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Stabilization of an uncertain multiple-oscillator system

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Control Theory and Technology 2022年第3期20卷 361-370页

作者： huawen ye Chengkun Li Xianting Qi Jun Liu School of Automation Central South UniversityChangsha410083HunanChina

For a multiple-oscillator system that is subject to the uncertain gains ranging within compact sets,this paper presents a constructive stabilization *** by nested-saturation control methods,a nested controller that contains multiplicative coefficients is directly designed,and these coefficients are then determined in the stability *** skillfully making transformations,elaborately constructing Lyapunov functions,and using an M-matrix principle,the stability analysis leads to the explicit inequality condition that is expressed by directly using the system parameters.

关键词： Stabilization Uncertain multiple-oscillator systems M-matrix principle

New stabilization design for planar vertical take-off and landing aircrafts

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控制理论与应用（英文版） 2011年第2期9卷 195-202页

作者： ye, huawen Sheng, Liang Gui, Weihua Yang, Chunhua School of Information Science and Engineering Central South University Changsha Hunan 410083 China

This paper presents a new stabilizing control law for a planar vertical take-off and landing *** model is first transformed into an equivalent form,and then a control law consisting of a linear term and a saturated term is given for a related subsystem,with the saturation levels being assigned as large as *** to the existing saturation scheme in which all states are restricted by saturations,the design brings about a relatively fast *** effectiveness and advantage of the design are validated by numerical simulations.

关键词： Stabilization Planar vertical take-off and landing (PVTOL) Nonlinear control Saturated control

Further Result on Decentralized Stabilization via Saturated Delayed Feedback

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Further Result on Decentralized Stabilization via Saturated ...

第25届中国控制与决策会议

作者： Zhenhui WU huawen ye Weihua GUI Chunhua YANG School of Information Science and Engineering Central South University

ISBN: (纸本)9781467355339

This paper investigates the decentralized stabilization of large scale feedforward nonlinear systems via saturated delayed feedback. A class of saturated delayed controllers is first proposed for the single-input feedforward nonlinear systems: an appropriate normal form rather than the homogeneous property of feedforward systems is depended on, and a small parameter contained in the normal form is assigned into the control law. By tuning the small parameter, the control design allows an arbitrarily large input delay. This scheme is then extended to the setting of decentralized feedforward nonlinear systems. The effectiveness of the suggested algorithm is verified by simulations.

关键词： Decentralized stabilization saturated control time delays feedforward systems nonlinear systems.

Stabilization of the Overhead Crane System via Saturation Technique

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Stabilization of the Overhead Crane System via Saturation Te...

第40届中国控制会议

作者： Xianting Qi huawen ye Chengkun Li School of Automation Central South University

In this paper, a nested-saturation controller is provided to stabilize the overhead crane system. We transform the overhead crane system into an uncertain nonlinear feed-forward system that is subject to a linear perturbation. Moreover, we designedly view some terms as uncertain multiplicative coefficients. Due to the observation that the bounds of uncertain coefficients can be obtained in the bottom-up recursive analysis, we have no need to treat a second-order subsystem in advance,and design a real bounded control law: a fully-saturated controller. Hopefully, the method in this paper may motivate new stabilizing designs for other under-actuated systems.

关键词： Stabilization the overhead crane system saturated control uncertain nonlinear systems

Saturated Controls for a PVTOL Aircraft and an Inertia Wheel Pendulum via a New Transformation

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Saturated Controls for a PVTOL Aircraft and an Inertia Wheel...

第43届中国控制会议

作者： Zilong Chen Jun Liu huawen ye School of Automation Central South University

This paper presents saturation stabilization designs for a PVTOL aircraft and an inertia wheel pendulum employing a new transformation. With a coordinate transformation derived from the controllable matrix theory,the M-matrix theory allows us to directly determine the asymptotic stability of the reduced system that no longer contains saturation. Namely,without the need to construct Lyapunov functions,we can determine asymptotic stability by using row-diagonally dominant estimates. Also,the new treating method allows to provide a relatively optimal assignment of controller parameters in the sense that a relatively fast convergence can be guaranteed. Hopefully,the method in this paper may motivate new stabilizing designs for other complex physical systems.

