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Mutual exclusion elements (MUTEXes) are fundamental components of asynchronous arbiters and are particularly critical to ensure metastable signals are properly filtered before reaching the arbiter outputs. However, despite their importance, the testability of these circuits is typically limited to functional testing. This paper discusses why this is not sufficient and addresses testability issues...
Power-related problems in at-speed scan testing have become more and more serious, since excessive IR-drop caused by excessive power consumption results in overtesting. There are two important factors in low-power testing: one is power estimation, the other is power reduction. Several estimation methods have been proposed based on the analysis of switching activity characteristics. In order to estimate...
A combination of several activities is required to solve a development task, but in the end, developer reports only part of it. It is difficult to understand whether all committed files were changed because of the reason in a given description. Software developers work on multiple tasks at once and often fail to distinguish them with separate commits because of their unknowingness, as well as of limitations...
Accurate models for electric power load forecasting are essential for the operation and planning of power system from technical as well as financial perspective. Paper proposes an approach for short term electric load forecasting based on parameters which have been arrived from past load data using artificial neural network based Non linear autoregressive network exogenous technique. Novel approach...
Under a U.S. Department of Energy grant, Diversified Technologies, Inc. (DTI) has developed a short pulse, solid-state Marx modulator. The modulator is designed for high efficiency in the 100 kV to 500 kV range, for currents up to 250 A, pulse lengths of 0.2 to 5.0 μs, and risetimes <300 ns. Key objectives of the development effort are modularity and scalability, combined with low cost and ease...
In this paper, non-intrusive load monitoring using a single point sensing and wavelet-based classification is presented and applied to a test system feeding two dynamic and two static three-phase loads. The features in the three-phase voltage and current signals are extracted by wavelet transform to decompose the original signals. The energy of the obtained wavelet coefficients at the detail levels...
Ever smaller nanotechnologies introduce new types of defects and fault mechanisms with negative influence on system on-chips (SoCs) reliability and operational life. This paper presents a fault diagnosis and repair procedure which is implemented into generic built-in self-repair architecture. The procedure utilizes on-line fault detection whereas repair is performed during off-line mode. Experimental...
Under a U.S. Department of Energy grant, Diversified Technologies, Inc. (DTI) has developed a short pulse, solid-state Marx modulator. The modulator is designed for high efficiency in the 100 kV to 500 kV range, for currents up to 250 A, pulse lengths of 0.2 to 5.0 µs, and risetimes <300 ns. Key objectives of the development effort are modularity and scalability, combined with low cost and ease...
With VLSI scaling, “no trouble found” or NTF parts passing at the component level, but failing at board level manufacturing testing have increased due to the dominance of soft defects over hard defects. An analysis of networking and DSP NTF components shows outlying behavior in not only product parameters but also on-die process parameters revealing new mitigation opportunities. The resulting yield...
Modern microprocessor-based relays are designed to provide robust and reliable protection even with disruptions in the dc supply, dc control circuits, or interconnected communications system. Noisy battery voltage supplies, interruptions in the dc supply, and communications interference are just a few of the challenges that relays encounter. This paper provides field cases that investigate protection...
Thyristor functioning as Arc Eliminator (AE) is presented in this paper, in order to protect low voltage devices such as circuit breakers from damage caused by arc fault. The AE operating mechanism is firstly illustrated, AE is usually working as an active standalone device together with other existing switchgears. The reason of choosing thyristor as AE is mainly because of its fast speed and relatively...
Active Sequential Hypothesis Testing (ASHT) is an extension of the classical sequential hypothesis testing problem with controls. Chernoff [1] proposed a policy called Procedure A and showed its asymptotic optimality as the cost of sampling was driven to zero. In this paper we study a further extension where we introduce costs for switching of actions. We show that a modification of Chernoff's Procedure...
This paper proposes a novel idea for incorporating dual threshold voltage for Bit swapping LFSR (BS-LFSR) in order to obtain highly power efficient pattern generators for built in self-test (BIST) based VLSI architecture. BIST is a hardware entity, which is capable of testing the circuit during manufacturing as well as in situ conditions. It make use of different types of random generators for test...
Message Passing Interfaces (MPI) plays an important role in parallel computing. Many parallel applications are implemented as MPI programs. The existing methods of bug detection for MPI programs have the shortage of providing both input and non-determinism coverage, leading to missed bugs. In this paper, we employ symbolic execution to ensure the input coverage, and propose an on-the-fly schedule...
Development of Len Bi-directional Inverter 15 kW (LenBDI15K-1P) and Len Battery Solar Charger 65 A (LenBSC65A-240V-BO) will be presented in this paper. These two products are used as power converter for 15kW solar off-grid power plant. The bi-directional inverter is using single phase full-bridge topology with a PI controller for inductor current and unbalanced d-q frame controller for voltage output...
The use of a Real-Time Operating System (RTOS) is now quite common in embedded systems because of the requirement for multi-tasking. We present the details of our port of the popular MicroC/OS-II RTOS to an avionics platform based on a PowerPC 7410 processor with multiple peripherals including RS422, MIL1553, digital IO and timers. Also, the systematic testing that we have carried out to validate...
Scan based transition delay fault (TDF) tests are generally applied in the launch-on-capture (LOC) mode because the scan enable control signal broadcast to all flip-flops on the die is expensive to implement as a fast switching signal needed to support at-speed launch-on-shift (LOS) tests. However, there is mounting evidence that even when applied at much slower speeds, LOS tests often detect a significant...
Method of proactive detection of faults in computer networks is proposed. For this purpose apply testing states of computer network components with Bayesian belief networks. This approach can be used for procedure of proactive detecting faults of computer network component. Method can be implemented in program application for detect faults in corporate computer networks.
In model-based design of cyber-physical systems, such as switched mixed-signal circuits or software-controlled physical systems, it is common to develop a sequence of system models of different fidelity and complexity, each appropriate for a particular design or verification task. In such a sequence, one model is often derived from the other by a process of simplification or implementation. E.g. a...
Local control center simulator to test an improved train control system using on-board control is discussed here. Improved train control system using on-board control developed to improve efficiency of train operation is a technology to control wayside objects directly from on-board controller. Introduction of this system will simplify wayside structures, leading to efficient and cost-effective train...
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