Active self-assembling and self-organizing systems are programmed at the level of interactions in the system of particles. The approach is demonstrated by using it to control the programmable parts testbed which is an...
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Active self-assembling and self-organizing systems are programmed at the level of interactions in the system of particles. The approach is demonstrated by using it to control the programmable parts testbed which is an experimental system. A graph grammar which is a local interaction rule book was provided for each system. This graph grammar has the ability to model the physics of the particles and to program desirable outcomes of particle interactions. Specifically, a grammar can describe and direct the network topology of a self-organizing system. Several problems are described regarding self-organization and are divided into two parts. First, is a graph grammar that determines the outcomes of particle or robot interactions. Second, a stochastic process and an optimization problem is defined. Lastly, although their are solutions to this problems of self-organizing, there is still a need to new directions and paradigms for control systems research.
programmablelogic Controller (PLG) is extensively used in industries for controlling sequence of actions of the process since last two decades. Hence we have decided to develop PLC based sequential batch process cont...
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programmablelogic Controller (PLG) is extensively used in industries for controlling sequence of actions of the process since last two decades. Hence we have decided to develop PLC based sequential batch process control system of our laboratory. The sequence of process flow is decided for controlling the parameters like level and temperature. The brain of the system is PLC. Appropriate hardware for interfacing the process to the controller is developed for controlling the level and temperature of the process. For controlling sequence of actions ladder diagram is developed. The program minimizes shut down by providing recycle under certain condition to establish normal operation before checking out. Timer provides precise timings. Finally this system is factory programmable.
This paper presents an innovative self-tuning nonlinear controller ASPECT (advanced control algorithms for programmable logic controllers). It is intended for the control of highly nonlinear processes whose properties...
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This paper presents an innovative self-tuning nonlinear controller ASPECT (advanced control algorithms for programmable logic controllers). It is intended for the control of highly nonlinear processes whose properties change radically over its range of operation, and includes three advanced control algorithms. It is designed using the concepts of agent-based systems, applied with the aim of automating some of the configuration tasks. The process is represented by a set of low-order local linear models whose parameters are identified using an online learning procedure. This procedure combines model identification with pre- and post-identification steps to provide reliable operation. The controller monitors and evaluates the control performance of the closed-loop system. The controller was implemented on a programmablelogic controller (PLC). The performance is illustrated on a field test application for control of pressure on a hydraulic valve. (c) 2005 Elsevier Ltd. All rights reserved.
The growing interest in using electrical power networks as an alternative broadband communication medium has spurred many to study the channel characteristics and to formulate channel models of these power networks. E...
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The growing interest in using electrical power networks as an alternative broadband communication medium has spurred many to study the channel characteristics and to formulate channel models of these power networks. Existing channel-modelling techniques for power-line communications (PLC) typically assume that the power networks are connected in tree or radial topology. This assumption is not entirely valid as many electrical circuits in residential homes, commercial and industrial facilities may be wired in ring topology. Using the concept of scattering parameters a novel method derives analytical expressions for the channel transfer function and input impedance of ring-based PLC networks. The derived transfer function and input impedance are successfully verified against measurements conducted on a practical electrical power network in the frequency band from 1 to 30 MHz.
The polarized internal target for the ANKE experiment at the Cooler Synchrotron COSY of the Forschungszentrum Julich utilizes a polarized atomic beam source to feed a storage cell with polarized hydrogen or deuterium ...
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The polarized internal target for the ANKE experiment at the Cooler Synchrotron COSY of the Forschungszentrum Julich utilizes a polarized atomic beam source to feed a storage cell with polarized hydrogen or deuterium atoms. The nuclear polarization is measured with a Lamb-shift polarimeter. For common control of the two systems, industrial equipment was selected providing reliable, long-term support and remote control of the target as well as measurement and optimization of its operating parameters. The interlock system has been implemented on the basis of SIEMENS SIMATIC S7-300 family of programmable logic controllers. In order to unify the interfacing to the control computer, all front-end equipment is connected via the PROFIBUS DP fieldbus. The process control software was implemented using the Windows-based WinCC toolkit from SIEMENS. The variety of components, to be controlled, and the logical structure of the control and interlock system are described. Finally, a number of applications derived from the present development to other, new installations are briefly mentioned. (c) 2006 Elsevier B.V. All rights reserved.
programmable logic controllers (PLCs) are widely used in industrial world. In PLC-based control systems, low-resolution (especially ON/OFF) sensors are low-cost, and actuators are commonly used since they are compatib...
