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614 results about "Regulator" patented technology
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In automatic control, a regulator is a device which has the function of maintaining a designated characteristic. It performs the activity of managing or maintaining a range of values in a machine. The measurable property of a device is managed closely by specified conditions or an advance set value; or it can be a variable according to a predetermined arrangement scheme. It can be used generally to connote any set of various controls or devices for regulating or controlling items or objects.
Pressure pulse generator for measurement-while-drilling systems which produces high signal strength and exhibits high resistance to jamming
InactiveUS6219301B1Easy to useIncrease signal strengthSurveyConstructionsHigh resistanceParticulates
A system is disclosed for generating and transmitting data signals to the surface of the earth while drilling a borehole, the system operating by generating pressure pulses in the drilling fluid filling the drill string. The system is designed to maximize signal strength while minimizing the probability of jamming by drilling fluid particulates. The system uses a rotary valve modulator consisting of a stator with flow orifices through which drilling fluid flows, and a rotor which rotates with respect to the stator thereby opening and restricting flow through the orifices and thereby generating pressure pulses. The flow orifices with the stator in a "closed" position are configured to reduce jamming, and to simultaneously minimize flow area in order to maximize signal strength. This is accomplished by imparting a shear to the fluid flow through the modulator, and minimizing the aspect ratio and maximizing the minimum principal dimension of the closed flow area. A preferred embodiment and three alternate embodiments of the modulator are disclosed.
Owner:SCHLUMBERGER TECH CORP
Control method of speed regulator of servo system of flat knitting machine
InactiveCN102621892AGuaranteed parametersGuaranteed reliabilityWeft knittingAdaptive controlDefuzzificationFuzzy rule
Aiming at the defects in the prior art, the invention discloses a control method of a speed regulator of a servo system of a flat knitting machine. A system in the prior art has low adaptability and low stability. According to a fuzzy proportional-integral (PI) control algorithm of the control method, the running speed of a transmission mechanism of the computerized flat knitting machine is used as a control object; the difference value between the practical reference speed and the feedback speed and the change rate of the difference value are served as input of a fuzzy controller; the input quantity is fuzzified through selecting an appropriate universe of discourse and an appropriate membership function; appropriate fuzzy rule tables are set by utilizing the practical tuning strategies of PI parameters; and after a Mamdani fuzzy reasoning algorithm and defuzzification processing are adopted, the variable quantities of parameter values of the PI controller are output, thereby realizing on-line correction of the PI parameters. By adopting the control method, the disadvantages of a traditional manual correction method for the PI parameters are overcome, and on-line real time correction of the PI parameters is realized, thereby improving the adaptability and the stability of the system.
Owner:HANGZHOU DIANZI UNIV
On-line monitoring and prediction of corrosion in overhead systems
InactiveUS20120053861A1Flow propertiesFluid pressure measurement by mechanical elementsSensor arrayDistillation
The present disclosure describes a method and system for estimating the onset of salt formation in an overhead fluid system. The method may include measuring parameters of a process stream by collecting data from one or more sensor arrays on an overhead line, such as from a distillation column, and then estimating the onset of salt formation corrosion using the data from the sensor arrays. The method may be implemented in real-time. The method may include transmitting data to monitoring facilities and / or sending instructions to alarms and / or regulators. Also described is a system for performing the method.
Owner:BAKER HUGHES INC
Strip steel tension dynamic control method based on loop quantity deviation and control system using strip steel tension dynamic control method
ActiveCN103920720ARealize dynamic controlHigh control precisionTension/compression control deviceControl systemStrip steel
The invention discloses a strip steel tension dynamic control method based on loop quantity deviation and a control system using the strip steel tension dynamic control method, and relates to a control device or method which is specially applicable to a metal rolling mill or products machined by the metal rolling mill, in particular to dynamic control of hot-rolled strip steel tension through a loop. The control system comprises a main transmission speed control module, a tension adjusting module and a tension set value correction module, a strip steel tension set value is corrected by computing loop quantity deviation between a target loop quantity and an actual loop quantity in real time and according to the loop quantity deviation, the strip steel tension set value is increased if the actual loop quantity is higher than the target loop quantity, the strip steel tension set value is decreased if the actual loop quantity is lower than the target loop quantity, tension moment is computed according to the corrected strip steel tension set value and transmitted to a torque adjuster of an electric loop, the strip steel tension is dynamically controlled, and the problem of internal deviation of strip steel in a frame or narrow reduction of the strip steel due to easy deviation of the actual loop quantity of the loop caused by fluctuation of technological parameters in constant tension control of an existing strip steel tension control system is solved.
