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Implementing Industry 4.0 in Discrete Manufacturing: Options and Drawbacks

IFAC-PapersOnLine 2018年第6期51卷 473-478页

作者： Arm, J. Zezulka, F. Bradac, Z. Marcon, P. Kaczmarczyk, V. Benesl, T. Schroeder, T. Department of Control and Instrumentation Faculty of Electrical Engineering and Communication Brno University of Technology Brno Czech Republic Institute for Automation Engineering Faculty of Electrical Engineering and Information Technology Otto von Guericke University Magdeburg Germany

The Industry 4.0 concept embodies a topic widely discussed during specialized meetings and tutorials. Originally, this approach was interpreted as an attempt to shift industrial processes towards establishing the fully digitized smart factory; at present, however, it already exerts an influence on many other fields and disciplines. In this article, the concept is described from the perspective of discrete manufacturing. The implementation possibilities are outlined, with options such as the Asset Administrative Shell or Consumer-Provider model introduced in greater detail. We also mention some drawbacks to implementing job shop scheduling as provided by the latter option; these disadvantages include, for instance, the deadlock situation. Some methods to solve the problem are demonstrated to facilitate well-balanced presentation. A job shop scheduling algorithm using the AAS is also addressed, and a new evaluation function is proposed. © 2018

关键词： Job shop scheduling Industry 4.0 Optimization Scheduling algorithms deadlock decentralized Discrete manufacturing Distributed control Evaluation function Industrial processs Manufacturing plant Well balanced

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A dynamic co-evolution compact genetic algorithm for E/T problem

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IFAC-PapersOnLine 2015年第28期48卷 1439-1443页

作者： Han, Zhonghua Zhu, Yihang Lin, Shuo Faculty of Information and Control Engineering Shenyang Jianzhu University Department of Digital Factory Shenyang Institute of Automation Key Laboratory of networked control system Shenyang China Faculty of Information and Control Engineering Shenyang Jianzhu University Shenyang China

In this paper, a dynamic co-evolution compact genetic algorithm (DCCGA) is proposed for flexible flow shop scheduling problem (FFSP) to minimize the total earliness and tardiness (E/T) penalties. In this new algorithm, a dynamic co-evolution mechanism containing two probabilistic models and a best individual inheritance strategy are integrated into the compact genetic algorithm (CGA). For improving the stability of the evolutionary trend in the evolution processes, the diversity of evolution trend and the convergence speed. Lastly, the experimental results show that, DCCGA outperforms CGA by 11.74% on the problem we study. © 2015

关键词： Genetic algorithms Machine shop practice Co evolution Compact genetic algorithm Earliness tardiness Flexible flow shop Probabilistic models

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A NEW TRAJECTORY REVERSING METHOD FOR THE ESTIMATION OF ASYMPTOTIC STABILITY REGIONS

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INTERNATIONAL JOURNAL OF control 1995年第4期61卷 917-932页

作者： NOLDUS, E LOCCUFIER, M University of Ghent Faculty of Applied Sciences Department of Control Engineering and Automation Technologiepark-Zwijnaarde 9 B-9052 Gent-Zwijnaarde Belgium.

A new method is presented for estimating regions of asymptotic stability for autonomous nonlinear systems. The method applies to systems that can be proven to be non-oscillatory, using a suitable Lyapunov technique. It is especially effective for second-order systems that possess several equilibrium states for which the regions of attraction must be found. The determination of the regions of asymptotic stability requires the explicit computation of a Lyapunov function and the determination by backward numerical integration of a limited number of trajectories. The obtained estimates are close approximations of the exact regions of asymptotic stability of the system's stable equilibria.

关键词： System stability

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Ontology-based design pattern recognition

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12th International Conference on Knowledge-Based Intelligent Information and engineering Systems

作者： Kirasic, Damir Basch, Danko Information Support Center University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Faculty of Electrical Engineering and Computing

ISBN: (纸本)9783540855620

This paper presents ontlology-based architecture for pattern recognition in the context of static source code analysis. The proposed system has three subsystems: parser, OWL ontologies and analyser. The parser subsystem translates the input coded to AST that is constructed as an XML tree. The OWL ontologies define code patterns and general programming concepts. The analyser subsystem constructs instances of the input code as ontology individuals and asks the reasoner to classify them. The experience gained in the implementation of the proposed system and some practical issues are discussed. The recognition system successfully integrates the knowledge representation field and static code analysis. resulting in greater flexibility of the recognition system.

