ROBUST CONTROL WITH COVARIANCE CONSTRAINT FOR UNCERTAIN SAMPLED DATA FEEDBACK CONTROL SYSTEMS

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ROBUST DISSIPATIVE CONTROL FOR STATE-DELAYED SYSTEMS WITH DISSIPATIVE UNCERTAINTY

Introduction　　Since notion of a dissipative dynamical systemwas introduced by Willems[1] ,it has played a veryimportant role in system,circuit,network andcontrol engineering and theory.Dissipativeness isa generalization of the passivity in electrical net-works and other dynamical systems which dissipateenergy in some abstractsense.Applications of dis-sipativeness in the stability analysis of linear sys-tems with certain nonlinearfeedback were firstdis-cussed in Refs.[1 ,2 ]. The theory of d…     

ROBUST FILTERS WITH SAMPLED DATA ESTIMATION COVARANCE CONSTRAINT FOR UNCERTAIN CONTINUOUS TIME SYSTEMS

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｉｍｐｏｒｔａｎｃｅｏｆｓａｍｐｌｅｄ－ｄａｔａｅｓｔｉｍａｔｉｏｎｏｒｆｉｌｔｅｒｉｎｇｉｓｉｎｃｒｅａｓｉｎｇｂｅｃａｕｓｅｏｆｔｈｅｒａｐｉｄｄｅｖｅｌ－ｏｐｍｅｎｔｉｎｔｈｅｔｅｃｈｎｏｌｏｇｙｏｆｄｉｇｉｔａｌ...     

DISCRETE VARIABLE STRUCTURE CONTROL OF LINEAR TIME-INVARIANT SYSTEMS WITH TIME DELAY

IntroductionIn recentyears,many methods have been pro-posed for the design of time- delay control sys-tems[1,2 ] and criteria for the stability of time- delaysystems have been developed by many re-searchers[3 ,4] .Time delay in the control systemscan be divided into two classes on the whole.Oneis in measurement of system variables and calcula-tion for required control force,including physicalproperties of equipmentused in the systems or sig-nal transmission.The other is in control for actua-to…     

DEADBEAT COVARIANCE CONTROLLER DESIGN FOR SAMPLED-DATA SYSTEMS

ＭＰＬＥＤ－ＤＡＴＡ ＳＹＳＴＥＭＳTX＠霍沛军＠王子栋ＩｎｔｒｏｄｕｃｔｉｏｎＳａｍｐｌｅｄ－ｄａｔａｆｅｅｄｂａｃｋｃｏｎｔｒｏｌｈａｓｒｅｃｅｉｖｅｄｍｕｃｈａｔｅｎｔｉｏｎｉｎｔｈｅａｒｅａｏｆｃｏｎｔｒｏｌｓｙｓｔｅｍｄｅ－ｓｉｇｎｂｅｃａｕｓｅｏ...     

不确定时变时滞系统的指数稳定鲁棒H_∞可靠控制

针对一类含有时变时滞的参数不确定线性系统,研究了在执行器发生故障情况下系统指数稳定的鲁棒H∞可靠控制器设计问题.根据Lyapunov稳定性理论,给出了系统存在指数稳定鲁棒可靠控制器应满足的一个矩阵不等式;同时给出了系统具有H∞性能指标应满足的另一个矩阵不等式.论文将这两个矩阵不等式转化为两个线性矩阵不等式（LMIs）.利用论文方法设计的指数稳定鲁棒H∞可靠控制器能够使得时滞系统对于任意允许的不确定性以及任意执行器失效都保持鲁棒可靠指数稳定,并且使系统具有指定H∞范数的干扰抑制能力.仿真结果表明了该控制器设计方法的有效性.     

模糊广义系统的静态输出反馈控制

分析模糊广义系统的稳定性,利用模糊Lyapunov泛函方法,给出了一类T-S模糊广义系统的容许性条件,并利用静态输出反馈对该系统进行控制,通过求解严格的线性矩阵不等式,得到模糊广义系统可以通过输出反馈控制的充分条件,并保证闭环系统的容许性和满足一定的性能指标．通过数值仿真验证了结论的正确性以及分析方法的有效性．     

Online Delay—Evaluation Control for Networked Control Systems

This paper presented an evaluation approach of time delays for networked control systems (NCS). An improved scheme based on optimal LQG control was designed to achieve desired performance despite the uncertain delays in the system. The experimental results illustrate the effectiveness of the proposed control design and satisfactory performance of the closed-loop system.     

DESIGN OF A NEW INTERPOLATED CONTROLLER FOR STABILIZATION OF A SET OF INTERPOLATED PLANTS

IntroductionDynamics of almost all plants in reality variesaccording to the condition under which the plantis operated.An idea to describe the variation ofplant dynamics is interpolating a number of rep-resentative models defined at representative op-erating points.In Ref. [1 ] ,the plant was as-sumed to described as a linear interpolation ofproper stable coprime factorizations of transferfunctions of two representative models and thestabilization problems have been considered. InRef.[2 ] ,it…     

不确定多包传输网络控制系统的分析与设计

针对短时延的多包传输网络控制系统,研究了数据包传输次序不确定情况下系统的建模及控制问题.引入了补偿器来补偿多包传输过程中部分数据丢失对系统的影响,同时考虑不确定短时延的影响,将其建模成一类具有参数不确定的离散随机切换系统,并对系统的稳定性进行了分析.仿真结果证明了该方法的有效性.     

