This paper presents an approach to fault tolerant control based on the sensor masking principle in the case of wireless networked control systems. With wireless transmission, packet losses act as sensor faults. In the presence of such faults, the faulty measurements corrupt directly the behaviour of closed-loop systems. Since the controller aims at cancelling the error between the measurement a...

One of the key benefits or future hardware implementations of certain artificial neural networks (ANN's) is their apparently "built-in" fault tolerance which makes them potential candidates for critical tasks with high reliability requirements. This paper investigates the fault-tolerance characteristics of time-continuous, recurrent ANN's that can be used to solve optimization problems. The pri...

This paper considers fault estimation (FE) and fault-tolerant control (FTC) for linear parameter varying systems with actuator sensor faults, uncertainties, disturbances. The inevitable coupling between the FE FTC functions needs to be taken into account in design ensure overall FE-based closed-loop system performance robustness. proposes an iterative strategy achieve robust integration of by l...

Subject of research: methods for selective determination an outgoing line with a single-phase earth fault based on the relative measurement higher harmonics.
 Purpose to develop method software filtering high-frequency components and identifying ground fault.
 Object distribution networks 6-35 kV.
 Methods wavelet-transformation zero-sequence currents voltages.
 Main results...

This thesis addresses issues in building fault-tolerant distributed real-time systems. Such systems are increasingly deployed in automotive and avionics applications. We focus on the design and validation of fault tolerance mechanisms. From the design viewpoint, we develop the notion of multi-layer fault tolerance. A fault-tolerant distributed system contains a set of mechanisms that provide er...

Both torque ripple and current harmonics are enlarged due to single-phase open-circuit fault of five-phase permanent magnet synchronous motor (FPMSM). Based on chaotic-particle swarm, an adaptive optimization tolerant control algorithm is proposed for the FPMSM current. First, Park Clarke matrices modified in coordinate transformation process. A reduced-order decoupling matrix obtained under st...

An approach to fault detection (FD) in industrial measurement systems is proposed in this paper which includes an identification strategy for early detection of the appearance of a fault. This approach is model based, i.e. nominal models are used which represent the fault-free state of the on-line measured process. This approach is also suitable for off-line FD. The framework that combines FD w...

In this paper, an original method for bearing fault detection in high speed synchronous machines is presented. This method is based on the statistical process of Welch's periodogram of the stator currents in order to obtain stable and normalized fault indicators. The principle of the method is to statistically compare the current spectrum to a healthy reference so as to quantify the changes ove...

We present a debugger for concurrent logic programs that works on the channel-oriented principle: it allows program bugs to be diagnosed by probing values of variables, rather than by the more traditional method of tracing the execution of processes. A key feature of our debugger is that, like Shapiro’s algorithmic debugging technique, it searches for a fault in an “intelligent” manner, asking ...

This paper presents a precision fault reconstruction scheme for a class of nonlinear systems involving unknown input disturbances. First, using the coordinate transformation algorithm, the disturbances and faults of the system are fully decoupled. Therefore, it is possible to eliminate the influence of disturbances to the system, namely, better disturbances robustness. On this basis, the design...