91 citations · 102 across the 17 of their papers we have counts for
7 papers · 1 filter
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…