A Circuit Model for Open-Loop Compensation of Hysteresis

Hysteresis is a nonlinear phenomenon useful whenever memory is required, but that can become annoying in applications where linearity is desired. In these cases, a possible way to reduce the inconvenience is to compensate the undesired memory effect by pre-processing the input signal through the hysteresis inverse model. In this paper, the inverse of a recently proposed circuit modeling rate-independent hysteretic phenomena is presented and discussed. The inverse circuit model is tested through experimental data measured from a commercial piezoelectric actuator. The obtained results are compared with those obtained by resorting to the well-known Preisach model. All the circuit simulations are performed by using PSPICE.