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41 results about "Integral windup" patented technology
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Integral windup, also known as integrator windup or reset windup, refers to the situation in a PID feedback controller where a large change in setpoint occurs (say a positive change) and the integral terms accumulates a significant error during the rise (windup), thus overshooting and continuing to increase as this accumulated error is unwound (offset by errors in the other direction). The specific problem is the excess overshooting.
Improved fast reflecting mirror disturbance observation compensation control method based on multi-closed loop
InactiveCN106814624AImprove disturbance suppression abilityReduced disturbance suppression residualsAdaptive controlControl systemStabilization control
The invention discloses an improved fast reflecting mirror disturbance observation compensation control method based on multi-closed loops, and solves the problems that an existing fast reflecting mirror stabilized platform is poor in low frequency disturbance inhibition capability, and cannot satisfy higher precision stabilization control system demands; the method can improve a conventional disturbance observer on the multi-closed loop control basis, thus moving forward compensation nodes, using an acceleration controller to simplify a disturbance compensation object, smartly avoiding the system low frequency compensation capability deprivation problems caused by twice integral windup in a conventional compensation controller, and strongly improving the system low frequency disturbance observation compensation inhibition capability; the method can optimize the system on the control algorithm, and no extra sensor is needed, thus ensuring the system original characteristics, and saving cost; in addition, the method can simplify the control structure, and can be easily realized in engineering.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Intelligent integration method for anti-integral windup and overshoot suppression of PID (Proportional, Integral and Derivative) control system
ActiveCN104252135AGuaranteed stabilityNot low stabilityAdaptive controlControl signalIntegral action
The invention discloses an intelligent integration method for anti-integral windup and overshoot suppression of a PID (Proportional, Integral and Derivative) control system. The intelligent integration method comprises the following steps: according to a set input valve r(t) and an output value y(t) of the system, calculating an error signal value e(t); judging whether an actually input signal of a controlled object has a measured value v(t) or not: when the actually input signal of the controlled object has the measured value v(t), calculating an executor over-limit signal x(t) according to a control signal u(t) output by a controller and the measured value v(t), and when the actually input signal of the controlled object does not have the measured value v(t), setting an executor limit value; setting an anti-integral windup parameter alpha for an integral error signal to eliminate system oscillation caused by executor over-limit; setting an overshoot suppression parameter beta for the integral error signal to suppress system step response overshoot caused by an integral action. The intelligent integration method for anti-integral windup and overshoot suppression of the PID control system not only can resist windup and suppress overshoot, but also does not change the original system stability, and has the advantages that the parameters are simple to set and the real-time high-accuracy quick control of the control system is easy to realize.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
Saturated self-adjusting controller for time-varying delay uncertain system
The invention discloses a saturated self-adjusting controller for a time-varying delay uncertain system. The controller comprises three parts, namely a self-adjusting limiter, a conventional PID controller and an anti-integral saturator, wherein the conventional PID controller generates a control command uc(t) according to the offset of the controlled parameter y(t) and a target value r(t) thereof; the self-adjusting limiter calculates a steady-state gain K of a time-varying delay uncertain object under the corresponding working condition under the driving of a working condition variable s(t), dynamically generates a limiting value according to the K and r(t), timely limits the uc(t) and generates a final control function u(t); and the anti-integral saturator limits the integral function in the PID controller according to the offset of the uc(t) and u(t) in order to solve the possible integral saturation problem. By applying the invention, an engineering technician can conveniently apply effective control to a class of time-varying delay uncertain systems widely present in the process industry on an industrial control system (device) or in the mode of combining a hardware circuit with software programming so as to improve the safety and operating level of the production process.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
PMSM stator flux linkage observation method based on extension flux linkage observer
ActiveCN103346726AAvoid problemsReduce orderElectronic commutation motor controlVector control systemsIntegratorMathematical model
The invention discloses a PMSM stator flux linkage observation method which is characterized in that an extension flux linkage observer is established according to a motor stator voltage phasor u alpha beta, a stator current phasor i alpha beta and a rotor electric angular speed omega in a two-phase static coordinate system (alpha beta coordinate system for short), on the basis of the theory of a state observer and according to a mathematical model of the PMSM in the alpha beta coordinate system, the motor stator voltage phasor u alpha beta, the stator current phasor i alpha beta and the rotor electric angular speed omega are obtained through collection and calculation, and then the relation between the stator flux linkage and the extension flux linkage is utilized for observing a rotor flux linkage psis. According to the PMSM stator flux linkage observation method, the problem of direct-current bias and integral saturation caused by the pure integral stator flux linkage observation method can be solved, the problems of the amplitude value and phase deviation or waveform distortion caused by an improved integrator are solved, and the advantage that parameters of the pure integral stator flux linkage observer are good in robustness is reserved. Due to the fact that only a minimum-order observer is required, engineering practice is benefited. The stator flux linkage observation method can be applied to a surface-mounted-type SPMSM and an inserted-type SPMSM and have the advantage of being good in universality.
