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This paper investigates the reverse recovery behaviour of a SiC MOSFET intrinsic/body diode and compares the diode's performance with similarly rated SiC Schottky diodes at different temperatures. A circuit level analytical modelling approach is proposed for rapid and accurate predictions of switching transients and losses. The analytical models were solved numerically using MATLAB and the results...
This paper is about the impact of modeling the temperature distribution of machine designs on the results for respective optimization scenarios. In the past, a lot of machine design optimizations were presented, but just a small share considers modeling of the temperature characteristics. In order to study the impact of including a temperature model, a test scenario was investigated that features...
This paper aims to present a model-based design implementation of deadbeat-direct torque and flux control (DB-DTFC) with back-EMF self-sensing for a SPMSM using rapid control prototyping (RCP) in a real-time control environment. Current and flux observers are key technologies for achieving DB-DTFC. However, the implementation of DB-DTFC using RCP tools can lead to an incorrect execution sequence and...
Train cruising movement simulation module is an important part of high-speed train moving simulation system. According to the actual cruising movement characteristics of high-speed train, it is very important to design high-speed train cruising movement simulation algorithm to improve the calculation accuracy of train moving simulation system. Based on the conditions and the characteristics of high-speed...
To facilitate system architecture development using DoDAF, we propose an architecture development methodology based on DoDAF 2.0 in this paper. First, based on experiences in practice, gaps between Operational Viewpoint (OV), Capability Viewpoint (CV) and System/Service Viewpoint (SV/SvcV) are analyzed. Second, to bridge the gaps, two architecture viewpoints, i.e. Information activity Viewpoint (IaV)...
Due to shortened product innovation cycles, high variant products, demand fluctuation, equipment life cycles, and technology life cycles, regular changes in manufacturing systems are necessary. As elements of a factory are connected via a complex network of relations and flows, single changes can have an impact on the entire manufacturing system. In order to enable a successful change management,...
This paper introduces a new innovation for the analytical model to improve the throughput performance and energy efficiency for ideal channel conditions by the integration which challenges both fountain code and Markov chain modeling. In this context, the energy consumption is a critical resource that can be saved by minimizing the number of transmissions to be performed in the network. Channel contention...
Many requirements engineering and software architecture decisions are complicated by uncertainty and multiple conflicting stakeholders objectives. Using quantitative decision models helps clarify these decisions and allows the use of multi-objective simulation optimisation techniques in analysing the impact of decisions on objectives. Existing requirements and architecture decision support methods...
Monitoring systems and ensuring the required service level is an important operation task. However, doing this based on external visible data, such as systems logs, is very difficult since it is very hard to extract from the logged data the exact state and the root cause to the actions taken by the system. Yet, identifying behavioral changes of complex systems can be used for early identification...
Architectural engineering of embedded systems comprehensively affects both the development processes and the abilities of the systems. Verification of architectural engineering is consequently essential in the development of safety- and missioncritical embedded system to avoid costly and hazardous faults. In this paper, we present the Architecture Quality Assurance Tool (AQAT), an application program...
We present a set of tools for digital design, integration and verification of mixed-signal Application Specific Integrated Circuits (ASIC) developed within our design team. We have chosen Python for the development of the tools. By drawing on Python's features we have developed tools targeting many steps required across a design flow: a) Complex digital blocks are auto-generated, where Python generates,...
The report is devoted to the systematization of large terminological texts on the basis of a hierarchical representation of definitions of concepts. By integration, such models form a semantic network of terms. Thanks to the binary, homogeneous and oriented nature of this network, it is possible to obtain a hierarchical representation model and quantitative indices indicators for evaluating the integrity...
In the article, high significance of information agents for industrial application of smart technologies is emphasized. Objective fundamentals for research of information and communication environment impact on quality of a smart information agent functioning are analysed. The process framework for research of this type is proposed. The process framework is formed based on an extensible methodology...
In this paper, the main purpose is to design the model of a given mechatronics line, composed by several workstations and serviced during the recovery, transport and return of a work piece by a Wheeled Mobile Robot (WMR) which has mounted a Robotic Manipulator (RM). The work piece to be transported has been initially tested and did not pass the quality test. In this context, the Processing/Reprocessing...
Compared to critical systems, the user of Android is more concerned about the application launch time. It needs to perform rejuvenation to improve the user experience when the Android suffers from software aging that would lead to an increase of the launch time. Also, rejuvenation can incur in some costs. So it is important to make an optimal rejuvenation strategy to minimize these costs and improve...
In competitive markets, companies need well-designed business strategies if they seek to grow and obtain sustainable competitive advantage. At the core of a successful business strategy there is a carefully crafted value proposition, which ultimately defines what a company delivers to its customers. Despite their widely recognized importance, there is however little agreement on what exactly value...
Earlier research has identified network analysis techniques, methods, and models used to analyze structural aspects of an enterprise architecture (EA) modeled as a network or graph. However, there is still no common set of conceptual elements for such research that could allow one to identify the information requirements needed to perform this type of analysis. In the present research, we organize...
Malfunctioning areas and various business-IT mismatches encumber the achievement of strategic alignment. This paper deals with the concept of misalignment, with special attention to enterprise architecture (EA)-based analytical potential. In this paper, an analytical solution is tested in form of a case study at a road management authority. The study proposes a rule-based framework to reveal the symptoms...
The Modular Multilevel Converter (MMC) topology has been suggested to transmit the dc bulk power as oppose to other similar multilevel topologies, due to its multiple advantages. An stability analysis is fundamental to evaluate the operation of the MMC during normal operating conditions, and small and large disturbances The understanding of the MMC's performance along with the knowledge of the state-space...
The pump back test is widely adopted in the industry for characterizing and qualifying the high-power converters. One popular pump back test mode is to tie the DC link of two converters together and circulate the current through the inductor connected between the AC terminals. In this mode, one of converter operates in voltage mode to generate the virtual grid and another converter regulates the circulating...
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