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Vibration Control for a Flexible Rail Car Body
Sep 18 2011 (7:41AM)
News Entry# 38959 MIMO Vibration Control for a Flexible Rail Car Body: Design and Experimental Validation
Posted by: rdb*^ Added by: rdb*^ Sep 18 2011 (7:41AM)
Car bodies of modern rail vehicles are designed as lightweight structures with the aim to minimize mass and thus operational energy demand. The central structural design requirements are given by the main static and dynamic loads. However, ride comfort becomes an increasingly important issue because the softer, more compliant structure exhibits low eigen frequencies that signiﬁcantly affect perceived passenger ride comfort. Various approaches have been taken to reduce comfort-relevant vibrations of the car body that can be grouped into vibration isolation and vibration damping approaches. The isolation approaches include passive, semi-active, and active concepts to decouple the car body from the bogeys and wheel sets. The active approaches are more complex and can affect the safety against derailment, but potentially lead to improved isolation performance over their passive counterparts (see Foo & Goodall (2000) and Stribersky et al. (1998)). The complementary vibration damping approaches intend to increase the elastic eigenmodes’ damping...