The paper presents an original method of designing state variable feedback in time delay systems assigning the dominant system poles on prescribed positions in the splane. For the feedback parameter adjustment a design method has been developed based on application of sensitivity functions, i.e. gradient derivatives of the characteristic quasipolynomial. The prescription of desired zeros as cru...

Time delay is a serious problem for bilateral teleoperation systems. Even a small time delay in a bilateral teleoperation system will generally degrade the system’s performance and cause instability. An important approach that guarantees stability for any fixed time delay is the wave variable method. In this paper we present some recent material dealing with teleoperation systems using wave var...

We propose a method for the reconstruction of time-delayed feedback systems from time series. The method is based on the analysis of the system response to a weak external disturbance having the form of rectangular pulses. To apply the method one must have access to the state variable of the system in order to perturb it and the time series of the driving signal and the system response having a...

In this paper, the controllability issues for discrete-time linear systems with delay in state are addressed. By introducing a new concept, the minimum controllability realization index (MinCRI), the controllability feature of delay systems is discussed. It is proved that the MinCRI of a system with state delay exists and is finite. Based on this result, a necessary and sufficient condition for...

This paper proposes a Time Delay nonlinear dynamic model of HIV-1 (Human Immunodeficiency Virus type 1), introducing the drug consumption efficiencies as the controlling input for the model. The paper also represents the fuzzy T-S representation and the corresponding Fuzzy T-S controller. The controller parameters are tuned using LMIs (Linear Matrix Inequalities). The main focus is on the stabi...