Dynamic response identification based on state estimation and operational modal analysis applied to a truck side skirt
2016 (English)Manuscript (preprint) (Other academic)
This work presents an experimental verification of a fixed-lag smoother for solving joint state and input estimation problems.Sparse acceleration measurements from a truck side skirt excited by road induced vibrations from the Scania vibration test track are analysed. The system model is obtained experimentally from an operational modal analysis, reducing the modelling errors and avoiding the need of a numerical model. The work is focused on estimating the motion of the side skirt in positions where no measurements are available. The estimated motions are compared to those of a joint input-state estimation algorithm and to the actual measured motion. Two sensor configurations are studied: one where the number of measurement sensors is high compared to the number of estimated motions and participating modes, and another where the number of sensors are reduced. With the first configuration, both algorithms perform very well. With the reduced numbers of sensors, the fixed-lag smoother excels the joint input-state estimator in capturing the individual motion of each position on the side skirt.
Place, publisher, year, edition, pages
2016. , 22 p.
Joint input-state estimation, Fixed-lag smoother, Experimental verification, Structural dynamics
Other Mechanical Engineering
Research subject Solid Mechanics
IdentifiersURN: urn:nbn:se:kth:diva-193053OAI: oai:DiVA.org:kth-193053DiVA: diva2:974819
QC 201609282016-09-272016-09-272016-09-28Bibliographically approved