Observer-based closed-loop estimation of tunneling current parameters with experimental application

Abstract

This paper proposes an observer-based approach towards parameter estimation for tunneling current modeling. Since getting and using tunneling current strongly rely on feedback control, a first study on possible closed-loop operation without knowing tunneling current parameters is first provided. Then, owing to this possible closed-loop configuration, the proposed estimation approach is presented. Some application results finally illustrate the methodology with experimental data taken from an STM-like prototype.