Guaranteed Feasible Control Allocation using Model Predictive Control

This paper proposes a guaranteed feasible control allocation method based on the model predictive control. Feasible region is considered to guarantee the determination of the desired virtual control signal using the pseudo inverse methodology and is described as a set of constraints of an MPC problem. With linear models and the given constraints, feasible region defines a convex polyhedral in the virtual control space. In order to reduce the computational time, the polyhedral can be approximated by a few axis aligned hypercubes. Employing the MPC with rectangular constraints substantially reduces the computational complexity. In two dimensions, the feasible region can be approximated by a few rectangles of the maximum area using numerical geometry techniques which are considered as the constraints of the MPC problem. Also, an active MPC is defined as the controller to minimize the cost function in the control horizon. Finally, several simulation examples are employed to illustrate the effectiveness of the proposed techniques.     

Bifurcation Control,Manufacturing Planning and Formation Control

The paper consists of three topics on control theory and engineering applications, namely bifurcation control, manufacturing planning, and formation control. For each topic, we summarize the control problem to be addressed and some key ideas used in our recent research. Interested readers are referred to related publications for more details. Each of the three topics in this paper is technically independent from the other ones. However, all three parts together reflect the recent research activities of the first author, jointly with other researchers in different fields.     

A Novel Control Method for Networked Control Systems

Networked control system is a new hot-point in control engineering. The reduction of bandwidth necessitated by the communication network in a networked control system is the major concern. For this reason, a method of reducing the number of data packet exchanges between the sensor and the controller/actuator is explored. A novel structure of controller and special transmission rule are designed for reducing the number of data packet exchanges and making the system stable.     

Control of unstable mechanical system Control of pendulum†

This paper relates to the design of a control system for a mechanical system which contains an unstable mode and to an experiment for demonstrating that the control theory may be applied to practical real systems. In this paper the object treated is the control of the pendulum-cart system, which has been studied by many control theorists and engineers as an inverted pendulum problem, and a composite control system is designed not only to stabilize the inverted pendulum but to swing the pendulum from the natural pendent position up to the inverted position, which is actually made. The experimental results are presented.     

Universal Remote Control

虽然我们刚刚才进入Vista时代，但其先进性和易用性早已有目共睹，Vista更强调PC与家用电器的结合，让我们兴奋的是，支持Vista的多功能遥控器已粉墨登场，这一代产品综合了MCE遥控器和传统多媒体遥控其的特征，更强调易用性，交互性，外观么，当然更是一级棒了！[编者按]     

Generic Motion Control

2008年,B＆R提出了GMC（Generic Motion Control）这一前瞻性概念,它着眼于建立面向整厂级的运动控制方案,力图使得这个架构能够适应未来市场不断变化的需求和对成本不断增加的压力。     

An Improved Production Activity Control Architecture for Shop Floor Control

This paper presents a further improved Production Activity Control Architecture to deal with the complexity of information by creating Sub-Producers and Sub-Movers which will not only give a better control at workstation level but also reduce load on the Dispatcher. It also makes an analysis of the basic and improved PAC (Production Activity Control) Architecture in the Control System for Integrated Manufacturing. The PAC Architecture and the improvement will further enhance the flexibility and adaptability of the architecture in the ever changing environment of the Shop Floor Control (SFC) Systems.     

Stable Fault-tolerance Control for a Class of Networked Control Systems

In this paper, we use the matrix measure technique to study stable fault-tolerance control of networked control systems. State feedback networked control systems with the network-induced delay, parameter uncertainties, sensor failures and actuator failures are considered. State feedback gain K is designed for any invariant delay T, and some theorems and sufficient conditions for stable fault-tolerance control are given. Example is presented to illustrate the effectiveness of these theorems.     

edictive Control StrategyJIN Xiao

ming,WANG Shu qing,RONG Gang (National key lab.for Industrial Control,Zhejiang Univ.,Hangzhou 310027,China)The basic principle of predictive functional control is introduced systematically.The control algorithm for first order p     

Research on Dual Control

This paper summarizes recent progress by the authors in developing two solution frame-works for dual control. The first solution framework considers a class of dual control problems where there exists a parameter uncertainty in the observation equation of the LQG problem. An analytical active dual control law is derived by a variance minimization approach. The issue of how to determine an optimal degree of active learning is then addressed, thus achieving an optimality for this class of dual control problems. The second solution framework considers a general class of discrete-time LQG problems with unknown parameters in both state and observation equations. The best possible (partial) closed-loop feedback control law is derived by exploring the future nominal posterior probabilities, thus taking into account the effect of future learning when constructing the optimal nominal dual control.     

