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检索条件"任意字段=International Conference on Complex Systems: Control and Modeling Problems"

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Parametric identification of nonlinear model for managed pressure drilling

Parametric identification of nonlinear model for managed pre...

引用

8th IFAC conference on Manufacturing Modelling, Management and control (MIM)

作者： Alexandrov, Albert G. Alexandrov, Vadim A. Shatov, Dmitriy V. Russian Acad Sci VA Trapeznikov Inst Control Sci Moscow 117901 Russia ADAPLAB LLC Moscow Russia

Managed pressure drilling;process is descried by nonlinear Nonlinear controller is proposed for this process. Model parameter is identified which is required to synthesize controller. Dynamic algorithm of frequency domain identification is used to estimate this parameter value. (C) 2016, IFAC (international Federation of Automatic control) Hosting, by Elsevier Ltd. All rights reserved.

关键词： adaptive control identification nonlinear systems nonlinear control managed pressure drilling problem

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Computer modeling of the Dynamics of Energy Consumption during Expanded Clay Burning

Computer Modeling of the Dynamics of Energy Consumption duri...

引用

international conference on complex systems: control and modeling problems

作者： Stanislav Galitskov Konstantin Galitskov Oleg Samokhvalov Samara State Technical University SamaraRussia

ISBN: (纸本)9781728167015

High-strength expanded clay is widely used in the construction industry for the construction of high-rise buildings, bridges and stressed reinforced structures, the construction of roads and airfield pavements, and in the construction of oil platforms. The use of expanded clay as a filler makes it possible to reduce the weight of structures, to increase their frost resistance and durability. The manufacturing of high-strength structural expanded clay is a complex, time-consuming and energy-intensive process. The share of fuel costs makes up for about a third of the cost of the finished product. Therefore, one of the main indicators that determine the economic efficiency of expanded clay manufacturing, in addition to productivity, is the ratio of volumetric fuel consumption to the volume of 1 m~3 of expanded clay being manufactured. It is possible to carry out energy-efficient manufacturing of expanded clay by automatically adjusting the expanded clay burning curve with a multidimensional automatic control system for the rotational speed of the kiln, the amount of expanded clay raw material loaded into the kiln, and the volumetric thermal power of the burner. This approach eliminates the operator-specific errors occurring in the "manual" burning control mode based on heuristic algorithms, and thereby ensures rational fuel consumption. In this paper, we consider a generalized process control structure for burning expanded clay in a rotary kiln, focused on modeling both "manual" and automatic kiln control. The created model allows one to track the dynamics of fuel costs for the manufacture of 1 m~3 expanded clay of various grades of strength. The authors present the technique of determining the coordinates of the operating points in the three-dimensional space of the output coordinates of the control object OT_FT_AT_C of the temperature-strength characteristic, which provides predicting the strength of the expanded clay obtained during automatic burning control. The te

关键词： clay combustion combustion equipment construction industry durability energy conservation energy consumption industrial economics kilns mechanical strength numerical analysis process control productivity raw materials Expanded clay Kilns energy consumption industrial economics combustion equipment Construction Industry Fuel consumption Combustion Process control raw material Energy conservation Computer Simulation MECHANICAL STRENGTH Durability clays

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Computer science as a lens on the sciences: The example of computational molecular biology

Computer science as a lens on the sciences: The example of c...

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IEEE/WIC/ACM international conference on Web Intelligence, WI 2007

作者： Karp, Richard M. University of California Berkeley United States University of California Berkeley United States International Computer Science Institute Berkeley United States

ISBN: (纸本)0769530265

This talk will trace the growing influence of fundamental ideas from computer science on the nature of research in a number of scientific fields. There is a growing awareness that information processing lies at the heart of the processes studied in fields as diverse as quantum mechanics, statistical physics, nanotechnology, neuroscience, linguistics, economics and sociology. Increasingly, mathematical models in these fields are expressed in algorithmic languages and describe algorithmic processes. The speaker will briefly describe connections between quantum computing and the foundations of quantum mechanics, and between statistical mechanics and phase transitions in computation. He will indicate how the growth of the Web has created new phenomena to be investigated by sociologists and economists. He will then focus in greater detail on computational molecular biology, where the view of living cells as complex information processing systems has become the dominant paradigm, and will discuss specific algorithmic problems arising in the sequencing of genomes, the comparative analysis of the resulting genomic sequences,the modeling of networks of interacting proteins, and the associations between genetic variation and disease.

关键词： Statistical mechanics

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15th international Scientific conference on Intellectual systems of Decision Making and problems of Computational Intelligence, ISDMCI 2019

15th International Scientific Conference on Intellectual Sys...

