Invited Speakers

Invited Speakers

Novel evaluation method for motion trajectory of machine tool feed drives based on human visual sensitivity

Prof. Ryuta Sato
Designated Professor, Nagoya University (Japan)
E-mail : ryuta.sato@mae.nagoya-u.ac.jp

Machined surface quality is typically evaluated based on their visibility through human eyes, especially in dies and molds, and designed surfaces such as smart phone cases. Visible glitches are frequently observed on the surface due to imperfection of motion trajectory of machine tool feed drives. Regarding the problem, it is empirically known that the visibility of the glitches is not directly related with size of the errors. This study proposes a novel motion trajectory evaluation method based on human visual sensitivity related with surface quality. The human visual sensitivity is investigate based on the reflectance model and the visible limit of the geometrical property is formulated. Motion trajectories are evaluated based on the investigated visual sensitivity to demonstrate validity of the proposed method.

Biography
Prof. Sato is currently a designated professor at Graduate School of Engineering, Nagoya University, Japan. He received his PhD degree in Engineering from Tokyo University of Agriculture & Technology (TUAT). He started to work at TUAT as an assistant professor, after that he joined in Advanced Technology R&D center in Mitsubishi Electric Corporation. He joined Kobe University in 2010 and Nagoya University in 2022. His research areas include modeling and control of NC machine tools, feed drive systems, and five-axis machining technologies. He has published more than 100 academic papers and owned around 30 patents of PCT, USA, Europe and Japan. He received more than 20 awards such as the JSME Medal for Outstanding Paper in 2019, Young Scientists’ Prize from the Minister of Education, Culture, Sports, Science and Technology in 2015, and JSPE Best Paper Award in 2007.

Research activities in the Industrial Cyber-Physical Systems Research Center, AIST for human-centric digital manufacturing

Dr. Kiwamu Ashida
Director-General, Hokuriku Digital Manufacturing Center, AIST (Japan)
E-mail : ashida.k@aist.go.jp

The Industrial Cyber Physical Systems Research Center, AIST, drives the development of digital manufacturing by using technology that integrates AI, robots, sensors, etc. to cooperate with humans to solve the problems of declining birthrate and aging population, which is one of the social issues in Japan. Our research works aim to establish technologies for the optimization of labor input resources, improvement of employee quality of work, creation of new customer value, inheritance of skills, and sophistication in anticipation of changes in the industrial structure. In the talk, our research activities will be presented, including the factory environment in the manufacturing field and the retail store environment in the logistics field, and are promoting industry-academia-government collaboration activities through collaborative research and consortium partnerships. In addition, we will introduce the newest research site in Hokuriku, which opened last year.

Biography
Dr. Kiwamu Ashida has been a researcher at the National Institute of Advanced Industrial Science and Technology (AIST). He started his career at the Mechanical Engineering Laboratory (MEL, restructured in AIST in 2001) in 1998 and is the Director-General of the newly opened Hokuriku Digital Manufacturing Center. His expertise is manufacturing technology for mechanical parts and systems, originally about subtractive processes, such as cutting, grinding, polishing, and machine tools. The outstanding establishment was the machining microfactory installed in a potable suitcase-size developed in 2000, which demonstrated the potential of miniature machine tools. After a visiting researcher in VTT, Finland in 2008, he has been involved in a Japanese national project of additive manufacturing technology since 2013, especially for international standardization work of ISO/TC261 and ASTM F42 as an expert, convener of Joint Group 77, and chair of the national mirror committee in Japan. His current research area covers all manufacturing processes and systems that promote the application of digital manufacturing technologies. He received his Ph.D. in 1998 and graduated from Chiba University through bachelor, master, and doctoral courses. He is a member of JSME, a fellow of JSPE, and a director of JSAT.