Interval PID Tuning Rules for a Fractional-Order Model Set

Čech, Martin; Schlegel, M.

doi:10.3182/20110828-6-it-1002.01906

Cited by 9 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the tighter interaction with process controllers must be established to reach the maximum performance and reliability of CLPA methods. Point out that all the ideas presented in this paper are consistent with the authors' previous results in the area of controller autotuning [7], [8], [9].…”

Section: Introductionsupporting

confidence: 89%

See 1 more Smart Citation

Running discrete Fourier transform and its applications in control loop performance assessment

Schlegel

Skarda

Čech

2013

2013 International Conference on Process Control (PC)

View full text Add to dashboard Cite

Control loop performance assessment (CLPA) techniques are crucial for optimizing any plant or machine. They can bring huge energy and material savings and increase product quality. In this paper, the employment of running discrete Fourier transform (RDFT) in CLPA field is discussed. The first part of the paper documents the development of new RDFT function block which is suitable for CLPA. The paper focuses on implementation aspects whose aim is to minimize the number of arithmetic operations and to avoid numerical errors which are cumulated in many algorithms when running over longer time period. Then three RDFT applications are introduced. They are mostly dedicated to CLPA area: The changes in RDFT output help to detect increasing valve stiction or reveal a cause of oscillations in the loop. RDFT can be also used for continuous monitoring of process changes at particular frequencies. The most advanced problem presented is the estimation of special performance indices. More specifically, key samples of sensitivity function are gained and compared to the reference ones. Inspired by the model free design techniques, only a minimum a priori information about the process is assumed. The authors believe that the presented ideas will be suitable for both academic and industrial sphere.

show abstract

Section: Introductionsupporting

confidence: 89%

“…In this initial phase, also the PID controller is robustly tuned for this model set. Point out that for each frequency the model uncertainty can be exactly computed (see [8], [9] for details) and depicted as a closed value set in complex plane. The whole uncertainty area is bounded by two extremal processes.…”

Section: Remarkmentioning

confidence: 99%

Running discrete Fourier transform and its applications in control loop performance assessment

Schlegel

Skarda

Čech

2013

2013 International Conference on Process Control (PC)

View full text Add to dashboard Cite

show abstract

“…The authors' previous works [10] and a pioneering paper [16] vindicate the usage of first three moments m i of the impulse response h(t) instead of numbers obtained from the monotone step response using its tangent line in the inflexion point. They are defined as…”

Section: B Characteristic Numbers -Experimental Datamentioning

confidence: 99%

“…In authors' earlier works, the analytical relations for computing value set boundaries (extremal processes) were derived for both integer-order (IO) and fractional-order (FO) model set (see [17], [10] for more details). In Fig.…”

Section: Definition 3 (Extremal Transfer Function)mentioning

confidence: 99%

See 1 more Smart Citation

Optimal loop shaping compensators for fractional-order model set

Čech

Schlegel

2012

Proceedings of 2012 IEEE/ASME 8th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications

View full text Add to dashboard Cite

The paper deals with parametrization of shaping compensators (filters) ensuring the Bode's ideal control loop shape for an exactly defined class of process models. The class of essentially monotone fractional-order processes is considered. The fractional integrator is used as the optimal open loop reference model. Several aspects of shaping filter implementation on given frequency band are discussed. In contrast to the other known approaches, the exactly computed filter frequency response is approximated by the integer order zero/pole transfer function. The comparison with other methods shows that the direct approximation leads to the significant reduction of the filter order. Arisen filters are applicable especially for processes with large gain or load variations.

show abstract

Web-Based Fractional PID Controller Design: www.PIDlab.com

Čech

2018

IFAC-PapersOnLine

View full text Add to dashboard Cite

Interval PID Tuning Rules for a Fractional-Order Model Set

Cited by 9 publications

References 8 publications

Running discrete Fourier transform and its applications in control loop performance assessment

Running discrete Fourier transform and its applications in control loop performance assessment

Optimal loop shaping compensators for fractional-order model set

Web-Based Fractional PID Controller Design: www.PIDlab.com

Contact Info

Product

Resources

About