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15th international Scientific conference on Intellectual systems of Decision Making and problems of Computational Intelligence, ISDMCI 2019

ISBN: (纸本)9783030264734

The proceedings contain 49 papers. The special focus in this conference is on Intellectual systems of Decision Making and problems of Computational Intelligence. The topics include: Analysis of Objects Classification Approaches Using Vectors of Inflection Points;regression Spline-Model in Machine Learning for Signal Prediction and Parameterization;Intelligent Agent-Based Simulation of HIV Epidemic Process;on the Computational complexity of Learning Bithreshold Neural Units and Networks;Implementation of FPGA-Based Barker’s-Like Codes;controlled Spline of Third Degree: Approximation Properties and Practical Application;automatic Search Method of Efficiency Extremum for a Multi-stage Processing of Raw Materials;intellectual Information Technology of Analysis of Weakly-Structured Multi-Dimensional Data of Sociological Research;Investigation of Forecasting Methods of the State of complex IT-Projects with the Use of Deep Learning Neural Networks;some Features of the Numerical Deconvolution of Mixed Molecular Spectra;comparative Analysis of the Methods for Assessing the Probability of Bankruptcy for Ukrainian Enterprises;monitoring Subsystem Design Method in the Information control System;information-Entropy Model of Making Management Decisions in the Economic Development of the Enterprises;system Development for Video Stream Data Analyzing;methods and Means of Web Content Personalization for Commercial Information Products Distribution;automated Monitoring of Changes in Web Resources;recognition of Human Primitive Motions for the Fitness Trackers;development of Information Technology for Virtualization of Geotourism Objects on the Example of Tarkhany Geological Section;Information System for Connection to the Access Point with Encryption WPA2 Enterprise;development of System for Managers Relationship Management with Customers;Probabilistic Inference Based on LS-Method Modifications in Decision Making problems.

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Dynamics and control of the Bucket-Wheel Excavator part I: Dynamic modeling of Bucket-Wheel boom

Dynamics and control of the Bucket-Wheel Excavator part I: D...

引用

ASME 2014 international Design Engineering Technical conferences and Computers and Information in Engineering conference, IDETC/CIE 2014

作者： Luu, Quang Khanh Söffker, Dirk Department of Dynamics and Control University of Duisburg-Essen Duisburg Germany

ISBN: (纸本)9780791846391

Bucket-Wheel excavators (BWE) represent a specific type of complex machine system used in mining technology. During operation, the system is exposed to a number of external forces and disturbances like digging resistances on the Bucket-Wheel that cause transverse, longitudinal, and torsional vibrations. All vibrations will affect to normal working conditions, operational effectiveness, and may under specific conditions also effect the stability of the BWE. To increase working conditions advanced control systems can be applied controlling the dynamics, especially induced structural vibrations. In order to analyze and synthesize a controller for the above mentioned system, adequate modeling to describe the dynamical behavior of the system under real operating conditions is necessary. In a previous investigation, it was assumed that the Bucket-Wheel boom can be modeled as a flexible beam using the Euler-Bernoulli beam theory. Additionally it is assumed that the boom is attached to the excavator turning platform. The nonlinear modeling of the three-dimensional elastic boom considering the elasticity of suspending cables and also couplings resulting from geometrical nonlinear deformations is presented. Here the known modeling approach of higher order is used and extended to model the Bucket-Wheel boom of a Bucket-Wheel-Excavator including guided rotating motion in combination with digging resistance forces. The dynamic phenomena resulting from the higher-order modeling including higher-order geometrical couplings as well as the external excitations on the dynamic behavior of the Bucket-Wheel boom are analyzed in detail. Intensive simulation studies are realized demonstrating the effect of higher-order couplings as well as resulting destabilizing effects from the modeling. Copyright © 2014 by ASME.

关键词： Wheels

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Verification problems in conceptual workflow specifications

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15th international conference on Conceptual modeling, ER 1996

作者： Ter Hofstede, A.H.M. Orlowska, M.E. Rajapakse, J. Department of Computer Science University of Queensland Brisbane Qld 4072 Australia Distributed Systems Technology Centre University of Queensland BrisbaneQld 4072 Australia

ISBN: (纸本)9783540617846

Most of today's business requirements can only be accomplished through integration of various autonomous systems which were initially designed to serve the needs of particular applications. In the literature workfiows are proposed to design these kinds of applications. The key tool for designing such applications is a powerful conceptual specification language. Such a language should be capable of capturing interactions and cooperation between component tasks of workflows among others. These include sequential execution, iteration, choice, parallelism and synchronisation. The central focus of this paper is the verification of such process control aspects in conceptual workflow specifications. As it is generally agreed upon that the later in the software development process an error is detected, the more it will cost to correct it, it is of vital importance to detect errors as early as possible in the systems development process. In this paper some typical verification problems in worldlow specifications are identified and their complexity is addressed. It will be proven that some fundamental problems are not tractable and we will show what restriction is needed to allow termination problems to be recognized in polynomial time.

关键词： Specification languages

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Proceedings - 13th ISSAT international conference on Reliability and Quality in Design

Proceedings - 13th ISSAT International Conference on Reliabi...

