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18th International Carpathian control Conference, ICCC 2017

作者： Czebe, Jiří Škuta, Jaromír Department of Control Systems and Instrumentation Faculty of Mechanical Engineering VSB Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781509048625

This paper deals with usage of single-chip computers for controlling MIMO systems. The aim is to design a general control system, which is easy to use and easy to implement for other MIMO systems. The performance of control system is limited by the performance of used MCU (PIC 16F876A) and its peripherals (2×PWM, 8×A/D, MAC,...). The key tasks of MCU are communication with upper level and implementation of required control action together with data collection. The serial interface provides communication between control system (PC) and MCU. SCADA/HMI system monitors a controlled system. The application is accessible via Internet browser in local area network (LAN). © 2017 IEEE.

关键词： Signal processing

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A Soft Sensor for Prediction of Temperature Rises on a Ball Screw Shaft Using Extreme Learning Machine

A Soft Sensor for Prediction of Temperature Rises on a Ball ...

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International Electrical engineering Congress (iEECON)

作者： Witchukorn Dcchrudee Sarawan Wongsa Shyh-Leh Chen Department of Control Systems and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Mechanical Engineering National Chung Cheng University Chiayi Taiwan (R.O.C.)

ISBN: (纸本)9781538623183;9781538623176

A high speed ball screw driving system generates considerable heat and causes significant thermal expansion, which affects the accuracy of position. In order to properly deal with thermal errors and resultant thermal deformation, continuous precision thermal monitoring along the ball screw shaft is required. However, the working temperature of the ball screw shaft is difficult to measure online. Therefore, in this paper we propose a soft sensor based on an extreme learning machine (ELM) method for predicting the distributions of temperature rises on the ball screw shaft of a feed drive. ELM is an emerging learning algorithm for single-hidden layer feedforward neural networks (SLFNs) training that has recently attracted many researchers' interest due to its impressive generalisation performance at fast training speed. The performance of the ELM soft-sensor is investigated on the thermal expansion process of the ball screw system simulated by the finite element method (FEM). The results show that the ELM-based soft sensor provides good generalisation performance with much faster speed than the traditional backpropagation artificial neural network (BP-ANN).

关键词： Finite element analysis Training Temperature sensors Temperature distribution Shafts Temperature measurement

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Simulation of Aircraft Electrical Power Supply System

Simulation of Aircraft Electrical Power Supply System

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International Conference on Information Technologies in engineering Education (Inforino)

作者： A.A. Efimov S.Yu. Melnikov A.G. Garganeev Department of control in technical systems Saint-Petersburg State University of Aerospace Instrumentation Saint-Petersburg Russia Department of power and electrical engineering The National Research Tomsk Polytechnic University Tomsk Russia

This paper proposes a simulated model of the aircraft electrical power supply system (AEPSS) developed in the MATLAB/Simulink environment, the power part of which contains a magnetoelectric generator (MEG) and a three... 详细信息

ISBN: (纸本)9781538658338

关键词： Aerospace electronics Voltage measurement Power supplies Voltage control Aircraft Switches Task analysis

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Preface

Advances in Intelligent Systems and Computing

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Advances in Intelligent systems and Computing 2019年 698卷 v-vi页

作者： Malik, Hasmat Srivastava, Smriti Sood, Yog Raj Ahmad, Aamir Department of Instrumentation and Control Engineering Netaji Subhas Institute of Technology New DelhiDelhi India National Institute of Technology Puducherry India Perceiving Systems Department Max Planck Institute for Intelligent Systems Tübingen Germany

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A comparison of nonsmooth, nonconvex, constrained optimization solvers for the design of time-delay compensators

arXiv

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arXiv 2018年

作者： Kungurtsev, Vyacheslav Mitchell, Tim Vyhlídal, Tomáš Department of Computer Science Faculty of Electrical Engineering Czech Technical University in Prague Max Planck Institute for Dynamics of Complex Technical Systems Magdeburg Germany Department of Instrumentation and Control Engineering Faculty of Mechanical Engineering Czech Institute of Informatics Robotics and Cybernetics Czech Technical University in Prague

