Smooth Trajectory Generation and Robust Motion Control Strategies for Precision Machine Tools and High Speed Drives
Dr. Burak Sencer, Nagoya University
Date: Friday, December 20, 2013
Place: EA 409
This presentation covers some of the presenter’s research outcomes in precision motion generation for CNC (computer numerical controlled) machine tools, and also in advanced manufacturing. Firstly, development of reference trajectory generation techniques for modern machine tools will be presented. Due to rich frequency content of the reference motion trajectory, lightly damped structural or servo induced vibration modes of the feed drive system may be excited. These vibrations are known as the “residual vibration” and jeopardize precision positioning accuracy. Practical strategies and proposal of a frequency optimal spline trajectory generation method to minimize residual vibration in precision motion systems will be presented. Next, precision motion control of multi-axis positioning stages will be discussed. Particularly, design and application of robust “Sliding Mode Control” (SMC) technique in precision motion control of 5-axis CNC machine tools will be introduced. Due to its non-linear switching control law, the use of SMC in precision motion systems has been very limited. But, it is widely used in aerospace industry. The applicant will present novel design of smooth continuous-time adaptive SMC for accurate positioning of servo systems. At last, development of a mechatronics orientated approach for advanced manufacturing is presented. The presenter will also briefly summarize his future research directions
About the Speaker:
Dr. Burak Sencer was born in Izmir/Turkey, in 1980. He graduated from the Istanbul Technical University (ITU) with a Ba.Sc. in 2003 as the top of this class. Upon finishing his undergraduate studies, he moved to Vancouver, Canada. He joined the Manufacturing Automation Laboratories (MAL) and obtained his Ma.Sc. and Ph.D degrees at the Mechanical Engineering Department of the University of British Columbia (UBC) under the supervision Prof. Yusuf Altintas in 2005 and 2009, respectively. During his graduate studies, Dr. Sencer investigated precision motion generation in 5-axis CNC machine tools. In 2010, Dr. Sencer moved to the Nagoya University in Japan and joined the Ultra-precision Engineering Laboratory(UPR) to conduct research under supervision of Prof. Eiji Shamoto. He has won the respected Japan Society for Promotion of Science (JSPS) Post-Doctoral research fellowship twice. Currently, he is an designated assistant professor at the Nagoya University Graduate School of Engineering and conducting research on advanced manufacturing, precision NC systems and motion controls.