Vibration control of a vehicle’s seat suspension featuring a magnetorheological damper based on a new adaptive fuzzy sliding-mode controller

Phu, Do Xuan,Choi, Seung-Bok,Lee, Yang-Sub,Han, Moon-Sihk Professional Engineering Publishing Ltd 2016 Proceedings of the Institution of Mechanical Engin Vol. No.

<P>This work presents a new design for adaptive fuzzy sliding-mode control based on two methodologies, namely H control and sliding-mode control, and its control effectiveness. This is achieved by implementing a control scheme for vibration control of a vehicle with a seat suspension on which a magnetorheological damper is installed. The sliding surface of sliding-mode control is analysed by separation into two matrices: a Hurwitz-constants matrix and a constant matrix. These matrices are the basis for establishing the proposed control scheme combined with the H technique. The control scheme consisting of the combination of H control and sliding-mode control is reinforced by a new robustness function featuring an exponential function. In this work, a fuzzy logic model, which is well known to be an excellent model for uncertain dynamic systems, is integrated with the proposed control algorithm. The fuzzy logic model adopted in this work is an interval type-2 fuzzy model featuring fast computation of the output. The effectiveness of the proposed control scheme is evaluated through both computer simulations and experimental realization on a vehicle with a seat suspension which is equipped with a magnetorheological damper. In addition, in this work, two existing adaptive controllers are modified and implemented for comparative work with the proposed control scheme. It is shown that the proposed control scheme exhibits a much better vibration control performance than the two existing adaptive controllers do.</P>

독한사전 모델 개발 연구

양도원 한국독일어교육학회 1999 외국어로서의 독일어 Vol.5 No.-

Die vorliegende Arbeit ist zunachst ein Erfahrungsbericht, den ich in den letzten Jahren beim Verfassen eines deutsch-koreanischen Worterbuches gesammelt habe, und auch eine kritische Selbst-betrachtung, die ich im Laufe meeines neuen Kenntnisserwerbs uber die Lexikographie gewonnen habe. In der lexikographischen Geschichte stehen zwei Stellungen gegenuber, namlich die der Lexikographer bzw. der treibenden gesellschaftlichen Krafte und die der Benutzer. Um den ersten Umgang mit dem deutsch-koreanischen Worterbuch zu erleichtern, habe ich ein neues Worterbuchkonzept entworfen, das mit dem Prinzip "Benutzerfreundlichkeit” zu verzeichnen ist. Diese Besonderheiten sind sowohl bei der externen als auch internen Selektion der Lemmata zu erkennen. Nach der Auffassung des Verfassers soll ein Lernerworterbuch den Anfangern nicht nur linguistische, sondern auch kulturelle Kenntnisse und Inhalte vermitteln, damit sic durch verschiedene Sinneskanale konfrontiert werden sollen. Diese Auffassung wird mit wissenschaftlichen Ergebnissen ion anderen Disziplinen zusammengefasst begrundet. Es ist die weitere Aufgabe des Worterbuchverfassers, die Schwache und Unkorrektheit herauszufinden und sic zu beheben. Hiermit werden eine kritische Betrachtung und Verhesserongsvorschlage van Fachkollegen in jeder Form herzlich auf- und wahr-genommen.

B2B 환경 제조업의 공급업체에 대한 SCM 구축

양광모,류도희,박주식,강경식 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-

Today's environment of enterprise is changing. They have to face customers' demands with the right product, the right service and supply them at the right time. And also cut down logistics and inventory cost and bring up the profit as much as they can. This means the change of petting enterprise first in importance to putting customer first in importance. therefore to correspond to customer's demand, shorting lead time is becoming a essential condition. The answer to this changes of environment is supply chain management. In this study, we use Goldratt's drum-buffer-rope scheduling in between manufacturer and supplier. And when shortage of inventory occur, search for the supply chain's CCR. Pressing CCR leer more production, and supply inventory from logistic center to guide for inventory buffing. using logistic warehouse between manufacturer and supplier, can execute function of buffer.