We present a detailed set of performance comparisons of two state-of-the-art solvers for the application of designing time-delay compensators, an important problem in the field of robust control. Formulating such robust control mechanics as constrained optimization problems often involves objective and constraint functions that are both nonconvex and nonsmooth, both of which present significant challenges to many solvers and their end-users hoping to obtain good solutions to these problems. In our particular engineering task, the main difficulty in the optimization arises in a nonsmooth and nonconvex stability constraint, which states that the infinite spectrum of zeros of the so-called shaper should remain in the open left half-plane. To perform our evaluation, we make use β-relative minimization profiles, recently introduced visualization tools that are particularly suited for benchmarking solvers on nonsmooth, nonconvex, constrained optimization problems. Furthermore, we also introduce new visualization tools, called Global-Local Profiles, which for a given problem and a fixed computational budget, assess the tradeoffs of distributing the budget over few or many starting points, with the former getting more budget per point and latter less. Copyright © 2018, The Authors. All rights reserved.

关键词： Robust control

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Wireless Monitoring, control and Automation in Pulp and Paper Industry 14

Wireless Monitoring, Control and Automation in Pulp and Pape...

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14th IEEE India Council International Conference, INDICON 2017

作者： Jayasri, S.P. Vyshnavi, N. Moorthi, S. Department of Instrumentation and Control Engineering National Institute of Technology Tiruchirappalli620015 India Department of EEE VLSI Systems Research Lab National Institute of Technology Tiruchirappalli620015 India

ISBN: (纸本)9781538643181

This paper describes wireless control and automation of various processes in paper mills using CC3200. Embedded web server is preferred over PC server in case of internet applications based on client/server architecture for its decreasing size, cost and power consumption. CC3200 has an exclusive feature of low power consumption which makes it convenient for use in industries. A user-friendly webpage interface nodered is introduced to the users and system administrators to locally (LAN) or remotely (internet) manage and control the processes. Email alerts are sent to the users in case of faults and intelligent algorithms can be implemented to rectify the faults which improves the efficiency of the system. © 2017 IEEE.

关键词： Electric power utilization

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Numerical and experimental prediction of lamb wave scattering from horizontal notch 56

Numerical and experimental prediction of lamb wave scatterin...

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56th International Scientific Conference on Experimental Stress Analysis, EAN 2018

作者： Šofer, Michal Ferfecki, Petr Fusek, Martin Šofer, Pavel Ličková, Dagmar Department of Applied Mechanics Faculty of Mechanical Engineering VŠB- TU Ostrava 17. listopadu 15/2172 Ostrava-Poruba708 33 Czech Republic IT4Innovations National Supercomputing Center VŠB-Technical University of Ostrava Studentská 6231/1B Ostrava-Poruba708 33 Czech Republic Department of Control Systems and Instrumentation Faculty of Mechanical Engineering VŠB- TU Ostrava 17. listopadu 15/2172 Ostrava-Poruba708 33 Czech Republic

ISBN: (纸本)9788027040629

The presented paper deals with the topic of experimental and numerical prediction of energy transmission and reflection coefficients in the case of Lamb wave scattering on a two-millimetre deep and two-millimetre wide horizontal notch milled in a three-millimetre thick aluminium sheet. The paper contains the description of the experimental and numerical approaches, which were used for obtaining the above-mentioned coefficients. Great emphasis is also placed on the mutual comparison of results between these approaches as well as clarification of non-compliance of the results for particular Lamb wave modes. © Experimental Stress Analysis - 56th International Scientific Conference, EAN 2018 - Conference Proceedings. All rights reserved.

关键词： Surface waves

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Numerical solution of Rayleigh-Lamb frequency equation for real, imaginary and complex wavenumbers 22

Numerical solution of Rayleigh-Lamb frequency equation for r...

