Open AccessDual stage control of a servo system consisting of a piezoelectric actuator and a linear motor for electrical discharge machining
Author(s) -
Muyad K Bani Melhem,
Milan Simić,
Yong Feng,
Songlin Ding
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/715/1/012051
Subject(s) - electrical discharge machining , servomotor , machining , linear motor , servo , actuator , ultrasonic motor , piezoelectricity , control theory (sociology) , servo drive , process (computing) , materials science , rotary actuator , mechanical engineering , computer science , engineering , control (management) , electrical engineering , composite material , artificial intelligence , operating system
Gap width is the most important factor that affects the stability of the electrical discharge machining (EDM) process, material removal rate and surface finish of the workpiece. This research is to develop a new hybrid positioning system which consists of a linear servo motor and a piezoelectric actuator (PZT) for high efficiency EDM processes. In this new system, the servo motor provides the macro feeding for the workpiece while the PZT feeds the workpiece in micro scale at high frequency. To reduce the delay caused by separate movements of the linear motor and PZT, a new control algorithm was developed to synchronize the movements of both the motor and PZT. Cutting experiment shows that an increase in MRR of 1.5 times was achieved by using the proposed algorithm.