591 results about "Regulator" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention relates to a measurement and control system with discriminative tracking for the temperature of a high-temperature resistance furnace and a monitoring method thereof. The invention comprises the following steps: symmetrically and uniformly dividing a heating space of a hearth of the high-temperature resistance furnace into a plurality of heating subareas, arranging a resistance heating element in each subarea, and arranging a main loop unit of a heating power supply, a high and low temperature discriminative measuring and transmitting unit, and a high and low temperature control loop unit in each heating subarea in a matching way. The high and low temperature discriminative measuring and collecting mode of the measurement and control system overcomes the defect that wiring and signal types cannot be complementary to each other caused by different signal types of high and low temperature measurement in instrument control, and by using an undisturbed switching method with a threshold value, a power regulator can smoothly and continuously output control signals in high and low temperature switching so as to eliminate mutations, jumps and discontinuity of the control output due to different temperature measurement means and ranges for high and low temperatures, and improve the accuracy and reliability of single-area temperature control.

The invention provides a cold-strip steel bidirectional deviation correction control system which is a continuous closed-loop system formed by a strip steel deviation detection device, an accrued deviation correction angle calculator A, a reverser, a forward/reverse selector, an oil tank position detection device, an actual deviation correction angle calculator B, a proportional integral regulator, a servo valve and an oil tank. The system realizes the control function of bidirectional deviation correction of the strip steel.

The invention relates to a transverse control method for an automatic driving truck, and the method comprises the following steps: S100, receiving an input reference track, finding a track point closest to the truck, and calculating a tracking error; S200, the tracking error serving as a state variable of the linear quadratic regulator to be input into an LQR closed-loop feedback controller, and obtaining output of a linear quadratic regulator controller; inputting the reference track into a model reference self-adaptive controller to obtain model reference self-adaptive controller output; s300, combining the output of the linear quadratic regulator controller and the output of the model reference adaptive controller to obtain a steering wheel instruction, and sending the steering wheel instruction to a drive-by-wire system of the truck; and S400, cycling the steps S100-S300, so that the output of the truck is consistent with the expected output. The invention further provides a transverse control system of the automatic driving truck. Through LQR+MRAC, the robustness of the control algorithm can be greatly improved, so that the truck still has good stability under different loadsand special working conditions.

The invention discloses a control method and a control device for improving the operating efficiency of material handling equipment of bell type furnace units of steel enterprises, which are mainly realized by a data acquisition device 1, a data processor 2, a control proposal generator 3, a production process simulator 4 and a control information uploader 5 through a network (TCP/IP) 6. The data processor is used for performing deep-level analysis and processing on acquired information, and inputting and transferring into the control proposal generator; a crane control proposal generator comprises two modules, namely a resource allocation proposal generator 9 and a crane operation proposal regulator 10, the resource allocation proposal generator allocates limited resources of a bell type furnace workshop, and the crane operation proposal regulator performs concrete execution on a resource allocation result and can perform further regulation on the allocation of the resources; the production process simulator simulates the operating environment of the bell type furnace production workshop, performs dynamic simulation on the production flow of a bell type furnace and the operation of a crane, and displays the dynamic simulation through an LED display 8; and the control information uploader is used for uploading control information produced by the crane control proposal generator to a crane control terminal 7 of the bell type furnace workshop and guiding the production of the bell type furnace workshop.

The invention discloses a control method and a control system for a permanent magnet synchronous motor using a large moment of inertia. The control method comprises the following steps: 1) calculatingthe actual rotational speed of the motor, and calculating the torque current and the excitation current of the motor; 2) comparing the actual rotational speed with a preset rotational speed to obtaina deviation value, and outputting a current reference value via a speed regulator; 3) according to the motor speed increase and deceleration states, executing corresponding inertia compensation strategies; 4) comparing a torque current with the reference value of the torque current adjustment to obtain a comparison value, and then obtaining the output values of the AC and DC voltages via a current regulator; 5) obtaining the reference values of the AC and DC voltages; and 6) performing a space vector algorithm based on the reference values of the AC and DC voltages to obtain a PWM drive signal, and controlling the operation of a three-phase inverter bridge drive motor. Based on the double-loop vector control of the rotational speed current, the voltage feedforward decoupling and the moment of inertia feedforward control are designed to compensate the motor current in real time, which accelerates the dynamic response to the large moment of inertia load and improves the accuracy and rapidity of permanent magnet synchronous motor control system.