Study On Component System State-space Model Synthesis Method

Due to the complex structure or mechanism model is very complicated in modeling and calculation analysis. Thus the component modal synthesis (CMS) method appeared, it divide the large structure model into multiple part and each part is analyzed independently, and then connect each part combination become the whole model through the connecting methods.Firstly this paper shows the general method of the structure or mechanism model space-stat equation is established based on the finite element modal analysis results. And on the basis, the connected component equations was got based on the coordinated by boundary conditions of the component part, which has the same displacement and equal force but opposite direction in the interface between the corresponding link node, and the connection of the submodel space state equation is become true.Finally the large antennas finite element is used as an example to be analyzed, and get each state-space equation, through the simulation results contrast verified the method that establish control state-space equation through structure analysis and the way of component connection are correct.