Design of Low-Voltage FO-[PD] Controller for Motion Systems

Fractional-order controllers have gained significant research interest in various practical applications due to the additional degrees of freedom offered in their tuning process. The main contribution of this work is the analog implementation, for the first time in the literature, of a fractional-order controller with a transfer function that is not directly constructed from terms of the fractional-order Laplacian operator. This is achieved using Pade approximation, and the resulting integer-order transfer function is implemented using operational transconductance amplifiers as active elements. Post-layout simulation results verify the validity of the introduced procedure.

Automated summary

This work presents an analog implementation of a fractional-order controller, using Pade approximation to derive an integer-order transfer function instead of directly constructing from terms of the fractional-order Laplacian operator. Operational transconductance amplifiers are used as active elements for implementation, and post-layout simulation results validate the introduced procedure.