6 papers · 1 filter
An Algebraic State Observer for a Self-Sensing Active Magnetic Bearing System
Olga Zarina, Natalya Martyuhova, Alexey Bobtsov +1
The problem of designing a globally stable observer for a self-sensing active magnetic bearing system assuming only measurements of currents and voltages is addressed in this paper…
An Algebraic State Observer for a Class of Physical Systems
Alexey Bobtsov, Jose Guadalupe Romero, Romeo Ortega +1
In this paper we present a radically new approach to design state observers for nonlinear systems, with particular emphasis on physical ones. Our objective is to obtain an algebrai…
Adaptive Compensation of Nonlinear Friction in Mechanical Systems Without Velocity Measurement
Jose Guadalupe Romero, Romeo Ortega, Leyan Fang +1
Friction is an unavoidable phenomenon that exists in all mechanical systems incorporating parts with relative motion. It is well-known that friction is a serious impediment for pre…
Interturn Fault Detection in IPMSMs: Two Adaptive Observer-based Solutions
Romeo Ortega, Alexey Bobtsov, Leyan Fang +2
In this paper we address the problem of online detection of inter-turn short-circuit faults (ITSCFs) that occur in permanent magnet synchronous motors (PMSMs). We propose two solut…
Immersion of General Nonlinear Systems Into State-Affine Ones for the Design of Generalized Parameter Estimation-Based Observers: A Simple Algebraic Procedure
Romeo Ortega, Alexey Bobtsov, Jose Guadalupe Romero +1
Generalized parameter estimation-based observers have proven very successful to deal with systems described in state-affine form. In this paper, we enlarge the domain of applicabil…
State Observer for the Fourth-order Model of a Salient Pole Synchronous Generator with Stator Losses: Known and Partially Unknown Input Cases
Alexey Bobtsov, Romeo Ortega, Nicolai Lorenz-Meyer +1
In this paper we study the question of how to reconstruct the state of a power system using Phasor Measurement Units (PMUs). In our previous research we proved that this question h…