Off-line feed-forward and H_∞ feedback control on a vibration rig

摘要

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.