Owner:黄山市开发投资集团有限公司
Unsymmetrical fault ride-through method of double-fed wind generating set
ActiveCN103904685AOvercoming reactive support requirementsImprove fault ride-through capabilitySingle network parallel feeding arrangementsReactive power adjustment/elimination/compensationOvervoltageOvercurrent
The invention discloses an unsymmetrical fault ride-through method of a double-fed wind generating set. According to the method, a rotor-side convertor control circuit comprises a rotating speed outer ring and a rotor positive and negative sequence current control inner ring, and in order to eliminate the influence of direct-current decrement of a stator flux linkage, a corresponding compensation item is introduced at an outlet of a positive sequence current controller; in order to avoid the overcurrent or overvoltage of the rotor convertor, a novel current amplitude limiting link is designed, and an integral saturation link and an output amplitude limiting link are respectively introduced for the current controller; according to a network-side convertor, actual active power of a rotor is introduced in an outer ring direct-current voltage circuit to balance power on the two sides of a direct-current bus in real time; meanwhile, actual measurement negative sequence network voltage is an inner ring positive sequence current control circuit to eliminate the influence of negative sequence voltage. The defect that an existing control strategy cannot take the influences, on the network-side / rotor-side convertor, of occurrence of the generator terminal negative sequence voltage and the requirement for idle supporting of a power network in the failure period into account at the same time yet is overcome, and therefore the fault ride-through capacity of the double-fed wind generating set is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Control method of integral saturation resistance in auxiliary machine failure load reduction process
ActiveCN102591201AMaintain securityReduce loadControllers with particular characteristicsSafe operationPower unit
The invention discloses a control method of integral saturation resistance in the auxiliary machine failure load reduction process, which is characterized in that a RB (Radio Beacon) signal is not adopted to trigger; two amplitude limiters are additionally arranged in front of a hand-operated device; triggering is carried out through comparing a command with the output of an auxiliary machine; when an auxiliary machine at the other side trips or fails, and the auxiliary machine at the side is in an automatic state; the output at the side is suddenly increased; within the scope allowed by the output of the auxiliary machine at the side, the integral saturation resistance action is not generated; and if the output at the side is exceeded, an integral saturation resistance function is generated till the integral saturation is eliminated. The control method has the beneficial effects that when an auxiliary machine of a thermal power unit fails, the load can be quickly and effectively reduced; within a period of time before reset in the RB process, if the auxiliary machine fails or parameters are improperly set, the integral saturation resistance function can also be generated through the design; and when the output of the auxiliary machine is larger and is lower than the maximum output of the auxiliary machine at the single side, the RB signal cannot trigger a controller to track, so that the oscillation of a system is prevented; and the safe operation of the auxiliary machine is favorably maintained.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
Design method for PAC controller based on intelligent control algorithms
InactiveCN105759607AHigh control output precisionAvoid heavy computationAdaptive controlForward algorithmNetwork communication
The invention discloses a design method for a PAC controller based on intelligent control algorithms. On the basis of a conventional PAC controller, the invention can improve the control accuracy and control response, and meet higher control requirements by using intelligent control algorithms such as an improved PID control algorithm, a variable universe fuzzy PID control algorithm, a PID control algorithm based on a neural network. In an aspect of network communication, the Ethernet, CAN bus and other means of communication are added on the basis of conventional serial ports 232 and 485, and Modbus-RTU, Modbus-TCP, CANopen, custom protocols and so forth are used for achieving network interconnection. An integral windup prevention algorithm, an algorithm for differentiation of control variables, a differential forward algorithm and the like are added on the basis of a conventional PID, the PID effect can be significantly improved, the response speed is increased, and the control overshoot is reduced.
