检索结果-内蒙古大学图书馆

IEEE Conference on control Technology and Applications (CCTA)

作者： Peter Bauer Balazs Kulcsar Jozsef Bokor Delft Center for System and Control Faculty 3ME Technical University Delft Delft Netherlands Faculty of Transportation Engineering Department of Control and Transport Automation Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

The paper proposes a new, discrete time LQ optimal controller synthesis for output tracking over an infinite horizon. The resulted controller consists of a state feedback and a feedforward term. The solution requires a one step ahead prediction of the reference signal. For a smooth enough reference signal this can be replaced with extrapolation. Here, the properties for constant reference signals are examined, time varying references will be covered with another article. The method guarantees asymptotical stability and zero steady state tracking error. The elaborated techniques satisfy the separation principle for an arbitrary deterministic or stochastic state estimator. The reference tracking problem for a quadrotor helicopter is solved by the method. The trajectory tracking control is successfully applied both with reference signal preview and extrapolation (considering time varying references also).

关键词： control systems USA Councils Conferences

来源：评论

学校读者我要写书评

暂无评论

Nonlinear Predictive control of processes with variable time delay. A temperature control case study

Nonlinear Predictive Control of processes with variable time...

引用

IEEE Conference on control Technology and Applications (CCTA)

作者： M. Sbarciog R. De Keyser S. Cristea C. De Prada EeSA- Department of Electrical Energy Systems and Automation Ghent University Ghent Belgium Department of Systems Engineering and Automatic Control Faculty of Sciences University of Valladolid Spain

Material or fluid transportation is a commonly encountered phenomenon in industrial applications, generating variable time delay that makes the design of feedback control loops more difficult. This paper investigates the applicability of MPC (Model Predictive control) strategies to this type of processes. The experimental setup consists of a heated tank, of which the outlet temperature (measured at a certain distance from the tank) is controlled by manipulating the outlet flow. The nonlinear EPSAC (Extended Prediction Self-Adaptive control) approach is used, which reduces the complexity of nonlinear optimization to iterative quadratic programming. It is shown that developing a process model in which dynamics are decoupled from the variable time delay leads to a Smith predictor-like control structure, that allows the proper operation of the control loop with fixed control parameters. The performance of the predictive controller is compared on the pilot plant to the performance of classic control approaches for systems with time delay.

关键词： control systems USA Councils Conferences

来源：评论

学校读者我要写书评

暂无评论

On the use of proper weighting in reference tracking optimal control with guaranteed DARE solvability

On the use of proper weighting in reference tracking optimal...

引用

Mediterranean Conference on control and automation (MED)

作者： Peter Bauer Balazs Kulcsar Jozsef Bokor Transportation Engineering Department of Control and Transport Automation Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Delft Center of System and Control Faculty ME Technical University of Delft Delft Netherlands

The paper suggests to apply a proper output weight to achieve guaranteed discrete algebraic Riccati equation (DARE) solvability of the LQ optimal control problem with output tracking. Usually a positive semi definite state weighting matrix (Q) is mentioned to be sufficient for solvable DARE. However, the literature also proposes more general rank conditions. The paper shows a sufficient condition to guarantee DARE solvability under output tracking problems, by the appropriate selection of a Q > 0 matrix. At output tracking quadratic problems Q results as a sparse matrix. Therefore, a special attention has to be carried on the output weighting strategy guaranteing DARE solvability for a class of linear and mostly integrating systems. Injecting additional weights, the closed system performance can be increased. The importance of the proper weighting strategy is illustrated with a numerical example where it has been pointed out that inappropriate weights leads to infeasible DARE.

关键词： automation Conferences

来源：评论

学校读者我要写书评

暂无评论

Cement rotary kiln control: A supervised adaptive model predictive approach

Cement rotary kiln control: A supervised adaptive model pred...

引用

IEEE India Conference (INDICON)

作者： Javaneh Ziatabari Alireza Fatehi Mohamad T. H. Beheshti Department of Electrical Engineering University of Trabiat Modares Tehran Iran Advanced Process Automation and Control (APAC) research group Faculty of Electrical Engineering K.N. Toosi University of Technology Tehran Iran

Considering the need of an advanced process control in cement industry, this paper presents an adaptive model predictive algorithm to control a white cement rotary kiln. As any other burning process, the control scenario is to expect the controller to regulate the temperature and the period of baking a fixed quantity of raw material as desired, as well as to have the concentration of the combustion gases under control. To achieve these goals, this work presents a strategy which includes multivariable online identification of the kiln process and a constrained generalized predictive controller. An MLP neural network model derived from real plant data of Saveh cement factory in Iran is used as the kiln process simulator. The control efforts are made taken into account the operating constraints. At last the proposed control strategy is modified so as to gain good disturbance rejection ability.

关键词： Kilns Programmable control Adaptive control Predictive models Temperature control Process control Cement industry Prediction algorithms Raw materials Combustion

来源：评论

学校读者我要写书评

暂无评论

Relative stabilities of adsorbed versus substitutional Al atoms in submonolayer Al/SixGe1−x(111)

引用

Physical Review B 2008年第16期78卷 165409-165409页

作者： D. V. Gruznev D. A. Olyanich D. N. Chubenko Yu. V. Luniakov I. A. Kuyanov A. V. Zotov A. A. Saranin Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia

Using scanning tunneling microscopy, low-energy electron-diffraction observations, and density-functional calculations, the effect of adding Ge to Si(111) substrate on the reconstructions induced by Al adsorption has been studied. It has been found that Ge incorporation alters the relative stability of the reconstructions. In particular, while in the “pure” Al/Si(111) system the magic cluster array (α−7×7 phase) is less stable than the 3×3 reconstruction (to which it irreversibly converts upon heating above 600 °C), in the Al/SixGe1−x(111) system magic clusters possess an enhanced thermal stability and persist almost up to the Al desorption temperature of ∼800°. The results of calculations allow us to track the sequential stages of the substitution of Si atoms by Ge in the α−7×7 phase. The general trend found is that adding Ge to Si(111) makes the Al substitutional configuration more preferable than the Al adatom configuration, which is opposite to the relative stabilities of the configurations in the pure Al/Si(111) system.

