检索结果-内蒙古大学图书馆

Modelling and control of Water Supply Systems

IFAC Proceedings Volumes 1998年第20期31卷 543-548页

作者： Nedjeljko Perić Ivan Petrović Ante Magzan University of Zagreb Croatia Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation Končar-Electrical Engineering Institute Zagreb Croatia

A dynamical mathematical model of a water supply plant based on lumped parameters is described. A concept of its control system is proposed that ensures output pressure stabilisation under conditions of variable water consumption and variable water recourses. The control system consists of inner control loops which control the flow of each pump station and of a superimposed control loop that controls the output pressure of the water supply plant. The pressure controller calculates the cumulative reference value of the water flow for all controlled pumps and from this value an algorithm for the flow distribution calculates the reference flow for each inner loop, taking into account the level of water accumulation in each water well. control performances of output pressure obtained by a conventional PI controller and a fuzzy logic based controller are compared.

关键词： Large-scale systems Pressure control Flow control Pipelines Plants Mathematical models Fuzzy control

来源：评论

学校读者我要写书评

暂无评论

Improved Fuzzy Autopilot for Track-Keeping

引用

IFAC Proceedings Volumes 1998年第30期31卷 123-128页

作者： Zoran Vukić Edin Omerdić Ljubomir Kuljaca University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation Unska 3 HR-10000 Zagreb Croatia University of Tuzla Faculty of Electrical and Mechanical Engineering Department of Control Engineering in Automation Franjevačka 2 BH-75000 Tuzla Bosnia and Herzegovina

Improved 2-input fuzzy autopilot for ship course control and 3-input fuzzy autopilot for track-keeping are proposed. Nonlinear model of a ship and a steering subsystem is used. The 3-input fuzzy autopilot uses heading signal, yaw rate signal and lateral offset from the nominal track to produce a command rudder angle. Input variable fuzzyfication, fuzzy associative memory rules and output set defuzzyfication are described. Obtaining of FAM rules for 3-input fuzzy is described. Dynamical behavior of 2 and 3-input fuzzy autopilot is compared. The influence of wave disturbance, sea current and external disturbance from a passing ship on track-keeping performance was analyzed.

关键词： Disturbance rejection Fuzzy control Nonlinear control systems Ship control

来源：评论

学校读者我要写书评

暂无评论

Rudder servo-system fault diagnosis using neural network fault modeling

Rudder servo-system fault diagnosis using neural network fau...

引用

OCEANS

作者： Z. Vukic D. Pavlekovic H. Ozbolt Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Zagreb Croatia

The model based fault detection and identification scheme for the rudder servo system as the actuator in the closed loop course keeping control system is presented. The nonlinear process model that enables description of a wide class of fault types is given and the fault function as the residual for detecting and identifying the fault is introduced. A fault detection scheme with variable thresholds is suggested and its performance has been tested via simulation in the presence of modeling uncertainty and noise. A fault identification scheme based on comparison between the fault function estimate and the output of a predefined analytical fault model is suggested.

关键词： Fault diagnosis Neural networks Fault detection control systems Automatic control Actuators control system synthesis Redundancy control engineering computing computer networks

来源：评论

学校读者我要写书评

暂无评论

Comparison of the self-tuning generalized predictive controller and pole placement controller

Comparison of the self-tuning generalized predictive control...

引用

Mediterranean Electrotechnical Conference (MELECON)

作者： I. Santro N. Peric I. Petrovic Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Zagreb Croatia

The basic principles of the self-tuning generalized predictive controller (GPC) and the self-tuning pole placement controller are presented. A laboratory shell-and-tube heat exchanger is used to test the properties of the presented controllers. The self-tuning GPC were compared with the self-tuning pole placement controller regarding their parameter adjustment complexity, reference and disturbance step responses and robustness to differences between the real process and its mathematical model.

关键词： State feedback Automatic control Predictive models Optimal control Costing Cost function control engineering computing Laboratories Testing Robust control

来源：评论

学校读者我要写书评

暂无评论

Adriatic Sea noise spectrum measurement and polynomial approximation

Adriatic Sea noise spectrum measurement and polynomial appro...

引用

OCEANS

作者： D. Matika H. Ozbolt Ministry of Defense of the Republic of Croatia Zagreb Croatia Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Zagreb Croatia

Based on the research at the location "Middle Adriatic", the analysis of the noise spectrum of the Adriatic Sea is presented. The applied measurement method and necessary instrumentation, followed by the basic scheme of the measurement channel, are given. A representative Adriatic Sea noise spectrum for the particular location is given, with the sea state as a parameter. A regression analysis is made that led to an appropriate approximation polynomial of the spectrum.

