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This paper describes a novel technique for creating the test program sets (TPSs) that are used by automatic test equipment (ATE) to test electronic circuits and devices. This paper presents an architecture consisting of a genetic algorithm (GA) test proposer and a pattern classifier test evaluator. This architecture has been shown to produce optimized test sequences without human intervention. In...
This paper introduces the results of calculation of the steady state (load flow) and short circuit conditions within E.ON distribution network in the Czech Republic. The purpose of this calculation is to determine whether the change in electrical parameters after the reconstruction of the distribution networks substation Sokolnice stay within limits or not. According to these results appropriate technical...
Scan chain structure consumes 10%∼30% of die area, and most yield loss is caused by scan chain faults. This makes scan chain diagnosis be the key important method to ensure the high-quality products. The conventional scan chain diagnosis techniques usually conduct to a large range of suspect faulty flip flops. The failure analysis of those suspect faulty flip flops is time-consuming and costly. In...
DC-link current sensing enables adjustable speed drives to be designed compactly. Except for the low-impedance earth-fault protection the whole drive is protected by a single current-sensing element as well as drives with three current sensors on the output phases. A new indirect detection method for improving the low-impedance earth-fault protection of adjustable speed drives with a low-side DC-link...
This paper created a new research space in the faults modeling and detection area of the industrial systems, especially photovoltaic generators. It reserved for modeling and detection the hybrid defects, like the presence of cells open- and short-circuit within the same photovoltaic cells group. For a small investment, the new algorithm created a new platform. It exposed a display screen of the database,...
Recent feedback obtained while applying Model-based diagnosis (MBD) in industry suggests that the costs involved in behavioral modeling (both expertise and labor) can outweigh the benefits of MBD as a high-performance diagnosis approach. In this paper, we propose an automatic approach, called Antares, that completely avoids behavioral modeling. Decreasing modeling sacrifices diagnostic accuracy, as...
Traditional methodologies for calculating short-circuit are strongly influenced by the influential parameters of the calculation, among them: Short-circuit power; Resistance and reactance of cables; Fault impedance. The vagueness of these parameters may compromise the setting protection and lead even to a complete lack of protection in some situations. This paper presents a methodology of calculation...
There are several algorithms for fault diagnosis of digital systems which are used throughout academic and industrial environments. Among those algorithms, TMEAS and SCOAP find particular appeal because of their simplicity in calculating testability of a given digital circuit and in imparting useful information to test engineers regarding the test-locations most vulnerable to occurrence of stuck-at-zero...
During recent years the increasing introduction of system functionality into integrated devices resulted into several new problems for chip designers. First, high system-on-chip complexity combined with increased clock frequencies leads to power budget and thermal issues. Second, small semiconductor process structures are more sensitive to faults resulting from logic degradation and external radiation...
This paper presents an enhanced path delay fault simulator for combinational circuits. The main objective of this work is to improve the simulation time of path delay fault testing. Our experiments consider K-longest path sets of ISCAS'85 benchmark circuits, and 10M single input change (SIC) test patterns were applied and repeated ten times in order to cover statistical variations. The experimental...
Radiation tolerance can be achieved by triplicating all the circuits and using majority voting, triple module redundancy (TMR), to remove faults caused by radiation. This approach, applied blindly, requires at least a 3?? increase in hardware and power consumption. In this paper we introduce an automated low cost software platform for efficiently performing fault injection experiments targeting single...
Self-Healing is one of the features of smart grid and FLISR is the important technology implementing self-healing. Simulation testing is the underpinning of developing self-healing grid. Multiple components, such as fault detection, communication, protective relay and remote control, are involved in feeder automation, so the quality of testing will influence the operation reliability directly. It's...
In this paper, an agile fault injection method by means of discretional fault mode is introduced, in order to go over the localization of the conventional fault injection method based on the hardware, and to offer a new means that is used to validate the testability indexes of PHM system. After describing the basic principle of such method, this paper discusses universal elements and groupware modeling,...
The circuit fault injection based on EDA simulation is one of the efficient methods of testability analysis. In order to implement fault simulation, the first step is to establish the models that reflect the function or fault modes appropriately. Considering the various components of number systems in PHM system, although the prevalent software contains parts libraries, the symbols in the libraries...
On basis of scientific research projects recently fulfilled by the author, and through detailed analysis for more than 30 LASAR circuit simulation result documentations, this paper makes a detailed description of fault diagnosis software development process, which provides design basis for relevant development of circuit fault simulation software. The assay stipulates data domain testing technology...
Hardware fault-insertion test (FIT) is a promising method for system reliability test and diagnosis coverage measurement. It improves the speed of releasing a quality diagnostic program before manufacturing and provides feedbacks of fault tolerance of a very complicated large system. Certain level insufficient fault tolerance can be fixed in the current system but others may require ASIC or overall...
This paper presents a complete framework for Verilog-based fault injection and evaluation. In contrast to existing approaches, the proposed solution is the first one based on the Verilog programming interface (VPI). Due to standardization of the VPI, the framework is-in contrast to simulator command based techniques-independent from the used simulator. Additionally, it does not require recompilation...
Decreasing hardware reliability is expected to impede the exploitation of increasing integration projected by Moore's Law. There is much ongoing research on efficient fault tolerance mechanisms across all levels of the system stack, from the device level to the system level. High-level fault tolerance solutions, such as at the microarchitecture and system levels, are commonly evaluated using statistical...
Combining the failure practical example, neural network analysis is used for diagnosis. Using the neural network in MATLAB to simulate the circuit fault system, this is using two different kinds of training functions. For the better analysis of failure diagnosis problems, firstly, using MATLAB software to simulate failure problems such as the emergence of regular power, short circuit and broken circuit...
This paper narrates the design on constructing informatized training and assessment system of refrigerate equipment. Through the analysis of functional module such as RS485, intelligent embedded controllers, simulation training platform, the characteristics of higher efficiency, low-loss, lowcost, guarantee the fairness and just of the examination are mainly discussed.
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