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programmable logic controllers (PLCs) are widely used in industrial world. In PLC-based control systems, low-resolution (especially ON/OFF) sensors are low-cost, and actuators are commonly used since they are compatible with programming languages used in PLCs. PLC switches ON/OFF of the actuators as ON/OFF of the sensors changes. In designing PLC-based systems, the design of parameters of these sensors and actuators (e.g., position of limit switches, torque of motors, and so on.) is important problem since they affect on overall performance of the system. This problem, however, has not been fully discussed yet. In this paper, the systematic design method for this problem is developed. The main idea is to express the model of the system as Mixed logical Dynamical System (MLDS), and to formulate the problem as mathematical programming problem. The developed idea is applied to line following control of two-wheeled vehicle. The usefulness of the proposed method is demonstrated through simulation and experiment.
PLCs as a whole are widely used in the process automation industry. The process control industry has experienced a constant change, such as downsizing, reduced costs, and standardization, as the fore-front for process...
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PLCs as a whole are widely used in the process automation industry. The process control industry has experienced a constant change, such as downsizing, reduced costs, and standardization, as the fore-front for process control. This article addresses the issues of how today's PLCs in its form are applied to process automation systems.
In response to extracellular ligands, surface receptor tyrosine kinases and G-protein-coupled receptors activate isoforms of phospholipase C ( PLC) and initiate calcium signaling. PLC can activate expression of surfac...
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In response to extracellular ligands, surface receptor tyrosine kinases and G-protein-coupled receptors activate isoforms of phospholipase C ( PLC) and initiate calcium signaling. PLC can activate expression of surface transient receptor potential channels ( TRPC) such as TRPC3, which modulate calcium entry through the plasma membrane. A recent paper shows that competitive binding of cytoplasmic TFII-I, a transcription factor, to PLC-gamma results in inhibition of TRPC3-mediated agonist-induced Ca2+ entry. These results establish a novel cytoplasmic function for TFII-I.
This paper presents a regular layout fabric made of via-programmable MCML universal logic cells for structured ASIC applications and the associated design flow. The proposed structured ASIC fabric offers very high noi...
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ISBN:
(纸本)9781424401727
This paper presents a regular layout fabric made of via-programmable MCML universal logic cells for structured ASIC applications and the associated design flow. The proposed structured ASIC fabric offers very high noise immunity due to the differential operation, as well as low production cost due to the via-programmable properties of the universal logic cell. Implementations of a number of circuits are presented and the area/speed performances are compared with classical CMOS implementation using a commercial standard cell library in 0.18 mu m CMOS technology.
The integrated systems today require flexibility, performance and reconfigurability. The trends in this domain lead to integrate on a single chip different processing cores, communication units and reconfigurable logi...
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ISBN:
(纸本)9783901882197
The integrated systems today require flexibility, performance and reconfigurability. The trends in this domain lead to integrate on a single chip different processing cores, communication units and reconfigurable logic. Therefore the Systems on Chip (SoC) can embed programmablelogic. In order to challenge the reconfigurability paradigm for special issues such as communication, synchronization or security, the asynchronous logic is a very promising approach. Nevertheless, the standard programmablelogic blocks are not well-suited to map asynchronous circuits. The goal of this study is to define a more adequate programmable structure to implement asynchronous designs on SoCs embedding a reconfigurable part. This work is part of a larger project which includes the design of an embedded programmablelogic Device (e-PLD) dedicated to the implementation of clockless circuits. The more robust and reliable asynchronous circuits are quasi-delay insensitive. These circuits are mainly constructed with Muller gates. The paper presents a new Look-Up Table (LUT) architecture well-adapted to the Muller gate implementation. This new LUT allows the combination of a single memory-point with combinational logic. This programmable memory is realized thanks to an optional feedback structure. This architecture has been evaluated in CMOS, Pass-Transistor logic and 3-state logic which is a non-conventional way to design LUTs. The simulations report detailed comparisons between the different logic styles and demonstrate for equivalent power consumption a higher speed for 3-state logic.
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