Topic
Fault coverage
About: Fault coverage is a research topic. Over the lifetime, 10153 publications have been published within this topic receiving 161933 citations. The topic is also known as: test coverage.
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01 Oct 2013
TL;DR: Real time new universal circuit based model of photovoltaic panels is presented, and model residual based on Sequential Probability Ratio Test (WSPRT) framework for electrical fault diagnosis in PV system is introduced.
Abstract: This paper proposes new method of monitoring and fault detection in photovoltaic systems, based mainly on the analysis of the power losses of the photovoltaic system (PV) by using statistical signal processing. Firstly, real time new universal circuit based model of photovoltaic panels is presented. Then, the development of software fault detection on a real installation is performed under the MATLAB/Simulink environment. With model based fault diagnosis analysis, residual signal from comparing Simulink and real model is generated. To observe clear alarm signal from arbitrary data captured, Wald test technic is applied on residual signal. A model residual based on Sequential Probability Ratio Test (WSPRT) framework for electrical fault diagnosis in PV system is introduced.
40 citations
15 Sep 1999
TL;DR: This work presents a campaign of fault injection to validate the dependability of a fault tolerant microcomputer system, duplex with cold stand-by sparing, parity detection and a watchdog timer, using an injection tool designed with this purpose.
Abstract: This work presents a campaign of fault injection to validate the dependability of a fault tolerant microcomputer system. The system is duplex with cold stand-by sparing, parity detection and a watchdog timer. The faults have been injected on a chip-level VHDL model, using an injection tool designed with this purpose. We have carried out a set of injection experiments (with 3000 injections each), injecting transient and permanent faults of types stuck-at, open-line and indetermination on both the signals and variables of the system, running a workload. We have analysed the pathology of the propagated errors, measured their latency, and calculated both detection and recovery coverage. We have also studied the influence with the fault duration and fault distribution. For instance, system detection coverage (including noneffective faults) is 98% and the system recovery coverage is 95% for short transient faults (0.1 clock cycles).
40 citations
TL;DR: In this article, an Artificial Neural Network (ANN) approach is presented to simulate a complete scheme for distance protection of transmission lines, which is based on a modular approach whereby different neural network modules have been adopted for fault detection, fault classification and fault location.
Abstract: This article presents an Artificial Neural Network (ANN) approach to simulate a complete scheme for distance protection of transmission lines. The protection technique is based on a modular approach whereby different neural network modules have been adopted for fault detection, fault classification and fault location. Three-phase voltage and current samples were utilized as inputs for the proposed scheme. The Alternative Transients Program (ATP) software was used to generate data for the transmission line (400 kV). The results obtained show that the global performance of the ANN architectures is highly satisfactory under a wide variety of different fault conditions.
40 citations
16 Dec 1998
TL;DR: In this paper, a fault-tolerant control method for additive or multiplicative actuator and component faults is developed. But the main advantage of this approach is that it is very easy to implement and it does not require a fault diagnosis module which reduce the computation time and avoid the problems caused by false alarms and delays in the fault detection and isolation.
Abstract: In this paper, a fault-tolerant control method is developed. This method makes possible the compensation of additive or multiplicative actuator and component faults. Its principle is based on the online estimation of a quantity which is equal to zero in the fault-free case and equal to the fault magnitude when a fault occurs on the system. Then, a new control law is added to the nominal one in order to compensate the fault effect on the system. The main advantage of this approach is that it is very easy to implement and it does not require a fault diagnosis module which reduce the computation time and avoid the problems caused by false alarms and delays in the fault detection and isolation. The performances of this method are tested in simulation on a pilot plant.
40 citations
03 Nov 1994
TL;DR: This work investigates how the partial scan principles from the synchronous test world can be adapted to asynchronous circuits, and shows that asynchronous partial scan design can be approached as a high-level design activity.
Abstract: We present a design-for-testability method for asynchronous circuits based on partial scan. More specifically, we investigate how the partial scan principles from the synchronous test world can be adapted to asynchronous circuits, and we show that asynchronous partial scan design can be approached as a high-level design activity. The method is demonstrated on an asynchronous error corrector for the DCC player. It has been used effectually in the production and application-mode tests of this 155 k transistor chip-set. In particular, it has led to high 99.9% stuck-at output fault coverage in short 64 msec test time at the expense of less than 3% additional area.
40 citations