267 citations · 795 across the 27 of their papers we have counts for
6 papers · 1 filter
Extending the Concept of Analog Butterworth Filter for Fractional Order Systems
Anish Acharya, Saptarshi Das, Indranil Pan +1
This paper proposes the design of Fractional Order (FO) Butterworth filter in complex w-plane (w=sq; q being any real number) considering the presence of under-damped, hyper-damped…
Optimizing Continued Fraction Expansion Based IIR Realization of Fractional Order Differ-Integrators with Genetic Algorithm
Saptarshi Das, Basudev Majumder, Anindya Pakhira +3
Rational approximation of fractional order (FO) differ-integrators via Continued Fraction Expansion (CFE) is a well known technique. In this paper, the nominal structures of variou…
On the Selection of Tuning Methodology of FOPID Controllers for the Control of Higher Order Processes
Saptarshi Das, Suman Saha, Shantanu Das +1
In this paper, a comparative study is done on the time and frequency domain tuning strategies for fractional order (FO) PID controllers to handle higher order processes. A new frac…
Fractional Order Phase Shaper Design with Routh's Criterion for Iso-damped Control System
Suman Saha, Saptarshi Das, Ratna Ghosh +5
Phase curve of an open loop system is flat in nature if the derivative of phase with respect to frequency is zero. With a flat phase curve, the corresponding closed-loop system exh…
A Conformal Mapping Based Fractional Order Approach for Sub-optimal Tuning of PID Controllers with Guaranteed Dominant Pole Placement
Suman Saha, Saptarshi Das, Shantanu Das +1
A novel conformal mapping based Fractional Order (FO) methodology is developed in this paper for tuning existing classical (Integer Order) Proportional Integral Derivative (PID) co…
Design of a Fractional Order Phase Shaper for Iso-damped Control of a PHWR under Step-back Condition
Suman Saha, Saptarshi Das, Ratna Ghosh +5
Phase shaping using fractional order (FO) phase shapers has been proposed by many contemporary researchers as a means of producing systems with iso-damped closed loop response due…