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This paper examines the problem of generating testing actions for electronic industry test systems designed for verification of electronic packages of UHF band. This paper shows complex problems of setting amplitude and time parameters of multichannel generators of test signals. The problems of multichannel wide range signal generation and frequency control, rise and fall time control, pulse time...
An inherent variable stiffness approach was proposed to suppress the rebound and impact of the electrostatic switch due to waveform deviations. A simple clamped-guided beam spring with large deflection, which generated inherent cubic nonlinear restoring force, was adopted for implementation of the approach. The initial stiffness is very small but increases significantly with the displacement. In this...
The measurement and analysis of the spatial morphology and dynamic characteristics of the electric arc plasma inside low voltage circuit breaker is an effective way to improve its breaking performance and modern testing techniques have been applied to the experimental study on switching arc plasma in recent years. However, these techniques usually need to destroy the extinguishing chamber wall and...
Multiple SDN applications can make several harmful interferences unintentionally, although each individual application may be properly developed. This paper proposes a Multiple SDN Applications Interference Detector (MSAID). To bridge the gap between the source code of applications and the actual interferences, we leverage symbolic execution and constraint solving to obtain how the event handler handles...
We applied test automation in the style of Behavior-Driven Development (BDD), an agile software development technique. In applying BDD, the problem is that a large amount of similar configurations of network switches have to be written in the BDD test specification files. To solve this problem, parameterization of configurations is considered effective. However, Gherkin, the BDD test specification...
Integrating analog-to-digital converters that utilize a phase-sensitive detector (PSADCs) are frequently used in high precision instrumentation and measurement systems. As any technical object, a PSADC is subject to faults. These faults must be detected promptly and accurately by built-in low complexity hardware. In the present work, this objective is achieved by the adoption of error-control codes...
Arc flash is one of the leading causes of injury and death in electrical work-related incidents. In recent years, arc flash risk mitigation and protection solutions have become the forefront topics in the electrical industry studies. Conventional techniques provide ways to lower incident energy on installed systems but they add to the system limitations. This is a case study which explores arc flash...
The programmability of Software-Defined Networking (SDN) challenges the correctness and reliability of networks. There may be design flaws as well as implementation bugs in SDN applications. White-box testing methods with formal models rely on source codes, which limits the applicability of these methods. Black-box methods without behavior models cannot systematically cover an application's functions...
With the future adoption of intermittent sources of power generation and the need for dynamic and reconfigurable power systems, a shift in power system design leans towards power electronics based, fault current limited distribution systems. Design requirements for breakers will focus on fast operation to handle dynamic changes, rather than breaking large magnitude fault currents, as in conventional...
This paper presents a novel semiconductor switch test platform for power converter optimization which allows to test power semiconductors under different switching current waveforms. As switching current has a major influence on the switching behavior of power semiconductors and thus on switching losses. Compared with conventional double pulse test circuit which can only test power semiconductors...
Supervisory Control and Data Acquisition (SCADA) systems are used in many industries, particularly in the control of nationwide electric grids. These systems may by law, technical obsolescence, or failure, need to be replaced by newer ones. However, the testing and handing over of functions from the old SCADA to the new one (i.e., switchover) has to be done with minimum risk and maximum continuity...
The applications ("apps") running on Android need to be adequately tested to avoid faults. Researchers have developed a number of test input generation tools for automated app testing and tried to improve test coverage to detect as many faults as possible. However, existing testing tools achieve very low coverage for some specific apps because they highly depend on external factors to run...
Heavy ion and proton single event effects characterization data on BAE Systems RADNET 1848-PS Application Specific Standard Product are presented. The RADNET 1848-PS is a Serial RapidIO packet switch capable of running at rates up to 3.125 Gbaud. An at-speed SRIO network test for SEE cross section measurement is used to estimate soft error rates for observed upset modes in a reference orbit environment.
One of the challenges for using metamodels in Model Driven Engineering is to automatically generate metamodel instances. Each instance should satisfy many constraints defined by a metamodel. Such instances can then be used for verifying or validating metamodels. Recent studies have already shown that this can be tackled by using SAT/SMT solvers. However, such instance generation does not take coverage...
The paper seeks to design, test and implement a fast transfer scheme for an existing Alpha Olefins substation at Sasol Secunda, Mpumalanga Province, in South Africa. The aim of this design is to switch motor bus bars over to an intact back up supply should the main supply fail and to switch them back again when the main supply is restored. The switchover to the back up supply must be performed as...
Outages within the paper industry lead to significant costs to operators. To reduce unplanned outage and losses condition monitoring (CM) techniques can be implemented to determine asset health and help target maintenance where it is most required. The challenges faced by the paper industry to implement condition based maintenance (CBM) on their medium voltage (MV) and high voltage (HV) networks and...
Accurate training on electronic measurements can be obtained while experimenting with real sensors, electronic circuits and equipments. The paper presents an experimental system that allows the study and testing for two ultrasonic sensors, the remote programming for one of them and the monitoring of switching output for each sensor. A programmable logic controller performs the sensor remote programming...
The application of a physical model of the transmission line for the study of controlled series compensation devices is considered. The description of the developed physical model is submitted, specifications and the methodology of its use in research and debugging series compensation devices are examined. As the example the article describes physical line model application for evaluation and debugging...
The paper presents a real-time (RT) model implementation of a power flow controller device called Dynamic Power Flow Controller (DPFC). The RT model is developed in a RT simulator (RTS) from OPAL-RT Technologies Inc. and designed with reference to a hardware DPFC model developed at the Institute of Energy Systems, Energy Efficiency and Energy Economics (ie3), TU Dortmund University, Germany. The DPFC...
In automotive applications detailed multi-domain modeling and testing at component and sub-component level is necessary to improve the understanding and design capabilities for higher performances and lower costs. New and faster tools are required to reduce the development and testing time and effort for electrical actuated automotive sub-systems. The paper presents a thermal model to simulate and...
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