Internet-Based Fuzzy Decentralized Microprocessor Control for a Two-Dimensional Piezo-Driven System

In this paper, the trajectory tracking of a two-dimensional piezo-driven system (2DPDS) using Internet-based fuzzy decentralized microprocessor control (IBFDMC) was developed. It was known that the piezoelectric actuator contained hysteresis, which was not one-to-one mapping and memory nonlinearity. Due to this nonlinearity and the coupling characteristic of 2DPDS, an effective decentralized control was difficult to design. From the very beginning, suitable coefficients of switching surface were assigned to stabilize the switching surface and to shape the response of tracking error. Based on the data of input-output, two scaling factors are employed to normalize the switching surface and its derivative. According to the concept of if-then rule, an appropriate rule table for the ith subsystem was then achieved. Finally, a sequence of experiments was carried out to confirm the usefulness of the proposed control.