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Author

Cristina I. Muresan

Other affiliations: Core Laboratories
Bio: Cristina I. Muresan is an academic researcher from Technical University of Cluj-Napoca. The author has contributed to research in topics: PID controller & Control theory. The author has an hindex of 14, co-authored 122 publications receiving 1046 citations. Previous affiliations of Cristina I. Muresan include Core Laboratories.

Papers published on a yearly basis

Papers
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Proceedings ArticleDOI
11 Oct 2018
TL;DR: An experimental fractional order model is obtained that describes the dynamics of the robot inside a secluded part of the circulatory system in terms of velocity profile and position.
Abstract: This paper tackles the field of applied control engineering in the nanomedical field, both in terms of modeling and control of the dynamics of a scalable robot transiting a vascular environment. An experimental fractional order model is obtained that describes the dynamics of the robot inside a secluded part of the circulatory system in terms of velocity profile and position. The submersible has concentration sensing capabilities and when a difference is detected in the liquid's concentration, a Fractional Order Proportional Integrative (FOPI) controller is used to control the robot's velocity and position inside the vascular homology. The work is based on experimental data acquired from a dedicated platform designed and built to echo environmental traits of the circulatory system for analysis and control purposes.

2 citations

Proceedings ArticleDOI
01 May 2020
TL;DR: A novel generalization of available integer-order event based control strategies into the fractional order field is presented, offering a real life implementation possibility of event based fractional orders control.
Abstract: The paper presents a novel generalization of available integer-order event based control strategies into the fractional order field, offering a real life implementation possibility of event based fractional order control. A fractional order Proportional Integral (FOPI) controller is tuned using a set of frequency domain specifications such as gain crossover frequency, phase margin and robustness. A generalized theoretical approach is developed for FOPI event based control strategies. In addition, real-life solutions are provided in order to implement the FOPI controller on a Vertical Take-Off and Landing (VTOL) platform. The proposed methodology is validated experimentally by assessing the closed loop system performance in various scenarios such as step reference tracking, disturbance rejection and robustness to gain uncertainties.

2 citations

Journal ArticleDOI
TL;DR: The experimental validation of a previously presented direct autotuner method is presented, which requires only one simple sine test on the process to compute the PID controller parameters and is shown to be a valuable option for controlling industrial processes.

2 citations

Proceedings ArticleDOI
17 May 2018
TL;DR: A new methodology for PID control tuning based on particle swarm optimization that will facilitate the convergence to an optimal controller and thus to an increased performance is introduced.
Abstract: This paper introduces a new methodology for PID control tuning. The proposed method is based on particle swarm optimization. In oder to deal with the limitation of the real process and to generate feasible solutions for industrial applications, constrained control effort is introduced into the objective formulation function. For validation, the proposed algorithm has been tested on a manipulator robot. The tuning of the PID controller is formulated as an optimization problem with the aim of optimizing two or more objective functions while satisfying several inequality constraints. By using this approach, the developed algorithm will facilitate the convergence to an optimal controller and thus to an increased performance. The experimental results indicate that the new approach is suitable for control of complex system.

2 citations

Proceedings ArticleDOI
01 Sep 2015
TL;DR: In this article, a vector-based fractional order parameter tuning algorithm was proposed to simplify the tuning procedure for DC motor control, and the control aspect of the auto-tuning was studied in velocity control of DC motor.
Abstract: Most of the tuning techniques for fractional order controllers deal with complex computations and optimization routines, not suitable for auto-tuning control schemes. This research paper proposes a novel, vector based fractional order parameter tuning algorithm which considerably simplifies the procedure. The control aspect of the auto-tuning fractional order control scheme is studied in velocity control of DC motor.

2 citations


Cited by
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Journal ArticleDOI

[...]

08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

Book ChapterDOI
01 Jan 2015

3,828 citations

Journal ArticleDOI
TL;DR: This review investigates its progress since the first reported use of control systems, covering the fractional PID proposed by Podlubny in 1994, and is presenting a state-of-the-art fractionalpid controller, incorporating the latest contributions in this field.

447 citations

01 Jan 2016
TL;DR: Formulas for natural frequency and mode shape is available in the authors' book collection an online access to it is set as public so you can get it instantly.
Abstract: formulas for natural frequency and mode shape is available in our book collection an online access to it is set as public so you can get it instantly. Our book servers hosts in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the formulas for natural frequency and mode shape is universally compatible with any devices to read.

333 citations

Journal ArticleDOI
TL;DR: An aggregate model of EV fleets and improved version of fractional order (FO) controller is provided in all the areas for robust LFC considering bilateral transactions and Numerous simulations are conducted to validate the superiority of the proposed control strategy.
Abstract: Introduction of vehicle-to-grid technology offer electric vehicles (EVs) to participate in different ancillary services under competitive electric market. EVs provide an opportunity to grow new products and services for grid management. Particularly, EVs, which is a new form of distributed energy storage, can be used to compensate the uncontracted power in the local area if the contracts between the market players are violated. This paper presents the participation of EVs for load frequency control (LFC) under deregulated environment along with other conventional sources such as hydro, thermal, and gas turbine units. An aggregate model of EV fleets and improved version of fractional order (FO) controller is provided in all the areas for robust LFC considering bilateral transactions. Flower pollination algorithm, which is one of the new proven nature inspired algorithm employed to choose the optimal parameters of the FO controllers under several scenarios. Numerous simulations are conducted to validate the superiority of the proposed control strategy.

199 citations