#### Filter Results:

- Full text PDF available (73)

#### Publication Year

2003

2017

- This year (9)
- Last 5 years (115)
- Last 10 years (145)

#### Publication Type

#### Co-author

#### Journals and Conferences

#### Key Phrases

Learn More

- Denis V. Efimov, Tarek Raïssi, Ali Zolghadri
- CDC-ECE
- 2011

The problem of output stabilization of a class of nonlinear systems subject to parametric and signal uncertainties is studied. First, an interval observer is designed estimating the set of admissible values for the state. Next, it is proposed to design a control algorithm for the interval observer providing convergence to zero of the interval variables,… (More)

- Tarek Raïssi, Denis V. Efimov, Ali Zolghadri
- IEEE Trans. Automat. Contr.
- 2012

The goal of this technical note is to design interval observers for a class of nonlinear continuous-time systems. The first part of this work shows that it is usually possible to design an interval observer for linear systems by means of linear time-invariant changes of coordinates even if the system is not cooperative. This result is extended to a class of… (More)

- Alexey A. Bobtsov, Denis V. Efimov, Anton A. Pyrkin, Ali Zolghadri
- IEEE Trans. Automat. Contr.
- 2012

- Denis V. Efimov, Tarek Raïssi, Ali Zolghadri
- IEEE Trans. Automat. Contr.
- 2013

The problem of output stabilization of a class of nonlinear systems subject to parametric and signal uncertainties is studied. First, an interval observer is designed estimating the set of admissible values for the state. Next, it is proposed to design a control algorithm for the interval observer providing convergence of interval variables to zero, that… (More)

- Denis V. Efimov, Tarek Raïssi, Stanislav Chebotarev, Ali Zolghadri
- Automatica
- 2013

This paper is devoted to design of interval observers for Linear Time Varying (LTV) systems and a class of nonlinear time-varying systems in the output canonical form. An interval observer design is feasible if it is possible to calculate the observer gains making the estimation error dynamics cooperative and stable. It is shown that under some mild… (More)

- Denis V. Efimov, Alexander L. Fradkov
- SIAM J. Control and Optimization
- 2009

New Lyapunov-like conditions for oscillatority of dynamical systems in the sense of Yakubovich are proposed. Unlike previous results these conditions are applicable to nonlinear systems and allow for consideration of nonperiodic, e.g., chaotic modes. Upper and lower bounds for oscillations amplitude are obtained. The relation between the oscillatority… (More)

- D V Efimov
- Journal of mathematical biology
- 2011

The problem of controlled phase adjustment (resetting) for models of biological oscillators is considered. The proposed approach is based on oscillators excitation by a pulse, that results in the phase advancement or delay. Design procedure is presented for a series of pulses generation ensuring the required phase resetting. The solution is based on the… (More)

- Denis V. Efimov, Leonid M. Fridman, Tarek Raïssi, Ali Zolghadri, Ramatou Seydou
- Automatica
- 2012

In this paper, the problem of design of interval observers for Linear-Parameter-Varying (LPV) systems, containing non detectable or non strongly observable parts, is addressed. Firstly, a High Order Sliding Mode (HOSM) method is applied to the strongly observable subsystem, obtained by an appropriate change of coordinates, to estimate the state and its… (More)

- Denis V. Efimov, Wilfrid Perruquetti, Jean-Pierre Richard
- Int. J. Control
- 2013

The estimation problem for uncertain time-delay systems is addressed. A design method of reduced-order interval observers is proposed. The observer estimates the set of admissible values (the interval) for the state at each instant of time. The cases of known fixed delays and uncertain time-varying delays are analyzed. The proposed approach can be applied… (More)

- Anton A. Pyrkin, Alexey A. Bobtsov, Denis V. Efimov, Ali Zolghadri
- CDC-ECE
- 2011

The frequency estimation technique with guaranteed finite time of convergence to a given accuracy of identification is presented. The approach for a high frequency noise rejection is proposed. The possibility of switching algorithm introduction for estimation quality improvement is discussed. The proposed solution has order three, that is smaller than in… (More)