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22nd Slovak-Polish Scientific Conference on Machine Modelling and Simulations, MMS 2017

作者： Šofer, Michal Ferfecki, Petr Šofer, Pavel Department of Applied Mechanics Faculty of Mechanical Engineering VŠB-Technical University of Ostrava 17. listopadu 15/2127 Ostrava-Poruba708 33 Czech Republic IT4Innovations National Supercomputing Center VŠB-Technical University of Ostrava Studentská 6231/1B Ostrava-Poruba708 33 Czech Republic Department of Control Systems and Instrumentation Faculty of Mechanical Engineering VŠB-Technical University of Ostrava 17. listopadu 15/2127 Ostrava-Poruba708 33 Czech Republic

Guided waves, especially Lamb waves or shear-horizontal waves, are widely used types of waves for ultrasonic inspection of large structures. Well known property of guided waves is their dispersive character, which means that the propagation velocity of the particular wave mode is not only a function of physical properties of the material, in which the wave propagates or the wavés frequency, but also depends on the geometry of the structure in itself. Dispersion curves provide us the information related to the dependency between the wavenumber and the frequency of the particular mode and can be obtained by a numerical solution of Rayleigh-Lamb frequency equation. A solution of Rayleigh-Lamb frequency equation forms for a given frequency and plate thickness a set of a finite number of real and pure imaginary wavenumbers and an infinite number of complex wavenumbers. Proposed paper presents a complete procedure of how to obtain all three kinds of wavenumbers for a given geometry and frequency interval. The main emphasis is placed on the effectiveness of the procedures, which are used for finding the roots of dispersion equation for all three kinds of wavenumbers. © 2018 The Authors, published by EDP Sciences.

关键词： Surface waves

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Usage of single-chip computers for control MIMO systems

Usage of single-chip computers for control MIMO systems

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International Carpathian control Conference (ICCC)

作者： Jiří Czebe Jaromír Škuta Department of Control Systems and Instrumentation VSB Technical University of Ostrava Ostrava Czech Republic Department of Control Systems and Instrumentation Faculty of Mechanical Engineering VSB Technical University of Ostrava Czech Republic

This paper deals with usage of single-chip computers for controlling MIMO systems. The aim is to design a general control system, which is easy to use and easy to implement for other MIMO systems. The performance of control system is limited by the performance of used MCU (PIC 16F876A) and its peripherals (2×PWM, 8×A/D, MAC, ...). The key tasks of MCU are communication with upper level and implementation of required control action together with data collection. The serial interface provides communication between control system (PC) and MCU. SCADA/HMI system monitors a controlled system. The application is accessible via Internet browser in local area network (LAN).

关键词： Atmospheric modeling MIMO Mathematical model Heating systems Transfer functions Data models

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Bayesian Frequency Domain Identification of LTI systems with OBFs Kernels

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IFAC-PapersOnLine 2017年第1期50卷 6238-6243页

作者： Darwish M.A.H. Lataire J. Tóth R. Control Systems Group Department of Electrical Engineering Eindhoven University of Technology P.O. Box 513 Eindhoven MB 5600 Netherlands Electrical Engineering Department Faculty of Engineering Assiut University Assiut 71515 Egypt Dept. ELEC (Fundamental Electricity and Instrumentation) Vrije Universiteit Brussel Pleinlaan 2 Brussels 1050 Belgium

Regularised Frequency Response Function (FRF) estimation based on Gaussian process regression formulated directly in the frequency-domain has been introduced recently The underlying approach largely depends on the utilised kernel function, which encodes the relevant prior knowledge on the system under consideration. In this paper, we show how to construct a rich class of kernel functions, directly in the frequency-domain, based on Orthonormal Basis Functions (OBFs), which is capable of representing a wide range of dynamical properties, e.g., stability, resonance frequencies, damping, etc, in terms of the poles of the employed basis functions that are treated as hyperparameters to efficiently shape the model class, i.e., the prior in the corresponding Bayesian setting. This class of kernel functions also implicitly guarantees the stability of the estimated FRF. The generating poles of the OBFs are tuned along with other hyperparameters, e.g., noise variance, by maximising the marginal likelihood. Multiple case studies are considered to show the potential of the considered kernels. © 2017

关键词： Frequency-domain Gaussian process regression Kernel functions Orthonormal basis functions Regularisation

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