독문학 교수법의 기초 이론 연구 : 엘러스의 이론을 중심으로

양도원 한국독일어교육학회 1996 외국어로서의 독일어 Vol.1 No.-

In dieser Arbeit wurde versucht, den Paradigmawechsel in den Leserkten zu beleuchten. Die Rezeptionsforschungen in der Literaturwissenschaft, die in den letzten 20 Jahren hervorgebracht wurden, beruhen vor allem auf den Grundlagen der Literatursoziologie, Hermeneutik und Literaturgeschichte. Das forderte auf, den Status des Lesers neu einzuordnen. Dabei wurde klar, deβder Leser eine neue Rolle ubernehmen muβ. M. Dahrendorf bezeichnete es als eine ?kopernikanische Wende" im Lesen, daβ sich der Leser aktiver mit dem Text auseinandersetzt. Das heiβt, der Leser liest und sieht una sieht den vorhandenen Text distanziert und interpretiert ihn nach seinem Geschmuak. Nach Seantje Ehlers ist Lesen eine Verstehenstatigkeit, die darauf zielt, sinnvolle Zusammenhange zu bilden. Auf der einen Seite wird sie von dem Text und seiner Struktur gesteuert, auf der anderen Seite von dem Leser, der sein Vorwissen, seine Erfahrung, seine Neigungen und sein Interesse an einen Text herantragt. Im laufe des Lesens entsteht ein Gesprach zwischen dem Text und dem Leser, das durch verschiedene Faktoren beeinfluβt wird. Diese Faktoren werden auf ihre lesedidaktische Bedeutung hin gepruft. Hier sind literarisch-asthetische Spielregeln und Techniken, die Konventionalisierung der literarische Strategien und Darstellungstechniken aufzudecken. Nach der Auffassung von S. Ehlers kann man Lesen und Verstehen lernen, die Texte selber zeigen dem Leser vielfaltige Wege des Verstehens und Deutens. Es gibt nicht eine Wahrheit, nicht eine Sichtweise und nicht eine Deutung. Un eine Wahrheit, eine Sichtwiese oder eine Deutung gewinnen zu konnen, muβ man imstande sein, sich partnerschaftlich mit dem Text zu unterhalten. Das ist gerade die Aufgabe des fremdsprachlichen Lesers.

循環 흐름을 가진 固定層 反應器의 不安定性에 관한 硏究

梁海永,韓道興,李明浩 嶺南大學校 工業技術硏究所 1993 工業技術硏究所論文集 Vol.21 No.1

In this study we observed the possible existence of multiple steady states for CO oxidation over Pt/Boehmite catalysts, which is one of instabilities, and also analyzed numerically these phenomena with some proper reactor models. The form of our reactor was a non-adiabatic fixed bed with recycle. The reactor models include both one phase model with plug flow and two phase model with heat transfer resistance between gas phase and solid one. Especially, it was attempted to explain the multiplicity features with a very wide region, whose features could not have been clearly explained by means of any other model, by the modified two phase model which includes a term related with memory effect of catalyst temperature. The experiments showed that the effect of recycle ratio on multiplicity region could not be revealed definitely for our experimental conditions. This may arise from the facts that the multiplicity for the CO oxidation over Pt/Boehmite cataysts resulted mainly from strong heat transfer limitation rather than from mixing effect related with recycle flow since the CO oxidation was a reaction with both very high generation and rapid reaction rate.

