Robust H∞ State Observer Design for a Class of Linear Switched Composite Large-Scale Systems

The problem of robust H_infin state observer design was considered for a class of switched composite large-scale systems. This paper was studied under the assumptions that there existed finite candidate state observers, and the gain matrices of observers were known, but none of the individual state observers made the error system stable. Based on convex combination technique, LMI method and switching among the finite candidate observers, the error system is shown to be stable with H_infin norm-bounded through the design of switching laws. The results show that the choice range of the gain matrices of state observers is extended by switching technique and simplifies the design of systems. Simulations validate the correctness of the results