Affiliations: University of São Paulo, Engineering School of
São Carlos, Dynamics Lab. Av. Trabalhador Sancarlense, 400, 13566-590
São Carlos-SP, Brasil | Katholieke Universiteit Leuven, Department of
Mechanical Engineering, Celestijnenlaan 300B, 3000 Leuven, Belgium
Abstract: The demands for improvement in sound quality and reduction of noise
generated by vehicles are constantly increasing, as well as the penalties for
space and weight of the control solutions. A promising approach to cope with
this challenge is the use of active structural-acoustic control. Usually, the
low frequency noise is transmitted into the vehicle's cabin through structural
paths, which raises the necessity of dealing with vibro-acoustic models. This
kind of models should allow the inclusion of sensors and actuators models, if
accurate performance indexes are to be accessed. The challenge thus resides in
deriving reasonable sized models that integrate structural, acoustic,
electrical components and the controller algorithm. The advantages of adequate
active control simulation strategies relies on the cost and time reduction in
the development phase. Therefore, the aim of this paper is to present a
methodology for simulating vibro-acoustic systems including this coupled model
in a closed loop control simulation framework that also takes into account the
interaction between the system and the control sensors/actuators. It is shown
that neglecting the sensor/actuator dynamics can lead to inaccurate performance
predictions.