CO 산화반응에서 지속진동에 관한 연구

양해영,한도흥,하병환 嶺南大學校 工業技術硏究所 1994 工業技術硏究所論文集 Vol.22 No.2

Sustained oscillation, including a constant amplitude of less than 10℃ in temperature and a short period between several seconds and several minutes, was experimentally found in the CO oxidation over fixed bed of platinium/γ-alumina catalysts. From this study, it was believed that the oscillation could occur within the kinetic region in exclusion of heat transfer limitation. On the other hand, under some more strong heat transfer limitation,the temperature-oscillation had a long period of several ten minutes and two types of concentration-oscillation, which periods were short and long, could simultaneously exist at one period. Finally, under a strong heat transfer limitation, the oscillation disappeared but rate-multiplicity phenomenon only appeared.

u-캠퍼스 지능형 정보 전달 서비스에 관한 고찰

한희도,이양민,이재기 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1

With the development of ICT(Information Communication Technology), these technologies have been utilized in education field broadly Recently, u-Campus that applies the ubiquitous computing and network technologies to campus is going to appear. In this paper, we propose a intelligent information delivery service that can provide new information to students in campus. Students In campus use all sorts of information, such as educational matters, employments, entering upon studies, etc. In the database at anytime and anywhere. Using the proposed service in this paper, students can do their campus life more efficiently and easily.

불응성 자가면역질환에서의 자가조혈모세포이식

민도준,양동원,민창기,김완욱,이상헌,박성환,김동욱,이종욱,조철수,민우성,김범생,김호연,김춘추 대한조혈모세포이식학회 2001 대한조혈모세포이식학회지 Vol.6 No.1

배경: 기존의 치료에 불응하고 예후가 불량한 자가면역질환 환자들에게 최근 고용량 면역억제 및 조혈모 세포이식이 새로운 치료방법으로 대두되고 있다. 저자들은 다발성 경화증(multiple sclerosis, MS) 및 류마티스 관절염(rheumatoid arthritis, RA) 등 2명의 자가면역질환 환자들에서 자가조혈모세포 이식을 시행하였다. 방법: 말초혈액 조혈모세포 가동화를 위하여 cyclophosphamide (4 g/㎡) 및 granulocyte colony stimulating factor (10 g/kg/day)를 투여하였고, CD34+ 세포를 분리·채집 하였다, 이식 전처치로 MS 환자에서 BEAM 및 antihymocyte globulin (ATG) (3.75 mg/kg), RA 환자에서 fludarabine (180 mg/㎡), ATG (10 mg/kg)와 busulfan (8 mg/kg)을 투여하였다. 결과: 호중구 수가 500/㎕ 이상으로 회복되는 기간은 MS 환자에서 9일, RA 환자에서 15일이었다. 혈소판이 20.000/㎕ 이상으로 회복되는 가간은 RA 환자에서 9일 이었고, MS 환자에서는 혈소판 감소증이 발생하지 않았다. 비혈액학적 독성으로 MS 환자에서 WHO 1도의 오심 및 점막염이 관찰되었다. MS 환자는 이식 6개월 후까지 시력감소가 남아있었으나, 이식전에 관찰되던 감각이상 및 운동장애 등의 신경학적 이상 소견은 더 이상 관찰되지 않았다. RA 환자는 이식 1개월 후 관절 증상 및 검사소견의 호전을 보였다. 결론: 불응성 자가면역질환 환자에서 고용량 면역억제 및 조혈모세포이식은 적은 독성으로 높은 치료효과를 기대할수 있으며, 향후 이 시술의 임상적 의의를 규명하기 위하여 전향적이고 장기적인 연구가 필요할 것으로 사료된다. Background: High-dose immunosuppressive therapy followed by autologous hemathpoietic stem cell transplantation (HSCT) has been proposed as a new approach to treat severe, refractory autoimmune diseases. We describe two patients with refractory autoimmune diseases (one multiple sclerosis 〔MS〕and one rheumatoid arthritis〔RA〕) who underwent T-cell-depleted autologous peripheral bleed stem cell transplantation for the first time in Korea. Methods: We mobilized autologous stem cells with cyclophisphamide (4 g/㎡) and granulocyte colony-stimulating factor (10 ㎍/kg/day). Stem cells were enriched ex vivo using CD34-positive immunoselection and reinfused after high-dose chemotherapy with BEAM and antithymocyte globulin (ATG) (3.75 mg/kg) in MS, or fludarabine (180 mg/㎡), ATG (10 mg/kg) and busulfan (8 mg/kg) in RA. Results: The engraftment with an absolute nerutrophil count greater than 500㎕ occurred on day 9 in MS and 15 in RA, respectively. The time to nontransfused platelet count greater than 2.000/㎕ was 9 day in RA. MS patient did not show ant episode of thrombocytopenia. Regimen-related non-hematopoietic toxicity was minimal. For 6 months since HSCT, them patient with MS had been free from previously existed sensory and motor abnormalities except decreased visual acuity. Then patient with RA and only one tender joint and two mildly swollen joints with improvement in laboratory parameters at one month after HSCT. Conclusion: These results underscore the feasibility and potential efficacy of intensive immunosuppression followed by autologous HSCT for treatment of intractable autoimmune diseases. The durability of remission, however, remains to be clarified.