Owner:BAOSHAN IRON & STEEL CO LTD
Low-speed and zero-speed rotor position observation method and device during fault-tolerant operation of synchronous motor
InactiveCN102075131AAccurate observationNo increase in hardware costVector control systemsDynamo-electric converter controlSynchronous motorLow-pass filter
The invention relates to a low-speed and zero-speed rotor position observation method and a low-speed and zero-speed rotor position observation device during fault-tolerant operation of a synchronous motor. The low-speed and zero-speed rotor position observation method during fault-tolerant operation of the synchronous motor is characterized in that: high frequency sine pulse voltage with fixed frequency is applied at a two-phase working winding end at partial time intervals, and the working winding generates corresponding high frequency current; and the high frequency current is synchronously acquired by a band-pass filter, a rotor position angle observation error function is calculated through links such as a multiplier, a low pass filter, an adder, a coordinate rotation transformation and the like, a value of the error function is sent to a proportional-integral (PI) regulator, and an observation value of the rotor position angle is output by the PI regulator. The invention is favorable for accurately observing the rotor position during the fault-tolerant operation of a three-phase salient pole synchronous motor under the condition that one phase of stator winding is open-circuit.
Owner:FUZHOU UNIV
Active floor vibration control system
An active vibration control system for controlling excessive or unwanted vibrations in floors or other structures. The system has three main components: (1) velocity sensor w / signal conditioner; (2) feedback controller; and (3) proof-mass actuator. This system works by creating a feedback loop that generates a control force proportional to the velocity, thus adding damping to the controlled modes of floor vibration. In other words, the feedback loop makes the moving mass of the actuator move to counteract the motion of the floor. The system is optimized such that the motor can be driven with a sinusoidal force where the peak force is at or near the full motor capacity at any frequency without exceeding the stroke while maintaining a simple and cost effective feedback controller. Additionally, a relationship between the fundamental natural frequency of the floor system and actuator is established to provide efficient and stable control.
Owner:PENN STATE RES FOUND
Method for implementing power system stabilizer
ActiveCN103296688ASolution rangeSolve the problem of conflicting effectsPower oscillations reduction/preventionPhase shiftedDifferential signaling
The invention discloses a method for implementing a power system stabilizer. The method includes steps of acquiring a rotation speed variable quantity via a blocking filter link according to the rotation speed and active power of a rotor of a power generator, and respectively acquiring low-band differential signals, medium-band differential signals and high-band differential signals via a differential filter; parallelly adding the low-band differential signals, the medium-band differential signals and the high-band differential signals together to acquire rotation speed variation comprehensive signals of the power generator; measuring phase-shift characteristics of the rotation speed variation comprehensive signals and the rotation speed and uncompensated phase-shift characteristics of an excitation control system of the power generator by a forced oscillation process, computing required phase-shift characteristics among the rotation speed variation comprehensive signals and the power system stabilizer, designing multi-order lead-lag link phase-shift parameters which are serially multiplied by one another, performing phase compensation to meet the required phase-shift characteristics; finally outputting signals of the power system stabilizer and superposing the signals of the power system stabilizer on a reference voltage of an excitation regulator of the power generator. The method has the advantage that active power low-frequency oscillation of the synchronous generator can be effectively suppressed.
Owner:NR ELECTRIC CO LTD +1
Control method and system for permanent magnet synchronous motor based on current prediction
InactiveCN102790575AImprove system stabilityRun efficientlyElectronic commutation motor controlVector control systemsPhase-locked loopPermanent magnet synchronous motor
The invention discloses a control method for a permanent magnet synchronous motor based on current prediction and belongs to the field of control over permanent magnet synchronous motors. The method mainly comprises the steps of predicting the improved current and identifying the sensorless rotating speed and a corner based on a phase-locked ring idea combined with the predicting step. According to the control method, the current of a motor stator is predicted ahead of a switch period according to the detected current of the motor stator and a current instruction; corresponding control voltage is predicted; and motor rotating speed and corner position information is identified according to the estimated counter electromotive force of the motor. The invention further provides a control system for realizing the control method. The control system comprises a rotating speed regulator, a current predicting unit, a counter electromotive force estimation unit, a controller and a space vector modulating unit. According to the control method and the control system disclosed by the invention, the permanent magnet synchronous motor can be enabled to still safely operate at high efficiency when the parameters change; and the control method and the control system have a favorable application prospect in the field of control over the permanent magnet synchronous motor.
