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Multicast dataset synchronization and agent negotiation in distributed manufacturing control systems

IFAC-PapersOnLine 2015年第3期48卷 1087-1092页

作者： Morariu, Octavian Morariu, Cristina Borangiu, Theodor Raileanu, Silviu University Politehnica of Bucharest Dept. of Automation and Applied Informatics Romania LoudTroopers International Romania

Multi agent systems represent an elegant approach for the control architecture of manufacturing systems. Distributed control architectures have the potential to achieve greater flexibility by being capable of local decision making based on real time reasoning. One of the main challenges of these distributed architectures is represented by the capability to synchronize the production data across all execution points in a reliable and consistent fashion. In this context, this paper aims to resolve the problems associated with real time production data synchronization in distributed multi-agent control systems by proposing a common dataset synchronized across all agent entities using multicast network communication. On top of this common dataset approach, an agent negotiation mechanism is proposed that addresses the operation sequencing and resource allocation in decentralized operation model. The pilot implementation is using JADE multi agent platform and JGroups for real time data synchronization and NetLogo for abstract representation of the simulation system. Experimental results gathered from the pilot implementation are discussed. © 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Multi agent systems

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Cost analysis for service-oriented holonic manufacturing system design

Cost analysis for service-oriented holonic manufacturing sys...

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14th IFAC Symposium on Information Control Problems in Manufacturing, INCOM'12

作者： Morariu, Cristina Morariu, Octavian Borangiu, Theodor University Politehnica of Bucharest Dept. of Automation and Applied Informatics Romania

ISBN: (纸本)9783902661982

This paper presents a formal methodology to perform a cost analysis for the customer order management (COM) process in the context of holonic manufacturing systems. The business process described in the paper, centred on COM, interconnects reference architecture with several enhancements that help in the mapping of the financial relevant activities. The process is analysed from two perspectives, first to show how the resource break-down rate in the HMES influences the overall profit and secondly to show the relationship between the percentage of products that fail the quality assurance test and the overall profit. The process was simulated using a BPM tool and the results are discussed. © 2012 IFAC.

关键词： Profitability

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Automatic generation of 3D machining surfaces with tool compensation from graylevel image models

Automatic generation of 3D machining surfaces with tool comp...

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作者： Borangiu, Theodor Dogar, Anamaria Dumitrache, Alexandru University Politehnica of Bucharest Dept. of Automation and Applied Informatics Romania

ISBN: (纸本)9783902661234

The paper presents a theoretical approach and implementing issue for automatic CNC toolpath generation using morphological image processing operators applied to dept. map images. This method allows computing cutter compensation for various end mill shapes. Roughing is made using zigzag cuts with a flat end mill, and finishing is done with isoparametric toolpaths using various rounded end mills. An AI-based algorithm and image processing software create CNC machining instructions from dept. map image models. The paper also describes a graphical user interface and includes experimental results. © 2007 IFAC.

关键词： Computer aided design

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Customer order management in service oriented holonic manufacturing

Customer order management in service oriented holonic manufa...

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14th IFAC Symposium on Information Control Problems in Manufacturing, INCOM'12

作者： Morariu, Cristina Morariu, Octavian Borangiu, Theodor University Politehnica of Bucharest Dept. of Automation and Applied Informatics Romania

ISBN: (纸本)9783902661982

One of the most important problems when considering the design of manufacturing systems based on SOA paradigms is the integration of shop floor activities in the business processes at enterprise level. This paper presents the design and implementation of a web service abstraction layer for holonic manufacturing systems that allow business process orchestration of customer order management module. It focuses on enhancements implemented for the NetLogo tool by adding both incoming and outgoing Web Services capabilities and discusses the technical solutions for this integration. An example is being provided for the integration and testing of a business process against the considered environment. © 2012 IFAC.

关键词： Web services

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Customer order management in service oriented holonic manufacturing

Customer order management in service oriented holonic manufa...

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作者： Morariu, Cristina Morariu, Octavian Borangiu, Theodor University Politehnica of Bucharest Dept. of Automation and Applied Informatics Romania

One of the most important problems when considering the design of manufacturing systems based on SOA paradigms is the integration of shop floor devices in the business processes at the enterprise level. This paper presents the design and implementation of the Customer Order Management (COM) module based on SOA architecture in the context of holonic manufacturing systems. The COM module is integrating with SOA enabled shop floor devices using industry standards. The implementation leverages a multi agent system suited for industrial applications integrated in a SOA environment capable of dynamic BPEL workflow generation and execution. The prototype consists in a SCA application for core COM module functionality and an extension for NetLogo MAS platform for SOA integration. The COM module interacts with the MES layer using real time events handled by the BPEL process implementation in the execution stage. A web based portal frontend for the COM module has been developed to allow real time tracking of customer orders, providing data about product batch execution and individual progress of each product on the production line. © 2013 Elsevier B.V.

