Actuator and sensor faults can cause poor performance or even instability in dynamic systems. In flight control systems for aircraft and spacecraft, such faults can lead to loss of control and serious incidents. Therefore, rapid detection and identification of actuator and sensor faults is important for enhancing flight safety. One approach to fault detection and identification (FDI) in actuato...

We classify all path-delay faults of a combinational circuit into three categories: singly-testable (ST), multiply-testable (MT), and singly-testable dependent (ST-dependent). The classification uses any unaltered single stuck-at fault test generation tool. Only two runs of this tool on a model network derived from the original network are performed. As a by-product of this process, we generate...

This paper presents detection algorithms for baseline interconnection networks in the presence of multiple faults. We develop a procedure for finding the constraints of test vectors. This reduces the number of distinct test vectors and solves the problems efficiently. Furthermore, we design a new and systematic procedure for generating admissible permutations and reduction rules to find constra...

Any input vector that does not detect a fault is called an antitest for that fault Given two faults an in put vector that detects exactly one of those faults is an exclusive test A concurrent test for two faults must detect both faults The problems of gener ating these three types of tests involve detection of multiple faults We transform each of these problems into a single fault ATPG problem ...

ANSI/ISA S84.01-1996 and drafts IEC 61508/61511 are standards covering the design, operation, maintenance, and testing of safety instrumented systems (SIS). The standards stress the importance of minimizing potential faults in the SIS through good design and engineering practice. These faults include random hardware, systematic, and common cause faults. Common cause faults occur when a single f...

Many fault tolerant (FT) multistage interconnection networks have been devised that tolerate one or more faults. It is shown that the effects of some realistic faults can propagate through multiple stages and cause non-faulty components to behave erroneously; such faults with side effects can cause "FT" networks to lose their fault tolerance capabilities even due to a single fault. The PASM pro...

Faults need to be identified, localized, and removed from programs. Empirical studies show that coverage-based faults localizations effectively target bugs, even in the presence of multiple faults. Debugging is a time-consuming activity and thus it is beneficial to accelerate the process by employing appropriate techniques. The need for speeding up the debugging process is even more immense whe...

A model-based detection and isolation (FDI) system based on nonlinear state estimation and high filtering conditions is proposed. A better understanding of the residual trends, calculated from the difference between measurements and the extended Kalman filter (EKF) estimates, can be obtained when a fault occurs by developing a model that is able to predict the behavior of the residuals. This re...

This paper presents an Internal Model Control based structure to realise fault tolerance towards sensor faults. The proposed design implicitly embeds fault detection and controller elements requirements with considerations to stability and robustness towards uncertainties besides multiple faults environment. The performance of the proposed controller is demonstrated via multi input multi output...