On the applicability of state-of-the-art fault diagnosis methodologies to simple and complex systems

Autor: Cosmin Danut BOCANIALA, Severin BUMBARU, José Sá da COSTA

Publikováno v: Analele Universităţii "Dunărea de Jos" Galaţi: Fascicula III, Electrotehnică, Electronică, Automatică, Informatică, Vol 2005, Iss 1, Pp 32-37 (2005)

This paper performs an analysis on the applicability of state-of-the-art fault diagnosis methodologies to both simple and complex systems. Here, a complex system represents a system whose global behavior, which emerges from the interactions between i

Externí odkaz: https://doaj.org/article/37c281b6112d4de9a3e3ec63f06cad14

Constructing statistical models for arch dam deformation

Autor: J. Mata, António Tavares de Castro, José Sá da Costa

Publikováno v: Structural Control and Health Monitoring. 21:423-437

In its lifetime, a dam can be exposed to significant water level variations and seasonal environmental temperature changes. The structural safety control of a concrete dam is supported by monitoring activities and is based on models. In practice, the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b1f2b197771499ee43a87903eb14ae8b
https://doi.org/10.1002/stc.1575

Motion planning and actuator specialization in the control of active-flexible link robots

Autor: José Sá da Costa, Joao C. P. Reis

Publikováno v: Journal of Sound and Vibration. 331:3255-3270

Trajectory planning is a well-known open-loop control strategy to minimize residual vibrations in point-to-point tasks of systems featuring mechanical flexibility. However, the major drawback of open-loop control is its limitation in coping with mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::61c3ccae1de56154b6984561ce8eb07f
https://doi.org/10.1016/j.jsv.2012.03.004

Fractional reset control

Autor: Duarte Valério, José Sá da Costa

Publikováno v: Signal, Image and Video Processing. 6:495-501

Reset control is a nonlinear control technique that consists in resetting to zero the value of the integrals in a controller, whenever their input becomes zero. Fractional reset control is the application of reset control to a fractional controller.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f35afbadcff75820c09c8998ba715570
https://doi.org/10.1007/s11760-012-0336-y

Variable-order fractional derivatives and their numerical approximations

Autor: Duarte Valério, José Sá da Costa

Publikováno v: Signal Processing. 91:470-483

This paper addresses the different possible definitions of variable-order derivatives and their numerical approximations; both approximations based upon the definitions and approximations consisting of non-linear transfer functions (in particular com

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5394c5218dc042fd08da936b6b2984c5
https://doi.org/10.1016/j.sigpro.2010.04.006