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An artificial vision solution for reusing discarded parts resulted after a manufacturing process

IOP Conference Series: Materials Science and engineering 2016年第2期145卷

作者： V Cohal A Cohal Tehnical University 'Gh. Asachi' of Iaşi - Romania Faculty of Machine Manufacturing and Industrial Management Department of Machine Manufacturing Technology Blvd. Mangeron No. 59A 700050 Iasi Romania Tehnical University 'Gh. Asachi' of Iaşi - Romania Faculty of Automatic Control and Computer Engineering Department of Automatic Control and Applied Informatics Blvd. Mangeron No. 27 700050 Iasi Romania

The profit of a factory can be improved by reusing the discarded components produced. This paper is based on the case of a manufacturing process where rectangular metallic sheets of different sizes are produced. Using an artificial vision system, the shapes and the sizes of the produced parts can be determined. Those sheets which do not respect the requirements imposed are labeled as discarded. Instead of throwing these parts, a decision algorithm can analyze if another metallic sheet with smaller dimensions can be obtained from these. Two methods of decision are presented in this paper, considering the restriction that the sides of the new sheet has to be parallel with the axis of the coordinate system. The coordinates of each new part obtained from a discarded sheet are computed in order to be delivered to a milling machine. Details about implementing these algorithms (image processing and decision respectively) in the MATLAB environment using Image Processing Toolbox are given.

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The Determination of the Shelf Mass in the Universal Shelving Stacker by Measuring the Frequency Converter Torque Generating Current of the Main Drive

Manufacturing Technology

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Manufacturing Technology 2015年第3期15卷 30-30页

作者： Kollár, Pavol Nikitin, Yuri Straka, Martin Department of Electrical Engineering and Mechatronics Faculty of Electrical Engineering and Informatics Technical university of Kosice Letna 9 Kosice042 00 Slovakia Department of Mechatronic Systems Kalashnikov Izhevsk State Technical University "Mechatronic Systems" Department Izhevsk Russia Logistics Institute of Industry and Transport Faculty of Mining Ecology Process Control and Geotechnology Technical university of Kosice Park Komenskeho 14 Kosice043 84 Slovakia

The correct determination of the shelf mass including content is very important for the proper function of a universal shelf stacker (USS) drives life and construction USS so that these elements were not overloaded. Weighing can be done by direct methods using various sensors tension and compression but also the indirect method, by the torque sensing of current frequency converter, which controls the speed of the three-phase asynchronous motor. This method does not require any additional construction or adaptation or additional sensors or electronic evaluation system power operation. Weighting method of shelf in USS is based on the fact that the torque converter current is proportional to the sum of the weight of the shelf and the extractor and its value provides almost every frequency converter. In contrast to the direct weighing method of the shelf it is obvious economic advantage of this method and the accuracy is sufficient for the operation of USS. Copyright © 2015. Published by Manufacturing Technology. All rights reserved.

关键词： Frequency converters

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Average State Kalman Filters for Large-Scale Stochastic Networked Linear Systems

Average State Kalman Filters for Large-Scale Stochastic Netw...

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European control Conference

作者： Fumiya Watanabe Tomonori Sadamoto Takayuki Ishizaki Jun-ichi Imura Department of Control and Systems Engineering Tokyo Institute of Technology Department of Mechanical and Environmental Informatics Graduate School of Information Science and Engineering Tokyo Institute of Technology

ISBN: (纸本)9781467371605

In this paper, we propose a design method of average state Kalman filters for networked linear systems with stochastic noises. The average state Kalman filter is a low-dimensional estimator capturing the average behavior of systems from a macroscopic point of view. In general, it is nontrivial to find a set of states that captures the average behavior of systems. To overcome this difficulty, using the notion of clustering, we devise a systematic design procedure of average state Kalman filters while determining states that capture the average behavior of systems. Furthermore, deriving a tractable representation of the estimation error system, we derive an estimation error bound for the proposed method in a theoretical way. The efficiency of the proposed method is shown by a power system example in smart grid applications.

