start-ver=1.4 cd-journal=joma no-vol=38 cd-vols= no-issue=8 article-no= start-page=1283 end-page=1284 dt-received= dt-revised= dt-accepted= dt-pub-year=1993 dt-pub=19938 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A direct computation of state deadbeat feedback gains en-subtitle= kn-subtitle= en-abstract= kn-abstract=A method for computing a feedback gain that achieves state deadbeat control is given. From systems given in the staircase form, this method derives the deadbeat gain in a numerically reliable way. It is shown that the gain turns out to be LQ optimal for some weightings. en-copyright= kn-copyright= en-aut-name=SugimotoKenji en-aut-sei=Sugimoto en-aut-mei=Kenji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=InoueAkira en-aut-sei=Inoue en-aut-mei=Akira kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MasudaShiro en-aut-sei=Masuda en-aut-mei=Shiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=feedback kn-keyword=feedback en-keyword=optimal control kn-keyword=optimal control END start-ver=1.4 cd-journal=joma no-vol=51 cd-vols= no-issue=4 article-no= start-page=645 end-page=648 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=200604 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Operator-based nonlinear feedback control design using robust right coprime factorization en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this note, robust stabilization and tracking performance of operator based nonlinear feedback control systems are studied by using robust right coprime factorization. Specifically, a new condition of robust right coprime factorization of nonlinear systems with unknown bounded perturbations is derived. Using the new condition, a broader class of nonlinear plants can be controlled robustly. When the spaces of the nonlinear plant output and the reference input are different, a space change filter is designed, and in this case this note considers tracking controller design using the exponential iteration theorem. en-copyright= kn-copyright= en-aut-name=DengMingcong en-aut-sei=Deng en-aut-mei=Mingcong kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=InoueAkira en-aut-sei=Inoue en-aut-mei=Akira kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=IshikawaKazushi en-aut-sei=Ishikawa en-aut-mei=Kazushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=Nonlinear feedback control kn-keyword=Nonlinear feedback control en-keyword=operator kn-keyword=operator en-keyword=robust right coprime factorization kn-keyword=robust right coprime factorization en-keyword=tracking kn-keyword=tracking END