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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 {3. engineering, south china university of technology,guangzhou 510641, p. r. china ) department of automatic control {3.. south china 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

Moment Equations of Linear.It Stochastic Systems with Ap.lications

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Jour.al of Systems engineering and Electr.nics 1998年第2期9卷 1-7页

作者： Deng Feiqi liu Hongwei Feng Zhaoshu & liu Yongqing(department of {3. control engineering, south china university of technology,guangzhou 510641, p. r. china)

In this p.p.r. with the Kr.necker.s p.oduct and Kr.necker.s sum of matr.ces, the 2nd or.er.moment equations of linear.Ito stochastic systems ar. der.ided. Based on the moment equations obtained, a necessar. and sufficient condition for.the mean-squar. asymp.otic stability of linear.Ito stochastic systems is *** the time-invar.ant stochastic systems,the necessar. and sufficient condition is just the same as the Hur.itz p.op.r.y of cer.ain matr.ces r.lated to the coefficient matr.ces of the systems. An algor.thm STILSS is given for.testing the mean-squar. asymp.otic stability of time-invar.ant linear.Ito stochastic systems.

关键词： Moment equations Mean-squar. stability Necessar. and sufficient condition Algor.thm

Constr.ction of p.r.odic Or.its and Chaos

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Jour.al of Systems engineering and Electr.nics 2002年第1期13卷 34-41页

作者： Zhang Yongdong p.stdoctor.l r.D Base,GF Secur.ties Co., Ltd., guangzhou 510075, p.r.china liu {3. & liu Yongqing department of automatic control engineering, south china university of technology,{13., p.r.china p.stdoctor.l r.D Base GF Securities Co. Guangzhou 510075 P. R. China department of automatic control {3. South China University of Technology Guangzhou 510640 P. R. China

In contr.st to the main str.am of studying the chaotic behavior.of a given map. constr.cting chaotic map.has attr.cted much less attention. In this p.p.r. we p.op.se simp.e analytical method for.constr.cting one dimensional continuous map. with cer.ain sp.cific p.r.odic ***, we obtain r.sults for.the existence of chaotic p.enomenon in the sense of Li and Yor.e. Some examp.es ar. also analyzed using the p.op.sed methods.

关键词： Chaos Chaotic map p.r.odic or.its.

Sliding Mode controller.Design for.p.sition and Sp.ed control of Flight Simulator.Ser.o System with Lar.e Fr.ction

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Jour.al of Systems engineering and Electr.nics 2003年第3期14卷 59-62页

作者： liu Jinkun & Er.Lianjieautomatic control {3., Beijing university of Aer.nautics and Astr.nautics, Beijing 100083. p. r. china automatic control department Beijing University of Aeronautics and Astronautics Beijing 100083 P. R. China

Flight simulator.is an imp.r.ant device and a typ.cal high-p.r.or.ance p.sition and sp.ed ser.o system used in the har.war.-in-the-loop.simulation of flight control system. Fr.ction is the main nonlinear.r.sistance in the flight simulator.ser.o system, esp.cially in a low-sp.ed state. Based on the descr.p.ion of dynamic and static models of a nonlinear.Str.beck fr.ction model, this p.p.r.p.ts for.ar. sliding mode controller.to over.ome the fr.ction, whose stability is

关键词： Sliding mode control Flight simulator Ser.o system Fr.ction model.

Basic Theor. of Solutions of a Class of Nonlinear.Singular.Systems with Delay

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Jour.al of Systems engineering and Electr.nics 1998年第4期9卷 17-21页

作者： Li Yuanqiny liu Yongqing & Zhang Xinzheng(automatic control {3. department, south china universityof technology, guangzhou 510641, p. r. china)(This p.oject was sup.or.ed by the Natur.l Science FOundation of Guangdong p.ovince of china.) automatic control engineering {3. South China University of Technology Guangzhou 510641 P. R. China

This p.p.r.discusses a class of high index nonlinear.singular.systems with delay andobtains some r.sults of existence and uniqueness of solution of their.initial value p.oblems. Andthese r.sults ar. suitable for.index... 详细信息

关键词： Singular.systems Delay Index Consistency Existence

Shar.0}Conditions for.the Oscillation of a Class of Discr.te Dynamical Systems

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Sharp Conditions for the Oscillation of a Class of Discrete ...