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13th ISSAT international conference on Reliability and Quality in Design

ISBN: (纸本)9780976348627

The proceedings contain 83 papers. The topics discussed include: design-in quality and reliability via experimental design;a study on reducing fraction defective of slit in production process for rubber parts;robust design of dynamic systems using metamodeling and singular value decomposition;statistical inference about the location parameter of the three-parameter lognormal distribution;mortality modeling program developments;stochastic models for mutual physical interactions in system reliability framework;human error in railways: an investigative study;optimal software release problems based on customer requirements;a software reliability growth model incorporating imperfect debugging, generation of errors and time - delay fault removal;Markovian software service availability measurement with imperfect debugging;and monitoring the autocorrelated process mean and variance using a GWMA control chart.

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Designing robust controllers by the mini-max search method: Keynote paper

Designing robust controllers by the mini-max search method: ...

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2019 international Siberian conference on control and Communications, SIBCON 2019

作者： Zhmud, Vadim Stukach, Oleg Ivoilov, Andrey Roth, Hubert Dimitrov, Lubomir Dept. of Automation Novosibirsk State Technical University Novosibirsk Russia National Research University Higher School of Economics Novosibirsk State Technical University Moscow Russia Dept. of Automatic Control Engineering University of Siegen Siegen Germany Vice-Rector of Technical University of Sofia Sofia Bulgaria

ISBN: (纸本)9781538651414

The problem of regulators (controllers) design is extremely relevant in connection with the penetration into all technological areas of the methods of precise control of objects with feedback. Such devices are being more and more used, which increases the variety of controlled objects. This list includes all new objects of robotics and technological setups, which have much more complex mathematical models. One of the most urgent problems in this area is control of non-stationary objects. Parameters of mathematical model of these objects are given with some uncertainty, but not in fixed values, i.e. by only intervals of their possible changes. If the intervals are too wide, adaptive systems have to be designed, but if they are not too wide, then one can try to find a universal regulator setting that will be sufficiently effective for all ratios of the model parameters within the acceptable intervals of their changes. The paper proposes a new method of the numerical optimization of regulator for finding such a setting for the worst object model that is for the worst combination of all variable parameters. Finding the worst model is also carried out by a numerical optimization method, in which a combination of model parameters is found where the best regulator gives the worst result. The problem is proposed to solve in several optimization cycles with alternation of objective functions. The technique has been well illustrated by a numerical example. © 2019 IEEE.

关键词： controllers

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Fundamental Concepts, problems and Algorithms for Wireless Power Transfer in Adhoc Communication Networks 17

Fundamental Concepts, Problems and Algorithms for Wireless P...

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20th ACM international conference on modeling, Analysis and Simulation of Wireless and Mobile systems (MSWiM)

作者： Nikoletseas, Sotiris Univ Patras Comp Engn & Informat Dept Patras Greece CTI SensorsLab Rion Greece

ISBN: (纸本)9781450351645

A Wireless Power Transfer (WPT) system consists of chargers which transmit power wirelessly and receivers which harvest the radio frequency energy from the chargers. WPT has evolved to a very active research subject, as well as a topic of rapid technological progress and emerging practical development and commercial applications. However, a solid foundational and algorithmic framework seems still necessary for WPT to achieve its full potential. In this respect, the talk aims to discuss different characteristic abstract WPT models (scalar, vector, peer to peer) and present key optimization problems (power maximization, coverage, placement, radiation control). Relevant algorithmic design and analysis methods and performance properties (and their trade-offs) are also provided, as well as interesting WPT notions and concepts (such as super-additive and cancellation phenomena in the received power, notions of electromagnetic radiation control in dense, strong WPT fields and energy-aware distributed network formation in large populations of very weak mobile nodes).

关键词： Wireless Power Transfer Algorithms Ad Hoc Networks

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modeling and Analysis of Gyrowheel with Friction and Dynamic Unbalance 16th

Modeling and Analysis of Gyrowheel with Friction and Dynamic...

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Joint conference of the 16th Asia Simulation conference / SCS international Autumn Simulation Multi-conference (AsiaSim/SCS AutumnSim)

作者： Zhao, Qing Yao, Yu Liu, Xiaokun Zhao, Hui Harbin Inst Technol Control & Simulat Ctr Harbin 150001 Peoples R China Harbin Inst Technol Sch Astronaut Harbin Peoples R China

ISBN: (纸本)9789811026638;9789811026621

Gyrowheel is an integrated servo device which is applied as both sensor and actuator in micro-spacecraft. In practice, the undesirable mechannical factors generated from manufacturing could effect the accuracy of measurement and actuating, so it is necessary to analyze these undesirable effects on Gyrowheel for diagnosing the kind of mechannical errors even providing a sort of restraining method. In this paper, two common undesirable mechannical factors, the friction of the universal joint cross and the dynamic unbalance of rotor, are described in the Gyrowheel model built by Matlab/SimMechanics. The tilt angles response of the rotor in both time and frequency domains are developed in this paper, which provides simulation foundation and error analysis criterion for Gyrowheel prototype testing.

关键词： Gyrowheel Undesirable mechannical factor Friction Dynamic unbalance

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