Owner:HUAZHONG UNIV OF SCI & TECH
Vector control device for induction motor
InactiveCN101931361AObservation error increasesImprove low-speed performanceElectronic commutation motor controlVector control systemsControl vectorElectric machine
The invention discloses a vector control device for an induction motor and relates to a vector control device without speed sensor for the induction motor. The invention solves the problem of the vector control method of the conventional induction motor that a system is unstable in a low-speed power generation state and has a bigger rotating speed observation error under a low-speed condition because a rotating speed adaptive rate cannot guarantee the stability of an algorithm. In the invention, the speed of the motor can be observed by adding the exciting current error between the actual value and observed value of an exciting current and the product of a q axis stator magnetic chain observed value and a variable gain (M) into the general product of the observed current bias and the observed rotor magnetic chain and through a PI regulator; and thus, the speed of the motor can be controlled. The device reduces the low-speed performance of the system considerably and solves the unstable problem of the system in a power regeneration state effectively. The device is used for controlling the rotating speed of the induction motor.
Owner:哈尔滨同为电气股份有限公司 +1
Method and device for position sensorless control of permanent magnet synchronous motor
ActiveCN106533295AHigh precisionElectronic commutation motor controlElectric motor controlPermanent magnet synchronous motorPermanent magnet synchronous generator
The invention discloses a method and a device for position sensorless control of a permanent magnet synchronous motor. The method comprises the following steps: determining a current-mode stator flux linkage under a d-q coordinate system, then using a rotor position estimated last time as positional information to carry out reversed Park conversion on the current-mode stator flux linkage so as to obtain a current-mode stator flux linkage under an alpha-beta coordinate system; using a voltage-mode stator flux linkage in which a model deviation compensation controlled quantity is introduced to estimate a voltage-mode stator flux linkage under the alpha-beta coordinate system, wherein the compensation controlled quantity is output quantity, after regulated by a regulator, of deviation between the current-mode stator flux linkage and the voltage-mode stator flux linkage estimated last time; obtaining a rotor flux linkage under the d-q coordinate system according to the voltage-mode stator flux linkage; and using a phase-locked loop to lock the q-axis component of the rotor flux linkage to be zero, and estimating the rotor position and velocity information of the permanent magnet synchronous motor, so that high-precision rotor position and velocity information can be obtained in a full range of speed.
Owner:SUNGROW POWER SUPPLY CO LTD
Target value processing unit, temperature controller, control process implementing system, process controlling method, target value processing program, and recording medium
InactiveUS20050192681A1High control precisionSimple systemAnalogue computers for vehiclesDigital data processing detailsTemperature controlControl treatment
A target value processing unit, includes: an input section to which a target value signal showing a target value of a control process is inputted; a target value shaping unit shaping the target value signal inputted to the input section, into a signal form which is proper for a control treatment of a regulator implementing the control process; and an output section outputting to the regulator a shaped target value signal which is shaped by the target value shaping unit. The target value processing unit realizes the high-level control process without improving the regulator.
Owner:ORMON CORP
Method for Processing Data Relating to a Cylinder of Fluid under Pressure
InactiveUS20090040049A1Vessel mounting detailsGas handling applicationsInformation processingGas cylinder
Method for processing at least one piece of data relating to a transportable cylinder of gas under pressure or a set of cylinders of this type (pallet of cylinders), characterized in that the said method comprises stages consisting in:transmitting a radio frequency signal containing the said data;receiving the said radio frequency signal and extracting the said data from it;measuring the strength of the signal received and deducing from this information about the location of the said cylinder or set of cylinders; andprocessing the said data as a function of the said location information,the said radio frequency signal being transmitted by an electronic module fitted to the cylinder or to equipment intended to be connected to the cylinder(s), including: a valve, a regulator, and / or a gas panel.
