Disk margin based robust stability analysis of a DC motor drive

Gopi, Pasala; Srinivasan, Suresh; Krishnamoorthy, Murugaperumal

doi:10.1016/j.jestch.2021.10.006

Cited by 8 publications

(9 citation statements)

References 14 publications

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“…The controller coefficients were obtained through the new control schemes, such as the ZN ultimate sensitivity and JAYA algorithm. To compare the DC drive performance, the Tree Seed algorithm and Skogestad IMC controllers (Gopi et al , 2022) were used.…”

Section: Matlab/simulation Results and Discussionmentioning

confidence: 99%

“…This section discusses the stability and performance of a DC drive with parameter uncertainty. The time-response function, such as the step, automatically samples the uncertainty parameter (Gopi et al, 2022) 20.03 0.0210 0.0750 Skogestad IMC (Gopi et al, 2022) 20.08 0.0220 0.1820 ZN ultimate sensitivity 64.12 0.0193 0.1552…”

Section: Simulation Results With Parameter Uncertaintymentioning

confidence: 99%

“…The most widely used control technique for many decades has been the PID controller because of its robust performance under a wide range of operating conditions. Most researchers have provided various types of control schemes for tuning PID controller coefficients in both the time and frequency domain (Gopi et al , 2022).…”

Section: Pid Controller and Its Tuningmentioning

confidence: 99%

“…The open-loop performance of the DC motor is low owing to the torque change during its speed control; however, with the DC motor in the closed-loop, a constant-speed operation is possible. Better dynamic characteristics, mitigation of system nonlinearity, load disturbance effects and good accuracy are the main advantages of closed-loop control of the DC motor (Gopi et al , 2022). Hamdi et al (2020) controlled induction motor speed using a sliding model control with a neural network.…”

Section: Introductionmentioning

confidence: 99%

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Novel approach to stability analysis of DC drive with parameter uncertainty and perturbation in feedback system

Gopi¹

2022

COMPEL

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Purpose The purpose of this study is to analyze direct current (DC) drive stability, including parameter uncertainty and perturbation in the feedback loop, by computing disk margins. Design/methodology/approach Although the closed-loop stability analysis of a DC drive has been presented well in the referenced papers, the effect of parameter uncertainty and perturbation in the feedback loop has not yet been discussed well. In this study, the conventional and disk-based stability margins were measured and compared for the nominal parameters of the DC drive. Subsequently, the smallest disk-based margins that destabilize the feedback loop for a given perturbation are computed and compared with normal disk margins. Findings The disk-based margin offered by the DC drive controlled by the JAYA-PID controller is disk gain margins (DGM) = 8.41 dB and disk phase margin (DPM) = 48.410 and the smallest disk-based margin offered is DGM = 1.51 dB and DPM = 9.950. In addition, the effect of the modeled uncertainty on the disk stability margins was analyzed, and it was observed that the maximum allowable parameter uncertainty with the JAYA controller was 73% of its nominal parameters. The simulation results were validated using an experimental testbed. Originality/value This research work is not published anywhere else.

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Section: Matlab/simulation Results and Discussionmentioning

confidence: 99%

Section: Simulation Results With Parameter Uncertaintymentioning

confidence: 99%

Section: Pid Controller and Its Tuningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel approach to stability analysis of DC drive with parameter uncertainty and perturbation in feedback system

Gopi¹

2022

COMPEL

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“…Although diferent control techniques have been proposed and implemented for the AVR loop, the PID controller remains the best choice for AVR. Te control strategies used for tuning PID controller coefcients are classifed into three categories: classical [5], intelligent [6][7][8][9][10], and heuristic methods [11][12][13][14]. In [15], a novel time-domain objective function was minimized by applying particle swarm optimization (PSO).…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior and Stability Analysis of Automatic Voltage Regulator with Parameter Uncertainty

Gopi¹,

Varma

Kalyan³

et al. 2023

International Transactions on Electrical Energy Systems

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This research article describes a novel optimization technique called simulink design optimization (SDO) to compute the optimal PID coefficients for an automatic voltage regulator (AVR). The time-domain performance of the proposed controller was analyzed using MATLAB/Simulation, and its performance was compared with that of water cycle algorithm, genetic algorithm, and local unimodal sampling algorithm-based PID controllers. The robustness of the proposed controller was verified by applying the disturbances to the generator field voltage and the amplifier parameter uncertainty. The studies presented in literature were discussed the AVR loop stability using the Bode plot which will not give the minimum stability margins. This study proposes a novel stability analysis called disk-based stability analysis to authenticate the stability of the AVR loop which is obtained by the classical analysis. This stability was compared with the proposed stability analysis. The MATLAB results reveal that the SDO-PID controller regulates the terminal voltage of the generator precisely, is more robust to parameter uncertainty, and is more stable than the other controllers. The maximum allowable parameter uncertainty of the amplifier model was identified as 102% of its nominal parameters. The stability margins are recognized as DGM = 10.40 dB and DPM = 56.50° for the AVR stability.

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A formulation to validate the design selections stated in the linear active disturbance rejection control technique

Prasanna,

Narayanan

2024

Int. J. Dynam. Control

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Disk margin based robust stability analysis of a DC motor drive

Cited by 8 publications

References 14 publications

Novel approach to stability analysis of DC drive with parameter uncertainty and perturbation in feedback system

Novel approach to stability analysis of DC drive with parameter uncertainty and perturbation in feedback system

Dynamic Behavior and Stability Analysis of Automatic Voltage Regulator with Parameter Uncertainty

A formulation to validate the design selections stated in the linear active disturbance rejection control technique

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