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International Conference on Computational Cybernetics (ICCC)

作者： L. Ferariu B. Burlacu Department of Automatic Control and Applied Informatics Gheorghe Asachi Technical University of Iasi Iasi Romania

ISBN: (纸本)9781424474325;9781424474332

This paper presents a novel approach devoted to the design of feed forward hybrid neural models. Graph genetic programming techniques are used to provide a flexible construction of partially interconnected neural structures with heterogeneous layers built as combinations of local and global neurons. By exploiting the inner modularity and the parallelism of the neural architectures, the approach suggests the encryption of the potential mathematical models as directed acyclic graphs and defines a minimally sufficient set of functions which guarantees that any combination of primitives encodes a valid neural model. The exploration capabilities of the algorithm are heightened by means of customized crossovers and mutations, which act both at the structural and the parametric level of the encrypted individuals, for producing offspring compliant with the neural networks' formalism. As the parameters of the models become the parameters of the primitive functions, the genetic operators are extended to manage the inner configuration of the functional nodes in the involved hierarchical individuals. The applicability of the proposed design algorithm is discussed on the identification of an industrial nonlinear plant.

关键词： Genetic programming Neural networks Cryptography Algorithm design and analysis Network topology Neurons Parallel processing Mathematical model Genetic mutations Genetic algorithms

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An FPGA implementation of a brushless DC motor speed controller

An FPGA implementation of a brushless DC motor speed control...

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International Symposium for Design and Technology of Electronics Packages (SIITME)

作者： Bogdan Alecsa Alexandru Onea Automatic Control and Applied Informatics Department Gheorghe Asachi Technical University of Iasi Iasi Romania

The spreading of brushless DC (BLDC) motors has imposed the need for efficient and low cost motor control drives. In this paper, a low cost digital controller is presented. For experimental testing, the controller is implemented inside a field programmable gate array (FPGA) device. The developed design is validated in a modular fashion by logic simulation and experimental results are provided. The main contribution is the presented controller design methodology for FPGA implementation.

关键词： Field programmable gate arrays Synchronous motors Pulse width modulation Commutation Radiation detectors DC motors Regulators

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Some issues on holonic systems analysis, design and implementation

Some issues on holonic systems analysis, design and implemen...

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IEEE International Workshop on Robotics in Alpe-Adria-Danube Region (RAAD)

作者： D. Panescu C. Pascal Department of Automatic Control and Applied Informatics Gheorghe Asachi Technical University of Iasi Iasi Romania

This contribution reveals some problems concerning the use of holonic manufacturing systems. These regard both the design and implementation phases and they can be discovered since the system analysis. A new Petri net based model is proposed for the holonic system organized according to the Contract Net Protocol coordination scheme. Certain weaknesses are discovered both at the model and implementation levels and some solutions are sketched. These are illustrated with a case from an experimental manufacturing environment that could exemplify the problems regarding the resource sharing and holons' coordination.

关键词： Manufacturing systems Protocols Multiagent systems control systems Contracts Robot kinematics Robotics and automation informatics Resource management Guidelines

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Cascade based control of a drivetrain with backlash

Cascade based control of a drivetrain with backlash

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International Conference on Optimization of Electrical and Electronic Equipment, OPTIM

作者： Constantin - Florin Caruntu Andreea - Elena Balau Corneliu Lazar Department of Automatic Control and Applied Informatics Gheorghe Asachi Technical University of Iasi Iasi Romania

Reducing fuel consumption, lowering emissions and improving driveability represent the main interests nowadays in automotive research centres from both academic and industry fields. The purpose is to develop more complex and accurate models for the automotive drivetrain in order to design and to apply different control strategies. In this paper, starting from the relations that describe the dynamical behaviour for each subsystem of an automotive powertrain, a nonlinear state-space model for a drivetrain with backlash was developed. The model was then implemented in Matlab/Simulink and a PID cascade controller was proposed in order to maintain a desired wheel speed trajectory.

关键词： Mathematical model Mechanical power transmission Automotive engineering Wheels Engines Fuels Three-term control Torque control Gears Shafts

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Elitist multiobjective nonlinear systems identification with insular evolution and diversity preservation

Elitist multiobjective nonlinear systems identification with...

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Congress on Evolutionary Computation

作者： Alina Patelli Lavinia Ferariu Department of Automatic Control and Applied Informatics Gheorghe Asachi Technical University of Iasi Iasi Romania

The paper suggests a customized elite based genetic programming technique for the identification of complex nonlinear systems. The models generated by the proposed method are nonlinear, linear in parameters, as the universal approximation capacities of such a mathematical formalism have been rigorously proven. To better exploit the models' parameter wise linearity, the authors propose a memetic approach that combines the stochastic structural transitions caused by enhanced genetic operators, with a deterministic parameter computation routine based on QR decomposition. This symbiosis assures a quasi simultaneous model structure and parameters selection and heightened search space exploration capabilities. To better fit the requirements of systems identification, the problem is formulated as a multiobjective optimization one, employing accuracy and parsimony assessment criteria. Two elitist evolutionary procedures have been implemented to obtain a solution, each featuring original contributions: the first one employs a dynamic clustering mechanism aimed at encouraging specific solutions of interest for the problem at hand, whilst the second is oriented towards maintaining population diversity by means of similarity analysis. The practical efficiency of the described methods is demonstrated relative to a multivariable test system with delayed inputs and a complex industrial plant.