Owner:LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
Semi-closed single communication pipe type bridge deflection test device and method
ActiveCN101451903AOvercoming Viscous Damping ForceOvercome the capillary effectUsing fluid meansPressure difference measurement between multiple valvesData acquisitionEngineering
The invention provides a bridge deflection monitoring device and a method. A non-deformation part of an abutment is set as an initial measuring point, then each girder measuring point is arranged in turn along a deformed girder, a measuring point device mounting bracket at each measuring point is fixed with a same gas column adjuster, the initial measuring point is not provided with a liquid column adjuster, the measuring point device mounting bracket at each measuring point of each girder is fixed with the same liquid column adjuster, the front end of each branched communicating pipe injected with liquid is connected to the gas column adjuster of a prior measuring point and the back end thereof is connected to the liquid column adjuster of a next measuring point, each gas column adjuster is connected to one pole of an air pressure difference sensor of respective measuring point through a connecting pipe, and each air pressure difference sensor is fixed on the measuring point device mounting bracket of respective measuring point, transmits test data to a data acquisition system through a signal transmitting device, and converts the test data into a deflection value of each measuring point of a bridge according to a conversion relation between pressure and deflection.
Owner:CHINA RAILWAY BRIDGE SCI RES INST LTD +1
On-line monitoring device and method of weighting sensors
InactiveCN101526392AAvoid lostImprove reliabilityWeighing apparatus testing/calibrationControl signalSwitching signal
The invention relates to an on-line monitoring device and method of weighting sensors, which are suitable for the on-line monitoring of troubles of the weighting sensors in a weighing system. The on-line monitoring device comprises a sensor unbalance loading regulator, a signal switcher, a warning indicator and a power supply circuit, wherein the sensor unbalance loading regulator is connected with the weighting sensors; the signal switcher is connected with the sensor unbalance loading regulator, a signal detector and a weighing meter; and the warning indictor is connected with the signal detector. The on-line monitoring method is as follows: when the weighing system is weighed, the signal detector controls the signal switcher to switch signals, collects a signal value of each weighting sensor one by one and judges the troubles of the weighting sensors by contrastively analyzing weighing signal values. The invention solves the problem that the troubles of the weighting sensors can not be discovered in time because weighing signals are connected together in parallel and then sent to the weighing meter, thereby enhancing the reliability and the measuring precision of the weighing system. The invention has the advantages of compact and reasonable structure, simple and convenient operation, high reliability, easy maintenance and long service life.
Owner:SAIMO ELECTRIC
Self-balance control method of movable type inverted pendulum system and self-balance vehicle intelligent control system
InactiveCN103753557AImprove stabilityImprove reliabilityProgramme-controlled manipulatorMovable typeEquilibrium control
The invention discloses a self-balance control method of a movable type inverted pendulum system. State signals of the movable type inverted pendulum system are collected, the filter processing data method with the combination of a wavelet topology network and a regulator is adopted, a signal fusion technology is used for assistance, input data, middle data and output data of each filter node where effective values of the wavelet network enter are continuously adjusted, the controlled system control number output by the system is completed, the stability and the reliability of work of an inverted pendulum are improved, and the driving and riding stability, safety and comfort of an electric riding tool based on the inverted pendulum system are improved. The invention discloses a self-balance vehicle intelligent control system. By the adoption of a filter processing unit and a signal fusion unit, the capacity of combined control and information feedback of an electrical system and a mechanical system are improved, tiny disturbance generated in the movement process of a self-balance vehicle is reduced, the intelligent degree is improved, the self-balance vehicle intelligent control system is convenient and easy to use, comfortable, stable and capable of reducing cost and improving the cost performance.
Owner:SHANGHAI CHUANGHUI ROBOT TECH
Fattening pig house environment regulation and control system and method
InactiveCN109634098AImprove control qualityInhibit bad effectsControllers with particular characteristicsControl systemEngineering
The invention discloses a fattening pig house environment regulation and control system and method. The system comprises a detection unit, a control unit and a monitoring center. The detection unit detects temperature, humidity, air flow and ammonia of a fattening pig house. The control unit controls control equipment through utilization of PI secondary regulators. The monitoring center circularlyreads temperature, humidity, air flow and ammonia parameters of a fattening pig house environment collected by the detection unit, designs a single-neuron adaptive PSD controller+ a neuron decouplingcompensator to form a fattening pig house environment master regulator for the temperature, the humidity, the air flow and the ammonia, and realizes effective control over the temperature, humidity,air flow and ammonia of the fattening pig house environment. The detection unit detects the temperature, humidity, air flow and ammonia of the fattening pig house through utilization of sensors. Inputof the PI secondary regulators of the control unit comes from output of the neuron decoupling compensator of the monitoring center, thereby forming a multi-cascade control system of the master and secondary regulators.
