This paper describes the last mile communication system solutions realized in PLC/RF hybrid technology, which is dedicated to Smart Grid communication subsystems, mainly for Smart Metering and Smart Lighting applicati...
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This paper describes the last mile communication system solutions realized in PLC/RF hybrid technology, which is dedicated to Smart Grid communication subsystems, mainly for Smart Metering and Smart Lighting applications. The use of hybrid technology makes the system more efficient and more secure (still being of low cost, in terms of both implementation and operation). This paper proposes a novel parameter, PDR, to describe the performance of the communications in the last mile network. The communications are realized with the use of the narrowband power line communications technique, the low power wireless communications technique, and the combination of them. The cost analysis for the proposed solution is also done. Theoretical considerations, contained in the paper, are the result of the author's experience in the design, implementation, and operation of the last mile Smart Grid communication systems, realized in the narrowband PLC or 433/868 MHz radio technology. These communication systems were developed for data acquisition and distribution between specific terminals, which are Smart Meters or Smart Lanterns. The aim of this paper is to outline superiorities of the hybrid technology, from which the most important is a low layer protection of the sensitive critical infrastructure, which undoubtedly is a last mile Smart Grid communication network.
The adoption of service-oriented architectures based on web services in industrial application domains enables the seamless integration of business software with manufacturing tasks and promises increased interoperabi...
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ISBN:
(纸本)9781424468508
The adoption of service-oriented architectures based on web services in industrial application domains enables the seamless integration of business software with manufacturing tasks and promises increased interoperability. To be able to invoke a manufacturing task running on a programmable logic controller (PLC) as a web service from a business application, the SOAP4PLC engine has been proposed. In this paper, an extension of the SOAP4PLC engine is presented to invoke a web service based business application from a PLC application. A use case is shown in which the extended SOAP4PLC engine is used to interface a PLC application concerned with realizing the functionality of a charging station for electrical vehicles with a web service based accounting system.
作者：
He, ShupingLiu, FeiAnhui Univ
Coll Elect Engn & Automat Hefei 230601 Peoples R China Jiangnan Univ
Inst Automat Key Lab Adv Proc Control Light Ind Minist Educ Wuxi 214122 Peoples R China
This paper studies the optimal finite-time passive control problem for a class of uncertain nonlinear Markovian jumping systems (MJSs). The Takagi and Sugeno (T-S) fuzzy model is employed to represent the nonlinear sy...
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This paper studies the optimal finite-time passive control problem for a class of uncertain nonlinear Markovian jumping systems (MJSs). The Takagi and Sugeno (T-S) fuzzy model is employed to represent the nonlinear system with Markovian jump parameters and norm-bounded uncertainties. By selecting an appropriate Lyapunov-Krasovskii functional, it gives a sufficient condition for the existence of finite-time passive controller such that the uncertain nonlinear MJSs is stochastically finite-time bounded for all admissible uncertainties and satisfies the given passive control index in a finite time-interval. The sufficient condition on the existence of optimal finite-time fuzzy passive controller is formulated in the form of linear matrix inequalities and the designed algorithm is described as an optimization one. A numerical example is given at last to illustrate the effectiveness of the proposed design approach. (C) 2013 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.
The primary aim of the study presented in this paper is to propose a real-time temperature data transmission approach for intelligent cooling control of mass concrete. A mathematical description of a digital temperatu...
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The primary aim of the study presented in this paper is to propose a real-time temperature data transmission approach for intelligent cooling control of mass concrete. A mathematical description of a digital temperature control model is introduced in detail. Based on pipe mounted and electrically linked temperature sensors, together with postdata handling hardware and software, a stable, real-time, highly effective temperature data transmission solution technique is developed and utilized within the intelligent mass concrete cooling control system. Once the user has issued the relevant command, the proposed programmable logic controllers (PLC) code performs all necessary steps without further interaction. The code can control the hardware, obtain, read, and perform calculations, and display the data accurately. Hardening concrete is an aggregate of complex physicochemical processes including the liberation of heat. The proposed control system prevented unwanted structural change within the massive concrete blocks caused by these exothermic processes based on an application case study analysis. In conclusion, the proposed temperature data transmission approach has proved very useful for the temperature monitoring of a high arch dam and is able to control thermal stresses in mass concrete for similar projects involving mass concrete.
The potential for very long tracks, multiple vehicles travelling at high speed, high positioning repeatability and rapid acceleration turns the short primary linear drive into a good candidate for use in material tran...
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The potential for very long tracks, multiple vehicles travelling at high speed, high positioning repeatability and rapid acceleration turns the short primary linear drive into a good candidate for use in material transfer and processing lines. To implement this system, the linear motor was designed for synchronous and induction operation, since the costs can be considerably reduced by using a simple induction rail at the long transporting sections, instead of permanent magnets. This study is focused on the vehicle motion control strategy of a short primary linear drive, in order to regulate the speed without jerks. The implemented control algorithm for both the operations is based on a field oriented control, which uses a moving AB-reference frame. The position information was obtained by using a magneto-resistive incremental encoder, which was mounted on the vehicle, and a magnetic linear scale, which was installed along the passive track. Furthermore, force generation which depends on the vehicle's position will be discussed. Finally, experimental tests are performed to demonstrate the feasibility of the employed control strategy.
A compact on-chip measurement system is proposed for the testing of multiple programmable delay lines (timing digital-to-analogue converters (DACs)) through a low-speed analogue test bus. The system consists of very s...
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A compact on-chip measurement system is proposed for the testing of multiple programmable delay lines (timing digital-to-analogue converters (DACs)) through a low-speed analogue test bus. The system consists of very small delay-to-current converters local to each timing DAC, multiplexed to a centrally located programmable-gain sense amplifier. Silicon test results demonstrate that the system is capable of characterising the delay against the control code relationship of a timing DAC.
An error-correcting code (ECC) immune to bit errors can make memory performance severely degraded since incomplete-word ECC write requests lead to inefficient operations on a dual in-line memory module (DIMM). A DIMM ...
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An error-correcting code (ECC) immune to bit errors can make memory performance severely degraded since incomplete-word ECC write requests lead to inefficient operations on a dual in-line memory module (DIMM). A DIMM controller efficient for such ECC operations is proposed. The key idea is that read-to-write and write-to-read operations caused by incomplete-word ECC write requests are split into independent read and write operations, and then the read and write operations are individually scheduled under data coherence constraints. Experimental results show that the proposed DIMM controller achieves 11% shorter memory latency, and 9.3% higher memory utilisation, on average, than the latest conventional DIMM controller in industrial multimedia applications. Moreover, it achieves up to 2.1 times higher memory performance on synthetic benchmarks.
A direct method for recovering three-dimensional (3D) head motion parameters from a sequence of range images acquired by Kinect sensors is presented. Based on the range images, a new version of the optical flow constr...
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A direct method for recovering three-dimensional (3D) head motion parameters from a sequence of range images acquired by Kinect sensors is presented. Based on the range images, a new version of the optical flow constraint equation is derived, which c...
This paper introduces the application of off-the-shelf Android tablet computers as real-time capable control devices. We present an IDE to create and execute PLC programs written in Structured Text on a tablet running...
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ISBN:
(纸本)9781479948451
This paper introduces the application of off-the-shelf Android tablet computers as real-time capable control devices. We present an IDE to create and execute PLC programs written in Structured Text on a tablet running RTAndroid. This derivative of Android with support for real-time applications ensures the predictable execution of PLC programs. A USB-driven field device adapter enables interaction with peripheral hardware. The evaluation demonstrates the competitiveness of our solution in comparison to conventional PLC devices.
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