An automatic design procedure of IIR digital filters from an analog low-pass filter. - Koichi Ichige; Naohisa Otsuka; Rokuya Ishii (Signal Process., 1997)

Properties of the frequency transformation matrices for IIR digital filters. - Koichi Ichige; Naohisa Otsuka; Rokuya Ishii (Signal Process., 1998)

Generalized (C, A, B)-pairs and parameter insensitive disturbance-rejection problems with dynamic compensator. - Naohisa Otsuka (IEEE Trans. Autom. Control., 1999)

Robust disturbance-rejection problems for linear ω-periodic discrete-time systems. - Koji Shiomi; Naohisa Otsuka; Hiroshi Inaba (IEEE Trans. Autom. Control., 1999)

Generalized invariant subspaces and parameter insensitive disturbance-rejection problems with static output feedback and measurable disturbances. - Naohisa Otsuka (ACC, 2000)

A disturbance-rejection problem with dynamic compensator for linear ω-periodic discrete-time systems. - Naohisa Otsuka (CDC, 2000)

Generalized invariant subspaces and parameter insensitive disturbance-rejection problems with static output feedback. - Naohisa Otsuka (IEEE Trans. Autom. Control., 2000)

Generalized controlled and conditioned invariances for linear ω-periodic discrete-time systems. - Naohisa Otsuka (ECC, 2001)

Disturbance-rejection problems with low-order dynamic compensator for linear ω-periodic discrete-time systems. - Naohisa Otsuka (IEEE Trans. Autom. Control., 2001)

Generalized (C, A, B)-pairs for linear periodic discrete-time systems. - Naohisa Otsuka (ACC, 2002)

On simplified Hurwitz stability conditions for low-degree weighted diamond polynomials. - Naohisa Otsuka; Takashi Okada (J. Frankl. Inst., 2003)

A note on generalized invariant subspaces for infinite-dimensional systems. - Naohisa Otsuka (IMA J. Math. Control. Inf., 2004)

Necessary conditions for parameter insensitive disturbance rejection problem with dynamic output feedback. - Naohisa Otsuka (ACC, 2006)

A necessary and sufficient condition for parameter insensitive disturbance-rejection problem with state feedback. - Naohisa Otsuka (Autom., 2006)

Simultaneously controlled and conditioned invariances for a family of linear ω-periodic discrete-time systems. - Naohisa Otsuka (CDC, 2007)

Necessary and sufficient conditions for parameter insensitive disturbance-rejection problems with dynamic output feedback. - Naohisa Otsuka (IMA J. Math. Control. Inf., 2007)

Parameter insensitive disturbance-rejection problem with state feedback for uncertain linear ω-periodic discrete-time systems. - Naohisa Otsuka (J. Frankl. Inst., 2007)

The Spanning Trees Formulas in a Class of Double Fixed-Step Loop Networks. - Talip Atajan; Naohisa Otsuka; Xuerong Yong (ANALCO, 2009)

Generalized S(C, A, B)-Pairs for Uncertain Linear Infinite-Dimensional Systems. - Naohisa Otsuka; Haruo Hinata (J. Appl. Math., 2009)

Quadratic stabilizability for polytopic uncertain continuous-time switched linear systems by output feedback. - Takuya Soga; Naohisa Otsuka (ACC, 2010)

Counting the number of spanning trees in a class of double fixed-step loop networks. - Talip Atajan; Naohisa Otsuka; Xuerong Yong (Appl. Math. Lett., 2010)

Disturbance decoupling with quadratic stability for switched linear systems. - Naohisa Otsuka (Syst. Control. Lett., 2010)

A Note on Practically Output Tracking Control of Nonlinear Systems That May Not Be Linearizable at the Origin. - Keylan Alimhan; Naohisa Otsuka (FGIT-CA/CES3, 2011)

Disturbance Decoupling with Quadratic Stability for Polytopic Uncertain Switched Linear Systems. - Naohisa Otsuka; Hiroki Saito (ROCOND, 2012)

Stabilization for polytopic uncertain switched linear systems with constant input. - Takuya Soga; Naohisa Otsuka; Genki Nakayama; Akihiro Tojo (ASCC, 2013)

Disturbance decoupling via state feedback for uncertain switched linear systems. - Naohisa Otsuka; Hiroki Saito; Giuseppe Conte; Anna Maria Perdon (CDC, 2013)

The disturbance decoupling problem with stability for switching dynamical systems. - Giuseppe Conte; Anna Maria Perdon; Naohisa Otsuka (Syst. Control. Lett., 2014)

Disturbance decoupling via measurement feedback for switched linear systems. - Naohisa Otsuka (Syst. Control. Lett., 2015)

Stabilization of switched linear systems under arbitrary switching via switched observers. - Naohisa Otsuka; Daiki Kakehi (ASCC, 2017)

Robust controlled invariant subspaces and disturbance decoupling for uncertain switched linear systems. - Naohisa Otsuka; Hiroki Saito; Giuseppe Conte; Anna Maria Perdon (IMA J. Math. Control. Inf., 2017)

Interval Switched Positive Observers for Discrete-Time Switched Positive Systems under Arbitrary Switching. - Naohisa Otsuka; Daiki Kakehi (ANZCC, 2019)

Disturbance Decoupling by Dynamic Output Feedback for Linear Impulsive Systems with Periodic Jumps. - Elena Zattoni; Naohisa Otsuka; Anna Maria Perdon; Giuseppe Conte (MED, 2022)

SEIQRS Epidemic Model and its State Estimation using Positive Observer. - Hinata Sato; Naohisa Otsuka (ANZCC, 2024)

Interval reduced-order switched positive observers for uncertain switched positive linear systems. - Naohisa Otsuka; Daiki Kakehi; Przemyslaw Ignaciuk (CoRR, 2025)