Owner:JIANGSU UNIV
Weight-per-meter measuring device and method for fabric setting
InactiveCN101021042AManual control error is largeImprove efficiencyInspecting textilesHeating/cooling textile fabricsAutomatic controlDisplay device
The present invention discloses weight-per-meter measuring device and method for fabric setting, and relates to detection technology. The weight-per-meter measuring device includes one electronic weighing instrument, one electronic length instrument, one operating and regulating unit, a display, a printer and a computer with corresponding software. Under the control of the computer, the weight-per-meter measuring device measures the length and the weight of the set fabric, calculates the square weight, compares with the standard amount and regulates. The present invention has easy manufacture, high precision, fast regulation, automatic control, high efficiency and other advantages.
Owner:上海好力纺织机电设备有限公司
Regulation control of wind generator set
The invention provides an adjustment and control method for a windmill generator, which comprises a generator unit and an adjuster. An active speed loss adjustment windmill generator unit is adopted; speed loss feature is adopted for a blade; blade space variation adjustment is adopted for the adjustment system. At low wind speed, the distance between blades can be adjusted to the position for acquiring maximal power and the adjustment of blade distance angle optimizes the power output of the machine unit. When the power produced by the windmill generator unit exceeds the rated power, the distance of blades actively adapts to the direction of speed loss and harnesses the power within the rated value and limit the maximal power output of the machine unit. Along with the continuous change of wind speed, the blades need only to be finely tuned to maintain the state of speed loss. During braking, the blades can be adjusted to resemble the effect of pneumatic braking, thereby greatly reducing the impact on a transmission system from mechanical braking.
Owner:苏州市南极风能源设备有限公司
Method and system for fuzzy control over genetic algorithm optimization of shielded gate portal crane controller
The invention provides a method and system for fuzzy control over genetic algorithm optimization of a shielded gate portal crane controller. A reference rotation speed value n* and a brushless direct current motor measuring rotation speed value n serve as two input values of a fuzzy controller for genetic algorithm optimization; a current output by the fuzzy controller and a current output by a current sensor are input into a current comparator, an error current passes through a current PID regulator and is output to a PWM controller, and finally, the PWM controller controls the rotation speed of a motor through an inverter. By the adoption of rotation speed current double-closed-loop control, double-fuzzy control over genetic algorithm optimization is adopted by a rotation speed outer ring and traditional PI control is conducted on the currents. Compared with the prior art, the method and system for fuzzy control over genetic algorithm optimization of the shielded gate portal crane controller have the advantages that the tracking accuracy is high, the robustness is strong, parameter adjustment can be effectively conducted on system parameter drifting, the function of self-adaptation control is achieved, and the obvious superiority is achieved.
Owner:江苏新绿能科技有限公司
Control loop and method of creating a process model therefor
InactiveUS20090182441A1Good predictionGood approachSampled-variable control systemsDigital computer detailsProcess engineeringModel selection
In a control loop for regulating a combustion process in a plant having a controlled system for converting material by way of the combustion, with at least one flame body being formed, the control loop having at least one observation device for imaging the flame body and further sensors to determine the state variables describing the state of the system in the plant, at least one regulator and / or a computer to evaluate the state variables and select suitable actions based on a process model, and adjustment devices for at least the supply of material and / or air that can be controlled by the actions, the process model provides specialized function approximators for various process dynamics, one of which function approximators is selected by a selector, and a regulator assigned to the selected function approximator is used to regulate the control loop.
Owner:POWITEC INTELLIGENT TECHNOLOGIES GMBH
Method for time synchronization in a communication network
InactiveCN102754369ATime-division multiplexGenerating/distributing signalsKaiman filterComputer network
Owner:SIEMENS AG
Inverter fan control method and device
ActiveCN106438433AAvoid failure to startReduce consumptionEngine controlPump controlCooling powerComputer engineering
The invention discloses an inverter fan control method. Due to control over the rotating speed of a fan, the power of a current inverter and a temperature preset value of a cooled power device are integrated, when the inverter is at the first temperature preset value, the fan can obtain a first fan rotating speed instruction related to the real-time power. When the highest temperature of the cooled power device is larger than the second temperature preset value, a second temperature preset value is adopted as a target, and a second fan rotating speed instruction is formed through a temperature regulator so as to perform closed-ring control over the temperature of the cooled power device. After the first fan rotating speed instruction and the second fan rotating speed instruction are added, a fan rotating speed driving instruction is formed. The invention further provides a device corresponding to the fan control method. On the basis of the first fan rotating speed instruction, the phenomena that when the temperature of the power device does not reach the preset value during operation of the inverter, the fan cannot be started and the inverter is in the heated and baked state all the time can be avoided; on the basis of the second fan rotating speed instruction, the fan can overlay rotating speed increment generated by increase of the temperature on the basis of the first fan rotating speed, and the rotating speed can be automatically adjusted according to environmental temperature.
