Jun-Keun Ji

Papers

Total Citations

216

H-Index

About

Jun-Keun Ji is a leading authority in advanced motor drive control, with a career focused on suppressing torsional vibrations in electromechanical systems. His seminal 1995 paper, “Kalman filter and LQ based speed controller for torsional vibration suppression in a 2-mass motor drive system,” has garnered 216 citations and remains a cornerstone in the field. In this work, Ji pioneered a high-performance speed control method that integrates Kalman filtering with linear-quadratic (LQ) optimal control to dampen oscillations in systems like rolling mills with long shafts and large load-side masses, as well as robot arms with flexible couplings. His approach dramatically improves control response and stability, addressing a critical challenge in industrial automation and robotics. By combining state estimation with optimal regulation, Ji’s contributions have enabled more precise and reliable operation of heavy machinery and robotic systems, influencing subsequent research in mechatronics and power electronics. His work stands as a key reference for engineers and researchers developing robust, vibration-free motor drives, cementing his legacy as a pioneer in torsional vibration control.