Pub Date : 2018-09-01DOI: 10.1109/AUTEST.2018.8532551
A. Yildirim, Edip Berker, M. E. Kayakesen
As the complexity of defense systems have increased in recent years; avionics and automated test systems have become more complex. Consequently, system engineering requirements demand robust requirement verification for the customer specifications and product quality. Traditional test system does not meet the demands like inconvenient data format, difficulty in test programs' reuse, inefficient use of available system resources, difficult error findings. The testing technology is growing continuously and rapidly. Frequently used automated test strategies are mainly based on software testing in software verification level. A software insensitive avionic system mostly comprises software modules at the unit level. When it comes to testing from subsystem to system level different circumstances emerge. System level testing has always been heavily dependent on human intervention and human judgment. Before emergence of system of systems concept most of the systems have their own boundaries for external interaction at human machine interface (HMI) level. Hence it has been natural that testing system functionality as a whole at HMI boundaries were carried out by human testers. However due to developments in software technologies and by approaching to automated system level testing problem as a collection of many self-containing diverse sub-problems; it can be seen that software industry has already created lots of tools to address each of these sub-problems without even aiming to solve them for automated system test approach. In this paper automated UAV system test approach will be given by definition and analysis of each problem and solution addressing this problem. New automated testing model is presented to be functional on system level with a combination of hardware and software. The automated testing will handle the testing complexity with faster execution time, reduced testing costs, eliminating user errors and will also to increased probability of detecting failures. Test automation with both simulators and real devices is used for execution of the tests, and for the comparison of actual outcomes with predicted outcomes. This paper introduces a novel approach for test automation implementation for avionic system validation at system level in Unmanned Air Vehicle (UAV) development with different scenarios.
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Pub Date : 2018-09-01DOI: 10.1109/AUTEST.2018.8532543
Randal Bailey
In this paper the author discusses techniques for Managing Factory Test Content to achieve ‘lean’ test solutions when confronting compressed design schedules, product maturation risks, and high volume. The paper highlights common obstacles to leaner testing in the presence of these forces, reveals how design-centric testing often creeps into defense factories, and explains why it can be difficult to remove. The paper describes how to address this challenge by placing focus on the establishment of minimal and sufficient Core Testing at the beginning of the product development process. The approach then carves out a category of Supplemental Testing that is “recurring yet temporary” for the purpose of mitigating risks during early production phases.
{"title":"Managing Factory Test Content under a Risk Management Framework","authors":"Randal Bailey","doi":"10.1109/AUTEST.2018.8532543","DOIUrl":"https://doi.org/10.1109/AUTEST.2018.8532543","url":null,"abstract":"In this paper the author discusses techniques for Managing Factory Test Content to achieve ‘lean’ test solutions when confronting compressed design schedules, product maturation risks, and high volume. The paper highlights common obstacles to leaner testing in the presence of these forces, reveals how design-centric testing often creeps into defense factories, and explains why it can be difficult to remove. The paper describes how to address this challenge by placing focus on the establishment of minimal and sufficient Core Testing at the beginning of the product development process. The approach then carves out a category of Supplemental Testing that is “recurring yet temporary” for the purpose of mitigating risks during early production phases.","PeriodicalId":384058,"journal":{"name":"2018 IEEE AUTOTESTCON","volume":"9 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133169564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/AUTEST.2018.8532534
Tzila Ajamian, S. Moussaoui, A. Dupret
Reflectometry is a structural health monitoring technique that allows to efficiently detect and localize electrical defects in wire networks. The main challenge in reflectometry is to improve the precision of defect localization and characterization, especially in the case of complex networks. The solution is to increase the frequency of the injected signal since the spatial resolution is inversely proportional to the injected signal frequency. However, such solution applicability is limited by the sampling capabilities of existing Analog-to-Digital Converters (ADC). In this paper, we propose a sampling approach based on Compressive Sensing (CS) in the context of reflectometry. The resulting methodology offers the possibility to inject high frequency signals and later to reconstruct the reflected waveform from a lower set of samples than that required in the classical sampling scheme. In that respect, a complex linear chirp signal is considered as a testing signal and injected in a complex Y-branches network with a hard defect at the edges. In order to have a sparse representation, the reflected chirp signal is decomposed in the Fractional Fourier Transform (FrFT) domain. The main result is that the new acquisition scheme allows the detection of multiple reflection peaks caused by the defects at a sampling frequency 10 times lower than the actual sampling rate with a relative fault location error of 2%.
