Periodic adaptive disturbance observer for a Permanent Magnet Linear Synchronous Motor. - Kwanghyun Cho; Jinsung Kim; Heeram Park; Seibum B. Choi (CDC, 2012)

Precision motion control based on a periodic adaptive disturbance observer. - Kwanghyun Cho; Heeram Park; Seibum Choi; Sehoon Oh (IECON, 2012)

Development of a Sensorless Control Method for a Self-Energizing Brake System Using Noncircular Gears. - Heeram Park; Seibum B. Choi (IEEE Trans. Control. Syst. Technol., 2013)