关键词： Mathematical model Genetics Algorithm design and analysis Materials Computational modeling Accuracy Optimization

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State-space Model of an Electro-Hydraulic Actuated Wet Clutch

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IFAC Proceedings Volumes 2010年第7期43卷 506-511页

作者： A.E. Balau C. Lazar Department of Automatic Control and Applied Informatics “Gheorghe Asachi” Technical University of Iasi Str. Prof.Dr.docent Dimitrie Mangeron nr. 27 700050 Romania

Automotive engineers are continuously exploring various transmission technologies to increase vehicle performance, fuel economy and safety. The most common control devices inside the transmission are hydraulic actuated clutches. In this paper a state-space model for a wet clutch actuated by an electro-hydraulic valve used by Volkswagen for automatic transmission is presented. The developed model was implemented in Matlab-Simulink and was validated against the data obtained from a test bench provided by Continental Automotive Romania. The simulations are very similar to the experimental data proving that the modeling approach is suitable to this kind of clutch actuated by an electro-hydraulic pressure reducing valve.

关键词： Wet Clutch Hydraulic Actuator Dynamic Modeling

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Networked Predictive control Strategy for an Electro-Hydraulic Actuated Wet Clutch

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IFAC Proceedings Volumes 2010年第7期43卷 419-424页

作者： C.F. Caruntu A.E. Balau C. Lazar Department of Automatic Control and Applied Informatics “Gheorghe Asachi” Technical University of Iasi Str. Prof. dr. doc. Dimitrie Mangeron nr. 27 700050 Romania

A key component of the automotive industry is represented by clutch control technology, a central element in gear shifting, playing an important role in assuring improved safety, drivability, comfort and fuel economy. Yet, in modern vehicles, control signals and sensors measurements are exchanged by control system components using a network based type of communication. In this paper a new Networked Predictive control Strategy is proposed in order to decrease the influence of the variable time delay induced in the NCS on the control performance of the electro-hydraulic actuated wet clutch. The performances of the proposed method are demonstrated by simulation results and corresponding comparisons prove the significance of this method.

关键词： Wet Clutch control Predictive Strategy Networked control System Time-Varying Delay

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On the design and implementation of holonic manufacturing systems

On the design and implementation of holonic manufacturing sy...

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2009 WRI World Congress on Computer Science and Information Engineering, CSIE 2009

作者： Panescu, Doru Sutu, Marius Pascal, Carlos Department of Automatic Control and Applied Informatics Technical University of Iasi Romania

ISBN: (纸本)9780769535074

Some points regarding the design and implementation of holonic manufacturing systems are presented. As the holonic approach supposes a distributed architecture regarding both planning and execution, certain methods and techniques of multi-agent systems can be used. These need specific adaptations, and the paper is focused on describing how the planning solution is conceived in order to obtain the proper coordination in the holonic system and the way communication can be solved using a CORBA based service oriented architecture. The proposed scheme is exemplified in the case of the resource holons' materialization. The developed architecture was tested on a manufacturing system with real industrial equipment. The respective system and the considered manufacturing scenarios constitute a valuable testbed for the validation of the holonic method. © 2008 IEEE.

关键词： Common object request broker architecture (CORBA)

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An FPGA implementation of the time domain deadbeat algorithm for control applications

An FPGA implementation of the time domain deadbeat algorithm...

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2009 NORCHIP

作者： Alecsa, Bogdan Claudiu Onea, Alexandru Automatic Control and Applied Informatics Department Technical University Gh. Asachi Iasi Romania

ISBN: (纸本)9781424443109

This paper proposes a way of implementing a deadbeat controller in FPGA. The focus is on the FPGA implementation of the digital controller. The emphasis is on the software tools for design and simulation of FPGA based hardware for control applications. The FPGA is interfaced to the controlled process by means of serial analog to digital converter (ADC) and digital to analog converter (DAC). The hardware interface to the ADC and DAC is also described. The experimental results present the method application to a case study: control of a DC motor. The main contribution is the method for design and simulation of control hardware implemented in FPGA. ©2009 IEEE.

关键词： Field programmable gate arrays (FPGA)

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On the sensorial integration for a holonic manufacturing system

On the sensorial integration for a holonic manufacturing sys...

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UKSim 3rd European Modelling Symposium on Computer Modelling and Simulation, EMS 2009

作者： Panescu, Doru Varvara, Gabriela Department of Automatic Control and Applied Informatics Gheorghe Asachi Technical University of Iasi Iasi Romania

ISBN: (纸本)9780769538860

The paper proposes a new method for sensorial integration within manufacturing systems. The control scheme is a holonic one, namely a PROSA reference architecture is considered. Some principles regarding the way the coordination and planning mechanisms have to be adapted for an enhanced sensorial integration are investigated. These refer a plan-space planning approach that operates with partially specified plans, and an extended form of the Contract Net Protocol used to manage the holons' agents cooperation activities. The agent based implementation, which was made in the Jack software environment, was a further support for the sensorial information use by the holonic system deliberative components. © 2009 IEEE.

关键词： Manufacture

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