Owner:BEIJING UNIV OF TECH
H-infinity control with integrator compensation for anode pressure control in a fuel cell stack
ActiveUS7087335B2Improve performanceEasy to operateFuel cell auxillariesSolid electrolyte fuel cellsIntegratorCost Controls
Pressure control in a fuel cell is achieved by using an H-infinity controller coupled in a feedback loop between a reactant feed gas valve and a pressure sensor on gas flows to the membrane electrode assembly of the fuel cell. To maintain pressure balance across the membrane, the pressure of the oxidant reactant is used to regulate fuel reactant flow. An integrator windup compensator manages integral windup in the H-infinity control scheme. Control weight, sensor noise weight, and performance weight matrices are incorporated into the H-infinity control model. Respective to PID control, the H-infinity model provides superior performance in the presence of high frequency feedback noise enabling use of low cost control components in the fuel cell and a minimum of EMI shielding.
Owner:GM GLOBAL TECH OPERATIONS LLC
Method and system for measuring errors of electromagnetic type mutual inductor based on digital signal processing
ActiveCN103543431AOvercoming demandsOvercome the shortcomings of slow responseElectrical measurementsDigital signal processingSignal processing circuits
The invention discloses a method and system for measuring errors of an electromagnetic type mutual inductor based on digital signal processing. Detected signals are acquired through a first sampling circuit unit, standard signals are acquired through a second sampling circuit unit, and the detected signals and the standard signals are combined through an amplifying circuit unit and an automatic gain control circuit unit to improve a signal-to-noise ratio, and are converted into digital signals through an AD converter unit, sampling analysis is carried out on the digital signals output by the AD converter unit by respectively adopting corresponding algorithms through an FPGA digital signal processing circuit unit, the amplitude value of a fundamental wave is found out, and a ratio error and a phase difference are obtained through the solution of a division formula. The errors of the electromagnetic type mutual inductor are measured. The method and system are high in processing speed, free of an integral windup effect, simple in achievement, stable in operation, light, high in precision, good in linearity and wide in measurement range, overcome the defects that a traditional mutual inductor measuring device is high in signal requirement and slow in response, and have practical significance in the detection and calibration of an existing electromagnetic type mutual inductor.
Owner:JIANGSU JINGJIANG INSTR TRANSFORMER FACTORY
Improved integral separation type PID control method
InactiveCN102591202APrevent control amountQuick responseControllers with particular characteristicsLower limitLimit value
The invention discloses an improved integral separation type PID control method, belonging to the field of the PID control. Because the upper limit value umax and the lower limit value umin of the theoretical output value are set, too large or small control amount can be avoided. Even if the integral saturation phenomenon occurs, the overshoot can exit quickly due to less integral accumulation, and hereby the response speed of the overshoot is increased and the overshoot is reduced. In addition, the increment delta P of the theoretical output value and the difference delta U of the theoretical output value and the set threshold value are calculated, and the increment delta P is compared with the difference delta U: the smaller one of the increment delta P and the difference delta U is compared with xi if the overshoot phenomenon is possible to occur, wherein, the integral coefficient ki is easy to be neglected at the moment and the occurrence of overshoot is prevented hereby, and the smaller one of the increment delta P and the difference delta U is compared with the xi if the static errors of the system are likely difficult to be eliminated, wherein the integral coefficient Ki is easy to be considered at the moment and the static errors of the system are easy to be eliminated hereby. The improved integral separation type PID control method can also realize the positive and negative adjustment, thus the adjustment precision of the system can be improved.
