Direct synthesis-based controller design for integrating processes with time delay

Rao, A. Seshagiri; Rao, V. S. R.; Chidambaram, M.

doi:10.1016/j.jfranklin.2008.06.004

Cited by 117 publications

(32 citation statements)

References 23 publications

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“…The performance comparison of the proposed controller with the PID controllers designed by recently reported methods (Seshagiri Rao and Chidambaram [30], Seshagiri Rao et al [24], Chidambaram and Padma Sree [29], Anil and Padma Sree [28] …”

Section: Simulation Resultsmentioning

confidence: 99%

“…(17a) and Eq. (17b) (Seshagiri Rao et al [24]). The stability regions are tabulated with the IMC-PID controller considering 10% of designed filter time constants in Table 3 along with the stability regions obtained by the IMC-PID controller with the designed filter time constants.…”

Section: Case Studymentioning

confidence: 99%

“…The PID parameters are k c 00.219, t I 015.8, t D 02.1044 with a lag filter having a filter time constant, g 2 00.6468. The PID parameters by equating coefficient method (Chidambaram and Padma Sree [29]) are k c 00.1791, t I 012.5, t D 02.45 and direct synthesis method (Seshagiri Rao et al [24]) are k c 00.2, t I 017.5, t D 02.143 and time constant of the PID filter b00.0714. The response of the system with IMC-PID controller for unit step change in the set point at 0 s and unit step change in load at 70 s is shown in Fig.…”

Section: Case Studymentioning

confidence: 99%

“…PID controller designed by IMC method gives poor disturbance rejection. Recently Seshagiri Rao et al [24] have designed PID controller for integrating systems with time delay by direct synthesis method. In the direct synthesis method, the closed loop transfer function is to be assumed, from which controller transfer function is derived.…”

Section: Introductionmentioning

confidence: 99%

“…It is easy to tune a single feedback control loop rather than having a complicated IMC control structure with number of controllers which are to be tuned simultaneously. The performance of the proposed IMC PID controller for various transfer function models is compared with the recently reported methods like direct synthesis method (Seshagiri Rao et al [24]; Anil and Padma Sree [28]), equating coefficient method (Chidambaram and Padma Sree [29]), and two degree freedom controller (Seshagiri Rao and Chidambaram [30]) for both servo and regulatory problems.…”

Section: Introductionmentioning

confidence: 99%

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IMC Based Controller Design for Integrating Systems with Time Delay

Rao

Sree

2010

Indian Chemical Engineer

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Design of proportional integral and derivative (PID) controllers based on internal model control (IMC) principles for integrating systems with time delay is proposed in the present work. The transfer function models considered in the present work include pure integrator with dead time, double integrating system with time delay, stable and unstable first order plus time delay (FOPTD) system with integrator. The performance of the proposed IMC PID controller is compared with the recently reported methods. The robustness of the proposed controller for uncertainty in model parameters is evaluated considering one parameter at a time. The stability region for all model parameters is evaluated using Kharitonov's theorem for various transfer function models and compared with recently reported methods.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Case Studymentioning

confidence: 99%

Section: Case Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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IMC Based Controller Design for Integrating Systems with Time Delay

Rao

Sree

2010

Indian Chemical Engineer

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Novel proportional–integral–derivative controller with second order filter for integrating processes

Kumar

Manimozhi

2018

Asia-Pacific J Chem Eng

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Many chemical and nonchemical processes exhibit integrating behavior. This paper presents new approach for deriving parameters of proportional-integral-derivative controller for various types of integrating processes. In order to obtain enhanced performance, the controller is augmented by a second order filter. In the process of deriving controller and filter parameters, time delay is approximated by second order Laguerre shift. Analytical tuning rules are derived on the basis of the sensitivity of loop transfer function. With the help of polynomial method, the poles are placed so as to minimize the overshoot in the servo response. A set point filter is also employed to mitigate the overshoot and settling time in servo response. Besides, the set point filter is able to decouple servo and regulatory responses. The proposed method is compared with recently proposed methods. The evaluation is carried out in terms of various performance indices. Investigation of evaluation results reveals that the proposed method offers considerable improvement over the existing methods.

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Designing of internal model control proportional, integral, and derivative controller with second‐order filtering for lag‐ and delay‐dominating processes based on suitable dead time approximation

Nath

Dey

Mudi

2019

Asia-Pacific J Chem Eng

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In practice, majority of the industrial chemical processes contain considerable dead time and significant process lag. Depending on the value of dead time to time constant ratio, industrial processes can be classified as lag dominating and delay dominating in nature. Here, an attempt has been made to find out an improved dead time estimation technique from the available methodologies like Taylor series and Pade's approximation relations so that a more accurate process model can be obtained and, consequently, an enhanced model‐based internal model control based proportional, integral, and derivative (IMC‐PID) controller may be designed. In addition, to ensure an improved closed loop performance, a second‐order filter is incorporated in IMC‐PID structure where damping term of the filter is calculated from dead time to time constant ratio of the concerned process. Efficacy of the proposed scheme is verified through simulation study on first‐order plus dead time, second‐order plus dead time, higher order, and nonminimum phase processes in comparison with recently reported model‐based PID settings. In addition to simulation study, a real‐time experimental verification is also made on a level control loop under transient and steady state operating phases.

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Direct synthesis-based controller design for integrating processes with time delay

Cited by 117 publications

References 23 publications

IMC Based Controller Design for Integrating Systems with Time Delay

IMC Based Controller Design for Integrating Systems with Time Delay

Novel proportional–integral–derivative controller with second order filter for integrating processes

Designing of internal model control proportional, integral, and derivative controller with second‐order filtering for lag‐ and delay‐dominating processes based on suitable dead time approximation

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