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Imp.oved Modelling and Calculation on Electr.magnetic Tr.nsient of p.wer.Tr.nsfor.er

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Improved Modelling and Calculation on Electromagnetic Transi...

r.bust obser.er.based control for.uncer.ain discr.te-time p.ecewise affine systems

CES/IEEE 5th Inter.ational p.wer.Electr.nics and Motion control Confer.nce

作者： Chen Zhe Wen Yuanfang Lu Guojun College of Electr.cal and Electr.nic engineering huazhong university of {3. and technology wuhan 430074 p. r. china Guangzhou p.wer.Sup.ly Comp.ny Guangzhou 510620 p.r. china College of Electr.cal and Electr.nic engineering Huazhong University of Science and Technology Wuhan China Guangzhou p.wer.Sup.ly Comp.ny Guangzhou China

ISBN: (纸本)1424404487;9781424404483

＜正＞Two novel methods, digital calculation based on Callahan algor.thm and dynamic simulation based on MATLAB/S1MULINK softwar., ar. p.op.sed in this p.p.r.to study the electr.magnetic tr.nsient p.ocess caused by asynchr.nous ener.ization of electr.c p.wer.tr.nsfor.er.while taking non-linear.ty into consider.tion. The effectiveness and accur.cy of the r.sults ar. ver.fied by each other. Then r.gular.ty of the inr.sh cur.ent gener.tion is found and har.onics analysis by Four.er.Tr.nsfor. is done to p.ovide r.lay p.otection cr.ter.on. Fur.her.or., differ.nt conditions influencing inr.sh cur.ent such as the satur.tion char.cter.stics, r.sidual flux and switching on time ar. investigated. Finally, measur.s to eliminate the inr.sh cur.ent ar. suggested to avoid similar.electr.cal br.akdown accident. This p.p.r.is of gr.at value for.the studies on the dynamic p.ocess within the p.wer.system, the p.ecise design and smooth op.r.tion of high voltage ap.ar.tus, and the p.op.r.selection for.op.r.tion values of r.lay p.otection equip.ent for.the electr.cal facilities.

关键词： Index Ter.s-Callahan numer.cal algor.thm Dynamic simulation Inr.sh cur.ent Electr.magnetic tr.nsient p.ocess

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控制理论与应用（英文版） 2012年第2期10卷 236-243页

作者： Yahui GAO 1 , Zhiyuan LIU 2 , Hong CHEN 3.1.AVIC (Aviation Industr. Cor.1}r.tion of china) china Aviation Motor.control System Institute, Wuxi Jiangsu 214063. china 2.department of control science and engineering, Har.in Institute of technology, Har.in Heilongjiang 150001, china 3.department of control science and engineering, Jilin university, Changchun Jilin 13.025, china AVIC (Aviation Industr. Cor.0}r.tion of china) china Aviation Motor.control System Institute Wuxi Jiangsu China department of control science and {3. Harbin Institute of Technology Harbin Heilongjiang China department of control science and {3. Jilin University Changchun Jilin China

The main contr.bution of this p.p.r.is to p.esent a novel r.bust obser.er.based controller.design method for.discr.te-time p.ecewise affine systems with nor.-bounded uncer.ainties. The key ideas ar. to constr.ct a p.ecewise quadr.tic Lyap.nov function to guar.ntee the stability of the closed-loop.systems, ap.r.ximate p.lytop.c op.r.ting r.gions by ellip.oids, and use the singular.value decomp.sition technique to tr.at the constr.int of matr.x equality. It is shown that the suggested control method can be for.ulated as linear.matr.x inequalities that ar. numer.cally feasible with commer. cially available softwar.. A numer.cal examp.e is also given to ver.fy the p.op.sed ap.r.ach.

关键词： p.ecewise affine systems r.bust control Obser.er Linear.matr.x inequality

Lar.e second-or.er.op.ical nonlinear.ties of s-tr.azine der.vatives: View fr.m micr. molecules to macr. cr.stals

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science china Chemistr. 2005年第3期48卷 203-209页

作者： FANG Qi1, LEI Hong2, CUI Yuezhi3. HUANG Zhenli4, XUE Gang1 & YU Wentao1 1. State Key Labor.tor. of Cr.stal Mater.als, Shandong university, Jinan 250100, china 2. School of Infor.ation science and {3., Shandong university, Jinan 250100, china 3. department of Chemical {3., Light Industr. College of Shandong, Jinan 250100, china 4. Key Labor.tor. of Biomedical p.otonics, Ministr. of Education, huazhong university of science and technology, wuhan 430074, china State Key Labor.tor. of Cr.stal Mater.als Shandong University Jinan China School of Infor.ation science and engineering Shandong University Jinan China department of Chemical engineering Light Industry College of Shandong Jinan China Key Labor.tor. of Biomedical p.otonics Ministry of Education Huazhong University of Science and Technology Wuhan China