Owner:重庆安谐新能源技术有限公司
Small fixed-wing UAV attitude control method based on H infinite loop forming algorithm
PendingCN110377043AHigh steady state accuracyImprove dynamic performanceAttitude controlIntegratorLow-pass filter
The invention discloses a small fixed-wing UAV attitude control method based on an H infinite loop forming algorithm. A fixed-wing UAV attitude controller is designed by combining related knowledge ofthe classical control theory and the modern control theory. A control loop includes a PID controller, a low pass filter, an anti-integrator saturator, and an H infinite controller. The PID controlleris arranged at a forward channel to increase the low frequency gain of the system and reduce the steady state error. The low pass filter is applied to a feedback channel and is mainly used for suppressing high frequency noises in UAV sensor data. The anti-integrator saturator is used for preventing the flight performance from being affected by output saturation of the steering engine. The H infinite controller is used for improving the attitude control robustness of the UAV. Therefore, the fixed-wing UAV can keep the high robustness in a complicated environment or on the condition of changingparameters of the UAV; and the error of command tracking is reduced and the control accuracy is enhanced.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Dynamic integration compensation method and system based on motor PI control, and vehicle
InactiveCN107181440AImprove control stabilityImprove securitySpeed controllerElectric machinesControl systemReference current
The invention provides a dynamic integration compensation method and system based on motor PI control, and a vehicle. The method comprises: a reference current is inputted into a motor control system and a feedback current of the motor control system is collected, and an error is controlled based on the reference current and the feedback current; before PI control by the motor control system, an upper integral saturation limit value and a lower integral saturation limit value are calculated according to a stored output value of the motor control system at the last time; the motor control system performs PI calculation to obtain a current output value of the motor control system; and dynamic integration compensation is carried out according to the current output value of the motor control system, the upper integral saturation limit value and the lower integral saturation limit value. Therefore, the output change rate of the system can be suppressed and system security and stability can be improved.
Owner:BORGWARD AUTOMOTIVE CHINA CO LTD
Rotor resistance and stator resistance online identification method for induction motor used for low speed electric vehicles
InactiveCN108631677AResolve offsetSmall amount of calculationElectronic commutation motor controlVector control systemsLow speedElectric vehicle
The invention provides a rotor resistance and stator resistance online identification method for an induction motor used for low speed electric vehicles. The identification for rotor resistance and the identification for stator resistance are realized based on an improved rotor flux linkage model and an improved stator flux linkage model respectively, and the identification precision is improved through interactive updating of the rotor resistance and the stator resistance. The rotor flux linkage voltage model is optimized by using a high-pass filter with variable cut-off frequency on the basis of the advantages of the rotor flux linkage model, so that the problems of direct current bias and integral saturation caused by a pure integral link are effectively avoided. Moreover, based on theonline identification of the improved stator flux linkage model for stator resistance, the identified stator resistance is fed back to the rotor flux linkage voltage model, so that the problem that the identification precision of rotor resistance is reduced by the change of the stator resistance is avoided. The method is applied to rotor flux linkage oriented vector control systems, so that the rotor flux linkage orientation is more accurate, efficient operation of a control system for the induction motor used for vehicles is guaranteed, and the dynamic property and reliability of the whole vehicle are improved.
Owner:SHANDONG UNIV OF TECH
Anti-integral saturation control method and system of cascade control system
ActiveCN102426431AImprove adjustment qualityProgramme control in sequence/logic controllersControl systemCascade control system
The invention provides an anti-integral saturation control method of a cascade control system. The method comprises the following steps of: judging an anti-integral saturation direction according to input quantity and outputting logic judging quantity; delaying the output of the logic judging quantity; sending one part of the logic judging quantity output in a delayed way into a tracking condition pin of the cascade control system; selecting preset tracking quantity according to the other part of the logic judging quantity output in a delayed way; obtaining leading quantity; and sending the leading quantity and the selected tracking quantity into a tracking quantity pin of the cascade control system. The invention also provides an anti-integral saturation control system of the cascade control system; and by using the system, the integral saturation phenomenon in the industrial control process can be reduced and the adjusting quality of the industrial process control can be improved.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Motor control anti-windup and voltage saturation design for electric power steering
ActiveCN106208866AElectronic commutation motor controlElectric motor controlElectric power steeringPower flow
Owner:STEERING SOLUTIONS IP HLDG
Method for observing rotor magnetic chain based on cross feedback double compensation method
InactiveCN102570960AIt is difficult to determine the amount of compensationOvercompensatedElectronic commutation motor controlVector control systemsLow speedThree-phase
The invention discloses a method for observing a rotor magnetic chain based on a cross feedback double compensation method. The method comprises the following steps of: performing 3s / 2s conversion on the three-phase voltage and current of a motor obtained by measuring to obtain voltage and current components on a two-phase static coordinate system; compensating the voltage components respectively, and entering a low-pass filtering procedure; multiplying the current components with respective operation coefficients thereof, subtracting a voltage low-pass filtering output value from a product, and multiplying with an operation coefficient in a rotor magnetic chain observing voltage model to obtain an axis basic magnetic chain component; performing point multiplication computation on the magnetic chain component and the voltage component of an axis respectively to obtain an orthogonal coefficient serving as a coefficient used for magnetic chain compensation computation; separating an amplitude from a phase during computation of magnetic chain compensation and only compensating for the amplitude to avoid causing an error on a magnetic chain direction angle; and adding magnetic chain compensation with a basic magnetic chain component to obtain a final output magnetic chain. Due to the adoption of the method, errors of the rotor magnetic chain observing voltage model at a low speed are reduced, response speeds to voltage and current frequency changes are increased, and integral saturation is well suppressed.
