Combination of map-based and adaptive feedforward control algorithms for active engine mounts. (November 2017)

• Record Type: Journal Article
• Authors: Hausberg, F; Plöchl, M; Rupp, M; Pfeffer, P; Hecker, S
• Is Part Of: Journal of vibration and control. Volume 23:Number 19(2017)
• Page Start: 3092
• Page End: 3107
• Publication Date: 2017-11
• Subjects: Active engine mounts -- active vibration control -- adaptive feedforward control; Vibration -- Periodicals; Damping (Mechanics) -- Periodicals; 620.3
• DOI: 10.1177/1077546315626323
• Languages: English
• ISSNs: 1077-5463

Abstract

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 parallel-maps, 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.