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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...
Resistive memory is a promising emerging technology but is prone to defects due to uncertainties in nanoscale fabrication. The test time of existing techniques for bipolar metal–oxide memristors is dominated by slow writes. Fast March tests are proposed that benefit from fast write operations. The test application time is reduced significantly while simultaneously reducing the average test energy...
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...
A novel RRAM-based pattern recognition system with locally inhibited post-neurons is developed. The system is able to learn the whole MNIST training set (60,000 patterns). By using the system, the same post-neuron is fired by the similar patterns in the same training class, which causes the reduction of hardware cost. With the locally inhibited post-neuron, the system can achieve more than 90.73%...
Insertion of scan chains, as the most common DFT technique, provides a powerful way for the structural testing of integrated circuits (IC). However, it can be easily misused by unauthorized parties to acquire critical design information. Scan-based attacks are one kind of side channel attacks that reveal the comprehensive information of IC design noninvasively. Reports have shown many successful scan...
In this work, we present a parameter extraction method for TiO2 memristive devices that applies on a resistive switching rate model which embodies only four parameters for each voltage biasing polarity. The simple form of the model functions allows the derivation of a predictive analytical resistive state response expression under constant bias voltage. By employing corresponding experimental testing...
We demonstrate a desktop platform which has the ability of modeling ReRAM TiO2 samples in a highly automated manner. The system consists of a bespoke RRAM characterization instrument that hosts packaged RRAM devices and is operated via a PC. The system's python-based software includes a module that automatically applies strategically chosen sequences of pulses to a test device and then extracts the...
During the last decades the number of microgrids and their research have increased notably, as they offer a high versatility for the integration of distributed generation (DG) units and renewable energies. Among the different types of microgrids, dc systems are becoming more popular due to their advantages over conventional ac systems. However, their control techniques differ from the ones employed...
The experimental characterization of a new DC/DC converter for high voltage, up to 60 V, automotive applications is proposed in the paper. A summary description of the inductorless converter is showed to understand the measurement results. The bare die is used to avoid the effects of the package on the measures. The tests are focused on Electromagnetic Interference (EMI) highlighting the low values...
In this paper we present an approach to reduce the verification cost of distributed elevator control systems through embedded code re-use to co-simulate networked devices in a hardware-in-the-loop simulator: the CAN Restbus simulator. The approach is applied to a case study in the field of distributed control system for elevators movement. We discuss the use cases for the CAN Restbus simulator, the...
A variety of alarm management techniques are available to improve the performance of alarm systems and avoid alarm overloading; in particular, the state-based alarming strategy has been widely used in practice to remove noninformative alarms that are caused by the switching of operating modes. However, the configuration of mode-based alarming strategies relies on proficient process knowledge, and...
IEC 61850 Generic Object-Oriented Substation Event (GOOSE) systems can be designed in a manner that allows testing personnel to easily identify problems and verify system functionality. This paper provides procedures and guidelines for successfully designing and integrating GOOSE protection schemes while keeping the feasibility of initial commissioning and maintenance testing in mind. The paper addresses...
Pole mounted transformers are subject to inrush currents, that occur during start-up of the transformer. The inrush currents may cause unwanted forces on the windings. Testing was done at a Transformer Testing Facility to develop a model to understand the inrush currents. The model matched measured results closely.
This paper presents a new scan-based at-speed test signal scheme called One Clock Alternated Shift (OCAS) for minimizing the potential impact of the power distribution network PDN impedance variation. The strategy behind this new scheme is to mimic the clock signal of the functional mode as closely as possible. As a case study, we consider the PDN impedance variation that can occur with 3-D ICs, more...
This paper describes a phase switching algorithm for Interpolating Digital-to-Analog Converter (DAC) based Arbitrary Waveform Generators (AWG). This was possible by using the standard phase switching algorithm with the addition of simple phase offset and systematic phase difference adjustment; this was discovered by experimenting with suppression of the intermodulation distortion (IMD) components...
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