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This paper deals with the design of a residual generator for fault detection and isolation in the dynamic closed-loop systems based on the balance of energy which "enters" and "leaves" plants. The main contribution of this paper consists in developing a suitable fault detection and isolation technique to detect faults in single-input single-output(More)
The use of model-free control (MFC) spreads now more and more in industry. Nevertheless, control unknown delayed systems with this method remains an open problem. In this contribution, we present the use of model-free control in this context and we propose a solution to improve the effectiveness of this approach using a parameter estimation.
Control and data parallelism are two complementary but often mutually exclusive paradigms used to program massively parallel systems. We propose to encapsulate both control and data parallelism in regular classes of a sequential Object Oriented language: a SPMD programming model is used and thus no language extensions are needed, provided a Shared Virtual(More)
The work reported in this paper focuses on an optimal joint synthesis of controller and fault detection modules in the presence of model uncertainties. The presented method takes the interactions between control and diagnosis into account in order to make more efficient the fault detection performances. A quadratic criterion combining both control and(More)
A new method for evaluating the effects of model uncertainties on a detection residual in a Fault Detection (FD) procedure is proposed in this paper. Structured uncertainties are considered in a discrete-time interval model of the system. They are characterised by means of input disturbances and the covariance matrix associated with the nominal model(More)
The question Why to disperse? has been extensively investigated from an evolutionary perspective, and the strategy to disperse can be explained by several proximate and ultimate factors. The amazing diversity of dispersal mechanisms that animals, plants, fungi, peat mosses and other organisms have developed leads to the following question: How to disperse?(More)
This paper presents a new robust fault diagnosis algorithm for uncertain linear systems. The model uncertainties are taken into account to synthesise an optimal model for a detection procedure. This model, optimal with respect to a H<sub>2</sub> criterion, is developed for both black-box and grey-box modelling frameworks. A simulation example illustrates(More)
This paper deals with the problem of designing detection filters for FD1 in closed control loops. The methodology presented in here makes use of model-based approaches applied to linear systems. The residual generator proposed in the following is derived from the transfer functions of the system in open and closed loop, and is designed to be sensitive to(More)
This paper deals with the analysis of the fault-tolerant control (FTC) design in the presence of major actuator failures. In the presence of a complete loss of an actuator which is a major failure, the nominal control objectives cannot be reached anymore. Thus, degraded performances are re-defined in order to avoid huge loss in the system security and(More)
Unknown delayed systems are present in many domains and control this kind of systems remains a difficult problem. Indeed, we can find theses systems in physics, chemistry, aeronautics, etc. The main problem is that the delay is unknown, and so the model is not exactly well-known. By the way, the use of model-free control (MFC) remains a suitable solution to(More)