关键词： knowledge-based system ontology-based system static code analysis description logics OWL application formal pattern definition

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Large-scale assembly of Cu/CuO nanowires for nano-electronic device fabrication

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Science China(Technological Sciences) 2014年第4期57卷 734-737页

作者： XU Ke TIAN XiaoJun YU HaiBo YANG Yang ZHOU Lei LIU LianQing State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Information & Control Engineering Faculty Shenyang Jianzhu University

To improve the efficiency of nano-electronic device fabrication, a new method named floating electrical potential assembly is proposed to realize large-scale assembly of Cu/CuO nanowires, The simulation of floating electrical potential distribution on the micro-electrode chip is performed by COMSOL software, and the simulation result shows that the coupled electrical poten- tial on the floating drain electrodes is very close to the original electrical potential applied on the gate electrode, whicb means that the method can provide di-electrophoresis （DEP） force for all the electrode pairs at one time, thus realizing large-scale as- sembly at one time. With Cu/CuO nanowires well dispersed and micro-electrode chip fabrication, nanowires assembly experiments are performed and the experimental results show that Cu/CuO nanowires are assembled at hundreds of micro-electrodes pairs at one time, and the success rate of nanowires assembly also reaches 90%.

关键词： large-scale assembly Cu/CuO nanowires floating potential di-electrophoresis

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IoT System for Real-Time Water Quality Measurement and Data Visualization 12

IoT System for Real-Time Water Quality Measurement and Data ...

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12th Mediterranean Conference on Embedded Computing, MECO 2023

作者： Koleva, Radmila Zaev, Emil Babunski, Darko Rath, Gerhard Ninevski, Dimitar Faculty of Mechanical Engineering Department of Hydraulic Engineering and Automation Skopje1000 Macedonia University of Leoben MUL Chair of Automation Leoben8700 Austria

ISBN: (纸本)9798350322910

A prototype of a cheap IoT system for real-time monitoring of river water quality has been developed. The system consists of monitoring stations and appropriate presentation devices (computer, phone, or similar). Each monitoring station has a possibility for real-time measurement of 4 parameters: temperature, pH, turbidity, and dissolved oxygen. They are measured through probes submerged directly in the water. The probes are connected to the Raspberry Pi 3 model B, and through wi-fi communication, the measured data are transferred to the data storage cloud and then transferred to the visualization platform. The collected data in the IoT system is calculated and presented in real-time. Using real-time we can have instant information on the water quality and an alarm for possible contamination. Collected data on the remote server station can be used for deeper water quality analysis. © 2023 IEEE.

关键词： Water quality

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Lumped Parameter Mass Flow Rate and Pressure control Characteristics Model for High-Speed Pneumatic PWM on/off Valve

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Journal of Donghua University(English Edition) 2014年第3期31卷 293-303页

作者：向忠胡旭东刘昊汝晶炜 Faculty of Mechanical Engineering & Automation Zhejiang Sci-Tech University State Key Laboratory of Fluid Power Transmission and Control Zhejiang University

Aiming at solving the problem of strong coupling characteristic of the key parameters of high-speed pneumatic pulse width modulation( PWM) on / off valve, a general lumped parameter mathematical model based on the valves time periods was well developed. With this model,the mass flow rate and dynamic pressure characteristics of constant volumes controlled by high-speed pneumatic PWM on /off valves was well described. A variable flow rate coefficient model was proposed to substitute for the constant one used in most of the prior works to investigate PWM on /off valves' dynamical pressure response, and a formula for disclosing the inherent relationship among the PWM command signal,static mass flow rate,and sonic conductance of the valve was newly ***,an extensive set of analytical experimental comparisons were implemented to verify the validity of the proposed mathematica model. With the proposed model, PWM on /off valves' characteristics,such as mass flow rate,step pressure response of the valve control system,mean pressure and ripple amplitude,not only in the linear range,but also in the nonlinear range can be wel predicted; Good agreement between measured and calculated results was obtained,which proved that the model is helpful for designing a control strategy in a closed loop control system.