고무인상채득시 지대치 충진재료와 표면처리법의 영향

정도진,양홍서,박상원 전남대학교 치과대학 2000 전남치대논문집 Vol.12 No.1

The purpose of this study is twofold. One is to evaluate the wettability of 4 elastomeric impression materials on tooth and different kinds of filling materials. The other is to identify the effect of topical surfactants sprayed on the surface of each impression. The elastomeric impression materials used in this experimental study were one polyether(Impregum F) and three polyvinyl siloxanes(Provil novo, Zerosil, Imprint). The abutments were prepared for 3/4 crown or onlay on the extracted human first molar. The filling materials used in this study for the duplication of prepared abutment were composite resin, amalgam, and casting metal. Impression was taken by manufacturer's recommendations and the number of voids on the impression surface was counted. The topical surfactants were Spannex Ⅱ?? and Cohere??. The wettability was evaluated by comparing the number of voids between non-treated group and treated groups. The results were as follows: 1. Zerosil?? showed the least number of voids on the impression surface. The number of voids increased in order of Provil novo??, Impregum F??, and Imprint??. 2. Impregum F?? and Zerosil?? showed the least number of voids on the surface of dental stone master cast. The number is increased in order of Provil novo?? and Imprint??. 3. When abutment material is tooth, the number of voids on the surface of master cast was smallest compared with that of other abutment materials. The number of voids increased in order of casting metal, amalgam and composite resin. 4. The number of voids on the surface of the dental stone master cast was smallest when SpannexⅡ?? was used, followed by Cohere?? treated group and non-treated group. These results suggest that the difference in wettability caused by the types of rubber base impression materials as well as abutment materials can affect the number of voids. And the use of topical surfactant for rubber base impression materials can improve the wettability of the materials and enhance the accurate master cast which has fewer surface voids.

Streptomyces exfoliatus가 생성하는 mutanase에 의한 인공치태 억제 작용

송도원,양규호 전남대학교 치과대학 1996 전남치대논문집 Vol.8 No.1

The main component of dental plaque is the mutan containing the α-1, 3 bond. The following results were obtained by using a blue mutan to assess the factors affecting the mutan-digesting activity of Streptomyces exfoliatus isolated from soil. A clear zone was produced by mutanase-producing Streptomyces exfoliatus on the minimal essential agar containing blue mutan. Streptomyces exfoliatus digested more blue mutan in the minimal essential broth at pH 7.0 than at pH 5.5 or 8.5. Streptomyces exfoliatus digested more blue mutan at 37℃ than at 32℃ or 42℃(P<0.05). When the concentration of CaCl_2 was increased in the minimal essential broth, the digestion of blue mutan was increased(P<0.05). The optimal concentration of KCl was 10mM to digest blue mutan, but a similar amount of blue mutan was digested at the range of 0.1mM to 6.4mM of MgCl_2. When the culture supernatant of Streptomyces exfoliatus was mixed with 2X brain heart infusion broth containing 0.5% yeast extract and 10% sucrose, less artificial plaque was formed by Streptococcus mutans on the orthodontic wire(P<0.05). These results indicated that the secretion of mutanase was identified in culture supernatant of mutan-digesting Streptomyces exfoliatus, suppressing the formation of artificial plaque by Streptococcus mutans.