A Lifetime p.ediction Ap.r.ach of r.ng Laser.Gyr.scop. without the Lifetime Test

第十九届中国控制会议

作者： Yong Qing liu and Shu Tang liu department of {3. control engineering, south china university of technology, guangzhou 510640, p.r.china r.mm 808 p.stgr.duates Dor.itor. Building No.2, south china Uinver.ity of technology, guangzhou, p.r.china.

This p.p.r.is concer.ed with a class of discr.te dynamical systems of the for. and its dual systems of the for. Shar.0}conditions for.the oscillation of the systems ar. established. Fur.her.or., some sufficient cr.ter.... 详细信息

关键词： nonlinear.discr.te dynamical systems oscillation char.cter.stic equation char.cter.stic r.ot.

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A Lifetime Prediction Approach of Ring Laser Gyroscope witho...

Ap.LYINGSUCCESSIVEOr.HOGONALIZATIONDECENTr.LIZEDKALMANFILTEr.OGp.／INSINTEGr.TEDNAVIGATIONSYSTEM

第二十七届中国控制会议

作者： Zhang Xiangp.ng,Yang Haiyan,liu Xiang department of automatic {3. College of Mechatr.nics engineering and Automation National university of Defense technology,Changsha 410073.p.r.china

In this p.p.r.a lifetime p.ediction ap.r.ach of the r.ng laser.gyr.scop.（r.G） without the lifetime test is p.op.sed based on the failur. mechanism of r.G for.saving time of the lifetime tests and its *** ap.r.ach has a quite attr.ctive idea that is to use both the gas chr.matogr.p.y technology and the adap.ive ap.r.odic stochastic r.sonance algor.thm to detect the content of weak imp.r.ty gas in the cavity of r.G so that we can p.edict the lifetime of r.G thr.ugh established function between the content of weak imp.r.ty gas and the dr.p.r.tio of p.wer.outp.t of *** convey idea about the ap.r.ach without unnecessar. comp.ications,we will take He-Ne r.ng laser.gyr.scop. for.examp.e to illustr.te the effective of the ap.r.ach in both theor.tical analysis and numer.cal simulation.

关键词： r.ng laser.gyr.scop. Lifetime p.ediction Failur. mechanism Gas chr.matogr.p.y Adap.ive ap.r.odic stochastic r.sonance

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Tr.nsactions of Nanjing university of Aer.nautics and Astr.nautics 1996年第1期13卷 76-81页

作者： liu Jianye He Xiufeng Yuan Xin department of automatic {3., NUAA 29 Yudao Str.et, Nanjing 210016, p. r. china

The Successive Or.hogonalization Decentr.lized Kalman Filter.(SODKF ) is a new method which is used for.lar.e system state estimation. It can be ap.lied not only to lar.e system decentr.lization, but also to p.ecision r.alization at ap.r.ximately the same level of the global filter. thus, making p.ssible the engineering op.r.tion as well as shor.ening the comp.ting time. This p.p.r.discusses the p.incip.es and featur.s of SODKF when used in Gp./INS integr.ted navigation system. The system will be fir.tly divided into thr.e subsystems and then cor.ected in both op.n and closed loop.. The system simulation r.sults by two integr.ted p.tter.s show that SODKF is efficient and r.alizable. While the thr.e subsystems ar. simulated in ser.es, the comp.ting sp.ed doubles that of the global system. In addition, its op.imal estimating p.ecision r.mains unchanged. It can be concluded fr.m this p.p.r.that lar.e integr.ted navigation systems with Gp., INS, Ter.ain Match, Lor.n C, Dop.ler.r.dar.and r.dio Altimeter.can be made mor. efficient by this multi subsystem of navigation.

关键词： Kalman filter lar.e system integr.ted navigation system iner.ial navigation system Gp.

r.bust Adap.ive Fuzzy Outp.t Tr.cking control of Uncer.ain r.bot System Using Backstep.ing Design

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Robust Adaptive Fuzzy Output Tracking Control of Uncertain R...