KEY TECHNOLOGY IN INTELLIGENT CONTROL FOR SHEET METAL DEEP DRAWING

Introduction　　 With development of economics and furtheropening,competitions in market are intensive.The margin between the material cost and price ofproducts becomes small,which compels companiesto pursue higher rate of productivity and quality.The rate of productivity has been improvedthrough high pressing automation,but in order toget satisfactory quality of products under distur-bances,on- line measurement,identification,pre-diction and on- line control must be realized. Intel-ligentcont…     

重型卡车主动悬置驾驶室舒适性仿真研究

为了满足长途运输时重型卡车行驶的平顺性要求,利用基于线性矩阵不等式(LMI)的H2控制算法对驾驶室安装了主动悬置的六自由度1/2重型卡车模型进行振动控制,所采用的路面激励为积分白噪声随机路面激励.大量的仿真结果显示,主动控制悬置系统明显降低了驾驶室的俯仰角加速度和俯仰角,采用主动控制悬置系统可有效地改善卡车行驶平顺性和乘坐舒适性.     

STUDY ON PARISON CAD OF PLASTIC CONTAINER AND DESIGN FOR ITS CONTROL SYSTEM

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｅｑｕｉｐｍｅｎｔｏｆｅｘｔｒｕｓｉｏｎｂｌｏｗｍｏｌｄｉｎｇｈａｓｔｈｅｆｅａｔｕｒｅｏｆｌｏｗｐｒｉｃｅａｎｄｓｈｏｒｔｍｏｌｄｉｎｇｃｙｃｌｅ,ａｎｄｄｅｖｅｌｏｐｓｑｕｉｃｋｌｙｔｏｓａｔｉｓｆｙｔｈｅｄｅｍａｎ...     

分数时滞DAHLIN数字调节器

本文提出了基于分数时滞概念的Dahlin数字调节器,解决了Dahlin算法的分数时滞控制问题。通过引入分数时滞整定参数γ,实现了不稳定逆系统的控制,这不仅可以准确地描述纯时滞过程,而且可将高阶过程合理地简化为低阶分数时滞模型,提高了系统的控制品质。文中给出的仿真例子对所得的结论进行了验证。     

不确定性时滞系统时滞相关鲁棒镇定

讨论了具有状态时滞的数值界不确定性线性系统的时滞相关鲁棒控制问题.将矩阵分解的思想应用于线性时滞系统的控制综合,利用Lyapunov-Krasovskii泛函方法,通过牛顿-莱布尼茨各项相互关系引入"0"阵,得到了系统的一种新的经过状态反馈控制后可鲁棒镇定的、基于LMI的、保守性较低的时滞相关条件.该方法既不需要对原系统进行模型变换,也不需要对交叉项进行界定.用算例说明了该方法的有效性.     

NUMERICAL ANALYSIS FOR VIBRATION CONTROL OF BEAMS WITH ACTIVE CONSTRAINED LAYER DAMPING TREATMENTS

IntroductionThe conventional passive constrained layerdamping (PCLD) treatments[1～ 3] are applied tomachines and structures widely over the lastcentu-ry because they are reliable and simple,however,they are not intelligent. Once the damping treat-ments are installed,they can not be adjusted andcan not adapt themselves to changeable environ-ment.Recently,active damping has received in-creasing attention in the aeronautic and astronauticindustries because of its significant and adjustabledamp…     

多值非线性系统的自适应控制

提出了带有多值非线性环节的线性离散系统的自适应控制算法，仿真实验的结果表明：该算法简单易行具有明显的优点，跟踪误差比采用一般的自适应控制算法时要小得多，且能保证闭环系统大范围近收敛。     

A FAST ALGORITHM FOR EXTREME FILTER OF 2D IMAGE

ＡＦＡＳＴＡＬＧＯＲＩＴＨＭＦＯＲＥＸＴＲＥＭＥＦＩＬＴＥＲＯＦ２ＤＩＭＡＧＥＸｕＬｅｉ（许磊）ＬｉＪｉｅｇｕ（李介谷）ＬｉＷｅｎｓｈｕｎ（李文舜）（ＩｎｓｔｉｔｕｔｅｏｆＰａｔｅｒｎＲｅｃｏｇｎｉｔｉｏｎ＆ＩｍａｇｅＰｒｏｃｅｓｓｉｎｇ，Ｓｈａｎｇ...     

A STEP-BY-STEP INTEGRAL METHOD FOR ACTIVELY CONTROLLED STRUCTURES

Introduction　　 Since 1 970 s,the researches in active controlofcivil engineering structures have been developedfor30 years[1] .It is now at the stage where full-scale active systems are installed in actual struc-tures and perform well for the purposes intend-ed[2 ,3 ] .Although a significant progress has beenmade,the true potential of active vibration controlremains non- exploited fully[4] .For example,manyof the current operating systems are designed pri-marily on the basis of the classical…     

PATH CONTROL OF A 3 DOF ROBOT MECHANISM ACTUATED WITH LOW PRESSURE AIR POWERED MOTORS

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