{"title":"A Novel Compressive Sampling Approach for Detecting Hard Defects in Complex Wire Networks","authors":"Tzila Ajamian, S. Moussaoui, A. Dupret","doi":"10.1109/AUTEST.2018.8532534","DOIUrl":"https://doi.org/10.1109/AUTEST.2018.8532534","url":null,"abstract":"Reflectometry is a structural health monitoring technique that allows to efficiently detect and localize electrical defects in wire networks. The main challenge in reflectometry is to improve the precision of defect localization and characterization, especially in the case of complex networks. The solution is to increase the frequency of the injected signal since the spatial resolution is inversely proportional to the injected signal frequency. However, such solution applicability is limited by the sampling capabilities of existing Analog-to-Digital Converters (ADC). In this paper, we propose a sampling approach based on Compressive Sensing (CS) in the context of reflectometry. The resulting methodology offers the possibility to inject high frequency signals and later to reconstruct the reflected waveform from a lower set of samples than that required in the classical sampling scheme. In that respect, a complex linear chirp signal is considered as a testing signal and injected in a complex Y-branches network with a hard defect at the edges. In order to have a sparse representation, the reflected chirp signal is decomposed in the Fractional Fourier Transform (FrFT) domain. The main result is that the new acquisition scheme allows the detection of multiple reflection peaks caused by the defects at a sampling frequency 10 times lower than the actual sampling rate with a relative fault location error of 2%.","PeriodicalId":384058,"journal":{"name":"2018 IEEE AUTOTESTCON","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130862470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/AUTEST.2018.8532511
J. Orlet
Sensor technology has enabled seemingly unlimited ability to monitor temperature, humidity, air flow, power, voltage, current, etc. with small, inexpensive, and reliable devices. These devices are small enough to fit anywhere inside of just about every assembly/subassembly of a piece of Automatic Test Equipment (ATE). The question is what kind of measurements need to be made, where should they be located, and what benefit are they to the system and the operators? Like all engineering tasks, adding environmental monitoring sensors to ATE should be based on requirements, cost, and benefits. Operational requirements such as temperature, altitude, and humidity are the primary drivers. Next are operational interface requirements such as input power, shock, vibration, and Electromagnetic Interference (EMI)/ Electromagnetic Compatibility (EMC). Finally, reliability and maintainability (R&M) requirements are often overlooked in the selection and placement of environmental sensors. Just as important as the sensors themselves is finding a way to present the data in a logical fashion focused on creating an intuitive interface for the operators of the equipment as a part of comprehensive Health Monitoring approach at the system level. Too much data presented without consideration towards the operator could detract from the primary mission to repair and verify the Units Under Test (UUTs). The data must also be logged and stored in such a way to be able to understand and recreate scenarios to help track the environmental effects on the ATE over time. This paper discusses the design approach taken to evaluate system level requirements to determine the overall environmental monitor architecture. It also discusses the cost and complexity trade-offs mandatory to ensure a focused operator experience without affecting system reliability and system maintainability requirements. Finally, the paper will discuss the overall system level benefits of the environmental and health monitoring schemes as they are employed on several ATE systems.
{"title":"System Level Health and Environmental Monitoring for Automatic Test Equipment","authors":"J. Orlet","doi":"10.1109/AUTEST.2018.8532511","DOIUrl":"https://doi.org/10.1109/AUTEST.2018.8532511","url":null,"abstract":"Sensor technology has enabled seemingly unlimited ability to monitor temperature, humidity, air flow, power, voltage, current, etc. with small, inexpensive, and reliable devices. These devices are small enough to fit anywhere inside of just about every assembly/subassembly of a piece of Automatic Test Equipment (ATE). The question is what kind of measurements need to be made, where should they be located, and what benefit are they to the system and the operators? Like all engineering tasks, adding environmental monitoring sensors to ATE should be based on requirements, cost, and benefits. Operational requirements such as temperature, altitude, and humidity are the primary drivers. Next are operational interface requirements such as input power, shock, vibration, and Electromagnetic Interference (EMI)/ Electromagnetic Compatibility (EMC). Finally, reliability and maintainability (R&M) requirements are often overlooked in the selection and placement of environmental sensors. Just as important as the sensors themselves is finding a way to present the data in a logical fashion focused on creating an intuitive interface for the operators of the equipment as a part of comprehensive Health Monitoring approach at the system level. Too much data presented without consideration towards the operator could detract from the primary mission to repair and verify the Units Under Test (UUTs). The data must also be logged and stored in such a way to be able to understand and recreate scenarios to help track the environmental effects on the ATE over time. This paper discusses the design approach taken to evaluate system level requirements to determine the overall environmental monitor architecture. It also discusses the cost and complexity trade-offs mandatory to ensure a focused operator experience without affecting system reliability and system maintainability requirements. Finally, the paper will discuss the overall system level benefits of the environmental and health monitoring schemes as they are employed on several ATE systems.","PeriodicalId":384058,"journal":{"name":"2018 IEEE AUTOTESTCON","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128600774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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