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Multivariable feedforward control of vibrations in multi-axes flexible structures : applications to multi-axes piezoelectric actuators

Abstract : Multi-axes actuators are becoming more and more tempting to nanopositioning system designers as they enable them to save space, reduce energy consumption, increase dexterity and offer more modularity and freedom with fewer constraints to their applications. Some of these multi-axes actuators and systems exhibit however badly damped vibrations which strongly compromise their global performances. This thesis work exploits the advantages of the well-known feedforward input shaping techniques usually used to damp vibrations in monovariable (SISO) systems to present a new multivariable (MIMO) input shaping technique that can be used to damp vibrations in multi-axes systems. The approach that was used in this study is to extend a previous work that was done on multiple-input single-output (MISO) systems and generalize it for MIMO systems. The study demonstrates also the application of this newly developed technique on different piezoelectric actuators commonly used in nanopositioning systems.
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  • HAL Id : tel-02382026, version 1

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Yasser Al Hamidi. Multivariable feedforward control of vibrations in multi-axes flexible structures : applications to multi-axes piezoelectric actuators. Other. Université Bourgogne Franche-Comté, 2017. English. ⟨NNT : 2017UBFCD016⟩. ⟨tel-02382026⟩

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