JAE-MIN LEE
Professor
Jae-Min Lee received the Ph. D degree in electrical and computer engineering form the Seoul National University, Seoul, Korea, in 2005.
From 2005 to 2014, he was a Senior Engineer with Samsung Electronics, Suwon, Korea. From 2015 to 2016, he was a Principle Engineer in Samsung Electronics, Suwon, Korea. Since 2017, he has been an assistant professor with School of Electronic Engineering and Department of IT-Convergence Engineering, Kumoh National Institute of Technology, Gyeongbuk, Korea. He is a member of IEEE. His current main research interests are industrial wireless control network, performance analysis of wireless networks, and TRIZ.
RESEARCH AREA
Industrial wireless control network, performance analysis of wireless networks, TRIZ
EDUCATION
Ph.D, School of ECE
Seoul National University, Korea
(Member of the IEEE and Life Member of the KICS)
CAREER
Principal engineer , Samsung Electronics
KIT Electonic an assistant Professor
Professor of Industrial Academic Cooperation Foundation
Professor, Convergence Technology Research Institute
Director, Department of Defense Studies (KICS)
PHONE & EMAIL
054-478-7475 & ljmpaul@kumoh.ac.kr, ljmpaul@naver.com
SELECTED PAPER
Control Engineering Practice 11, 1301-1313
This paper proposes a new method to obtain a maximum allowable delay bound for a scheduling of networked control systems. The proposed method is formulated in terms of linear matrix inequalities and can give a much less conservative delay bound than the existing methods. A network scheduling method is presented based on the delay obtained through the proposed method, the bandwidth of a network is allocated to each node and the sampling period of each sensor and controller is determined. The presented method can handle three types of data (periodic data, sporadic data, and message) and guarantees real-time transmission of periodic and sporadic data, and minimum network utilization for non-real time message.
Industrial Informatics, IEEE Transactions on 8 (1), 61-68
This paper proposes gradient routing with two-hop information for industrial wireless sensor networks to enhance real-time performance with energy efficiency. Two-hop information routing is adopted from the two-hop velocity-based routing, and the proposed routing algorithm is based on the number of hops to the sink instead of distance. Additionally, an acknowledgment control scheme reduces energy consumption and computational complexity. The simulation results show a reduction in end-to-end delay and enhanced energy efficiency.
Control Systems Technology, IEEE Transactions on 10 (3), 318-330
This paper presents a scheduling method for network-based control systems with three types of data (periodic data, sporadic data, and messages). As a basic parameter for the scheduling method for network-based control systems, a maximum allowable delay bound is used,which guarantees stability of network-based control systems and is derived from characteristics of the given plant using the presented theorems. The presented scheduling method for network-based control systems can adjust the sampling period as small as possible, allocate the bandwidth of the network for three types of data, and exchange the transmission orders of data for sensors and actuators.