Abstract

Precise synchronization motion control has always been a problem need to be solved in the gantry-type NC machine tools (GNCMT) with a dual-drive system. The complexity of the system puts forward a great challenge for the setting of the PID controller parameters. In addition, one of the key elements which seriously affects the synchronization precision of the dual-drive system is disturbance. To realize the precise synchronization control, a mathematical model of the dual-drive system which combined with the mechanical coupling model of the gantry mechanism and the model of transmission system of each axis was presented firstly. And then, model parameters were identified based on Least Square(LS) method. In order to reduce the effects of friction and eccentric disturbance on the synchronization performance and improve the anti-interference performance of the system, a synchronization control strategy based on disturbance observer (DOB) which used the identified model as the nominal model was proposed. Finally, a simulation analysis was carried out. The simulation results showed that the synchronization performance of dual-drive system in GNCMT is obviously improved through the disturbance compensation.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.