关键词： Estimation error Kalman filters Systematics Symmetric matrices Design methodology Power systems Linear systems

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Fast and scalable constrained reference tracking for discrete-time linear systems

Fast and scalable constrained reference tracking for discret...

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European control Conference

作者： Sabin - Constantin Carpiuc Mircea Lazar Veaceslav Spinu Department of Automatic Control and Applied Informatics Technical University "Gheorghe Asachi" of Iasi Department of Electrical Engineering Eindhoven University of Technology

ISBN: (纸本)9781467371605

This paper considers the synthesis of tracking control laws for discrete-time linear systems. A two-step approach that results in a sequence of quadratic contractive sets is proposed. Firstly, the quadratic sets are obtained by maximizing the size of the sets. Then, secondly, a conic partition is employed to construct continuous conewise linear control laws for each quadratic set while optimizing performance. Furthermore, a set-theoretic method is employed to extend the stabilizing law for the tracking control problem. As a result it yields scalable off-line computation of the control law. Moreover, this approach provides stability guarantees and constraints satisfaction. The effectiveness of the approach is demonstrated using an illustrative example.

关键词： control law Scalability tracking control constraint satisfaction problems line computation Fasting Linear system discrete-time Quadratic discrete time systems SETTING off-line computation

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Extremum seeking control for an anaerobic digestion process

Extremum seeking control for an anaerobic digestion process

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Sergiu Caraman George Ifrim Emil Ceangă Marian Barbu Mariana Titica Radu-Emil Precup Department of Automatic Control and Electrical Engineering “Dunarea de Jos” University of Galati Galati Romania Universite de Nantes CNRS GEPEA UMR-CNR 6144 Bd. de l'Universite France Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania

The paper deals with the optimal control (extremum seeking algorithm) of an anaerobic digestion process. It uses a simplified version of the anaerobic digester model. Three cases of optimization criteria are considered taking into account the quality variable of the process: 1. the methane quantity in gaseous form, 2. the level of pollutants (it is expressed as the difference between the influent substrate and the substrate quantities accumulated in the digester) and 3. an aggregated quality variable resulted from the combination of the first two criteria. The analysis of anaerobic digestion process static characteristics shows that each characteristic reaches a point of maximum. The extremum seeking algorithm aims to keep the operating point in this point of maximum. The simulation results confirm the good behaviour of the extremum seeking algorithm.

关键词： Mathematical model Process control Biological system modeling Microorganisms Carbon dioxide Optimization Substrates

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High PSRR and accuracy receiver active equalizer

High PSRR and accuracy receiver active equalizer

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2014 IEEE 34th International Scientific Conference on Electronics and Nanotechnology, ELNANO 2014

作者： Vazgen, Sh. Melikyan Arthur, S. Sahakyan Dingchyan Hayk, H. Nazeli, V. Melikyan Ani, L. Aleksanyan Armen, S. Sahakyan Vahe, S. Babayan Department of Microelectronics Circuits and Systems State Engineering University of Armenia Yerevan Armenia Department of Control and Informatics in Technical Systems State Engineering University of Armenia Yerevan Armenia

ISBN: (纸本)9781479945801

High accuracy equalization and high power supply rejection ratio equalizer in the receiver of a high-speed serial link presented. To validate the proposed architecture, conducted experiments, for examples, with various injected faults, for which the conventional approach of examining the eye opening at the output of the equalizer results. Proposed equalizer have supply noise with 35% higher rejection ratio than USB specification required and hence this equalization mechanism can be used in the special input/output circuits of Universal Serial Bus (USB) and some other protocols as well. © 2014 IEEE.

