In this chapter we study the fault detection problem using residual generators based upon high gain nonlinear observers in a differential algebraic framework. We analyze the stability of the residual generator when a fault occurs. We also consider two faults types: constant and time-varying faults. It is shown that under some mild conditions over the aforementioned faults the residual is differ...

Introduction: Quaternary basalts are one of the last signs of magmatism in Iran, some of which are related to deep fractures and active faults in the Quaternary. Quaternary basalts of Tabas are very important due to their high expansion and location in eastern Iran, and are located 140 km south east of Tabas city and according to the proposed divisions are part of the Lut zone. The aim of this...

This study investigates the hybrid fault-tolerant control (FTC) for hypersonic flight vehicles (HFVs) under rudder structure fault (RSF) and angle deviation (RADF). The nonlinear equations of model are linearised by fuzzy logic, external disturbance is approximated radial basis functions, which transforms classical HFV into a linear system. In case only RSF, state feedback system can passively ...

Bearing is a component that affects the performance of a rotating machine in order to be used properly. The purpose of using ball bearing is to reduce rotational friction and support radial and axial loads. Diagnosis of bearing vibration data is an important process to identify either the bearing is normal or defect. In this paper, we consider a single bearing system that consists of one normal...

Restrictions on right of way and increasing power demand has boosted development of six phase transmission. It offers a viable alternative for transmitting more power, without major modification in existing structure of three phase double circuit transmission system. Inspite of the advantages, low acceptance of six phase system is attributed to the unavailability of a proper protection scheme. ...

We present a new method to generate compact stuckat test sets that offer high defect coverage. The proposed method first selects the most effective patterns from a large N-detect pattern repository, by using a new output deviation-based metric. Then it embeds complete coverage of stuck-at faults within these patterns, and also uses the proposed metric to further improve their unmodeled defect c...

We examine the impact of the introduction of no-fault divorce law on the behaviour of never-married people. In particular, we evaluate how it affects an indicator of marital search intensity, the age at first marriage, in the context of a model where everyone has a different value of marriage. The heterogeneity of individual values implies that the legal change affects different people differen...

Even for electrical appliances, testing for illegal behaviors becomes difficult since the software system in an electrical appliance has already become large in size. Actually, the conventional method cannot generate sufficient test items for illegal behaviors. But testing illegal behaviors becomes more and more important, since the failure of electrical appliances would cause fatal effects on ...

1 On leave from Polytechnical University of Catalunya, Spain. Abstract A reduced intrinsic threshold voltage (VT) in addition to its variability has a direct impact on circuit design. Worstcase design styles assume that all transistors use the same worst-case VT whose average and standard deviation come from inter-die statistical variations. However, intra-die differences, such as random local ...