Change detection in the dynamics with recursive subspace identification. - Hiroshi Oku; G. Nijsse; Michel Verhaegen; Vincent Verdult (CDC, 2001)

Recursive 4SID algorithms using gradient type subspace tracking. - Hiroshi Oku; Hidenori Kimura (Autom., 2002)

Direct subspace model identification of LTI systems operating in closed-loop. - Hiroshi Oku; Takao Fujii (CDC, 2004)

Washout Control for Manual Operations. - Takashi Takimoto; Shigeru Yamamoto; Hiroshi Oku (IEEE Trans. Control. Syst. Technol., 2008)

Estimation error analysis of system matrices in some subspace identification methods. - Kenji Ikeda; Hiroshi Oku (ASCC, 2015)

Cyclic Reformulation-Based System Identification for Periodically Time-Varying Systems. - Hiroshi Okajima; Yusuke Fujimoto; Hiroshi Oku; Haruto Kondo (IEEE Access, 2025)