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Observer-based Robust H∞ Control for Uncertain Discrete-time Systems with Both State and Input Delays

Observer-based Robust H∞ Control for Uncertain Discrete-tim...

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第二十六届中国控制会议

作者： Bi Weiping1,Zhao Xiaoli1,Qi Chunling2 1.College of Mathematics and Information Science,Henan Normal University,Xinxiang 453007,P.R.china2.Department of Foundation,Sanmenxia Polytechnic,Sanmenxia 472000,P.R.china

This paper is concerned with the robustness and H∞ control problem of observer-based control for a class of uncertain linear discrete-time systems with both state and input *** no disturbance input,the asymptotic stabilization for uncertain time-delay systems will be *** Matrix Inequality（LMI）optimization approach is used to design the observer-based H∞ *** example illustrates the application of the proposed technique.

关键词： Discrete-time systems Observer-based control LMI Delay

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A Switched System Approach to Networked Control Systems with Time-Varying Delays

A Switched System Approach to Networked Control Systems with...

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第二十七届中国控制会议

作者： Zhang Wen’an,Yu Li,Song Hongbo Department of Automation,Zhejiang University of Technology,Hangzhou 310032,P.R.china

The stabilization problem is studied for the networked control systems with time-varying delay that is smaller than one sampling *** feedback controllers are considered and a new switched system model is proposed to describe the resulting closed-loop NCS as a discrete-time switched *** of exponential stability for the closed-loop NCS and design procedures for the stabilizing controllers are presented by using the average dwell time *** illustrative example is given to show the effectiveness of the proposed method.

关键词： Networked control systems Time-varying delays Switched systems Average dwell time

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RON,A New Method for Implementing Internet-Based Control Systems

RON,A New Method for Implementing Internet-Based Control Sys...

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第二十七届中国控制会议

作者： Sun Suhuan,Zhao Changwei School of Electronic and Information Engineering,Henan University of Science&Technology,Luoyang 471003,P.R.china

Against the problems existing in the Internet-based control systems,we propose a method for implementing such systems using RON *** is a virtual network constructed on the application-layer of the ISO-Internet *** it is able to select the optimum transmission strategy according to service quality factors,which will solve the problems caused by time-varying delay and minimum bandwidth guarantee in an Internet-based control system fairly *** simulation results show us that RON can be used as one of the ideal technologies to implement such an Internet-based control system.

关键词： RON Internet-based control system QoS

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Treatment of acne scarring with fractional laser

Treatment of acne scarring with fractional laser

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美丽人生和谐世界——中华医学会第七次全国医学美学与美容学术年会、中华医学会医学美学与美容学分会20周年庆典暨第三届两岸四地美容医学学术论坛

作者： Hui Qian Zhong Lu Huilin Ding Shuxian Yan and Leihong Xiang (Department of Dermatology,Huashan Hospital,Fudan University,Shanghai 200040,china)

Background and objective Effective treatment of facial acne scarring presents a common skin cosmetic *** CO laser based on the theory of fractional photothermolysis is used to heat the dermis selectively and treats acne scars in a less invasive *** this clinical study,the safety and efficacy of a novel fracional CO laser were investigated for the treatment of facial atrophic acne *** and methods 137 patients（78 female,59 male,Fitzpatrick skin phototypesⅢ-Ⅳ） with mild to severe facial acne scarring received three sequential fractional treatments（laser parameters:150 -200mJ fluence,1.2 -mm spot size,30 - 50Hz pulse rate,1 pass per treatment area）.Outcome measures included blinded evaluation of before and after photographs by two physician at months 3,6,and *** photographs were taken and side events and global improvement were *** Acne scarring improved well in 54.74%of the all patients completing the study.16.79%patients have an excellent *** evaluation results at 12 -month follow -up visit was significantly better than 3 - month.26 patients experienced posttreatment transient PIH and prolonged erythema respectively. There was no hypopigmentation or worsening scarring seen in any *** Our findings support the use of a high - energy pulsed and coolscanned CO laser as a safe,effective treatment for facial atrophic acne *** improvement was noted in most treated patients with minimal discomfort and short downtime. This protocol appears to be most effective at reducing scarring depth and softening scars *** may be better posttreatment improvement with more observation time.

关键词： fractional photothermolysis CO2 laser acne scarring

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Modeling and Simulation of Robot Based on Matlab/SimMechanics

Modeling and Simulation of Robot Based on Matlab/SimMechanic...

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第二十七届中国控制会议

作者： Yuan Shaoqiang,Liu Zhong,Li Xingshan School of Automation Science and Electrical Engineering,BeiHang University,Beijing 100083,P.R.china

In recent years,studies about control methods for complex machines and robots have been developed *** robots are often treated as inverted pendulums for its simple *** modeling of robot and other complex machines is a time-consuming procedure.A new method of modeling and simulation of robot based on SimMechanics is proposed in this *** modeling,parameter setting and simulation are presented in *** SimMechanics block model is first used in modeling and simulation of inverted *** results of the SimMechanics block model and mathematical model for single inverted pendulum are ***,a full state feedback controller is designed to satisfy the performance *** indicates that SimMechanics can be used for unstable nonlinear system and robots.

