Digital implementation of continuous-time observers for nonlinear networked control systems

Abstract

We propose a digital implementation of continuous-time observers to networked control systems. We introduce a sufficiently small constant time step to construct the Euler model of continuous-time observers parameterized by this time step. Then, we propose a real-time iteration of this Euler model to implement continuous-time observers digitally and we give the sufficient conditions that the proposed digital implementation can estimate the state at sampling times semiglobally and practically. Numerical examples are also given to illustrate the proposed digital implementation of continuous-time observers.

Keywords

• nonlinear networked control systems
• digital implementation
• observers
• euler model
• ugas protocol
• semiglobal and practical convergence