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The finite element method (FEM) is widely accepted for the steady-state dynamic response analysis of acoustic systems. It exhibits almost no restrictions with respect to the geometrical features of these systems. However, its application is practically limited to the low-frequency range. An alternative method is the wave based method, which is an indirect(More)
This paper discusses the development of an advanced Iterative Learning Control (ILC) scheme for the filling of wet clutches. In the presented scheme, the appropriate actuator signal for a new clutch engagement is learned automatically based on the quality of previous engagements, such that time-consuming and cumbersome calibrations can be avoided. First, an(More)
Comfort in passenger cars can be improved by including a semi-active suspension system, controlled by online varying the damping based on measurements of the car motions. The selection of an appropriate control structure is crucial, since it determines the complexity of the control design and parameter tuning process. This paper presents a flexible(More)
A new acoustic actuator is designed and optimised to be used for active noise control. The active element is a flat acoustic actuator, consisting of two PVDF elements bonded on a honeycomb structure, and driven in opposite phase. The actuator can be useful in many applications. One of these, as illustrated in this article, is an active control system,(More)
During flight missions, space vehicles are subjected to a severe dynamic pressure loading when their rocketpropulsion systems are operated. This loading may be critical for the vehicle components, as well as for the payload such as satellites, which are usually very soft structures. The success of a satellite launching is determined, amongst other measures,(More)
The multivariable tracking accuracy on an automotive vibration test rig can be improved by extending the current industrial off-line iterative feedforward procedure with a real time feedback controller. This paper tests and validates three different MIMO-control schemes on an industrial test rig. First decentralized (or diagonal) control is used, which is a(More)
This paper presents a novel adaptive control scheme, with improved convergence rate, for the equalization of harmonic disturbances such as engine noise. First, modifications for improving convergence speed of the standard filtered-X LMS control are described. Equalization capabilities are then implemented, allowing the independent tuning of harmonics.(More)
A CUBE high frequency 6-DOF shaker table has recently been installed at the KULeuven Vehicle Technologies Laboratory. This paper describes a dual hardware-software approach for increased accuracy of Multi-Degree-Of-Freedom (MDOF) road reproduction experiments. On the KULeuven 6-DOF highfrequency shaker table, the hardware is calibrated using a mobile(More)