A reduced-order adaptive state observer for DC–DC converters with unknown constant power load

W He, X Wang, MM Namazi, W Zhou… - Control Engineering …, 2024 - Elsevier
In this paper, main objective is to develop a reduced-order adaptive state observer (RASO)
for a large class of DC–DC converters with constant power load (CPL) to estimate their …

Comparative analysis of parameter convergence for several least-squares estimation schemes

Y Pan, T Shi, R Ortega - IEEE Transactions on Automatic …, 2023 - ieeexplore.ieee.org
Least-squares parameter estimation is important in system identification and adaptive
control owing to its enhanced performance and robustness compared to gradient-descent …

Detection of volatile organic compounds in adulterated tea using Fourier transform infrared spectroscopy and Proton-transfer-reaction mass spectrometry

C Yang, D Duan, C Dong, C Li, G Li, Y Zhou, Y Gu… - Food Chemistry, 2023 - Elsevier
Aroma is a key factor used to evaluate tea quality. Illegal traders usually add essence to
expired or substandard tea to improve its aroma so as to gain more profit. Traditional …

Relative Localization With Non-Persistent Excitation Using UWB-IMU Measurements

Y Wang, Q Yang, H Cui, H Fang - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
In multi-robot systems, accurate relative localization is indispensable for executing
collaborative tasks in GPS-denied environments. This paper focuses on the relative …

Real-time parameter estimation of polymer electrolyte membrane fuel cell in absence of excitation

A Cecilia, M Serra, R Costa-Castelló - International Journal of Hydrogen …, 2024 - Elsevier
Parameter estimation is crucial for polymer electrolyte membrane fuel cell monitoring and
control. Nonetheless, most parameter estimation algorithms rely on a persistence of …

Parameter estimation of some special classes of dynamical nonlinear systems with non-separable nonlinear parameterizations

R Ortega, A Bobtsov, R Costa-Castelló… - 2023 62nd IEEE …, 2023 - ieeexplore.ieee.org
In this paper we address the challenging problem of designing globally convergent
estimators for the parameters of nonlinear systems containing a non-separable exponential …

Online Parameter Estimation of the Polarization Curve of a Fuel Cell With Guaranteed Convergence Properties: Theoretical and Experimental Results

CA Beltrán, A Bobtsov, R Ortega… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
In this article, the problem of online parameter estimation of a proton exchange membrane
fuel cell (PEMFC) polarization curve, that is, the static relation between the voltage and the …

Robust adaptive consensus of perturbed Euler–Lagrange agents with unknown time varying disturbances

JG Romero, R Ortega, E Nuño, A Bobtsov - Automatica, 2025 - Elsevier
In this paper we consider the problem of leaderless consensus for networks of fully actuated
Euler–Lagrange agents perturbed by unknown additive disturbances. The network is an …

Parameter estimation of two classes of nonlinear systems with non-separable nonlinear parameterizations

R Ortega, A Bobtsov, N Nikolaev, R Costa-Castelló - Automatica, 2024 - Elsevier
In this paper we address the challenging problem of designing globally convergent
estimators for the parameters of nonlinear systems containing an exponential function …

On-line parameter estimation of the polarization curve of a fuel cell with guaranteed convergence properties: Theoretical and experimental results

C Beltran, A Bobtsov, R Ortega… - arxiv preprint arxiv …, 2023 - arxiv.org
In this paper, we address the problem of online parameter estimation of a Proton Exchange
Membrane Fuel Cell (PEMFC) polarization curve, that is the static relation between the …