关键词： Equalizers

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Interval type-2 fuzzy-model-based control design for time-delay systems under imperfect premise matching

Interval type-2 fuzzy-model-based control design for time-de...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Yuandi Li H. K. Lam Lixian Zhang Hongyi Li Fucai Liu Shun-Hung Tsai Department of Informatics King's College London United Kingdom Institute of Electrical Engineering Yanshan University Qinhuangdao China Research Center of Intelligent Control and Systems Harbin Institute of Technology Harbin China College of Engineering Bohai University Jinzhou China Graduate Institute of Automation Technology National Taipei University of Technology Taipei Taiwan

In this paper, the problems of stabilization for interval type-2 fuzzy systems with time-varying delay and parameter uncertainties are investigated. The objective is to design an interval type-2 fuzzy controller such that the closed-loop control system is asymptotically stable. The conditions for the existence of such a controller are delay dependent and membership function dependent in terms of linear matrix inequalities (LMIs). Based on a basic lemma, we formulate and solve the problem with more flexibility due to imperfect premise matching that the number of rules and premise membership functions are not necessary the same between the interval type-2 fuzzy model and interval type-2 fuzzy controller. A systematic approach making use of the information embedded in the lower and upper membership functions is employed to facilitate the stability analysis. A numerical example indicates the effectiveness of the derived results.

关键词： Gold

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Have your cake in parallel and eat it sequentially too!: Semantically sequential, parallel execution of multiprocessor programs 26

Have your cake in parallel and eat it sequentially too!: Sem...

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26th IEEE Hot Chips Symposium, HCS 2014

作者： Gupta, Gagan Department of Informatics Aristotle University of Thessaloniki Thessaloniki Greece Control and Energy Management Lab (CEM Lab) Sfax Engineering School Sfax Tunisia

ISBN: (纸本)9781467388832

关键词： Multiprocessor Pastry cakes parallel execution Food Intake Parallel Lines Cake Dosage Form Sequential

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Online deformation of optimal trajectories for constrained nonprehensile manipulation

Online deformation of optimal trajectories for constrained n...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Alexander Pekarovskiy Thomas Nierhoff Jochen Schenek Yoshihiko Nakamura Sandra Hirche Martin Buss TUM Institute for Advanced Study Technische Universität München Garching Germany Chair of Automatic Control Engineering Technische Universität München Munich Germany Technische Universitat Munchen Munchen Bayern DE Department of Mechano-Informatics University of Tokyo Tokyo Japan

ISBN: (纸本)9781479969241

This paper discusses an online dynamic motion generation scheme for nonprehensile object manipulation by using a set of predefined motions and a trajectory deformation algorithm capable of incorporating positional and velocity boundary constraints. By creating optimal trajectories offline and deforming them online, computational complexity during execution is reduced considerably. As tight convex hulls of the deformed trajectories can be found, possible obstacles or workspace boundaries can be circumnavigated precisely without collision. The approach is verified through experiments on an inclined planar air-table for volleyball scenario using two 3-DoF robots.

关键词： Trajectory Collision avoidance Splines (mathematics) Acceleration End effectors Mathematical model

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Output control approach for delayed linear systems with adaptive rejection of multiharmonic disturbance 19

Output control approach for delayed linear systems with adap...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Pyrkin, Anton A. Bobtsov, Alexey A. Nikiforov, Vladimir O. Vedyakov, Alexey A. Kolyubin, Sergey A. Borisov, Oleg I. Department of Control Systems and Informatics ITMO University St.-Petersburg Russia Laboratory Control of Complex Systems Institute for Problems of Mechanical Engineering St.-Petersburg Russia Department of Engineering Cybernetics Norwegian University of Science and Technology TrondheimNO-7491 Norway

ISBN: (纸本)9783902823625

We present a new output control approach for a linear plant with input delay and an unknown multiharmonic disturbance acting on the input and the output. To solve this problem, we combine the well-known predictor feedback approach with the state observer and adaptive scheme that identifies the frequency of the disturbance. Compared to the existing approaches, the structure of our adaptive scheme is the simplest and the results apply to plants that are unstable, non-minimum phase, and have an arbitrary relative degree. © IFAC.

关键词： Adaptive control systems

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