Owner:HENAN UNIV OF SCI & TECH
Novel high-precision MEMS accelerometer
ActiveCN105759077ASolve the problems of poor parameter accuracy and difficulty in accurate controlSolve problems such as poor accuracy and difficulty in accurate controlAcceleration measurementLoop filterDigital feedback
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Direct torque control method for permanent magnet synchronous motor based on torque ring active disturbance rejection control technology
ActiveCN107834933AImprove robustnessImprove dynamic and static response performanceElectronic commutation motor controlVector control systemsVoltage vectorControl signal
The invention provides a direct torque control method for a permanent magnet synchronous motor based on the torque ring active disturbance rejection control technology, and the method comprises the following steps: calculating a given torque Te* and a feedback torque Te; taking the difference between the given torque T<e><*> and the feedback torque T<e> as the input, taking an angle variation delta(theta<s>) of a stator flux linkage as the output, and setting an active disturbance rejection controller; calculating an output voltage vector through the angle variation of the stator flux linkage,and outputting a PWM control signal through a space vector modulation module. The method is advantageous in that the method avoids the impact from integral saturation, achieves the observation of theuncertainty and unmodeled dynamics of parameters through ESO, and achieves the compensation for the total disturbance quantity of the observation in NLSEF, so as to improve the robustness of a motorcontrol system, and improve the dynamic and static response performances.
Owner:广东爱吉尔机器人科技有限公司
Linear active disturbance rejection control-based permanent-magnet synchronous motor speed regulation system
InactiveCN107612432APerformance impactImprove anti-interference abilitySingle motor speed/torque controlMotor speedPermanent magnet synchronous motor
The invention discloses a linear active disturbance rejection control-based permanent-magnet synchronous motor speed regulation system. The linear active disturbance rejection control-based permanent-magnet synchronous motor speed regulation system comprises a first-order TD module, a rotational speed signal processing module, a first-order LSEF module, a disturbance compensation processing module, a direct torque control (DTC) module, a permanent magnet synchronous motor (PMSM) speed modulation module, a first control input gain module, a second control input gain module and a first-order ESOmodule. A feedback inhibition anti-integral saturation method is applied to an active disturbance rejection controller, so that the system has anti-integral saturation performance; compared with a traditional active disturbance rejection controller, the system has anti-integral saturation capability, integral saturation of the controller is prevented from affecting performance of the controller,the rate of withdrawing integral saturation is controllable, and the active disturbance rejection control strategy can be further optimized; and meanwhile, based on linear active disturbance rejectioncontrol, the system structure can be simplified, the anti-interference performance and the robustness of the motor speed regulation system can be improved by linear active disturbance rejection control, and favorable combination of rapid response and no overshoot is achieved.
