This paper studies the consensus tracking control for a class of uncertain high-order nonlinear multi-agent systems under an undirected leader-following architecture. A novel distributed finite-time adaptive framework is proposed based on barrier function. The cascaded high-gain observers are introduced to solve problem robust with unmeasured intermediate states in framework. schemes guarantee ...

In this work the problem of designing a reduced-order observer to infer the concentration in a catalytic reactor with temperature measurements and a simplified model is addressed. The process motion has a poor observability property, meaning that a carefully tuned high-order EKF technique is required to design an observer. Here, a constructive low-high gain estimation scheme is considered to ac...

Sliding-mode observers are known to be robust against presence of disturbances and modeling uncertainties [1−3]. Although these observers are highly robust with respect to noises in system inputs, it turned out that the corresponding stability degrades in systems that exhibit output noise or mixed uncertainties [4]. When the measurements are noisy, because the time derivatives cannot be accurat...

Amongst all these resistive forces in a modern passenger car, depending on the driving conditions and tire specifications, about 20–30% of total fuel consumption is related to rolling resistance. The resistance vehicle still rather unknown research should be conducted able estimate it reliably accurately. This accuracy particularly necessary at scale single reduce consumption, considering that ...

We address the problem of state observation for a system whose dynamics may involve poorly known, perhaps even nonlocally Lipschitz functions and whose output measurement may be corrupted by noise. It is known that one way to cope with all these uncertainties and noise is to use a high-gain observer with a gain adapted on-line. As a difference from most previous results, we study such a solutio...

This paper deals with the problem of unavailability of velocity measurements for the control of parallel manipulators for pick-and-place applications. As most controllers require the measurement of the joint positions as well as joint velocities, the latter need to be estimated. Three observers have been implemented while keeping the same nonlinear controller: a Lead-lag filter based observer, ...