In this paper we investigate the observation problems for a class of nonlinear Lipschitz systems, subject to network constraints. In order to address this problem, an impulsive observer is designed, making use of the event–triggered technique in order to diminish the network usage. The proposed observer ensures practical state estimation. The output sampling is done on a periodic basis, but the...

A state observer is proposed for a class of multi-output nonlinear systems. The gain of this observer involves a design function that has to satisfy some mild conditions which are given. Different expressions of such a function are proposed. Of particular interest, it is shown that high gain observers and sliding mode like observers can be derived by considering particular expressions of the de...

Abstract: This paper presents a convex optimization method for observer-based mixed H2/H∞ control design of linear systems with time-varying state, input and output delays. Delaydependent sufficient conditions for the design of a desired observer-based control are given in terms of linear matrix inequalities (LMIs). An observer-based controller which guarantees asymptotic stability and a mixed ...

In this paper we propose a new observer design technique for nonlinear systems. It combines the well-known Kazantzis-Kravaris-Luenberger observer and the recently introduced parameter estimation-based observer, which become special cases of it—extending the realm of applicability of both methods. A second contribution of the paper is the proof that these designs can be recast as particular case...

This paper deals with an observer design for a P-Cell Chopper. The goal is to reduce drastically the number of sensors in such system by using an observer in order to estimate all the capacitor voltages. Furthermore, considering an instantaneous model of a p-cell chopper, an interconnected observer is designed in order to estimate the capacitor voltages. This is realized by using only the load ...

Abstract: This paper presents a convex optimisation method for observer-based control design of LPV neutral systems. Utilising the polynomials parameter-dependent quadratic functions and a suitable change of variables, the required sufficient conditions with high precision for the design of a desired observer-based control are established in terms of delay-dependent parameter-independent linear...

In this paper, we propose a new adaptive observer for a class of state-a¢ ne systems. More speci…cally we consider state a¢ ne systems that are in a special observable canonical form called the Generalised Jordan Observable Canonical (GJOC) form. The observer is then employed to estimate the biomass concentration in a bioreactor, using the measurements of the substrate concentration. Simulation...

A new nonlinear disturbance observer (NDO) for robotic manipulators is derived in this paper. The global exponential stability of the proposed disturbance observer (DO) is guaranteed by selecting design parameters, which depend on the maximum velocity and physical parameters of robotic manipulators. This new observer overcomes the disadvantages of existing DO’s, which are designed or analyzed b...

Several soft variable-structure controls are designed for the linear model of a hydraulic ac-tuator with an input constraint. It is shown that the plant can be controlled very fast using output feedback with a linear Luenberger observer. The influence of the observer on the performance of the soft variable-structure controls is examined. The performance is compared to that of a linear and a tim...