The Popov criterion is applied to control system analysis and design. Nonlinear dynamic compensators (NDC) are int reduced which ensure absolute stability without penalizing the available feedback. 1 Multiwindow Controllers and Nonlinear Dynamic Compensation Ivlultiwindow controllers consisting of linear controllers with nonlinear windows [1,2] perform superior to linear controllers. They can b...

The construct of alexithymia as a vulnerability factor for substance use disorders (SUD) is under debate, because of conflicting research results regarding alexithymia as a state or trait phenomenon. The absolute and relative stability of alexithymia were evaluated in a pre-post design as part of a randomised controlled trial, controlling for several co-variates. Assessments were done with the ...

The main contribution of the paper is to show the equivalence between the following two approaches for obtaining suucient conditions for the robust stability of systems with structured uncertainties: (i) apply the classical absolute stability theory with multipliers; (ii) use modern theory, speciically, the upper bound obtained by Fan, Tits and Doyle IEEE TAC, Vol. 36, 25-38]. In particular, th...

Modern aircraft control systems contain the so-called rate limiter elements which are in fact incorporating the saturation function which is a bounded nonlinearity. In certain critical cases the so-called sector rotation a standard procedure in absolute stability leads to the fact that the sector conditions are broken outside a bounded domain. In order to apply standard results of the absolute ...

The paper presents a method to assure stability of the fuzzy control systems of the second order processes, based on a compensation of the input-output characteristic of the fuzzy blocks used in the PI fuzzy controllers. For this purpose is acting at the correction of the fuzzy control law by the action in parallel of a crisp block. Stability analysis of the control systems of the second order ...

This paper presents new results on the absolute exponential stability (AEST) of neural networks with a general class of partially Lipschitz continuous and monotone increasing activation functions under a mild condition that the interconnection matrix of the network system is additively diagonally stable; i.e., for any positive diagonal matrix 1, there exists a positive diagonal matrix 2 such th...

A bilateral teleoperation system comprises a human operator, a teleoperator, and an environment. The teleoperator consists of a master robot, a slave robot, their controllers, and a communication channel between the master and the slave. Since the exact models of the teleoperator’s terminations, namely the human operator and the environment, are typically unknown and/or time-varying, passivity ...