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F. Hausberg, M. Plöchl, M. Rupp, P. Pfeffer, S. Hecker:
"Combination of map-based and adaptive feedforward control algorithms for active engine mounts";
Journal of Vibration and Control, 2016 (2016), S. 1 - 16.

Active engine mounts significantly contribute to ensure the comfort in vehicles with emission-reducing engine technologies,
e.g., cylinder-on-demand (COD), downsizing or turbochargers. To control active engine mounts, either adaptive or
non-adaptive feedforward control is commonly employed. Since both approaches have previously been treated separately,
this study proposes methods to connect them in terms of multiple-input-multiple-output Newton/FxLMS adaptive
filters with self-trained, grid-based look-up tables. The look-up tables are incorporated as parameter-maps or parallelmaps,
respectively. By combining the two feedforward control strategies, their inherent advantages, i.e., the adaptivity of
adaptive filtering and the direct impact as well as the tracking behavior of map-based feedforward control, are utilized.
The proposed control structures are illustrated by simulation and experimentally demonstrated in a vehicle with a V8-
COD engine. While both methods significantly reduce the convergence time of the adaptive filter, the parallel implementation
additionally improves the tracking behavior during fast engine run-ups.

Active engine mounts significantly contribute to ensure the comfort in vehicles with emission-reducing engine technologies,
e.g., cylinder-on-demand (COD), downsizing or turbochargers. To control active engine mounts, either adaptive or
non-adaptive feedforward control is commonly employed. Since both approaches have previously been treated separately,
this study proposes methods to connect them in terms of multiple-input-multiple-output Newton/FxLMS adaptive
filters with self-trained, grid-based look-up tables. The look-up tables are incorporated as parameter-maps or parallelmaps,
respectively. By combining the two feedforward control strategies, their inherent advantages, i.e., the adaptivity of
adaptive filtering and the direct impact as well as the tracking behavior of map-based feedforward control, are utilized.
The proposed control structures are illustrated by simulation and experimentally demonstrated in a vehicle with a V8-
COD engine. While both methods significantly reduce the convergence time of the adaptive filter, the parallel implementation
additionally improves the tracking behavior during fast engine run-ups.

Active engine mounts, active vibration control, adaptive feedforward control

http://dx.doi.org/10.1177/1077546315626323

http://publik.tuwien.ac.at/files/PubDat_248336.pdf