6781097310

Andrzej WAWRZAK Kazimierz KARWOWSKI Krzysztof KARWOWSKI Sławomir MANDRA Mirosław MIZAN

TRACKING ERRORS DECREASING IN CNC SYSTEM OF MACHINĘ TOOLS

ABSTRACT    In the paper the procedures and practical

methods of tracking errors compensation in servo-drives are considered. The PID controllers of servo-drives do not decrease tracking errors enough in the case of fast changes of the motion velocity. The good method of decreasing of the tracking errors in cascade servo-dhves is to use the feedforward command and feedforward friction compensation. The exemplary results of the test of CNC system based on servo-drives with PMSM motors with proposed control method including the on-line calculation of feedforward loops parameters are presented.

Keywords: CNC system, tracking error compensation, on-line calculation

Andrzej WAWRZAK, M.Sc., Kazimierz KARWOWSKI, Ph.D., Sławomir MANDRA, M.Sc.

e-mail: [e-mail], [e-mail], [e-mail]

Nicolaus Copernicus University, Faculty of Physics,

Astronomy and Informatics,

Grudziądzka 5/7, 87-100 Toruń, POLAND

Krzysztof KARWOWSKI, D.Sc., Mirosław MIZAN, Ph.D.

e-mail: [e-mail], [e-mail]

Gdańsk University of Technology,

Faculty of Electrical and Control Engineering,

Narutowicza 11/12, 80-952 Gdańsk, POLAND

PROCEEDINGS OF ELECTROTECHNICAL INSTITUTE, Issue 240, 2009