关键词： Sea measurements Noise measurement Polynomials Frequency Low-frequency noise Wind speed control engineering computing Noise level Rain Ice

来源：评论

学校读者我要写书评

暂无评论

A Semi-Empirical and a Neural Network Model of a Batch Plant Dynamics for Flexible Recipes control

引用

IFAC Proceedings Volumes 1998年第11期31卷 289-294页

作者： Srečko Milanič Rihard Karba Davorka Šel Nadja Hvala Stanko Strmčnik Faculty of Electrical and Computer Engineering Tržaška 25 1000 Ljubljana Slovenia fax: +386 61 126 46 31 “Jožef Stefan” Institute Department of Computer Automation and Control Jamova 39 1001 Ljubljana Slovenia

In order to apply a model based control strategy such as flexible recipes control to an industrial batch process, a model of the process dynamics is needed. This paper presents the modelling procedure for two such models: a semi-empirical and an artificial neural network model. Both models predict precipitation rates of TiO 2 particles in an industrial hydrolysis process. Model properties and their prediction accuracy is compared. The artificial neural network is trained using the augmented training data set approach. A simulator has been designed to study the application Of flexible recipe instructions.

关键词： modelling identification neural network models batch control model-based control

来源：评论

学校读者我要写书评

暂无评论

A Method of PID controller Autotuning

引用

IFAC Proceedings Volumes 1997年第6期30卷 597-602页

作者： Nedjeljko Perić Ivan Petrović Ivan Branica University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation Unska 3 10000 Zagreb Croatia

A method of PID controller autotuning based on relay feedback control is described. Special attention is paid to the process structure and parameters estimation in the phase of reaching the desired operating point. This may increase the method's robustness and also speed up the tuning procedure. The algorithm's validity is illustrated by some simulation results and an experimental result on a laboratory pilot plant. Il est decrit la mèthode du régulateur d'autoadaptation PID basée au système asservi à relais. L'attention particulierè est consacrée à l'estimation de la structure et des paramètres du procès à la phase dans laquelle on met le proces dans le point de fonetionnement dont on augmente la robustesse et la vitesse de l'autoadaptation. Nous avons presenté certains résultats de la simulation à l'ordinateur ainsi qu'à l'installation pilote qui attestent la validité des algorithmes élaborés.

关键词： Autotuners Describing functions Limit cycles PID controllers Relay control

来源：评论

学校读者我要写书评

暂无评论

Fuzzy Autopilot for Ships Experiencing Shallow Water Effect in Manoeuvering

引用

IFAC Proceedings Volumes 1997年第22期30卷 99-104页

作者： Zoran Vukić Edin Omerdić Ljubomir Kuljača University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation Unska 3 HR-10000 Zagreb Croatia

A fuzzy autopilot for ship path control is proposed. Nonlinear model of a ship and a steering subsystem is used. The autopilot uses heading signal and yaw rate signal to produce a command rudder angle. The autopilot does not use lateral offset from the nominal track. Input variable fuzzyfication, fuzzy associative memory rules and output set defuzzyfication are described. The influence of the shallow water effect during larger maneuver is analyzed.

关键词： Disturbance rejection Fuzzy control Nonlinear control systems Ship control

来源：评论

学校读者我要写书评

暂无评论

Kinematic evaluation of robotic biped locomotion systems

Kinematic evaluation of robotic biped locomotion systems

引用

International Conference on Advanced Robotics (ICAR)

作者： F.M. Silva J.A. Tenreiro Machado Department of Control and Automation Modern University Portugal Department of Electrical and Computer Engineering Faculty of Engineering University of Porta Portugal

This paper presents the kinematic study of robotic biped locomotion systems. The main purpose is to determine the kinematic characteristics and the system performance during walking. For that objective, the prescribed motion of the biped is completely characterised in terms of five locomotion variables: step length, hip height, maximum hip ripple, maximum foot clearance and link lengths. In this work, we propose three methods to quantitatively measure the performance of the walking robot: perturbation analysis, lowpass frequency response and locomobility measure. These performance measures are discussed and compared in determining the robustness and effectiveness of the resulting locomotion.

关键词： Kinematics Robots Legged locomotion Hip Frequency measurement System performance Foot Performance analysis Frequency response Robustness

来源：评论

学校读者我要写书评

暂无评论

Kinematic analysis of artificial biped locomotion systems

Kinematic analysis of artificial biped locomotion systems

引用

IEEE International Conference on Intelligent engineering Systems (INES)

This paper presents the kinematic study of robotic biped locomotion systems. The main purpose is to determine the kinematic characteristics and the system performance during walking. For that objective, the prescribed motion of the biped is completely characterised in terms of five locomotion variables: step length, hip height, maximum hip ripple, maximum foot clearance and link lengths. In this work, we propose three methods to quantitatively measure the performance of the walking robot: locomobility measure, perturbation analysis, and low pass frequency response. These performance measures are discussed and compared in determining the robustness and effectiveness of the resulting locomotion.

关键词： Kinematics Legged locomotion Hip Frequency measurement Robots System performance Foot Performance analysis Frequency response Robustness

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：