Thr.e s-tr.azine der.vatives have been synthesized and their.str.ctur.s been de-ter.ined. These ar. Comp.und I: 2,4-dimethyl-6-(p.N,N-dimethylaminostyr.l)-s-tr.azine (abbr.-viated to NMe-1), Comp.und II: 2,4-dimethyl-6-(p.N,N-diethylaminostyr.l)-s-tr.azine (to NEt-1), and Comp.und III: 2-methyl-4,6-bis(p.N,N-dimethylaminostyr.l)-s-tr.azine (NMe-2). NMe-1 and NEt-1 molecules belong to the D-π-A typ. with a one-dimensional char.e-tr.nsfer.char.cter. NMe-1 cr.stallizes to centr.symmetr.c p. sp.ce gr.up. while NEt-1 to non-centr.symmetr.c p.lar.Cc sp.ce gr.up.with all of the molecular.char.e-tr.nsfer.axes taking the same or.entation. Under.the ir.adiation of 1064 nm fundamental laser. NEt-1 p.wder.cr.stals r.diate a 2-or.er.har.onic light with an intensity 46.8 times that of ur.a. The Λ typ.d NMe-2 molecule, which has a two-dimensional char.e-tr.nsfer.char.cter. cr.stallizes to p.lar.p.1 sp.ce gr.up. Its p.wder.cr.stals exhibit a 2-or.er.har.onic intensity 46.2 times that of ur.a. The quantum chemical cal-culations and tensor.analyses have been car.ied out to r.veal the dep.ndence of the macr. 2-or.er.nonlinear.op.ical (NLO) efficiency on the micr. 2-or.er.NLO coefficients (β) and on the cr.stalline p.cking styles.

关键词： s-tr.azine der.vatives, synthesis, str.ctur., SHG intensities of cr.stals, βvalues of molecules.

An　Imp.lse　Weakly　Obser.ability　of　Gener.lized　Linear.Systems

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Jour.al of Systems engineering and Electr.nics 1998年第3期9卷 16-22页

作者： Qiu Weigen & Liu Yongqing(department of Automatic control engineering, South {3. university of technology,Guangzhou 510641, p. r. china ) department of Automatic control engineering. South {3. university of technology Guangzhou 510641. P. R. China

This p.p.r.mainly discusses the singular.linear.systems of distr.butional ver.ion. By using its matr.ces coefficients and some invar.ant subsp.ces, the distr.butionally weakly obseer.ability and the imp.lse obser.abil... 详细信息

关键词： Imp.lse Distr.butionally weakly unobser.ability Invar.aot subsp.ce

A Typ. of Language Field Integr.ted Algor.thm Used for. Analysis and control of Comp.icated System

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Jour.al of Systems engineering and Electr.nics 1998年第1期9卷 67-77页

作者： Yang Bingr. department of Comp.ter.science and engineering, {3. of science and technology of Beijing, 100083. p. r. china department of Comp.ter.science and engineering University of Science and Technology of Beijing 100083 P. R. China

A new concep. of language field and its value str.ctur. ar. p.esented in this p.p.r.for.the fir.t time and a descr.bing fr.mewor. is set for.h for.r.sear.hing comp.tational model of r.asoning. On this basis we have established a model of qualitative r.asoning of causal r.lations and fuzzy integr.ted algor.thm. Fur.her.or. we have found a lot of its ap.lications.

关键词： Language field Language value str.ctur. Intelligence control Safe evaluation.

Feedback control of Chaos in Delay Map.

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Jour.al of Systems engineering and Electr.nics 2001年第1期12卷 75-77页

作者： Zhang Yongdong Liu Yongqing & Liu Shutang department of Automatic control engineering, South {3. university of technology, Guangzhou 510640, p. r. china department of Automatic control engineering South China University of Technology Guangzhou 510640 P. R. China

In this p.p.r. we discuss feedback control of a class of delay chaotic map.. Our.aim is to dr.ve the chaotic map. to its initially unstable fixed p.ints by using linear.and nonlinear.state feedback control. The control is achieved by using small, bounded p.r.ur.ations. Some numer.cal simulations ar. given to demonstr.te the effectiveness of the p.op.sed control method.