关键词： Web services

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Hybrid fuzzy controllers for non-minimum phase systems

Hybrid fuzzy controllers for non-minimum phase systems

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7th IEEE International Symposium on applied Computational Intelligence and informatics, SACI 2012

作者： Precup, Radu-Emil Preitl, Stefan Stînean, Alexandra-Iulia Dragoş, Claudia-Adina Râdac, Mircea-Bogdan Dept. of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania

ISBN: (纸本)9781467310116

The class of non-minimum phase systems modeled by transfer functions with "unstable" zeros is considered as a controlled plant in control systems. The stabilization and control of this class of systems is difficult stabilizing because of the unusual behavior in both time and frequency domains. The paper shows that fuzzy control is a successful control solution for this class of systems. With this regard, the paper proposes two hybrid fuzzy controllers of Takagi-Sugeno type that cope with the class of second-order non-minimum phase systems with a "right half plane zero". ©2012 IEEE.

关键词： Fuzzy control

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Hybrid fuzzy control solutions for Brushless DC drives with variable moment of inertia

Hybrid fuzzy control solutions for Brushless DC drives with ...

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2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and informatics, SISY 2012

作者： Stînean, Alexandra-Iulia Preitl, Stefan Precup, Radu-Emil Dragoş, Claudia-Adina RǍdac, Mircea-Bogdan Dept. of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania

ISBN: (纸本)9781467347518

This paper proposes four hybrid Takagi-Sugeno fuzzy controllers which consist of two hybrid PI Neuro-Fuzzy Controllers and two Adaptive Sliding Mode Fuzzy Controllers, for speed and position control of Brushless Direct Current motor (BLDC-m) drives. Simplified models of BLDC-m drives are derived and used in the new controller design;these models are characterized by second-order transfer functions with variable parameters and with or without an integral component. The proposed controllers and systematic design methodologies are briefly presented and some particular approaches are highlighted. The control structures exhibit important robustness properties proved by simulation results. The design methodologies guarantee the system stability and offer consistent performance under model uncertainties. Simulation-based comparisons illustrate the efficiency of the controllers. © 2012 IEEE.

关键词： Position control

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Implementation of hardware-in-the-loop system for drum-boiler-turbine decoupled multivariable control

Implementation of hardware-in-the-loop system for drum-boile...

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6th IEEE International Symposium on applied Computational Intelligence and informatics, SACI 2011

作者： Iacob, Mihai Andreescu, Gheorghe-Daniel Politehnica University of Timisoara Dept. of Automation and Applied Informatics Timisoara Romania

ISBN: (纸本)9781424491094

This paper focuses on developing a hardware-in-the-loop (HIL) system for a boiler-turbine process, employing decoupled adaptive control based on gain scheduling technique. The used model is a 33 non-linear strongly coupled system adapted to fit a real thermal power plant of 16 MW. The main purpose of this work lies in implementing, comparing and validating the proposed HIL method over classic simulation methods applied on the present complex structure, rather than analyzing control system performance (which was studied in a previous paper). The proposed investigation contains two sections for integration: i) simulation environment for the boiler-turbine process carried out using Labview running on a PC under a general purpose operating system, and ii) control algorithms implemented on industrial real-time Siemens programmable logic controller (PLC). The control algorithms are made in two different ways: by Labview Virtual Instruments (VI) on PC, and by ladder-logic program on PLC, for comparison purpose. Data exchange between parties is provided by an OLE for process control server (OPC Server) at the software level, and by an Industrial Ethernet bus at the physical level. The synchronization between PLC and PC, which does not have a real-time operating system, was a challenge. Test results show that the proposed HIL method is validated even in these conditions. © 2011 IEEE.

关键词： Electronic data interchange

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Extensions in Symmetrical Optimum design method. Advantages, applications and perspectives

Extensions in Symmetrical Optimum design method. Advantages,...

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6th IEEE International Symposium on applied Computational Intelligence and informatics, SACI 2011

作者： Preitl, Stefan Precup, Radu-Emil Stinean, Alexandra-Iulia Dragos, Claudia-Adina Radac, Mircea-Bogdan Dept. of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania

ISBN: (纸本)9781424491094

The paper deals with theoretical and applicative aspects concerning two extensions of the Symmetrical Optimum method (SO-m) for controller tuning in speed and position control of mechatronics systems. The methods, introduced by the authors and called Extended form of the Symmetrical Optimum method (ESO-m) and Double parameterization of the Symmetrical Optimum method (2p-SO-m), are briefly presented and some approaches regarding the methods are highlighted. Due to the applicability of the methods in the field of mechatronics applications (speed and positioning control of rapid plants), the presented aspects are of permanent actuality. © 2011 IEEE.

关键词： Position control

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2-DOF control solutions for BLDC-m drives

2-DOF control solutions for BLDC-m drives

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9th International Symposium on Intelligent Systems and informatics, SISY 2011

ISBN: (纸本)9781457719745

The paper gives 2-DOF speed control solutions for BLDC-m drives with focus on design methodologies for servo systems. A classical 2-DOF structure and two variants of 2-DOF PI(D) control structures are briefly presented and some approaches regarding the methods are highlighted. A comparative study and case study with digital simulation results are included to exemplify the design methodologies. © 2011 IEEE.

关键词： Brushless DC motors

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