关键词： Saturated Control New Transformation Helicopter Control The Inertia Wheel Pendulum System

Ge-rich hydrothermal solutions and abnormal enrichment of Ge in coal

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Chinese Science Bulletin 1999年第S2期44卷 257-258页

作者： HU Ruizhong, BI Xianwu, SU Wenchao, QI huawen and ye Zaojun Intitue of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

AT present, the main source of germanium includes two types of ore deposits: some sulfide-rich Pb, Zn,Cu, Ag and An deposits and some coal deposits. Germanium occurs as an associated element in these oredeposits. The Lincang germanium deposit discovered recently in China occurs in a basin where there areexposed the Neogene coal-bearing clastic rocks with Indosinian Ge-rich (（1.9-5.0）×10-6) granitesas the basement in Lincang County, Yunnan Province. Germanium is mainly concentrated in the coalseams of the first coal-bearing horizon (Nth2) and in regard to its grade (normally n×100×10-6 with themaximum over 1000×10-6) and scale （the proven reserve about 800 t）, no such germanium mineralization has been reported so far in other parts of the world. What is the reason? The available studies have indicated that this germanium deposit is of epigenetic origin, whichdetermines that germanium must have been transferred into coal with the help of a kind of medium. It isnoticed that （i） organic germanium in natural waters is stable and it is never involved in its

关键词： coal. abnormal enrichment of germanium Ge-rich hydrothermal solution.

Geochemistry of siliceous rocks and germanium mineralization of Lincang superlarge germanium deposit in Yunnan Province

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Chinese Science Bulletin 1999年第S2期44卷 156-157页

作者： SU Wenchao, HU Ruizhong, QI huawen and ye Zaojun Open Laboraory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Open Laboraory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

GERMANIUM, as a dispersed element, is highly dispersed in the crust and any independent deposit of ithas never been reported. It has long been obtained as a byproduct from some sulfide-rich deposits andcoal beds. The Lincang germanium deposit discovered in recent years in China can be considered as an independent germanium deposit of superlarge reserves. At present, about 800 t of germanium reserves havebeen exploited, the most part of which is concentrated in the first cycle of coal at the bottom of the basindeveloped on a granite basement, while the upper three coal cycles are basically barren. Bodies of Gemineralization exhibit a zonal pattern trending NNW, in consistence with the distribution of the siliceousrocks in the first coal cycle. Here we describe the geochemical characteristics of the siliceous rocks intercalated with the first

关键词： germanium mineralization siliceous rocks Lincang superlarge germanium depeosit Yunnan.

Research on Fire Engine Dispatching Problem Based on Improved Auction Algorithm

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Research on Fire Engine Dispatching Problem Based on Improve...

第37届中国控制会议

作者： Ning Yang huawen ye Zhifeng Qiu Yan Li Weihua Gui School of Information Science and Engineering Central South University

This paper addresses the dispatch problem of fire engines in the event of multiple fires. In view of the rapid change of fire status with time, the time-varying function is used to describe the change of fire status. Then we can treat the fire dispatch problem as a dynamic task allocation problem. Firstly, based on the centralized idea, the depth-first algorithm is used to solve the multi-task assignment problem. Secondly, through this centralized algorithm example simulation, we proposed multi-stage task allocation strategy and designed a new revenue function to improve the auction algorithm. Finally, the effectiveness of the improved auction algorithm is verified by the example simulation.

关键词： Fire engine dispatching depth-first algorithm auction algorithm

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一类互联系统的局部输入状态镇定

西北工业大学学报 2005年第1期23卷 36-39页

作者：叶华文戴冠中康剑灵西北工业大学自动控制系陕西西安710072 东华大学应用数学系上海200051

针对由局部输入状态可镇定和输入状态稳定的两个子系统组成的前馈系统 ,设计饱和控制达到局部输入状态镇定的目的 ,即相应的闭环为输入受限的输入状态稳定。首先研究其中一个子系统的局部输入状态镇定问题 ,获得输入状态间的增益 ,然后... 详细信息

针对由局部输入状态可镇定和输入状态稳定的两个子系统组成的前馈系统 ,设计饱和控制达到局部输入状态镇定的目的 ,即相应的闭环为输入受限的输入状态稳定。首先研究其中一个子系统的局部输入状态镇定问题 ,获得输入状态间的增益 ,然后基于一定的增益条件 ,运用小增益原理循序确定饱和控制的饱和度 ,得到前馈系统的简单鲁棒控制律。作为验证 ,设计一个低维前馈模型的饱和控制。

关键词：输入状态稳定局部输入状态稳定小增益原理饱和控制