Page 989 - The Mechatronics Handbook

FIGURE 33.14 Cylinder position.

FIGURE 33.15 Electrohydraulic axis control with a fuzzy controller with two inputs.

33.5 Control of Electrohydraulic Axis with Fuzzy Controllers

Section 33.5 of this contribution is devoted to the presentation and the testing of nontraditional con-
trollers based on fuzzy sets, which model the behavior of a human operator in the control process. The
simulation results of an electrohydraulic axis with SUGENO and MAMDANI controllers are depicted.
For the same number of inference rules extracted from the knowledge base, simulations proved that
dynamic performances are improved for a fuzzy controller with two inputs.
The scheme achieved with SIMULINK to control the electrohydraulic axis with two inputs fuzzy
controller and a MAMDANI or SUGENO inference is depicted in Fig. 33.15.
The results presented concern the simulation of the hydraulic axis endowed with a fuzzy controller,
which is based on MAMDANI inference [59]. “Fuzzy Logic” toolbox gives the user the possibility to
create MAMDANI or SUGENO fuzzy systems using graphic interfaces. FIS (Fuzzy Inference System)
Editor, Membership Function Editor, and Inference Rules Editor are several of the tools available in
SIMULINK. For instance, the corresponding FIS editor and the Membership Function Editor of each
input for the proposed fuzzy controller with MAMDANI inference and two inputs are illustrated in Figs.
33.16 and 33.17

©2002 CRC Press LLC