Hu J, Yamada K, Sakanushi T, Nakui Y, Atsuta Y. A Design Method for Control System to Attenuate Periodic Input Disturbances Using Disturbance Observers for Time-Delay Plants. ECTI-EEC [internet]. 2012 Jul. 12 [cited 2026 Sep. 18];11(1):37-46. available from: https://ph02.tci-thaijo.org/index.php/ECTI-EEC/article/view/170607