Optimal charging of fractional-order circuits with Cuckoo search
A M AbdelAty1, Mohammed E Fouda2,3, Menna T M M Elbarawy1
1Engineering Mathematics and Physics Dept., Faculty of Engineering, Fayoum University, Egypt.
Introduction:
Optimal charging of RC circuits is a well-studied problem in the integer-order domain due to its importance from economic and system temperature hazards perspectives. However, the fractional-order counterpart of this problem requires investigation.
Objectives:
This study aims to find approximate solutions of the most energy-efficient input charging function in fractional-order RC circuits.
Methods:
This paper uses a meta-heuristic optimization technique called Cuckoo search optimizer to attain the maximum charging efficiency of three common fractional-order RC circuits. An analytical expression of the fractional capacitor voltage is suggested such that it satisfies the boundary conditions of the optimal charging problem. The problem is formulated as a fractional-order calculus of variations problem with compositional functional. The numerical solutions are obtained with the meta-heuristic optimization algorithm's help to avoid the complexities of the analytical approach.
Results:
he efficiency surfaces and input voltage charging curves are discussed for fractional-order in the range .
Conclusion:
The optimized charging function can approximate the optimal charging curve using at most 4 terms. The charging time and the resistive parameters have the most dominant effect on charging efficiency at constant fractional-order .
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