Dynamic sub-structuring with passive state-space components

Paper i proceeding, 2014

Component synthesis regards modeling of complex dynamic structures by decomposing the structure into smaller simpler components, modeling each component or sub-structure individually and then assemble the components to construct the complete dynamic structure model. The methodology allows for a mixture of experimental and analytical models of sub-structures to be assembled into a coupled system model. There are a number of component synthesis methods that stands at disposal. In this paper we use state-space component synthesis to assemble two state-space sub-components of a test rig. One sub-component model is based on measured frequency response data and the other is based on a Finite Element (FE) modeled component and the coupled structure is validated against reference measurements. The paper also investigates and shows the necessity of physically consistent experimentally derived sub-system models in component synthesis and presents a new methodology for passivity enforcement on state-space models.