91 citations · 102 across the 17 of their papers we have counts for
17 papers
Parameter identification algorithm for a LTV system with partially unknown state matrix
Olga Kozachek, Nikolay Nikolaev, Olga Slita +1
In this paper an adaptive state observer and parameter identification algorithm for a linear time-varying system are developed under condition that the state matrix of the system c…
Application of a nonlinear operator to identify an unknown parameter for a scalar regression equation with disturbance in the measurement channel
Vladimir Vorobyev, Alexey Bobtsov, Nikolay Nikolaev +1
The article investigates an algorithm for identifying an unknown constant parameter for a scalar regression model using a nonlinear operator that allows us to obtain a new regressi…
Adaptive observer of state variables of a nonlinear time varying system with unknown constant parameters
Olga Kozachek, Alexey Bobtsov, Nikolay Nikolaev
The paper proposes an adaptive observer of the state vector of a nonlinear time varying system based on measurements of the output variable. The problem is solved under the assumpt…
Synthesis of an adaptive observer of state variables for a linear stationary object in the presence of measurement noise
Alexey Bobtsov, Vladimir Virobyev, Nikolay Nikolaev +2
The article is devoted to the problem of synthesis of observers of state variables for linear stationary objects operating under conditions of noise or disturbances in the measurem…
Adaptive observer for a nonlinear system with partially unknown state matrix and delayed measurements
Olga Kozachek, Alexey Bobtsov, Nikolay Nikolaev
Problem of an adaptive state observer design for nonlinear system with unknown time-varying parameters and under condition of delayed measurements is considered. State observation…
Parameter Estimation of Two Classes of Nonlinear Systems with Non-separable Nonlinear Parameterizations
Romeo Ortega, Alexey Bobtsov, Ramon Costa-Castello +1
In this paper we address the challenging problem of designing globally convergent estimators for the parameters of nonlinear systems containing a non-separable exponential nonlinea…
Adaptive observer for a LTV system with partially unknown state matrix and delayed measurements
Alexey Bobtsov, Nikolay Nikolaev, Olga Slita +1
Problem of adaptive state observer synthesis for linear time-varying (LTV) system with unknown time-varying parameter and delayed output measurements is considered. State observati…
Adaptive state observer for linear time-varying system with partially unknown parameters of the state matrix and the input vector
Alexey Bobtsov, Nikolay Nikolaev, Romeo Ortega +2
The article deals with the problem of synthesis of an adaptive observer of state variables of a linear time-varying SISO dynamic system. It is assumed that the control signal and t…
An Almost Globally Stable Adaptive Phase-Locked Loop for Synchronization of a Grid-Connected Voltage Source Converter
Daniele Zonetti, Alexey Bobtsov, Romeo Ortega +2
In this paper we are interested in the problem of adaptive synchronization of a voltage source converter with a possibly weak grid with unknown angle and frequency, but knowledge o…
State Observation of Affine-in-the-States Systems with Unknown Time-Varying Parameters and Output Delay
Alexey Bobtsov, Nikolay Nikolaev, Romeo Ortega +2
In this paper we address the problem of adaptive state observation of affine-inthe-states time-varying systems with delayed measurements and unknown parameters. The development of…
Parameter Identification with Finite-Convergence Time Alertness Preservation
Romeo Ortega, Alexey Bobtsov, Nikolay Nikolaev
In this brief note we present two new parameter identifiers whose estimates converge in finite time under weak interval excitation assumptions. The main novelty is that, in contras…
State Observation of LTV Systems with Delayed Measurements: A Parameter Estimation-based Approach
Alexey Bobtsov, Nikolay Nikolaev, Romeo Ortega +1
In this paper we address the problem of state observation of linear time-varying systems with delayed measurements, which has attracted the attention of many researchers|see [7] an…
A Globally Convergent State Observer for Multimachine Power Systems with Lossy Lines
Alexey Bobtsov, Romeo Ortega, Nikolay Nikolaev +1
We present the first solution to the problem of estimation of the state of multimachine power systems with lossy transmission lines. We consider the classical three-dimensional \fl…
A Globally Stable Practically Implementable PI Passivity-based Controller for Switched Power Converters
Alexey Bobtsov, Romeo Ortega, Nikolay Nikolaev +1
In this paper we propose a PI passivity-based controller, applicable to a large class of switched power converters, that ensures global state regulation to a desired equilibrium po…
State Observation of Power Systems Equipped with Phasor Measurement Units: The Case of Fourth Order Flux-Decay Model
Alexey Bobtsov, Romeo Ortega, Nikolay Nikolaev +2
The problem of effective use of Phasor Measurement Units (PMUs) to enhance power systems awareness and security is a topic of key interest. The central question to solve is how to…
PMU-Based Decentralized Mixed Algebraic and Dynamic State Observation in Multi-Machine Power Systems
M. Nicolai L. Lorenz-Meyer, Alexey A. Bobtsov, Romeo Ortega +2
We propose a novel decentralized mixed algebraic and dynamic state observation method for multi-machine power systems with unknown inputs and equipped with Phasor Measurement Units…
Generalized Parameter Estimation-based Observers: Application to Power Systems and Chemical-Biological Reactors
Romeo Ortega, Alexey Bobtsov, Nikolay Nikolaev +2
In this paper we propose a new state observer design technique for nonlinear systems. It consists of an extension of the recently introduced parameter estimation-based observer, wh…