Título
Magneto-rheological damper modeling using LPV systems
Autor
VICENTE ALBERTO DIAZ SALAS
Nivel de Acceso
Acceso Abierto
Materias
Resumen o descripción
The present research is focused in the dynamical modeling of a Magneto-Rheological Damper as a semi-active
actuator. This device shows a complex behavior including non-linearities and hysteresis, features that are to be
emulated by a dynamical system, in order to express mathematically the conduct of this device under mechanical
vibrations.
The M R damper is part of a semi-active suspension system, and by the use of the information of the model
designed in this thesis it might be possible to produce a control design for the quarter of car system, in order to
regulate the vibrations received by the suspension, incrementing the comfort and safety of the passengers in the
vehicle.
In order to obtain experimental data from this semi-active device, a set of tests were performed, introducing
displacement and current excitation patterns into the shock absorber and measuring the dynamical response of it.
Using the experimental results, a set of state of the art models (Semi-Phenomenologial, Phenomenological,
Black-Box) were learned to reproduce this data.
This work proposes an LP V (Linear Parameter-Varying) system, as a model for the M R damper, which is capable
of reproduce both the non-linear and hysteretic behavior of the damper.The LP V model proposed has the capacity
to create a relationship between the main excitation variables, and the damper force, in a single structure. Due to
this feature, it might later be added to a bigger strategy, such as for control or observation. The model was designed
using an LP V polynomial system and an switching variable, which depends on the input velocity and current.
Output results shows a higher accuracy from the LP V proposed model, in comparison with the state of the art
models reviewed: it has ESR index average values below 0.04 while most of the studied models only achieve values
below 0.1.
The proposed model of this thesis provides a dynamical description of the Magneto-Rheological damper that
generates a link between the main input variables implicated on the damper, and the output force. This feature might
become an advantage to later provide an extended model of the quarter of car, and design a controller to regulate the
vibrations applied to the suspension.
Editor
Instituto Tecnológico y de Estudios Superiores de Monterrey
Fecha de publicación
1 de enero de 2011
Tipo de publicación
Tesis de maestría
Recurso de información
Formato
application/pdf
Idioma
Inglés
Repositorio Orígen
Repositorio Institucional del Tecnológico de Monterrey
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