Results 201 to 210 of about 509,267 (235)

Lock-in Amplifier Applications for Fault Isolation

International Symposium for Testing and Failure Analysis
Abstract This paper describes how lock-in amplifiers and boxcar averaging can overcome limitations in conventional fault isolation techniques for microelectronic testing. Our approach achieves superior results compared to traditional spectrum analyzer methods through three key applications.
Sukho Lee, Kristofor Dickson
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Fault-based Built-in Self-test and Evaluation of Phase Locked Loops

ACM Transactions on Design Automation of Electronic Systems, 2021
With the increasing pressure to obtain near-zero defect rates for the automotive industry, there is a need to explore built-in self-test and other non-traditional test techniques for embedded mixed-signal components, such as PLLs, DC-DC converters, and data converters.
Mehmet Ince, Ender Yilmaz, Wei Fu, Joonsung Park, Krishnaswamy Nagaraj, LeRoy Winemberg, Sule Ozev   +6 more
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The Effects of Locked-in Pressure on the Mechanics of Faulting

Seismological Research Letters, 2008
Static friction and dynamic friction between two surfaces are generally proportional to the normal force between the surfaces. Pressure in the Earth is approximately equal to the lithostatic overburden. It follows that the failure strength of a fault and its resistance to sliding should increase with depth below the surface. Or should it?
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Fault tolerant gaits of legged robots for locked joint failures

SMC 2000 Conference Proceedings. 2000 IEEE International Conference on Systems, Man and Cybernetics. 'Cybernetics Evolving to Systems, Humans, Organizations, and their Complex Interactions' (Cat. No.00CH37166), 2002
In this paper, fault detection and tolerance in static walking of legged robots are addressed. A kind of fault events, locked joint failure, is defined and its properties are investigated in the frame of gait study and robot kinematics. For the purpose of tolerating a locked joint failure, an algorithm of fault tolerant gaits for a quadruped robot is ...
Jung-Min Yang 0001, D.-I. Ko, Kwang-Hyun Shim, S.-K. Hwang   +3 more
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Allowing faults out of lock-up

Science, 2015
Geophysics![Figure][1] Relict microatoll on southeastern island of Simeulue, Sumatra PHOTO: ARON J. MELTZNER/EARTH OBSERVATORY OF SINGAPORE The crust around a locked, earthquake-prone fault responds to the two sides pulling in opposite directions by bowing and bulging over time. Meltzner et al. and Wesson et al.
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Analysis of Software-Implemented Fault Tolerance: Case Study on Smart Lock

2020 IEEE East-West Design & Test Symposium (EWDTS), 2020
In our research, we focus on Fault-Tolerant system design and testing. Recently, we also studied Fault Tolerance against random and deliberate faults of electronic smart locks. In our last research, we tested Software-Implemented Fault Tolerance in the controller of a smart electronic lock.
Jakub Lojda, Richard Panek, Jakub Podivinsky, Ondrej Cekan, Martin Krcma, Zdenek Kotásek   +5 more
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An FDI approach for aircraft actuator lock-in-place fault

2007 IEEE International Conference on Control and Automation, 2007
In this paper, an adaptive observer approach is developed to detect and isolate aircraft actuator faults. Particularly, the fault of actuator locked in place is considered. In a multiple-model scheme, a bank of parallel observers are constructed, each of which is based on a model that describes the system in the presence of a particular actuator fault.
null Dan Wang, null Jialiang Huang, null Ge Guo, null Shuanghe Yu   +3 more
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Fault Localization and Functional Testing of ICs by Lock-in Thermography

International Symposium for Testing and Failure Analysis, 2002
Abstract In this paper new thermographic techniques with significant improved temperature and/or spatial resolution are presented and compared with existing techniques. In infrared (IR) lock-in thermography heat sources in an electronic device are periodically activated electrically, and the surface is imaged by a free-running IR camera.
O. Breitenstein, J.P. Rakotoniaina, F. Altmann, J. Schulz, G. Linse   +4 more
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Fault-tolerant gait generation for locked joint failures

SMC'03 Conference Proceedings. 2003 IEEE International Conference on Systems, Man and Cybernetics. Conference Theme - System Security and Assurance (Cat. No.03CH37483), 2004
This paper addresses the issue of tolerating a locked joint failure in gait planning for hexapod robots which have symmetric structures and legs in the form of an articulated arm with three revolute joints. A locked joint failure is one for which a joint cannot move and is locked in place. If a failed joint is locked, the workspace of the resulting leg
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A connectionist model for lock coil rope fault prediction

Insight - Non-Destructive Testing and Condition Monitoring, 2008
In this paper, a neural network-based method of wire rope fault prediction in a system is proposed. This method is developed based on past observations on various wire rope parameters for lock coil rope, for example number of rope used in the system, period of test, number of faults, etc.
D Basak, S Pal, P Basak, D Palit, D Chandra Patranabis   +4 more
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