State Estimation For A Class Of Non Linear Systems

Due to the fact that many processes and systems in real world applications can be modeled as switched systems or multi-model systems, the synthesis of observers for these classes of systems has received a growing interest in the last decades. A second reason that justifies the interest for this research area comes from the fact that it can be applied to data encryption/decryption for telecommunication applications. In this thesis, we propose some methods for synthesizing state observers for switched systems and multi-model systems. By using new Lyapunov functions, these methods reduce the conservatism of the current approaches available in the literature. The results were verified on examples from literature.