Modeling and Control of FOPDT Modeled Processes—A Review

Belwal, Neha; Juneja, Pradeep; Sunori, Sandeep Kumar; Jethi, Govind Singh; Maurya, Sudhanshu

doi:10.1007/978-981-19-2538-2_25

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…Therefore, a linear model can adequately represent the real behavior of processes. In practice, most chemical processes can be mathematically represented by an SOPDT model. − Consider that a chemical process can be approximated by the SOPDT model, as presented in (eq ).…”

Section: Design Of the Hybrid Controllermentioning

confidence: 99%

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Hybrid Controller Based on Numerical Methods for Chemical Processes with a Long Time Delay

et al. 2023

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A hybrid control framework is proposed as an alternative for long time delays in chemical processes. The hybrid approach mixes the numerical methods in an internal mode control (IMC) structure, which uses the particle swarm optimization (PSO) algorithm to improve the adjustment of the controller parameters. Simulation tests are carried out on linear systems of high order and inverse response, both with dominant delay, and tests on a nonlinear process (chemical reactor). The performance of the proposed controller is stable and satisfactory despite nonlinearities in various operating conditions, set-point changes, process disturbances, and modeling errors. In addition, experimental tests were performed on a setup composed of two heaters and two temperature sensors mounted on an Arduino microcontroller-based board called the Temperature Control Laboratory (TCLab), with an additional software delay introduced. The merits and drawbacks of each scheme are analyzed using radar charts, comparing the control methods with different performance measures for set-point and disturbance changes. Furthermore, the new controller uses PSO to improve the tuning parameters.

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Section: Design Of the Hybrid Controllermentioning

confidence: 99%

“…In practice, most chemical processes can be mathematically represented by an SOPDT model. 36 − 38 Consider that a chemical process can be approximated by the SOPDT model, as presented in ( eq 1 ).…”

Section: Design Of the Hybrid Controllermentioning

confidence: 99%

Hybrid Controller Based on Numerical Methods for Chemical Processes with a Long Time Delay

et al. 2023

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“…Utilizing system identification techniques, it is possible to identify the system as a model of the process when the inputs and outputs are known and it is clear that the system closely resembles the process (Kaplan & Bodur, 2022). By using tried-and-true controller tuning methods, its related FOPDT model makes this work simpler (Khuriati, 2022), one of the characteristics of the problems in industrial control processes can be modeled mathematically, one of which is self-regulating process modeling, where the process is stable, and in modeling it can be approximated using FOPDT (first order plus dead time) mathematical model (Belwal, et al, 2023), which is a function of first order with the addition of a dead time, characterized by a parameter (L) transportation delay, processing time constant (T), and process static gain (K). Testing integration without control and observing changes in the manipulated variable (MV) to the process variable (PV) will get the characteristics of a plan can be seen in Figure 4.…”

Section: First Order Plus Dead Time (Fopdt)mentioning

confidence: 99%

Room Temperature Control using Voltage Controller for Miniature Powder Milk Storage

SUTEDJO¹,

EVININGSIH²,

MAHENDRA³

et al. 2023

ELKOMIKA

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Suhu ruang penyimpanan Susu Bubuk akan mempengaruhi kualitasnya, dengan kemungkinan bakteri dan virus yang dapat mengkontaminasi produk, suhu yang direkomendasikan pada ruangan penyimpanan berdasarkan penelitian sebelumnya yaitu 20-25 o C, dengan tujuan untuk menghambat pertumbuhan bakteri asam laktat. Berdasarkan permasalahan tersebut, dirancang ruang penyimpanan Susu Bubuk dengan kapasitas volume 220 liter dengan tidak menggunakan ventilasi melainkan ruang kedap udara, dengan menggunakan empat buah Peltier melalui pengaturan tegangan yang akan mempengaruhi temperatur. Pada saat menggunakan Peltier diperlukan tegangan yang sesuai dan konstan dari keluaran Buck Converter untuk mencapai suhu yang ditargetkan, sehingga digunakan kontrol Proportional Integral untuk mempercepat sistem ke tegangan yang diharapkan untuk suhu target 23 o C. Pada hasil penerapan kontrol dengan Kp= 5 dan Ki= 22.32 pada tegangan 12 Volt didapatkan temperatur 23.2 o C lebih mendekati suhu target dibandingkan dengan tegangan 11 volt dan 10 volt dengan suhu yang dihasilkan 23.5 o C dan 23.8 o C.

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“…Significant research effort has been devoted to the control of FOPTD processes (see (Belwal et al (2023)) for a detailed survey on the topic). In (Sharma (2013)), the authors compare the performance of different Internal Model Control (IMC)-based tuning rules applied to regulate an FOPTD process.…”

Section: Introductionmentioning

confidence: 99%

Optimal Controller Tuning Technique for a First-Order Process with Time Delay

Enwerem¹,

Okoro²

2022

Preprint

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We present a controller tuning strategy for first-order plus time delay (FOPTD) processes where the time delay in the model is approximated using the Padé function. Using Routh-Hurwitz stability analysis, we derive the gain that will give rise to desirable PID controller settings. The resulting PID controller, now correctly tuned, produces satisfactory closed-loop behavior and stabilizes the first-order plant. Our proposed technique eliminates the deadtime component in the model and results in a minimum-phase system with all of its poles and zeros in the left-half s-plane. To demonstrate the effectiveness of our approach, we present control simulation results from an in-depth performance comparison between our technique and other established model-based strategies used for the control of time-delayed systems. These results prove that, for the FOPTD model, Padé approximation eliminates the undesirable effects of the time delay and promises a faster tracking performance superior to conventional controllers.

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Modeling and Control of FOPDT Modeled Processes—A Review

Cited by 4 publications

References 15 publications

Hybrid Controller Based on Numerical Methods for Chemical Processes with a Long Time Delay

Hybrid Controller Based on Numerical Methods for Chemical Processes with a Long Time Delay

Room Temperature Control using Voltage Controller for Miniature Powder Milk Storage

Optimal Controller Tuning Technique for a First-Order Process with Time Delay

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