Owner:ANHUI WOLF POWER TECH
Fault-tolerant control method for two-level PWM rectifier based on integral anti-saturation
ActiveCN109861562AImprove single-pipe failureAc-dc conversion without reversalVoltage vectorSimulation
The invention discloses a fault-tolerant control method for a two-level PWM rectifier based on integral anti-saturation. The method comprises the steps: switching a PI controller to an anti-saturationPI controller; selecting a sector dividing mode for sector dividing; determining the influence of a fault switching tube on each sector and the change of a basic voltage vector before and after a fault; determining the basic voltage vector of each sector and the action time of the basic voltage vector before the fault; adjusting the action time of the basic voltage vector of the sector influencedby the fault switching tube; determining the on time of a three-phase switching tube; modulating the on time of the switching tube and a triangular carrier wave, determining a PWM pulse of the switching tube, determining the on-off of the switching tube, and completing the anti-integration saturation fault-tolerant control. The method can reduce the pulsation of the current track circle, increasethe control precision of the controller and improve the software fault-tolerant control effect when accurately compensating the sector influenced by the fault switching tube.
Owner:NANJING UNIV OF SCI & TECH
Breathing machine voltage regulating system and control method
The invention discloses a breathing machine voltage regulating system and a control method. The method comprises the following steps that an arithmetic system receives input voltage, a pressure sensor collects output pressure of a turbofan and feeds data back to the arithmetic system, the arithmetic system performs arithmetic treatment and then outputs motor control voltage to a control system, and the control system controls the rotation speed of the turbofan according to the motor control voltage to control the output pressure of the turbofan. According to the breathing machine voltage regulating system and the control method, the air pressure output by the turbofan is adopted as closed-loop control of feedback, similar integral windup controlled by PID cannot be generated, a motor is rapid in response, the response time of a breathing machine is significantly shortened, and the comfortableness of the breathing machine is significantly improved.
Owner:HUNAN MICOME ZHONGJIN MEDICAL SCI & TECH DEV CO LTD
Observation method of permanent magnet synchronous motor stator flux linkage based on extended flux linkage observer
ActiveCN103346726BAvoid problemsReduce orderElectronic commutation motor controlVector control systemsIntegratorMathematical model
Owner:黄山市开发投资集团有限公司
Anti-integral saturation method for cascade control system
InactiveCN113110026AIntegral Windup AvoidanceEasy to adjustControllers with particular characteristicsControl systemRegulator
The invention discloses an anti-integral saturation method for a cascade control system. The method comprises the steps: an auxiliary regulator PID2 is in a tracking state when the output of the auxiliary regulator PID2 reaches a limit value, and the output of the auxiliary regulator PID2 is locked; when the input deviation of the auxiliary regulator PID2 is reversed, the locking of the output of the auxiliary regulator PID2 is canceled; the locking condition of a main regulator PID1 is modified. When the output of the auxiliary regulator PID2 reaches a limit value, an RS trigger is set, and the output of the main regulator PID1 is locked in a one-way manner, so that the output of the main regulator PID1 is always locked when the output of the auxiliary regulator PID2 shakes and changes; and when the input deviation of the auxiliary regulator PID2 is reverse, the RS trigger is reset, and the blocking signal of the main regulator PID1 is cancelled. Aiming at the integral saturation problem of the cascade control system, the integral saturation of the main regulator PID1 of the cascade control system can be effectively avoided by considering the aspects of changing the tracking mode of the auxiliary regulator PID2, modifying the locking condition of the main regulator PID1 and the like, and the rapid regulation of the main regulator PID2 can be ensured.
Owner:XIAN THERMAL POWER RES INST CO LTD
A new anti-integral windup pid control method
ActiveCN105301957BSimple methodSuppress saturationControllers with particular characteristicsControl saturationControl theory
Owner:QUANZHOU INST OF EQUIP MFG
Design method of pac controller based on intelligent control algorithm
InactiveCN105759607BImprove interconnectivityHigh Acquisition AccuracyAdaptive controlForward algorithmNetwork communication
Owner:BEIJING UNIV OF TECH
pid control method with integral saturation preprocessing function
InactiveCN103838139BEliminate phenomenonImprove control effectControllers with particular characteristicsStep responseSteady state
The invention provides a PID control method with the integral saturation and pretreatment functions. The PID control method analyzes the transient process of step response of a system and is provided according to an error between the set valve and the feedback quantity and a change rate of the controlled quantity; score accumulation values are treated differently according to the different conditions so that the integral saturation phenomenon can be thoroughly eliminated, and the good control effects of the steady-state characteristic and the dynamic characteristic of the system can be achieved; moreover, the good capacity of resisting disturbance is achieved.