关键词： SimMechanics Inverted pendulum Simulation Modeling

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Direct Torque Control of Permanent Magnet Synchronous Motor

Direct Torque Control of Permanent Magnet Synchronous Motor

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第二十九届中国控制会议

作者： ZHANG Tao,LIU Baolian,ZHANG Huiping Faculty of Electronic and Electrical Engineering,Huaiyin Institute of Technology,Huaian 223003,P,R.china

Direct torque control（DTC）is a method to control motor with utilizing torque and *** the torque and current ripples are occurred in the conventional *** of undesired torque and current ripples is low number of voltage vectors applied to the motor controlled by the conventional DTC *** this paper,DTC of the PMSM has been *** stator flux and voltage space vectors are studied and the simulation of the DTC is *** on the analysis of basic DTC of permanent magnet synchronous motor（PMSM）,a new DTC technology based on flux error vector（FEV-DTC）is proposed to reduce torque and flux ripples in this *** and experimental results from the conventional DTC and FEV-DTC are presented and *** shows that the torque and flux ripples are decreased in new DTC.

关键词： Direct Torque Control Stator Space Vectors Permanent Magnet Synchronous Motor

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Genetic Algorithm Optimizer for Blend Planning

Genetic Algorithm Optimizer for Blend Planning

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第二十七届中国控制会议

作者： Zhao Xiaoqiang,Liu Weirong,Wang Jun College of electrical and information engineering,Lanzhou University of Technology,Lanzhou 730050,P.R.china

Process plant operations planning optimization is a difficult real life problem because it is non-linear,and mixes continuous and discrete *** mixed variable problems can’t be handled by conventional mathematical optimization techniques without a great deal of effort and operations research *** Algorithms（GA） is a popular artificial intelligence based optimization *** is easy to use,handles mixed integers,strongly non-linear problems,and quickly finds the global optimum of a *** the GA optimizer can solve blend planning problem with non-linear.

关键词： Blend planning Genetic algorithm Optimizer

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RESEARCH ON HEAT TRANSFER ENHANCEMENT OF EVAPORATOR DUE TO FROSTING IN AIR-SOURCE HEAT PUMP DURING THE INITIAL STAGE OF FROSTING

RESEARCH ON HEAT TRANSFER ENHANCEMENT OF EVAPORATOR DUE TO F...

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第四届压缩机与制冷国际会议

作者： Huang Xinwei Wang RuixiangDepartment of Urban ConstructiontBeijing Institute of Civil Engineering and Architecture No. 1 Zhanlan Guan Road Beijing 100044 Beijing china

＜正＞By analyzing the heat transfer characteristics oj jrosting, the model of computing heat transfer volume through the evaporator surface in air-source heat pump during the initial stage of frosting is set up. The increase ratio of heat transfer volume through the evaporator surface due to frosting is computed. And the critical point and its state parameters are found. So the frosting problem of the evaporator will be solved better bv controlling and utilizing the heat transfer enhancing of frost during the initial stage of frosting.

关键词： the initial stage of frosting sublimation latent heat heat transfer enhancement critical point

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Global Sliding Mode Control For Uncertain Linear Systems With State Time-Delays

Global Sliding Mode Control For Uncertain Linear Systems Wit...

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第二十九届中国控制会议

作者： LI Xiaoqian,JING Li,LIU Chang School of Mathematics and System Science,Shenyang Normal University,Shenyang 110034,P.R.china

The problem of designing global sliding mode controllers for a class of linear and uncertain systems with time delays of state was ***,A nonsingular linear transformation was *** original system with state time-delays was rewritten into a form without any time-delays by this nonsingular linear *** proposed a new method for integral sliding *** can make up for the deficiencies of the traditional sliding surface,eliminating the process of reaching and ensuring the global robustness of the ***,the sliding mode controller was designed based on the transformed *** ensures that all trajectories starting off the manifold reach it in finite time and have low chattering in the sliding motion.A sufficient asymptotic stability condition of the original system was ***,the efficiency and superiority of the proposed method were demonstrated by simulation study.

关键词： Sliding Mode Control Time-delay System Global Sliding Mode Asymptotically Stable Global Robustness Uncertain System and Integral Sliding Surface

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A Particle Swarm Optimization Based Satisfactory Bias-allowable Filtering

A Particle Swarm Optimization Based Satisfactory Bias-allowa...

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第二十九届中国控制会议

作者： QI Guoqing,LI Yinya,SHENG Andong Automatic School,Nanjing University of Science&Technology,Nanjing 210094,P.R.china

This paper investigates a low-order filter which admits the estimation output has as lower system bias as possible for maneuvering object tracking ***,the unknown maneuver of the target is decomposed into non-stochastic and stochastic ***,by assuming the intensity and duration of the unknown non-stochastic part are finite,the transfer function from the unknown maneuvering of the target to the estimation system bias is deduced by classical control ***,the relationship between dynamic bias coefficient and filter gain matrix is ***,the satisfactory bias-allowable filter is proposed by particle swarm optimization(PSO)method for the given order system,which can guarantee the dynamic bias coefficient as lower as possible under the constraints of regional pole index and error variance upper bound *** from H∞filter,the proposed filter considers the dynamic index of the estimation error,which makes it possible of using lower system model to track maneuvering object and can let the estimation output satisfy the satisfactory system error and stochastic error index ***,the effectiveness of the proposed bias-allowable filter is illustrated by a simulation example.

关键词： Bias-allowable Filter Dynamic Error Coefficient Particle Swarm Optimization Multi Indices Constraint

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