Generation of analytical redundancy relations for fault detection and isolation of ultrasonic linear motor .

In this paper Bond Graph modeling, simulation and monitoring of ultrasonic linear motors are presented. Only the vibration of piezoelectric
ceramics and stator will be taken into account. Contact problems between stator and rotor (slider) are not treated here. So, standing and
travelling waves will be briefly presented since the majority of the motors use another wave type to generate the stator vibration and thus
obtain the elliptic trajectory of the points on the surface of the stator in the first time. Then, electric equivalent circuit will be presented with
the aim for giving a general idea of another way of graphical modeling of the vibrator introduced and developed. The simulations of an
ultrasonic linear motor are then performed and experimental results on a prototype built at the laboratory are presented. Finally, validation
of the Bond Graph method for modeling is carried out, comparing both simulation and experiment results. This paper describes the
application of the FDI approach to an electrical system. We demonstrate the FDI effectiveness with real data collected from our automotive
test. We introduce the analysis of the problem involved in the faults localization in this process. We propose a method of fault detection
applied to the diagnosis and to determine the gravity of a detected fault. We show the possibilities of application of the new approaches to
the complex system control.

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