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THE self-stable REGION APPROACH FOR SECOND ORDER SYSTEMS

Systems Science and Mathematical Sciences 1999年第3期12卷 238-245页

作者： HUANG Yi HAN Jingqing(Institute of Systems Science, Academia Sinica, Beijing 100080, China) 中科院系统科学所北京 100080 中科院系统科学所北京

In this paper, an inherent property that second order systems, which can bestable, have the self-stable Regions (SSRs) is proposed. Based on this property, a newsynthesis method-the self--stable Region approach is suggested for a class of second-ordernonlinear uncertain systems. The global stability of the closed-loop systems is ***, the advantages of the SSR approach are analyzed.

关键词： Nonlinear uncertain systems synthesis method the self-stable Region(SSR)

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Analysis and design for the second order nonlinear continuous extended states observer

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Chinese Science Bulletin 2000年第21期45卷 1938-1944页

作者： Yi Huang Jingqing Han Chinese Acad Sci Acad Math & Syst Sci Inst Syst Sci Beijing 100080 Peoples R China

The extended state observer (ESO) is a novel observer for a class of uncertain systems. Since ESO adopts the continuous non-smooth structure, the classical observer design theory is hard to use for ESO analysis. In this note, the self-stable region (SSR) approach, which is a nonlinear synthesis method for nonlinear uncertain systems, will be used for ESO design and its stability analysis. The advantages of the non-smooth structure in ESO for improving the convergence properties and the estimation precision will be shown.

关键词： extended state observer (ESO) continuous non-smooth structure self-stable region (SSR) method.

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Vertical Dynamic Stability Analysis of EDS Levitation Systems Based on Halbach Magnet Arrays

Vertical Dynamic Stability Analysis of EDS Levitation System...

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2009中国控制与决策会议

作者： Cheng Yuwei,He Guang,Long Zhiqiang Engineering Research Center of Maglev Technology,National University of Defense and Technology,Changsha Hunan 410073

＜正＞The paper deals with the dynamic characteristics of the EDS levitation systems based on Halbach *** is well known that the EDS levitation systems are self-stable,but for a successful commercial application,a good dynamic character must be *** EDS levitation systems based on Halbach arrays are showing a promising future,and some maglev trains as well as other applications on military usage have already gained lots of useful *** this paper, the vertical dynamic stability is analyzed with a conclusion that the EDS system based on Halbach magnet arrays is under-damped with a persistent *** a result,some supplement damping measures should be applied.A comparison of different kinds of damping measures is *** the end,a model based on the magnetic compensation damping is built and the simulation results showed an agreeable character of this measure.

关键词： Halbach Magnet Array EDS Damping self-stable Stability

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