Owner:BEIJING UNION UNIVERSITY
Anti-saturation variable-speed integration method and system based on PID control
ActiveCN112230541ADoes not affect robustnessDoes not affect reliabilityControllers with particular characteristicsControl systemControl engineering
The invention discloses an anti-saturation variable-speed integration method based on PID control. The method comprises the following steps: S1, carrying out calculation to obtain an original controlquantity through conventional PID control and control with deviation value feedback; S2, limiting the control quantity and the change rate range of the control quantity, and calculating to obtain an effective control quantity; and S3, judging an integral saturation direction according to the control quantity or the change rate over-limit direction and the integral direction, and giving a corresponding deviation value for weakening the integral. According to the invention, extra control parameters are not added, the structure is simple, the robustness and reliability of the control system are not influenced, and the application range is wide; the method is often applied to systems, such as a vehicle power assembly controller, which are quick in control input change and limited in output andeasily generate integral saturation. The control quantity can be quickly separated from a saturation region, and the large-amplitude overshoot of the system is avoided.
Owner:DONGFENG MOTOR CORP HUBEI
An anti-integral windup control method for motor control
ActiveCN106842960BKeep functionImprove adaptabilityAdaptive controlElectric machineControl engineering
The invention discloses an anti-integral saturation control method for motor control. The anti-integral saturation control method is characterized in that on the basis of traditional PI (proportional integral) controller, an amplitude limiting module and a reverse calculation tracking anti-integral saturation control algorithm are adopted, and the compensation coefficient is adjusted in real time according to the system running state, so as to solve the problem of overshoot or advanced desaturation due to unreasonable setting of the fixed compensation coefficient in the traditional algorithm; by adopting the algorithm, the desaturation function of the traditional algorithm is maintained, and the suitability of traditional algorithm and the integral control property of the system are improved.
Owner:NANJING ESTUN AUTOMATION CO LTD
Control device and control method
PendingCN111752142APrevent the output from manipulating theReduce the impactControllers with particular characteristicsAdaptive controlLower limitControl engineering
The invention provides a control device and a control method, which can prevent continuous output of excessive output end operation amount during application of FF operation amount without modeling ofphysical phenomenon. The control device includes: a PID control calculation unit that calculates an operation amount by PID control calculation; an operation amount limiter that limits the operationamount to a value equal to or greater than an operation amount lower limit value and equal to or less than an operation amount upper limit value; an FF operation amount generation unit that outputs arectangular waveform operation amount so as to eliminate disturbances on the basis of the input of a notification signal that starts before the disturbance application time point and ends after the application of the disturbances; an operation amount addition unit that outputs an output end operation amount, which is a result of adding the operation amount output by the operation amount limiter tothe operation amount; an upper and lower limit value changing unit that changes the upper and lower limit values of the anti-integral saturation function of the PID control calculation unit on the basis of the operation amount; and an upper and lower limit value changing unit that changes the upper and lower limit values of the operation amount limiter in accordance with the operation amount.
Owner:YAMATAKE HONEYWELL CO LTD
Common rail pressure control method
ActiveCN104213997BAchieve high-precision rail pressure control effectElectrical controlMachines/enginesRail pressureProportion integration differentiation
The invention provides a common rail pressure control method, and particularly provides a novel common rail pressure control method of a fuel system, which aims at overcoming the defects of the existing common rail pressure control technique of the electrically-controlled diesel fuel system. The common rail pressure control method has the advantages that a fuzzy adaptive PID (proportion integration differentiation) control method is used to replace the common PID control method, so as to meet the requirement of control dynamic property of rail pressure under the complicated working condition; the change of the gain of PID can be uniformly arranged and jointly assessed according to the judgment of engine working conditions and common rail pressure change phase, so as to realize the high-precision rail pressure control effect; meanwhile, a common rail pressure PID integral separation method is used for fundamentally solving the integral windup, and eliminating the deterioration of common rail pressure control dynamic property caused by the integral windup.
Owner:CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST +1
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