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Conception d'un distributeur de servocommande hydromécanique sous critères de coût et de mixabilité

Abstract : The servoactuators assist the pilot to control the helicopter with accuracy and small pilot loads. This work concerns the design and manufacturing of hydraulically supplied and mechanically signaled servoactuators. The valve is the most costly servoactuator device. It is difficult to design and to manufacture. This device is also the one that mainly influences the servoactuator performance. The thesis main objective is to design a low cost servoactuator which has similar performances as one of the servoactuators already in service. This objective has been spread in three steps:  modelling of servoactuator and in particular the power controller stage of the servoactuator  model-based design of the valve  manufacturing of servoactuator prototypes and validation through tests In the first chapter some technological solutions for the future design are selected for the servoactuator and the valve to meet the requirements of the application. The second chapter presents the models and tools for the design and manufacturing of the servoactuator valve. The third chapter deals with the pre-design and the manufacturing of the first valves. The chosen methodology for the valve pre-design is model-based. A new low cost manufacturing process is developed based on the asymptotic representation of the pressure gain characteristic curve. The fourth chapter presents the final design of the valve. As the assessment of the mixability criterion is not concluding, a new valve geometry is proposed. The design is updated using a model-based approach and validated by experimental tests.
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https://pastel.archives-ouvertes.fr/pastel-00590711
Contributor : Thibaut Marger <>
Submitted on : Wednesday, May 4, 2011 - 6:23:08 PM
Last modification on : Monday, March 30, 2020 - 8:48:59 AM
Long-term archiving on: : Friday, August 5, 2011 - 2:39:26 AM

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  • HAL Id : pastel-00590711, version 1

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Thibaut Marger. Conception d'un distributeur de servocommande hydromécanique sous critères de coût et de mixabilité. Génie mécanique [physics.class-ph]. Arts et Métiers ParisTech, 2010. Français. ⟨NNT : 2010ENAM0052⟩. ⟨pastel-00590711⟩

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