| Summary: | In this paper, we propose a method of practical realization and an actual, physical hardware implementation of a fractional variable-type and order difference operator that switches between two (i.e., <inline-formula> <math display="inline"> <semantics> <mi mathvariant="script">B</mi> </semantics> </math> </inline-formula>- and <inline-formula> <math display="inline"> <semantics> <mi mathvariant="script">D</mi> </semantics> </math> </inline-formula>-type) variable-order definitions. After the theoretical model of such a switch, we report the experimental validation on an analog model to prove its adequacy. The tests prove with great certainty that the proposed model and the realization behave correctly. They also let the authors assume that the proposed method is the only one suitable for this case, based on the counterexamples presented.
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