Proceedings ArticleDOI
Analytical modeling and preliminary fractional order velocity control of a small scale submersible
Isabela Roxana Birs,Cristina I. Muresan,Ovidiu Prodan,Silviu Folea,Clara M. Ionescu +4 more
- pp 165-170
TLDR
In this paper, a first order transfer function with time delay is developed to make the connection between the voltage applied to the motor actuating the propeller and the velocity of the submersible.Abstract:
This paper presents the modeling and control of a small scale submersible equipped with one propeller. The modeling process takes into consideration physical elements such as fluid statics, viscous damping and propulsive thrust. A first order transfer function with time delay is developed to make the connection between the voltage applied to the motor actuating the propeller and the velocity of the submersible. The velocity control is realized with a Fractional Order Proportional Integral (FOPI) controller that ensures zero steady state error. The controller is designed based on frequency domain specifications such as gain crossover frequency, phase margin and robustness to gain variations. The obtained fractional controller is validated through simulation in terms of steady state error and disturbance rejection performance.read more
Citations
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Formulas For Natural Frequency And Mode Shape
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.
Journal ArticleDOI
Single active element implementation of fractional-order differentiators and integrators
TL;DR: A novel topology based on the employment of a second generation Current Conveyor with EXtra inputs (EX-CCII), passive resistors, and fractional-order capacitors is presented, which offers the main benefit that both fractiona-order differentiator and integrator transfer functions are simultaneously available at different output terminals.
Journal ArticleDOI
Identification for control of suspended objects in non-Newtonian fluids
Isabela Roxana Birs,Isabela Roxana Birs,Cristina I. Muresan,Dana Copot,Ioana Nascu,Clara-Mihaela Ionescu +5 more
TL;DR: In this paper, a framework for modelling velocity profiles and suspended objects in non-Newtonian fluid environment is proposed to allow mimicking blood properties and arterial to venous dynamic flow changes.
Journal ArticleDOI
Robust fractional order PI control for cardiac output stabilisation
Isabela Roxana Birs,Isabela Roxana Birs,Dana Copot,Cristina I. Muresan,Robain De Keyser,Clara-Mihaela Ionescu,Clara-Mihaela Ionescu +6 more
TL;DR: In this work, a biomedical application requiring robust control properties has been used to illustrate the potential of an autotuned method, referred to as the fractional order robust autotuner, which is an extension of a previously presented autotuning principle and produces controllers which are robust to system gain variations.
Proceedings ArticleDOI
An event based implementation of a fractional order controller on a non-Newtonian transiting robot.
TL;DR: The present study tackles the event-based implementation of fractional controllers by implementing a Fractional Order Proportional Derivative that controls the position of the nanorobot, validating the presented solution for implementing fractional order event based controllers.
References
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Formulas For Natural Frequency And Mode Shape
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.
Journal ArticleDOI
On development of fractional calculus during the last fifty years
TL;DR: The evolution of fractional calculus is addressed and an assertive measure of the research development is established.