关键词：

来源：评论

学校读者我要写书评

暂无评论

First Experience of the control System of HVAC Based on KNX Fieldbus Applied in Intelligent Buildings Laboratory

First Experience of the Control System of HVAC Based on KNX ...

引用

The First International Conference on Building Energy and Environment

作者： Martin Zalesak Petr Polach Tomas Bata University in Zlín Faculty of Applied InformaticsDepartment of Automation and Control EngineeringNad Stráněmi 4511 760 05 ZlínCzech Republic Brno University of Technology Faculty of Electrical Engineering and CommunicationDepartment of Control and InstrumentationKolejní 4612 00 BrnoCzech Republic

A new multipurpose laboratory of building technology has been built in Tomas Bata University, faculty of Applied Informatics and set into test operation. The laboratory supports several subjects like modern HVAC system applications, with renewable sources of energy implemented (solar collectors and reversible heat pump application), and a comprehensive system of control, based on the open bus communication system KNX , communication gate based on the TCP/IP protocol. The laboratory is as well equipped as a training tool for control systems based on bus communication particularly KNX (finished) and LONWORKS and BACNET (under construction). The paper describes the first results achieved by the laboratory.

关键词： Intelligent buildings, Building automation, System integration, Laboratory, Thermal modeling

来源：评论

学校读者我要写书评

暂无评论

A Neuro-Fuzzy controller for Rotary Cement Kilns

引用

IFAC Proceedings Volumes 2008年第2期41卷 13259-13264页

作者： Maryam Fallahpour Alireza Fatehi Babak N. Araabi Morteza Azizi Control & Intelligent Processing Center of Excellence School of Electrical & Computer Eng. University of Tehran Tehran Iran Advanced Process Automation & Control (APAC) Research Group Electrical Engineering Faculty K. N. Toosi University of Technology Tehran Iran Saveh Cement Co. Saveh Iran

In this paper, we design a neurofuzzy controller to control several variables of a rotary cement kilns. The variables are back-end temperature, pre-heater temperature, oxygen content and CO2 gas content of the kiln. The fuzzy control system, as an advanced control option for the kilns, is intended to minimize the operator interaction in the control process. The proposed fuzzy controller uses a neural network to optimize TSK-type fuzzy controller. Since there is no generally applicable analytical model for cement kilns, we use the real data derived from Saveh cement factory for the plant identification. A model, which is very similar to the real plant, is identified then; and the identified model is used for control design and simulations. Extensive simulation studies justify the effectiveness and applicability of the proposed control scheme in intelligent control of cement plant.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Model-based nonlinear optimal blood glucose control of Type I diabetes patients

Model-based nonlinear optimal blood glucose control of Type ...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Levente Kovacs Balazs Kulcsar Jozsef Bokor Zoltan Benyo Department of Control Engineering and Information Technology Budapest University슠of슠Technology슠and슠Economics Hungary Delft Center for System and Control Faculty of Mechanical Maritime and Materials Engineering Technical University Delft Netherlands Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary

Using induced L 2 -norm minimization, a robust controller was developed for insulin delivery in Type I diabetic patients. The high-complexity nonlinear diabetic patient Sorensen-model [1] was considered. LPV (Linear Parameter Varying) methodology was used to develop open loop model and robust controller. Considering the normoglycemic set point (81.1 mg/dL), a polytopic set was created over the physiologic boundaries of the glucose-insulin interaction of the Sorensen-model. In this way, LPV model formalism was defined. The robust control was developed considering input and output multiplicative uncertainties with other weighting functions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A novel automatic method for multivariable process pairing and control

A novel automatic method for multivariable process pairing a...

引用

IEEE India Conference (INDICON)

作者： M.-A. Moezzi A. Fatehi M.A. Nekoui Advanced Process Automation and Control (APAC) K. N. Toosi University of Technology Tehran Iran Electrical Engineering Faculty K.N. Toosi University of Technology Tehran Iran

Pairing is the first step of decentralized controller design procedure in multi-input multi-output (MIMO) processes. In spite of considerable efforts dedicated to this problem, most of the known pairing techniques are offline algorithms and fail to decide when dealing with high dimensional and/or time varying processes and adaptive control applications. In this article, normalized effective relative gain array (NERGA) is introduced as an effective automatic pairing method and is employed in a new adaptive decentralized PID control strategy.

关键词： Automatic control Process control MIMO Adaptive control Distributed control Steady-state Design automation Programmable control System identification Transfer functions

来源：评论

学校读者我要写书评

暂无评论

Single-Parameter Tuning of PI controllers: From Theory to Practice

引用

IFAC Proceedings Volumes 2008年第2期41卷 4964-4969页

作者： Radek Matušů Roman Prokop Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 760 05 Zlín Czech Republic Tel: +420 57 603 3015 Fax: +420 57 603 5279

The paper deals with influence of a single scalar positive tuning parameter on performance properties of the closed control loop which contains algebraically designed PI controller while the response quality is evaluated by the size of first under- or overshoots. The controller coefficients are calculated from general solutions of diophantine equations in the ring of proper and Hurwitz stable rational functions. Subsequently, these controllers can be tuned by the only parameter. The contribution brings simple tuning rules and, moreover, it presents their possible practical application during control of real laboratory model assumed as system with parametric uncertainty.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：