Off-line feed-forward and H-infinity feedback control on an industrial vibration rig

This paper discusses the improvement of the tracking accuracy on an automotive test rig by extending the industrial available offline controller with an ℋ∞ feedback controller. The improvement is shown by comparing the tracking error for both control schemes: the industrial controller on the one hand and the industrial controller with ℋ∞ feedback controller on the other hand. The ℋ∞ controller is designed based on a mixed sensitivity approach. After a theoretical analysis, the results are illustrated by simulations and experimental results on one axis of a hydraulic test rig which is used in the automotive industry for vibration comfort evaluations of new vehicle prototypes. © 2003 Elsevier Science Ltd. All rights reserved.status: publishe