DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Tahk, Min-Jea | - |
dc.contributor.advisor | 탁민제 | - |
dc.contributor.author | Sun, Byung-Chan | - |
dc.contributor.author | 선병찬 | - |
dc.date.accessioned | 2011-12-12T06:59:30Z | - |
dc.date.available | 2011-12-12T06:59:30Z | - |
dc.date.issued | 1997 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=128191&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/26230 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 항공우주공학과, 1997.8, [ viii, 125 p. ] | - |
dc.description.abstract | A new controller reduction scheme using a new set of similarity invariants is proposed for LQG controller. The new set of invariants is defined by modifying the existing ones with two real constants. A modified balanced realization is suggested as a basic algorithm. Through case studies according to the two real constants, it is shown that a reduced-order controller which has good performance can be obtained by appropriately selecting only one constant. Reasonable bound for the constant is also given. The stability and performance of the closed-loop system with the reduced-order controller obtained by the proposed method are investigated. Some examples show that the proposed method is very attractive in terms both of stability and of accuracy of the closed-loop approximation. The new LQG-controller reduction scheme is extended to general types of coprime factorization controller reduction problem : non-weighted coprime factor controller reduction, constant-weighted coprime factor controller reduction, stability-weighted coprime factor controller reduction, and robustness-preserving coprime factor controller reduction. For the robustness-preserving controller reduction, robust stability conditions of the closed-loop system with a reduced-order controller are newly derived. Through a example, it is shown that the proposed coprime factor controller reduction methods using the new set of invariants yield reduced-order controllers which have both good closed-loop stability and good robustness. For general robustness problems, the relations between coprime factor perturbation and general types of structural perturbations are also derived. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Robust stability condition | - |
dc.subject | Frequency-weighted controller reduction | - |
dc.subject | Similarity invariants | - |
dc.subject | Coprime factor controller reduction | - |
dc.subject | Robustness-preserving controller reduction | - |
dc.subject | 강인성 보존 제어기 축소 | - |
dc.subject | 강인안정성 조건 | - |
dc.subject | 주파수 가중 제어기 축소 | - |
dc.subject | 유사변환 불변항 | - |
dc.subject | 소인수분해 제어기 축소 | - |
dc.title | Coprime factorization controller reduction using a new set of invariants | - |
dc.title.alternative | 새로운 불변항을 이용한 소인수분해 제어기 축소 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 128191/325007 | - |
dc.description.department | 한국과학기술원 : 항공우주공학과, | - |
dc.identifier.uid | 000935184 | - |
dc.contributor.localauthor | Tahk, Min-Jea | - |
dc.contributor.localauthor | 탁민제 | - |
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