This paper presents a fault-tolerant ALU (“FT-EALU”) based on time redundancy and reward/punishment-based learning approaches for real-time embedded systems that face limitations in hardware power consumption budgets. In this method, operations are diversified to three versions order correct permanent faults along with the transient ones. The diversities of considered FT-EALU provided by lightw...

The data-based fault detection and isolation (DBFDI) process becomes more potentially challenging if the faulty component of the system causes partial loss of data. In this paper, we present an iterative approach to DBFDI that is capable of recovering the model and detecting the fault pertaining to that particular cause of the model loss. The developedmethod is an expectation-maximization (EM) ...

Technology scaling and manufacturing process affect the performance of digital circuits, making them more vulnerable to environmental influences. Some defects are shown as delay faults therefore their testing is very important, mainly path delay faults. Such faults are tested over critical paths which have to be specified in a digital circuit. A problem of the critical paths selection is discus...

This paper presents a new observer design methodology for a time varying actuator fault estimation. A new linear matrix inequality (LMI) design algorithm is developed to tackle the limitations (e.g. equality constraint and robustness problems) of the well known so called fast adaptive fault estimation observer (FAFE). The FAFE is capable of estimating a wide range of time-varying actuator fault...

In safety-critical applications it is often possible to exploit software techniques to increase system’s faulttolerance. Common approaches are based on data redundancy to prevent data corruption during the software execution. Duplicating most critical variables only can significantly reduce the memo ry and performance overheads, while still guaranteeing very good results in terms of fault-toler...

Real time and accurate fault detection has attracted an increasing attention with a growing demand for higher operational efficiency and safety of industrial gas turbines as complex engineering systems. Current methods based on condition monitoring data have drawbacks in using both expert knowledge and quantitative information for detecting faults. On account of this reason, this paper proposes...

The NNW-trending Dena Fault, with 140 km length, cuts the major structures of Zagros Fold-Thrust Belt in Borujen region. The fault has divided the region in two zones, in which different structural, andmorphological features as well assedimentation and seismtectonic characteristics have developed. This study presents a new interpretation for the kinematics of Dena Fault based on field evidence....