Continuous–discrete time observers for homogeneous nonlinear systems with sampled-data outputs

Global Exponential Sampled-Data Observers for Nonlinear Systems with Delayed Measurements

This paper presents new results concerning the observer design for wide classes of nonlinear systems with both sampled and delayed measurements. By using a small gain approach we provide sufficient conditions, which involve both the delay and the sampling period, ensuring exponential convergence of the observer system error. The proposed observer is robust with respect to measurement errors and...

Observers for invariant systems on Lie groups with biased input measurements and homogeneous outputs

This paper provides a new observer design methodology for invariant systems whose state evolves on a Lie group with outputs in a collection of related homogeneous spaces and where the measurement of system input is corrupted by an unknown constant bias. The key contribution of the paper is to study the combined state and input bias estimation problem in the general setting of Lie groups, a ques...

Observability and observers for nonlinear systems with time delays

In modern control theory, it has been a common practice to use ordinary differential equations to model dynamic systems. However, most of real systems have delays associated -normally introduced by natural response time (of sensors, actuators, etc, . . .) , and transport (of information, mass, etc, . . .) phenomenaand a more accurate model would require the use of functional-differential equati...

Output feedback sampled-data control of nonlinear systems using high-gain observers

Structural Properties of Multirate Sampled-Data Systems

The application of Networked Control Systems (NCS) in which sensory and control signals are transmitted via shared data communication networks, is growing significantly and these systems have been the subject of research during the last decade. On the other hand, multirate sampled data systems have been investigated since a long time. In this paper, conditions under which a networked control sy...