Control of non-minimum phase systems with dead time: a fractional system viewpoint

Nagarsheth, Shaival H.; Sharma, Shambhu N.

doi:10.1080/00207721.2020.1780514

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…For regulating the level of the drum, the effect of boiler feed water is used. It can be modelled as (Nagarsheth and Sharma, 2020)…”

Section: Case Studiesmentioning

confidence: 99%

“…The fractional characteristic polynomial’s graphical illustration is performed via MATLAB’s FOMCON toolbox. The generalized closed-loop setup for a fractional-characteristic polynomial is given as (Nagarsheth and Sharma, 2020)…”

Section: Case Studiesmentioning

confidence: 99%

“…Remark 2. Nagarsheth and Sharma (2020) and Uma et al (2010) proposed a controller setting for the same set of parameters. In their work, a set-point filter has been used for overshoot compensation.…”

Section: Case Studiesmentioning

confidence: 99%

“…Raja and Ali (2021) recommended a new tuning approach with a series cascade structure after accountability Smith predictor for integrating the system. Nagarsheth and Sharma (2020) unified the inverse and dead-time compensators to deal with the NMP systems; however, they did not modify the bode’s ideal transfer and retained the original version. In the above publications, tuning via conventional Bode’s ideal transfer approach for the combination of fractional-filter-based controllers with the Smith predictor exists.…”

Section: Introductionmentioning

confidence: 99%

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Optimal fractional-order series cascade controller design: A refined Bode’s ideal transfer function perspective

Yadav,

Patel,

Nagarsheth

2024

Transactions of the Institute of Measurement and Control

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In process industries, cascade control is comprehensively used for disturbance attenuation. This manuscript presents the control of the non-minimum phase (NMP) system with dead time via a series cascade scheme. An improved fractional-filter-based control scheme encompassing inverse and dead time compensators with analytical tuning is proposed. The design hinges on an enhanced Bode’s ideal transfer function, which incorporates delay and NMP zero to deal with the system’s NMP and dead time. Particle swarm optimization (PSO) is utilized to obtain the optimal assessment of fractional filter-based controller settings by minimizing an objective function. Two benchmark problems are presented to test the efficacy of the recommended controller. The Riemann surface and sensitivity examination are used to realize the stability and robustness of the feedback design. Numerical simulations exhibit the superiority of the suggested controller for closed-loop results.

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“…For regulating the level of the drum, the effect of boiler feed water is used. It can be modelled as (Nagarsheth and Sharma, 2020)…”

Section: Case Studiesmentioning

confidence: 99%

Section: Case Studiesmentioning

confidence: 99%

Section: Case Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal fractional-order series cascade controller design: A refined Bode’s ideal transfer function perspective

Yadav,

Patel,

Nagarsheth

2024

Transactions of the Institute of Measurement and Control

Self Cite

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“…More recently, several PID tuning or controller design methods for processes whose dynamics include inverse-response, time-delay, and integrating characteristics have been developed [21][22][23][24][25][26]. Other authors gone beyond the PID controller and proposed the use of fractional control for non-minimum phase plus dead time systems [27], and Sliding Mode Controllers applied to high-order long dead-time inverse-response processes [28].…”

Section: Introductionmentioning

confidence: 99%

PID Tuning Method Based on IMC for Inverse-Response Second-Order Plus Dead Time Processes

et al. 2020

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This work addresses a set of tuning rules for PID controllers based on Internal Model Control (IMC) for inverse-response second-order systems with dead time. The transfer function, and some time-response characteristics for such systems are first described. Then, the IMC-based methodology is developed by using an optimization objective function that mixes performance and robustness. A correlation that minimizes the objective function and that allows the user to compute the controller’s tuning parameter is found. The obtained expressions are mathematically simple, which facilitate their application in a ten-step systematic methodology. Finally, the proposed tuning method is compared to other well-known tuning rules that have been reported in literature, for a wide range of parameters of the process. The performance achieved with the proposed method is very good not only for disturbance rejection but for set-point tracking, when considering a wide-range of parameters of the process’ transfer function.

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Analytical Design of IMC-Based PID Controller for Non-minimum Phase Process with Time Delay

Kumar

Ranganayakulu

Babu

2022

Lecture Notes in Electrical Engineering

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Control of non-minimum phase systems with dead time: a fractional system viewpoint

Cited by 13 publications

References 35 publications

Optimal fractional-order series cascade controller design: A refined Bode’s ideal transfer function perspective

Optimal fractional-order series cascade controller design: A refined Bode’s ideal transfer function perspective

PID Tuning Method Based on IMC for Inverse-Response Second-Order Plus Dead Time Processes

Analytical Design of IMC-Based PID Controller for Non-minimum Phase Process with Time Delay

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