Open AccessApplication of a Pid+fuzzy controller on the motion control system in machine tools
Author(s) -
Helder Barbieri Lacerda,
Eduardo Morgado Belo
Publication year - 1999
Publication title -
revista brasileira de ciências mecânicas
Language(s) - English
Resource type - Journals
ISSN - 0100-7386
DOI - 10.1590/s0100-73861999000300004
Subject(s) - pid controller , control theory (sociology) , backlash , fuzzy logic , control engineering , computer science , controller (irrigation) , control system , engineering , control (management) , artificial intelligence , temperature control , agronomy , electrical engineering , biology
This work deals with an hybrid PID+fuzzy logic controller applied to control the machine tool biaxial table motions. The non-linear model includes backlash and the axis elasticity. Two PID controllers do the primary table control. A third PID+fuzzy controller has a cross coupled structure whose function is to minimise the trajectory contour errors. Once with the three PID controllers tuned, the system is simulated with and without the third controller. The responses results are plotted and compared to analyse the effectiveness of this hybrid controller over the system. They show that the proposed methodology reduces the contour error in a proportion of 70:1