Robust PI/PID controllers for load disturbance based on direct synthesis

Vilanova, Ramón; Arrieta, O.; Ponsa, Pere

doi:10.1016/j.isatra.2018.07.040

Cited by 28 publications

(17 citation statements)

References 20 publications

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“…R8: The direct synthesis rule proposed by Vilanova et al 50 with M S = 2.0, that is, the most aggressive tuning for sharp disturbance rejection; in the absence of indications about the derivative filter, we set N = 20.…”

Section: Comparative Evaluationmentioning

confidence: 99%

Explicit Model-Based Real PID Tuning for Efficient Load Disturbance Rejection

Leva

Papadopoulos

Seva

et al. 2019

Ind. Eng. Chem. Res.

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In the process control, many PID loops are primarily devoted to rejecting load disturbances, and some of them are crucial for the quality of the overall plant operation. In such a scenario, automatic tuning is highly desired. However, load disturbance rejection calls for strong feedback up to quite high frequencies with respect to the dominant plant dynamics, on which most tuning rules are centered. As such it is difficult for a rule to yield good and, above all, uniform results in the face of all the various process structures it can be confronted with. In this paper, we propose an explicit model-based PID tuning rule specifically targeted at the problem just evidenced. The rule minimizes the magnitude of the nominal disturbance-to-output frequency response, at the same time preventing that magnitude to exhibit a peak or a plateau around its maximum. This characteristic, together with tuning the PID derivative filter, leads to sharp disturbance rejection without incurring in an excessive control sensitivity to high-frequency measurement noise and mitigates the problems caused by heterogeneous process dynamics. The proposed approach is assessed by comparing the rule with selected counterparts, on a literature benchmark with different process structures. A laboratory experiment is finally presented to show that our rule can withstand real-world operating conditions.

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Section: Comparative Evaluationmentioning

confidence: 99%

Explicit Model-Based Real PID Tuning for Efficient Load Disturbance Rejection

Leva

Papadopoulos

Seva

et al. 2019

Ind. Eng. Chem. Res.

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“…Reglas de sintonía de PID alternativas, destinadas a mejorar el rendimiento en la operación en regulación pueden consultarse en (Horn et al, 1996), (Shamsuzzoha and Lee, 2007). Aunque no estrictamente basado en IMC, pero en síntesis directa, en Vilanova et al (2018) se puede encontrar un enfoque que cubre las diferentes dinámicas usuales a la vez que incluye la asignación de un cierto nivel de robustez.…”

Section: Introductionunclassified

Sintonía de controladores PID: un enfoque analítico basado en el moldeo de la función de sensibilidad

Vilanova

Alcántara

Pedret

2021

Rev. iberoam. autom. inform. ind.

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<p>El controlador PID es la opción más común en el ámbito de las aplicaciones de control, siendo la opción predominante en el control de procesos industriales. Entre los métodos analíticos más usuales utilizados para su diseño, el Control por Modelo Interno (IMC) ha ganado una notable aceptación industrial debido a su naturaleza robusta y buenas respuestas ante cambios de consigna. Sin embargo, la aplicación tradicional del IMC da como resultado un bajo rendimiento para el rechazo de perturbaciones en carga para plantas integradoras y/o con largas constantes de tiempo. Este trabajo presenta un método de diseño, basado en IMC, que evita esta deficiencia y está diseñado para funcionar bien en plantas de complejidad moderada para las cuales, por otro lado, el ajuste analítico de un controlador PID es plausible. Por simplicidad, el diseño solo se centra en la función de sensibilidad en lazo cerrado. El enfoque proporciona un ajuste basado en modelo en términos de los compromisos robustez/rendimiento y de servo/regulación. Aunque comúnmente se considera el compromiso robustez/rendimiento, no es tan común tener en cuenta también, por ejemplo, el conflicto entre las perturbaciones de entrada y salida, también conocido como el compromiso servo/regulación. Con el objetivo de proporcionar un enfoque de ajuste unificado, se muestra como la metodología propuesta permite tratar diferentes dinámicas de proceso de manera unificada.</p>

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“…In the literature survey, it has also been found that the controller design methods generally focus on the desired set-point tracking or load-disturbance rejection. Various methods have used desired set-point response to design PID controller design such as Lee et al (2000), Panda (2009) and Cho et al (2014) among many more, while the desired loaddisturbance response have been used in Shamsuzzoha and Lee (2007), Chen and Seborg (2002), Vilanova et al (2018), etc. However, a simple design procedure focusing on both setpoint and load-disturbance response in addition to being applicable to a wide-range of highorder processes is a rare finding.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity model based PID controller for various high-order processes

Ghosh

Pan

2019

COMPEL

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Purpose This paper aims to propose a reference model based simple strategy for the design of proportional-integral-derivative (PID) controller using frequency response matching for high-order stable, integrating and unstable processes that may have time-delay and non-minimum phase zero. Design/methodology/approach The reference sensitivity model is designed fulfilling stability conditions of the control system responses such as set-point response, load-disturbance response and noise response along with transient response criteria. The analytical controller thus designed is approximated to a PID controller using a simple formula based on a model-matching technique at low frequency. Findings PID controllers are designed for examples with varied dynamics taken from the literature, and the performances of the designed control systems are compared with some methods prevalent in the literature to show the efficacy of the proposed work. Overall, the method gives satisfactory set-point, as well as load-disturbance responses and controller-outputs in all the cases considered. Originality/value The method is applicable to high-order processes of various monotonic or oscillating dynamics without requiring process reduction. The PID controller designed considering a reference model with suitable criteria ensuring stability and a modified model matching technique, which provides a stable control system for all these high-order processes.

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Robust PI/PID controllers for load disturbance based on direct synthesis

Cited by 28 publications

References 20 publications

Explicit Model-Based Real PID Tuning for Efficient Load Disturbance Rejection

Explicit Model-Based Real PID Tuning for Efficient Load Disturbance Rejection

Sintonía de controladores PID: un enfoque analítico basado en el moldeo de la función de sensibilidad

Sensitivity model based PID controller for various high-order processes

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