3D12 Substructurability analysis for dynamically substructured systems(The 12th International Conference on Motion and Vibration Control)

Abstract

A substructurability analysis technique is proposed to evaluate the robustness and efficacy of dynamically substructured system (DSS) tests. DSS separates an engineering system into numerical and physical substructures. To ensure the success of the test, high-fidelity synchronization of the numerical and physical outputs must be ensured. However, it is noted that the dynamic properties of the substructures sometimes influence the synchronization stability and accuracy. Therefore, this study introduces the concept of substructurability and uses the Lyapunov function and linear matrix inequality to conduct the substructurability analysis, in order to evaluate the synchronization efficacy in advance. Analytical and numerical results based on a multivariable mass-spring-damper DSS are presented for illustration of the concepts.