Owner:NR ELECTRIC CO LTD +2
Displacement estimating method and suspension control system for bearingless synchronous reluctance motor
ActiveCN102545744ALow costAvoid defectsVector control systemsDynamo-electric converter controlSynchronous reluctance motorReference current
The invention discloses a displacement estimating method and a suspension control system for a bearingless synchronous reluctance motor. When the suspension control system which is constructed on the basis of the displacement estimating method disclosed by the invention is applied, firstly, a two-phase winding differential voltage is acquired and equivalently obtained on the basis of a differential voltage detection model; then a rotor displacement estimated value is obtained by utilizing a displacement estimator; a reference value of a suspension force is output by a closed-loop regulator; an expanded suspension force / current modulator outputs a suspension winding two-phase reference current to an expanded SPWM (Silent Pulse Width Modulation) inverter after operating the suspension force reference value and a torque winding three-phase voltage and current detection value which are used as input signals; and finally, a three-phase suspension winding is supplied with power by utilizing the expanded SPWM inverter, so that the suspension force control can be implemented and meanwhile, a high-frequency voltage signal is provided for estimation of the rotor displacement. According to the invention, not only can the stable suspension of a rotor be implemented, but also the rotor displacement can be accurately estimated and excellent control performance is achieved.
Owner:江苏扬先科技有限公司
Temperature control method and temperature control system
ActiveCN106873663AContinuous currentImprove efficiencyTemperatue controlTemperature controlDuty cycle
The invention provides a temperature control method and a temperature control system to solve the problem that the temperature control circuit is of large volume in the prior art. The method comprises the following steps: collecting the current temperature of a controlled object; if the current temperature is higher than a preset temperature, outputting a first PWM control signal to cool the controlled object; judging whether the temperature of the controlled object can reach the preset temperature; if the temperature of the controlled object can reach the preset temperature, cooling the controlled object constantly; if the temperature of the controlled object cannot reach the preset temperature, enabling the duty ratio of the first PWM control signal to be 100%, and controlling the output voltage of a DC voltage regulator module to cool the controlled object; if the current temperature is lower than the preset temperature, outputting a second PWM control signal to cool the controlled object; judging whether the temperature of the controlled object can reach the preset temperature; if the temperature of the controlled object can reach the preset temperature, cooling the controlled object constantly; and if the temperature of the controlled object cannot reach the preset temperature, enabling the duty ratio of the second PWM control signal to be 100%, and controlling the output voltage of the DC voltage regulator module. The scheme ensures that a heating / cooling device works with high efficiency.
Owner:11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
Permanent magnet synchronous motor model-free prediction control method based on extended state observer
InactiveCN110912480AImprove dynamic performanceImprove steady state performanceElectronic commutation motor controlVector control systemsVoltage vectorReference current
The invention relates to a permanent magnet synchronous motor model-free prediction control method based on an extended state observer, and the method comprises the steps: A, estimating unknown and disturbance parts of a system through employing a linear extended state observer, and not relating to motor parameters; and B, enabling the motor reference current vector and the feedback current vectorto pass through a permanent magnet synchronous motor model-free controller based on an extended state observer, obtaining a reference voltage vector by using a complex vector current regulator, and obtaining six paths of switching signals of an inverter after PWM modulation, thereby realizing control of the motor. According to the invention, the problems of large motor noise, steady-state torque,large current ripple, static current difference and poor system control performance in a traditional model prediction control scheme when motor parameters are inaccurate are solved.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
Fore-aft position adjuster utilizing active material actuation
InactiveUS8052112B2Efficient releaseReduce noiseOperating chairsDental chairsLocking mechanismEngineering
Owner:GM GLOBAL TECH OPERATIONS LLC
Claims adjuster allocation
A central claims adjuster control unit associated with an entity may oversee the assignment of claims cases to claims adjusters. The control unit may designate that a threshold number of cases may be assigned to certain claims adjusters. When new claims cases arrive, the control unit may monitor the workload of each of the claims adjusters and the threshold value assigned to any of the claims adjusters before assigning the case to one of the adjusters. If no adjuster is available, the control unit may store the case(s) in a memory until one of the adjusters becomes available. An additional feature of the control unit includes a user interface for modifying information about claims adjusters, including whether or not a threshold value is associated with them, the value of any associated threshold, and the reassignment of cases from one adjuster to another.
