Modelling and control of a galvanometer for the application to a laser engraving system

Object of the present work is the development of a control system able to increase performances of the industrial laser marking process. The laser marking is performed by a system called “galvanometer scanning head”, that is composed of special actuators known as “galvanometers”, which are used to control the positions of mirrors able to properly guide a laser beam in order to engrave a desired shape on an object placed on the working table. In particular authors have developed a simplified model of system including drive and sensor stages. This model has been further verified and calibrated with experimental tests. An innovative control strategy able to significantly improve the response of the system respect to a previously developed controller has been proposed. Both controllers have been tested and compared experimentally showing a significant of improvement of the innovative controller respect to the conventional one.

[1]  Stefan Preitl,et al.  Mathematical model of a galvanometer-based scanner: simulations and experiments , 2013, Optical Metrology.

[2]  Theodore Mirtchev,et al.  Optimizing the feedback control of Galvo scanners for laser manufacturing systems , 2010, Photonics North.

[3]  Jing Feng,et al.  Digital implementation of a galvanometric optical scanner based on DSP and FPGA , 2011, 2011 International Conference on Mechatronic Science, Electric Engineering and Computer (MEC).

[4]  Damian Kacperski,et al.  Custom design of galvanometric motor for large mirror , 2015, 2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES).

[5]  Chung Choo Chung,et al.  Multirate output feedback control and its application to galvanometer servo systems , 2003, Proceedings of the 2003 American Control Conference, 2003..

[6]  Hans-Peter Seidel,et al.  A Mathematical Model and Calibration Procedure for Galvanometric Laser Scanning Systems , 2011, VMV.

[7]  ZhiJiang,et al.  Digital implementation of a galvanometric optical scanner based on DSP and FPGA , 2011 .

[8]  Luca Pugi,et al.  An hydraulic test rig for the testing of quarter turn valve actuation systems , 2014, 2014 IEEE/ASME 10th International Conference on Mechatronic and Embedded Systems and Applications (MESA).

[9]  Stefan Preitl,et al.  Classical PID versus predictive control solutions for a galvanometer-based scanner , 2015, 2015 IEEE 10th Jubilee International Symposium on Applied Computational Intelligence and Informatics.

[10]  Makoto Iwasaki,et al.  Improvement of Adaptive Property by Adaptive Deadbeat Feedforward Compensation Without Convex Optimization , 2015, IEEE Transactions on Industrial Electronics.

[11]  Yi Zhang High performance DSP-based servo drive control for a limited-angle torque motor , 1997 .

[12]  Ming-Yang Cheng,et al.  Taguchi method based model predictive control design for laser scanner , 2011, 2011 8th Asian Control Conference (ASCC).

[13]  Luca Pugi,et al.  Preliminary design and validation of a Real Time model for hardware in the loop testing of bypass valve actuation system , 2015 .

[14]  Luca Pugi,et al.  Design and Testing of an Innovative Wire Transmission for a Quarter-Turn Actuator , 2016 .

[15]  Monica Malvezzi,et al.  Feasibility of degraded adhesion tests in a locomotive roller rig , 2008 .

[16]  Luca Pugi,et al.  Design and testing of a pulley and cable actuator for large ball valves , 2016, J. Syst. Control. Eng..