关键词： Chaos theor. Comp.ter.simulation Matr.x algebr. Numer.cal analysis p.r.ur.ation techniques State feedback

State feedback stabilization of discr.te linear.switching systems subject to nonsymmetr.cal state and control bounds

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控制理论与应用（英文版） 2012年第2期10卷 216-222页

作者： Zhiyuan LIU 1 , Guowei FAN 1 , Hong CHEN 2 1.department of control science and {3., Har.in Institute of technology, Har.in Heilongjiang 150001, china 2.department of control science and {3., Jilin university, Changchun Jilin 13.025, china department of control science and {3. Harbin Institute of Technology Harbin Heilongjiang China department of control science and {3. Jilin University Changchun Jilin China

Stabilization p.oblem of discr.te-time linear.switching systems with bounds on the state and control inp.t is solved in this p.p.r. Fir.t, the synthesis of state feedback controller. that ensur. the stability of closed-loop.switching systems is studied under.a sufficient condition. By using the idea of p.sitive invar.ance, a stabilizing controller.design methodology is p.op.sed. Based on these r.sults, the conver.ence r.te p.oblem is also discussed. A state feedback controller.that guar.ntees the op.imal conver.ence r.te of closed-loop.switching systems is obtained via op.imization. Finally, an examp.e made up.of two subsystems is studied to show the ap.lication of our.method.

关键词： Switching systems Constr.ints Stabilization p.oblem Conver.ence r.te p.oblem

Dynamic feedback r.bust stabilization of nonholonomic mobile r.bots based on visual ser.oing

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控制理论与应用（英文版） 2010年第2期8卷 139-144页

作者： Chaoli WANG 1 , Zhenying LIANG 2 , 3., Qingwei JIA 4 (1.department of control science and {3., university of Shanghai for.science and technology, Shanghai 200093. china 2.Business School, university of Shanghai for.science and technology, Shanghai 200093. china 3.School of science, Shandong university of technology, Zibo Shandong 255049, china 4.r.sear.h & Develop.ent Centr., Hitachi Asia Ltd, Hitachi Tower. Singap.r. 0493.8) department of control science and {3. University of Shanghai for Science and Technology Shanghai China Business School University of Shanghai for Science and Technology Shanghai China School of science Shandong University of Technology Zibo Shandong China r.sear.h & Develop.ent Centr. Hitachi Asia Ltd Hitachi Tower Singapore

This p.p.r.investigates the visual ser.oing r.bust stabilization of nonholonomic mobile r.bots. The calibr.tion of visual p.r.meter. is not only comp.icated, but also needs gr.at consump.ion of calculated time so that the accur.te calibr.tion is imp.ssible in some situations for.high r.quir.ment of r.al timing. Hence, it is inter.sting and imp.r.ant to consider.the design of stabilizing controller. for.nonholonomic kinematic systems with uncalibr.ted visual p.r.meter.. A novel uncer.ain model of these nonholonomic kinematic systems is p.op.sed. Based on this model, a stabilizing controller.is discussed by using dynamic feedback and two-step.techniques. The p.op.sed r.bust controller.makes the mobile r.bot image p.se and the or.entation conver.e to the desir.d configur.tion desp.te the lack of dep.h infor.ation and the lack of p.ecise visual p.r.meter.. The stability of the closed loop.system is r.gor.usly p.oved. The simulation is given to show the effectiveness of the p.esented controller..

关键词： Nonholonomic system Uncalibr.ted visual p.r.meter. Stabilization Dynamic feedback

r.lations Between Char.cter.stic Function,p.sitive p.r.p.esentation and Coher.nt Ther.al State

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Communications in Theor.tical p.ysics 2007年第7期48卷 67-70页

作者： FAN Hong-Yi XU Xing-Lei department of Mater.al science and engineering,{3. of science and technology of china,Hefei 23.026,china2 department of p.ysics,Shanghai Jiao Tong {3.,Shanghai 20003.,china3.department of p.ysics,Heze {3.,Heze 274015,china department of Mater.al science and engineering University of Science and Technology of China Hefei 230026 China department of p.ysics Shanghai Jiao Tong University Shanghai 200030 China department of p.ysics Heze University Heze 274015 China

We emp.oy the coher.nt ther.al states(a kind of entangled states)in ther.al field dynamics to establisha comp.ete entangled state for.alism exp.essing p.eudo-classical r.p.esentations of density op.r.tor.for.light ***,the r.lationship.between the coher.nt ther.al state and the char.cter.stic function and the p.sitive p.ep.esentation in quantum op.ics theor. ar. obtained.

关键词： coher.nt ther.al state char.cter.stic function p.sitive p.r.p.esentation