State feedback integral control with ‘ intelligent’ integrators

Krikelis, N. J.

doi:10.1080/00207178008922868

Cited by 110 publications

(35 citation statements)

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“…As is generally known, in step response a saturation of the actuator output is easy to occur and so the integrator windup in PI controller is also easy to occur. Accordingly we used an anti-windup PI controller [6] in the load pressure control loop and moreover, we used a limiter at the output end of the disturbance observer, since we noticed experimentally that the estimated values of the disturbance observer become very large regardless of actual disturbance when the actuator output saturates and this still more hastens the integrator windup. The output of the limiter z was defined by Where T is the output of the observer and Ps is the supply pressure.…”

Section: Resultsmentioning

confidence: 99%

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Motion Control of Water-Hydraulic Servo System

Matsui

Koseki

1996

Proceedings of the JFPS International Symposium on Fluid Power

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A water-hydraulic servo system in which an ann is driven by a single-rod cylinder is constructed.A water-hydraulic servovalve used in the system was obtained by modifying an oil-hydraulic one. Two types of motion control are implemented. One is a motion control based on a torque control using a disturbance torque observer. The other is a motion control only based on a position signal, in which an acceleration controller designed by H control theory is used. Performance of these control methods are investigated experimentally.From the results, these motion control show better responses and robustness than a conventional PI position control.

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Section: Resultsmentioning

confidence: 99%

“…(3),(4), Eq. (1) is rewritten as (5) Now, we introduce a nominal model given by (6) where Mn is the nominal moment of inertia and PL"is the command value of load pressure. Defining SU and (5,7) as deviations from Mn and pLn.…”

Section: Introductionmentioning

confidence: 99%

Motion Control of Water-Hydraulic Servo System

Matsui

Koseki

1996

Proceedings of the JFPS International Symposium on Fluid Power

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“…It is noted that the steady state integral action depends on the external load torque and the speed reference. Substituting (10) in to (9) yields the error dynamics as:…”

Section: Integral State Predictionmentioning

confidence: 99%

“…The transient performance such as the overshoot depends heavily upon the feedback gain of the control difference rather than the PI gains. For the limited integrator scheme [10], the Manuscript received Aug. 13, 2010; revised Nov. 4, 2010 † Corresponding Author: hbshin@gnu.ac.kr…”

Section: Introductionmentioning

confidence: 99%

Comparison and Evaluation of Anti-Windup PI Controllers

Park²,

Shin³

2011

Journal of Power Electronics

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This paper proposes a method for comparing and evaluating anti-windup proportional-integral (PI) control strategies. The so-called PI plane is used and its coordinate is composed of the error and the integral state. In addition, an anti-windup PI controller with integral state prediction is proposed. The anti-windup scheme can be easily analyzed and evaluated on the PI plane in detail. Representative anti-windup methods are experimentally applied to the speed control of a vector-controlled induction motor driven by a pulse width modulated (PWM) voltage-source inverter (VSI). The experimental results compare the anti-windup PI controllers. It is empathized that the initial value of the integral state at the beginning of the linear range dominates the control performance in terms of overshoot and settling time.

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“…Several PI-related anti-windup methods (e.g., conditioning technique [8]) have been developed. These methods utilize a state feedback integral control with the integrator in the forward path and a dead-zone non-linearity as a feedback.…”

Section: Introductionmentioning

confidence: 99%

Steady-State Integral Proportional Integral Controller for PI Motor Speed Controllers

Hoo

Haris²,

Chung³

et al. 2015

Journal of Power Electronics

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The output of the controller is said to exceed the input limits of the plant being controlled when a control system operates in a non-linear region. This process is called the windup phenomenon. The windup phenomenon is not preferable in the control system because it leads to performance degradation, such as overshoot and system instability. Many anti-windup strategies involve switching, where the integral component differently operates between the linear and the non-linear states. The range of state for the non-overshoot performance is better illustrated by the boundary integral error plane than the proportional-integral (PI) plane in windup inspection. This study proposes a PI controller with a separate closed-loop integral controller and reference value set with respect to the input command and external torque. The PI controller is compared with existing conventional proportional integral, conditional integration, tracking back calculation, and integral state prediction schemes by using ScicosLab simulations. The controller is also experimentally verified on a direct current motor under no-load and loading conditions. The proposed controller shows a promising potential with its ability to eliminate overshoot with short settling time using the decoupling mode in both conditions.

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State feedback integral control with ‘ intelligent’ integrators

Cited by 110 publications

References 0 publications

Motion Control of Water-Hydraulic Servo System

Motion Control of Water-Hydraulic Servo System

Comparison and Evaluation of Anti-Windup PI Controllers

Steady-State Integral Proportional Integral Controller for PI Motor Speed Controllers

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