关键词： lumped parameter model pneumatic on/off valve pulse width modulation(PWM) mass flow rate pressure characteristic

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Strong detectability and unknown input observer design for a class of networks of systems

Strong detectability and unknown input observer design for a...

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作者： Schaum, A. Chair of Automatic Control Faculty of Engineering Kiel University Kiel24143 Germany

Detectability is the key property which underlies the design of any convergent observer. In this paper a method for analyzing the detectability for a class of networks of systems with unknown inputs is presented, exploiting the definition of indistinguishable trajectories and the structure of the underlying network graph. This analysis yields sufficient conditions for the sensor location in order to ensure the system's strong detectability in presence of unknown inputs. Based on this analysis a simple (reduced order) unknown-input observer with explicit convergence conditions in terms of system parameters and the sensor locations is proposed and tested in numerical simulations for an illustrative case example of a Markov-chain based epidemic spreading model in a scale-free network with N = 103 nodes. © 2018

关键词： Location

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Autonomous Climbing Robot for Tank Inspection 3rd

Autonomous Climbing Robot for Tank Inspection

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3rd World Conference on Technology, Innovation and Entrepreneurship, WOCTINE 2019

作者： Acar, Özgür Yasąr, Claudia F. Control and Automation Engineering Faculty of Electrical and Electronics Engineering Yildiz Technical University Istanbul34220 Turkey

A detailed design of mechanisms is presented, along with the required electromagnetic system to attach the robot to the tank's wall. This is a novel mechanical design in which the robotic wheels rotate changing the instantaneous center of rotation. The robot mechanics is designed and simulated using Solidworks. The proposed electromagnetic system has to provide the necessary currents to control magnetic forces to be strong enough to attach the robot to the wall. However, because of the electromagnetic forces the control positioning method has to consider the strong Coulomb friction that appears against wheels movement. The sensor and acquisition system for navigation and control are also detailed. An inspection system has been proposed based on client/server architecture. Autonomous tracking and a mapping system powered by IMU sensor fusion is proposed. This design is suitable to be used along with the robot motion positioning strategy and, especially, the system must be robust to the disturbances and noise. The robot runs a server application and a remote PC is the client. The robot configuration has been developed with the capability of climbing up steel walls and navigating welding lines. The remote inspection system has been illustrated. A sensorial system and data fusion strategy to estimate the absolute robot position have been proposed. In order to track the desired trajectories, the robot's kinematics is described. Some simulations of the position control of the wheels and the complete control for the tracking performance were simulated using Matlab/Simulink. This robotic system has demonstrated the capability to track an accurate trajectory given by the defined kinematic equations. © 2019 The Authors. Published by Elsevier B.V.

关键词： Inspection

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Sparse Least Square Support Vector Machines based on Random Entropy 36

Sparse Least Square Support Vector Machines based on Random ...

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第36届中国控制会议

作者： Wenlu Ma Han Liu Faculty of Automation and Information Engineering Xi'an University of Technology Shaanxi Key Lab. of Complex System Control and Intelligent Information Processing Faculty of Automation and Information EngineeringXi’an University of Technology

ISBN: (纸本)9781538629185

Least squares support vector machines(LSSVM) has a good performance in small data samples, but can't solve the large-scale sample problems. In this paper, large data set sparse least squares support vector machines model based on stochastic entropy is proposed, and it can be applied to large-scale data samples. Firstly, the large-scale data set is divided into several subsets. Then the entropy method is used to the sparse samples in each subset. Finally, we use sparse samples sets as training samples, and use least squares support vector machine algorithm to train. The results show that the sparse least squares support vector machine model based on entropy can effectively solve the problem of large-scale data.

关键词： Sparsity LSSVM Large-scale data Random Entropy

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