The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Based on transformer antenna theory, this paper first presents an analytical model for near-field magnetic coupling incorporating transformer inductance coil system. Formulae are derived for the self inductance and mutual inductance characteristics at the reader antenna. The paper then describes how this model and electromagnetic simulation are used for the design of a prototype three dimensional...
This paper presents an application for the automatic generation of bond graph models. The basis for this automated creation is a modified plant model in the XML-format according to the IEC PAS 62424 (CAEX). The application developed in the programming language C, extracts and converts the information which is, then, stored in a model file meeting the requirements and structure of the modelling/ simulation-language...
This paper presents the application of artificial neural networks to implement a magnetic hysteresis model. Accurate modelling of hysteresis is essential for both the design and the performance evaluation of electromagnetic devices. It is shown that artificial neural networks (ANNs) provide natural settings whereby the Preisach model can be readily implemented. The comparison with the experiments...
Efficient design-time management and documentation of run-time data elements are of paramount importance when developing and maintaining modern real-time systems. In this paper, we present the results of an industrial case-study in which we have studied the state of practice in data management and documentation. Representatives from five companies within various business segments have been interviewed...
This paper presents a new methodology to design multivariable PID controllers for two-input and two-output systems. The proposed control strategy, which is centralized, combines four PID controllers plus two possible delays and two P controllers. The proportional gains in the P controllers act as tuning parameters in order to modify the behavior of the loops almost independently. The design procedure...
In this paper, we present the development of a plug-in framework for integration of real-time analysis methods in the Rubus Integrated Component Environment (Rubus-ICE). We also present the implementation, and evaluate the integration, of two state of the art analysis techniques (i) response-time analysis for tasks with offsets and (ii) shared stack analysis, as plug-ins, in the Rubus-ICE framework...
This article describes the boundary conditions and initial situation in planning and realization of body-in-white shop floors in the automotive industry and its deficits. This leads to requirements for an approach. Afterwards, the state of the art was shown and an approach developed step by step. At this point, the actions of the approach step will be described and the potentials and limits evaluated.
This paper studies the adoption of the ZigBee technology to replace broadcast-based wired communications in automation systems for Health Smart Homes. An analytical study is presented as well as the experimental results validating the derived expressions. Results show that the timeliness of ZigBee broadcast communications, in interference-free environments, can cope with the requirements of home automation...
This paper deals with the problem of coexistence of wireless sensor networks (WSNs) for industrial applications, proposing new approaches. In fact, if several WSNs operate in the same area, the reliability of the system rapidly decreases, especially if static radio channel assignment WSNs and frequency hopping WSNs are mixed. The proposed architecture is based on a collaborative approach that exploits...
Electromagnetic interferences and other disturbances in industrial environment may decrease the performance of wireless sensor networks. However, the lack of empirical results providing proof for these arguments is evident. In this paper, analysis results of systematic experiments carried out for potential, disturbing factors in industrial environment are presented. Moreover, a novel entropy-based...
Control systems monitor and control production plants and manufacturing systems. Before they can be taken into operation, they have to be configured. To automate this process, which is called engineering, a standardized exchange format is required that forms the basis of the work of all those who are involved in the project and that is understood by anyone involved. In addition, the contents to be...
Wireless sensor network (WSN) is an emerging technology that targets multiple applications in the different environments. Its infrastructure is composed of a large number of sensor nodes with a limited physical capacity and low cost. The energy consumption must be as optimized as possible in order to extend its lifetime. The use of data compression techniques can be an advantage in the WSN context,...
EtherCAT is a very popular solution for connecting control applications to field devices in industrial environments, which is based on Ethernet transmission technology. Even though EtherCAT features a very high level of communication efficiency, that permits thousands of I/O points to be periodically exchanged between the controlling device and the decentralized periphery with cycle times well below...
In the last years the use of Ethernet as the communication technology for automation systems has been sensibly increasing. In particular, real-time Ethernet networks have become widely adopted. In this paper we consider one of the most popular Real-Time Ethernet networks, namely EtherCAT. We firstly provide a short outline of the protocol, along with a description of a simulation model we have developed...
Modern trends in manufacturing demand more flexible and adaptive handling of production order execution. Due to its distributed nature, agent-based systems become a suitable solution to cope with large scale and changeable industrial systems making management and execution of a production order crucial for the system efficiency. PABADISpsilaPROMISE is an agent-based architecture with a dedicated entity...
The planning and design of building automation systems is a time consuming, error prone and nowadays more and more expensive task, consisting of a lot of repeated manual design steps done by specialized engineers. To reduce the engineering costs for such systems, the authors present a new automated top-down design approach within this paper. A knowledge-based system supports the planner at the requirement...
The rapid growth of distributed real-time systems creates a need for cheap and available network solutions while still fulfilling the real-time requirements. In this paper we propose a method for less pessimistic delay analysis for packet switched first come first serve network, when knowing the intervals of possible message generation. Experiments show that the proposed method generates the expected...
AFDX (avionics full duplex switched Ethernet, AR-INC 664) developed for the Airbus A380 represents a major upgrade in both bandwidth and capability. Its reliance on Ethernet technology helps to lower some implementation costs, but guaranteed service presents challenges for system designers. An analysis of end-to-end transfer delays through the network is required in order to determine upper bounds...
This paper deals with supervisory control of discrete event systems (DES) modeled by interpreted Petri nets (IPN). In the approach herein proposed, both, the specification and the system model are described by IPN, however, the specification describes a state subset that the specification must reach. It also captures the order in which these states must be reached. Based on this framework, this paper...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.