This paper considers the problem of fault detection and isolation while using zero or almost zero threshold. A number of different fault detection and isolation problems using exact or almost exact disturbance decoupling are formulated. Solvability conditions are given for the formulated design problems. The &step delayed fault detection problem is also considered for discrete-time systems.

The development of LSI technology makes it possible to partition a system into replaceable modules, and the advent of low-cost microprocessors makes possible networks of hundreds (or more) of interconnected modules. The problem of repairing such a system is becoming a matter of major importance in digital systems. In this paper a new procedure for defining an optimal design with respect to cost...

Detection of fault segments is an essential step for tracking main transverse faults. General observations from field studies as well as attitude measurements can give an overall understanding of the lengths of the segments, but these are not always sufficient to accurately identify and characterize them. In this study, we analyze P–T dihedra variations based on their eigenvalues to detect faul...

This paper considers fault estimation in nonlinear fractional order systems in observer form. For this aim, a step by step second order sliding mode observer is used. By means of a fractional inequality, the stability of the observer estimation errors is analyzed and some conditions are introduced to guarantee finite time convergence of estimation errors. Finally, in a numerical example, effect...

A major problem in transitioning fault tolerance practices to the practitioner community is a lack of a common view of what fault tolerance is, and how it can help in the design of reliable computer systems. This document takes a step towards making fault tolerance more understandable by proposing a conceptual framework. The framework provides a consistent vocabulary for fault tolerance concept...

in this paper, the consequences of well-known characteristics of near-fault ground motions, forward directivity and fling step, on the seismic response control is investigated. an integrated fuzzy rule-based control strategy for building structures incorporated with semi active friction damping system with amplifying braces (fdsab) is developed. the membership functions and fuzzy rules of fuzzy...

A method for the detection of fault lines of a surface only known at scattered data is presented. In particular, we use a technique for the detection of fault points, picking out and collecting in a set all the data points close to fault lines. To select these points we use a cardinal radial basis interpolation formula. Then, applying a powerful refinement technique, we discuss different method...

Fault attack is one of the most efficient side channel attacks and has attracted much attention in recent public cryptographic literatures. In this work we introduce a fault attack on the authenticated cipher ACORN v3. Our attack is done under the assumption that a fault is injected into an initial state of ACORN v3 randomly, and contains two main steps: fault locating and equation solving. At ...

It is not possible to do automatic testing with step motors in Hardware-in-the-Loop (HIL) simulators because motors may be overheated if working for a long time. Furthermore, possibilities for fault injection are limited and physical interaction is needed to inject faults like a breakdown that can actually be mimicked. We present an emulator in an FPGA that allows to emulate a step motor for au...