A Tutorial on Modern Anti-windup Design

Galeani, Sergio; Tarbouriech, Sophie; Turner, Matthew C.; Zaccarian, Luca

doi:10.3166/ejc.15.418-440

Cited by 235 publications

(112 citation statements)

References 67 publications

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“…Normally, the AW compensator is activated upon the occurrence of saturation. The subject of AW is now fairly mature and the reader is referred to the surveys [29,6], the edited volume [28] and the monographs [7,11,36]. In addition, two earlier papers [16,3] describe and connect some of the early work on AW.…”

Section: Introductionmentioning

confidence: 99%

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A non-square sector condition and its application in deferred-action anti-windup compensator design

Turner

Herrmann

2014

Automatica

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A sector condition for two connected deadzone nonlinearities is provided. By introducing an additional non-square operator which exploits their connectivity, a more general set of sector-like matrix inequalities is obtained. This "non-square" matrix inequality condition is applied to an anti-windup (AW) problem in which the AW compensator is not activated until the unconstrained control signal reaches a welldefined level beyond that of the physical actuator limits. The non-square sector condition allows such "deferred-action" AW synthesis to be performed in a manner much closer to traditional ("immediate") sector-based AW with either lowered conservatism or decreased computational effort in contrast to recent work. The non-square condition is applicable to other AW problems.

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Section: Introductionmentioning

confidence: 99%

“…Then only Λ [1] is ever active and activation occurs when "physical" saturation occurs i.e. we have the standard ("immediate" [32]) AW case [9,29,6] considered in most of the literature. (2) Deferred action/Delayed AW.…”

Section: A Two-stage Anti-windup Architecturementioning

confidence: 99%

A non-square sector condition and its application in deferred-action anti-windup compensator design

Turner

Herrmann

2014

Automatica

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“…This problem might also appear in the proposed FTC technique when torque saturation and/or pitch actuator saturation occur. Note that, although it is out of the scope of this paper, the problem can be overpassed using, for instance, the well-known anti-windup technique (see [37]). Figure 8.…”

Section: Resultsmentioning

confidence: 99%

Fault Diagnosis and Fault-Tolerant Control of Wind Turbines via a Discrete Time Controller with a Disturbance Compensator

et al. 2015

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This paper develops a fault diagnosis (FD) and fault-tolerant control (FTC) of pitch actuators in wind turbines. This is accomplished by combining a disturbance compensator with a controller, both of which are formulated in the discrete time domain. The disturbance compensator has a dual purpose: to estimate the actuator fault (which is used by the FD algorithm) and to design the discrete time controller to obtain an FTC. That is, the pitch actuator faults are estimated, and then, the pitch control laws are appropriately modified to achieve an FTC with a comparable behavior to the fault-free case. The performance of the FD and FTC schemes is tested in simulations with the aero-elastic code FAST.

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“…In fact, one can see that the architecture of the anti-windup scheme is, in essence, the same as the "positive µ modification" proposed recently [19] and generalising earlier work [15]. However, using ideas from anti-windup compensation (in particular those introduced in [26] -see also [32,5]) it can be proved that the scheme, under certain circumstances, allows statements about the recovery of un-saturated behaviour to be made. Note in [19] it was proved that the error between the ideal model state and the plant state was bounded provided the reference and initial state satisfied certain bounds.…”

Section: Introductionmentioning

confidence: 97%

Positiveμmodification as an anti-windup mechanism

Turner

2017

Systems & Control Letters

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This paper proposes a simple anti-windup mechanism for a model reference adaptive control scheme subject to saturation constraints. The anti-windup compensator has, in essence, the same structure as positive µ modification for the same class of systems. It is shown how this structure can, under certain circumstances, display characteristics similar to anti-windup schemes proposed for linear control systems. In particular, it is shown that if the (unknown) ideal control signal eventually lies within the control constraints, then the response of the adaptive control system will converge to that of the reference system -provided certain conditions are satisfied. The paper illustrates the challenge of designing anti-windup compensators for model-reference adaptive control systems.

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A Tutorial on Modern Anti-windup Design

Cited by 235 publications

References 67 publications

A non-square sector condition and its application in deferred-action anti-windup compensator design

A non-square sector condition and its application in deferred-action anti-windup compensator design

Fault Diagnosis and Fault-Tolerant Control of Wind Turbines via a Discrete Time Controller with a Disturbance Compensator

Positiveμmodification as an anti-windup mechanism

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