This paper proposes a new method of detection and reconstruction the incipient fault fixed-wing actuators based on an adaptive sliding-mode observer. First, mathematical model aircraft is derived under certain assumptions, considering nonlinear terms system disturbances. Second, by introducing nonsingular coordinate transformation, faults are separated from For subsystem with no disturbances, L...

This work aims to explore and evaluate the nonreversible AC/DC five-level structure from point of view its operational safety: high electrical security on internal destruction continuity in operation. It only has low-voltage monotransistor cells (Si SiC 600 V max) is intrinsically tolerant imperfection control parasites, therefore naturally secure. The design lab-test fault monitoring diagnosis...

In view of the complexity and nonlinearity of rolling bearings, this paper presents a new supervised locally linear embedding method (R-NSLLE) for feature extraction. In general, traditional LLE can capture the local structure of a rolling bearing. However it may lead to limited effectiveness if data is sparse or non-uniformly distributed. Moreover, like other manifold learning algorithms, the ...

In this paper, we describe the design and implementation of an UDP-based socket that utilizes multiple network interface units connected through one or more networks. The socket is a middleware layer that provides abstract network APIs to hide low-level technical details from users. Parallel message fragmentation and reconstruction techniques and a reliable UDP-based protocol are introduced. Th...

In this contribution we investigate the problem of simultaneous observer based sensor fault reconstruction and state estimation of a class of linear time-varying (LTV) systems that are skew-symmetric models. The main features concern the use of a bank of observers to detect and isolate faulty sensors and in the same time provide unbiased state estimation. On the other hand, we introduced a swit...

considering recent developments in earthquake engineering, researchers has detected different effects of earthquakes far and near from the fault. investigations that have been done in this area show that near fault earthquakes have shorter time period comparing far fault earthquakes and in the velocity of near fault earthquakes, there are one or more impacting pulses with a big domain and perio...

Tool fault diagnosis in numerical control (NC) machines plays a significant role in ensuring manufacturing quality. However, current methods of tool fault diagnosis lack accuracy. Therefore, in the present paper, a fault diagnosis method was proposed based on stationary subspace analysis (SSA) and least squares support vector machine (LS-SVM) using only a single sensor. First, SSA was used to e...

This paper proposes a new method for the analysis and design of sliding mode observers for sensor fault reconstruction. The proposed scheme addresses one of the restrictions inherent in other sliding mode estimation approaches for sensor faults in the literature (which effectively require the open-loop system to be stable). For open-loop unstable systems, examples can be found, for certain comb...