the total disturbance of the system in real time to obtain a disturbance estimation value; the non-linear feedback controller combines the differential input signal and the disturbance estimation value to generate a compensation current signal; the compensation current signal is used as a control parameter of the micro proportional valve, and the position of the valve element is accurately adjusted. An active disturbance rejection control algorithm is adopted, the control performance and disturbance rejection are improved, accurate flow control of the micro proportional valve is achieved, and the micro proportional valve is more suitable for industrial application with high requirements.

An object of the present invention is to provide a work machine that can increase the operation speed of an actuator by a regenerating function while ensuring accuracy of position control of the actuator. For this purpose, a controller computes a target actuator supply flow rate by subtracting a regeneration flow rate from a target actuator flow rate, computes a target flow control valve opening amount on the basis of the target actuator supply flow rate, computes a target pump flow rate equal to or more than the sum of a plurality of the target actuator supply flow rates, controls flow control valves according to the target flow control valve opening amount, and controls a hydraulic pump according to the target pump flow rate.