A Key-Lock Access Control

Access control is one of the serious problems in modern information systems.In this paperwe suggest a key-lock strategy to represent the privilege relationship involving lineartransformations and nonlinear constraints.The implementation shows that this strategy hasgot the properties of security,and information hidden,and satisfies the least privilege principle,This distributed management of sensitive data adapts the distributed systems well.     

ActiveX Control深入编程

本文对ＡｃｔｉｖｅＸ控件及其Ｃｏｎｔａｉｎｅｒ的编程中一些较深入的问题提供了解决方案。     

Total Control可堆叠

3Com计划将Total Control远程访问平台变成可堆叠形式,并称之为SuperStack Ⅱ Remot Access 3000,该系列产品也能与SuperStack Ⅱ的交换机集成在一起。这意味着可从单个点上管理LAN和WAN传输口。一家ISP公司的技术副总裁说,管理和配置的简便性对减少启动时间至关重要。“以前,我们要执行整个控制总得花三天时间,现在,半个小时就可解决了。”他目前正在测试Remote Access 3000。     

3Com扩展Total Control

3Com 公司宣布为其在 Total Control 1000多服务访问平台提供的新卡组选择。这些新型 Total Control 1000增强型数据系统卡组增加了3Com 公司旗舰平台的端口密度,改善了它的性能,并且提供扩展的服务能力。Total Control 1000增强数据系统的新型通用 DSP 卡组以目前卡组四倍的呼叫处理能力和多种接口选择为特色,其中包扩支持持续用户增长的 DS3和 STM-0接口,这正是世界各地许多运营商和服务提供者所正在面对的需求。     

Model Predictive Control of Nonlinear Systems： Stability Region and Feasible Initial Control

This paper proposes a new method for model predictive control (MPC) of nonlinear systems to calculate stability region and feasible initial control profile/sequence, which are important to the implementations of MPC. Different from many existing methods, this paper distinguishes stability region from conservative terminal region. With global linearization, linear differential inclusion (LDI) and linear matrix inequality (LMI) techniques, a nonlinear system is transformed into a convex set of linear systems, and then the vertices of the set are used off-line to design the controller, to estimate stability region, and also to determine a feasible initial control profile/sequence. The advantages of the proposed method are demonstrated by simulation study.     

Total Control添千兆路由器

3Com公司4月11日宣布,该公司正在扩展其CommWorks体系结构,新体系将包括针对电信服务提供商的千兆位路由器产品系列。新推出的Total Control 100千兆位路由器能够让高密度的分组业务流量通过服务提供商的IP网络传递,增加CommWorks体系的可靠     

浅析Control Net现场总线

ControlNet作为符合IEC国际标准的现场总线,综合了现有各种网络的能力,提供了控制器与现场测量控制设备之间的高速通信链路。它是一种高速确定性网络,适用于对时间有苛刻要求的应用场合,在工业控制系统中,ControlNet网络得到了很好的推广和应用。     

Fuzzy Logic Control ASIC Chip

A fuzzy logic control VLSI chip,F100,for industry process real-time control has been designed and fabricated with 0.8μm CMOS technology.The chip has the features of simplicity,felexibility and generality.This paper presents the Fuzzy control inrerence method of the chip,its VLSI implementation,and testing esign consideration.     

Software Reliability Experimentation and Control

This paper classifies software researches as theoretical researches, experimental researches, and engineering researches, and is mainly concerned with the experimental researches with focus on software reliability experimentation and control. The state-of-the-art of experimental or empirical studies is reviewed. A new experimentation methodology is proposed, which is largely theory discovering oriented. Several unexpected results of experimental studies are presented to justify the importance of software reliability experimentation and control. Finally, a few topics that deserve future investigation are identified.