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This paper presents a linear time-variant system for signal modulation. The system consists of a beam surface-bonded by two pairs of piezoelectric patches and suspended by magnetorheological elastomers (MREs) at its two ends. One pair of piezoelectric patches is excited by an applied electrical signal to induce bending deformations on the beam and the other pair converts the bending deformations into an electrical signal. These two electrical signals are the input and the output of the systemdoi:10.1088/0964-1726/14/6/008 fatcat:unywljy3jfhejpnglifzozbzg4