Owner:ALLSTATE INSURANCE
Layered exploitation control method for petroleum and magnetic control bottom-hole regulator
InactiveCN103244084AEasy to operateReduce operating costsFluid removalControl signalElectrical battery
The invention relates to a layered exploitation control method for petroleum. Steel balls of specified quantity are put in a pit to serve as control signals so as to respectively control bottom-hole regulators installed on every petroleum production layer to achieve layered control. Controllers are axially arranged in magnetic control bottom-hole regulator casings. Every controller comprises a power switch (3), an induction coil (4), a high energy battery (5), a controller circuit board (6), a screw rod transmission pair (7), a driving motor (8) and a valve core (9). The controller circuit board (6) receives steel ball signals sensed by the induction coil (4) and controls the driving motor (8) to rotate, the valve core (9) is driven through the screw rod transmission pair (7) to axially slide up and down so as to open or close a bottom-hole regulator hole in radial communication with the inside and the outside of the bottom-hole regulator, and layered control is achieved. The method has the advantages that the method is simple to operate, low in operation cost and high in operation reliability and errors do not occur easily. In use, the bottom-hole regulators are installed on every petroleum production layer of a petroleum well and can be independently controlled to achieve layered petroleum exploitation.
Owner:MUDAN LANTIAN GASOLINEEUM EQUIP
Automatic control device for glue coating amount of automatic part and control method
PendingCN107812674AAutomatic control is reliableRapid responseLiquid surface applicatorsCoatingsMicrocomputerAutomatic control
The invention belongs to the technical field of control over the glue coating quality and glue coating amount of automatic parts and particularly relates to an automatic control device for the glue coating amount of an automatic part and a control method. The automatic control device for the glue coating amount of the automatic part comprises a microcomputer, an exchanger, an adjuster, a glue coating camera, a glue amount executing mechanism and a glue coating manipulator. The control method of the automatic control device for the glue coating amount of the automatic part comprises the steps that firstly, a target parameter of the glue tape width, a target parameter of the glue tape thickness and a glue outlet state parameter adjusting scheme are set, and an initial value of a glue outletstate parameter and a target glue coating amount parameter of the glue amount executing mechanism are obtained; secondly, a corresponding signal of glue outlet preparation completion is transmitted tothe glue coating manipulator; thirdly, the glue amount executing mechanism starts glue outlet; fourthly, an image signal is sent to the microcomputer; fifthly, the current glue coating amount is obtained; sixthly, the glue outlet state parameter is adjusted; and seventhly, the glue outlet state is changed. The circulating time of the working process is smaller than 500 microseconds, the responseis rapid, and it is ensured that automatic control over the glue coating amount is stable and reliable.
Owner:SHENYANG LIGONG UNIV
Electronic regulator model for water turbine adjusting system
ActiveCN105470953AImprove versatilityRealize a frequency modulation functionFlicker reduction in ac networkWater turbineElectric power system
The invention provides an electronic regulator model for a water turbine adjusting system. The model has an openness control mode, a power control mode and an isolated-network control mode. The openness control mode or the power control mode can be manually selected as a control mode of a normal grid-connected unit. The openness control mode or the power control mode can be automatically switched with the isolated-network control mode. The power control mode has two sets of PID control parameters which can be automatically switched. The electronic regulator model is clear in structure and strong in universality, the parameter meaning of the model is definite, and the parameters can be conveniently obtained through measurement on site. The modeling process is efficient, the precision is high, and the actual control function can be accurately simulated, so that the actual engineering demands can be satisfied. Moreover, the universality of model application is improved. The meaning of the control parameters of the model is clear, and the parameters are conveniently obtained through a field test, so that the model has actual engineering application value. A reliable and accurate basis is provided for stable analysis and calculation of an electric power system, so that the stability of the electric power system is ensured.
Owner:CHINA ELECTRIC POWER RES INST +4
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