Dynamic substructuring, or real-time hybrid testing, is a technique that allows the experimental testing of critical elements of a structure within the context of the overall structure. The emulated structure is split into two parts: the region of interest containing the critical element, which is physically tested and the remainder of the structure, which is numerically modelled. For an accurate representation of the overall structure, it is crucial that the two parts interact, via a controller, in real-time with minimal errors at the interfaces between them. For example, the displacements at the interface may be passed from the numerical model to the controller, which imposes them on the physical substructure using hydraulic actuators (the transfer system). The forces required to impose these displacements may be in turn passed back to the numerical model. The adaptive minimal controller synthesis (MCS) controller has been implemented for substructuring of a one degree-of-freedom mass-spring-damper test and evaluation system, Neild [1, 2, 3], where a proportion of the mass was taken as the experimental substructure, and the remainder of the system numerically modelled. The potential advantage of such a controller over traditional linear controller is that it will be capable of adapting to unknown dynamics, disturbances and non-linearities in the experimental specimen. The work presented in this paper described the use of the MCS controller on a more complex substructuring system, consisting of a two degree-of-freedom mass-spring-damper system.
|Translated title of the contribution||Using Adaptive Control for Dynamic Substructuring Tests|
|Title of host publication||13th World Conference on Earthquake Engineering, Vancouver, BC, Canada, 1-6 August|
|Pages||1 - 15|
|Number of pages||15|
|Publication status||Published - Aug 2004|