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We present a methodology for algorithmic generation of test signals for thedetection and diagnosis of a variety of short and open-circuit defects in analogcircuits. Prior algorithms have focused on test generation for known short oropen defect values. This places the burden of failure coverage on accurateanalysis of observed defects in known failed parts at high cost. In this work, we optimize the...
The testability of equipment has become the key factor affecting equipment availability, and detracts from readiness and mission success. To overcome the current problems associated with the analysis of equipment testability, such as non-comprehensive failure mode coverage, low fault detection rate, and low fault location accuracy, this paper presents a system testability modeling and analysis method...
With the ever-shrinking global geometries on a die and the concomitant rise in the complexity of interconnections in an on-chip network (NoC), the links used therein often suffer from various manufacturing defects such as shorts. These defects not only cause logical or functional errors but also give rise to various other system level failures such as duplication, misrouting, or dropping of a packet,...
A design optimization method based on dependency model is proposed for Built-in test design in Prognostics and Health Management. Firstly, simplify the dependency model, eliminate the redundant test and merge the fuzzy fault model. Secondly identify the minimum test vector matrix to each fault mode. Under the principles of reliability and costs, determine the optimal test vector, which is used as...
Test prioritization is an effective technique used to reduce the amount of work required to support regression testing in continuous integration development. It aims at finding an optimal order of tests that can detect regressions faster, potentially increasing the frequency of software releases. Prioritization techniques based on test execution history use the results of preceding executions to determine...
Multi-cycle scan-based tests allow more faults to be detected by keeping the circuit in functional mode for more than one clock cycle. Optimizing a multi-cycle test set can improve test quality and/or test application time. It is also possible to capture the primary outputs of a circuit multiple times between the scan operations. This ensures that if a fault is detected at the primary outputs, increasing...
Traditional bus-based systems-on-chip (SoCs) are turned to on-chip networks (NoCs) to overcome communication bottleneck. But, fabricating such NoC-based systems without any defect in interconnects or logics is a major challenge. This paper proposes a cost effective and scalable on-line test solution that detects and diagnoses intra-and inter-shorts in NoC interconnects. The proposed solution offers...
The process of testing any software system is an atrocious task which indeed consumes a ton of effort, and expensive also. Required effort and time to do adequate as well as effective testing get bigger, as the software gets more complexed that can lead to swarm over the project budget or some test cases left uncovered or delay in completion. A suitably generated test suite does not only locate errors...
In the early days of Systems Engineering, several methods were developed in industry to verify or validate designs, ensure that products could meet requirements and specifications, and later support those products. Those methods consisted of techniques and methodologies considered state-of-the-art at the time. Sometimes, those approaches could not resolve all issues. For that reason, newer methods...
This work presents an online testing scheme for detecting Single Missing Gate Faults (SMGF) in Exclusive-Or Sum of Product (ESOP) based reversible circuits consisting of both the positive and negative control MCT (Multiple control Toffoli) gates. In this technique, initially we transform an input function to its equivalent testable design, where some redundant gates and an ancillary line are appended...
Revolutionary changes in technology has brought a lots of different types of devices towards the Internet enabled services. It has become challenging to keep web sites functional and user friendly in a wide range of devices. Responsive Web Design (RWD) steps up to facilitate the necessary support to overcome those challenges with complex cascading style sheet (CSS) and JavaScript defined layouts....
Computer interlocking software is a real-time and safety-critical software, which can ensure the traveling safety and improve the transportation efficiency in the railway signal computer control systems. It is of great significance to evaluate the reliability of the interlocking software before putting them into operation. Most of the existing Non-Homogeneous Poisson Process (NHPP) models did not...
This paper presents a relaying algorithm based on Artificial Neural Network (ANN) technique for the protection of transmission line. A feed forward ANN with six inputs and eleven outputs has been developed for the detection and classification of faults. Data was generated by simulating a 400 kV, 50Hz, 100 km transmission line in PSCAD/EMTDC at a sampling frequency of 2 kHz. Three ANN configurations...
Software testing is a very crucial and important phase for (SDLC) software development life cycle. Software is being tested on its effectiveness for generating good quality software. Regression testing is done by considering the constraints of resources and in this phase optimization of test suite is very important and crucial. This paper mainly aims to make use of hybrid approach of meta-heuristics,...
Prioritization techniques have become an indispensable part of the software testing process. They are highly beneficial either due to resource or time constraints or when tester cannot execute the complete test set. Combinatorial test sets are generated with the aim to cover all the possible t-way interactions. In this paper, techniques to prioritize t-way test sets are studied. A comparative study...
Event Driven Software (EDS) testing is a very challenging task as a large number of events can be invoked by users. So far it is difficult to test all the user inputs invoked, therefore, test case prioritization is essentially required for giving more priority to test cases which reveal higher faults comparatively. We have proposed test case prioritization for EDS: as the Event Type, Interaction of...
Longitudinal rip of conveyor belts is a serious threat to safety production. Based on the machine vision technology, an algorithm used to find longitudinal rip of belts on-line from gray belt images directly is proposed. A gray image is first translated into a unidimensional vector. The unidimensional vector is further analyzed to obtain rip eigenfunctions. Then, faults of longitudinal rips are diagnosed...
Now a days, web based applications have become intricate, popular and crucial in every organization which requires high quality and high reliability of web based application. Quality of web based applications effects security and functionalities (including functional and non-functional requirements). Web applications are complex due to its heterogeneous and distributed nature. With the increasing...
This paper presents an approach to fault detection, identification, and state estimation (FDISE) for a dynamic system with abrupt total or partial failures. FDISE includes both decision and estimation and they are highly coupled. Decision includes fault detection and identification (FDI), while estimation is for failure magnitude and system state. Correct FDI benefits estimation and accurate estimation...
In order to upgrade the ability of health management, A hierarchical FDIR architecture design was proposed for the integrated avionics of micro-satellites. Extra hardware module was employed for the urgent fault detection and recovery, and built-in-test design was used for the lower level fault detection and isolation, a multi-layer built-in-test design was implemented with the satellite avionics...
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