TY - GEN
T1 - Multi-DoF interface synchronization of real-time-hybrid-tests using a recursive-least-squares adaption law
T2 - 34th IMAC, A Conference and Exposition on Structural Dynamics, 2016
AU - Bartl, Andreas
AU - Mayet, Johannes
AU - Mahdiabadi, Morteza Karamooz
AU - Rixen, Daniel J.
N1 - Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2016.
PY - 2016
Y1 - 2016
N2 - Cyber Physical Testing or Real Time Hybrid Testing is a Hardware-In-The-Loop approach allowing for tests of structural components of complex machines with realistic boundary conditions by coupling virtual components. The need to actuate the physical interface makes the tests on structural systems challenging. In order to deal with stability and accuracy issues, we propose the use of an Adaptive Feed-Forward Cancellation approach with a Recursive Least Squares (RLS) adaption law for interface synchronization of harmonically excited systems. The interface forces are generated from multiple harmonic components of the excitation force. A RLS adaption law sets the amplitudes and phases of the harmonic interface force components and minimizes the interface gap. One major practical advantage of using a RLS adaption law is that only one forgetting factor has to be chosen compared to other adaption algorithms with various tuning parameters. As a consequence, it is possible to test systems with multiple interface DoF. In order to illustrate the performance and robustness of the proposed testing algorithm, the contribution includes a numerical investigation on a lumped mass system.
AB - Cyber Physical Testing or Real Time Hybrid Testing is a Hardware-In-The-Loop approach allowing for tests of structural components of complex machines with realistic boundary conditions by coupling virtual components. The need to actuate the physical interface makes the tests on structural systems challenging. In order to deal with stability and accuracy issues, we propose the use of an Adaptive Feed-Forward Cancellation approach with a Recursive Least Squares (RLS) adaption law for interface synchronization of harmonically excited systems. The interface forces are generated from multiple harmonic components of the excitation force. A RLS adaption law sets the amplitudes and phases of the harmonic interface force components and minimizes the interface gap. One major practical advantage of using a RLS adaption law is that only one forgetting factor has to be chosen compared to other adaption algorithms with various tuning parameters. As a consequence, it is possible to test systems with multiple interface DoF. In order to illustrate the performance and robustness of the proposed testing algorithm, the contribution includes a numerical investigation on a lumped mass system.
KW - Hardware-in-the-loop
KW - Hybrid testing
KW - Interface synchronization
KW - Real-time substructuring
KW - Recursive least squares
UR - https://www.scopus.com/pages/publications/84978757657
U2 - 10.1007/978-3-319-29763-7_2
DO - 10.1007/978-3-319-29763-7_2
M3 - Conference contribution
AN - SCOPUS:84978757657
SN - 9783319297620
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 7
EP - 14
BT - Dynamics of Coupled Structures - Proceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016
A2 - Rixen, Daniel
A2 - Allen, Matt
A2 - Mayes, Randall L.
PB - Springer New York LLC
Y2 - 25 January 2016 through 28 January 2016
ER -