Results 131 to 140 of about 5,163 (159)

Robust Fault Estimation on a real quadrotor UAV using optimized Adaptive Thau Observer

2013 International Conference on Unmanned Aircraft Systems (ICUAS), 2013
As a result of modeling uncertainties, data decade unbalanceand noise, Fault Estimation (FE) for real quadrotor is rough with low accuracy when model observer based FE scheme-Adaptive Thau Observer(ATO) is applied. Based on these issues, this paper proposes a comprehensive optimization approach on FE accuracy for quadrotor using ATO.
Zhaohui Cen, Hassan Noura, Younes Al Younes   +2 more
openaire   +1 more source

An Adaptive Thau Observer for estimating the time-varying LOE fault of quadrotor actuators

2013 Conference on Control and Fault-Tolerant Systems (SysTol), 2013
Fault Estimation (FE), as the central part of an Active Fault Tolerant Control System (AFTCS), detects and estimates the magnitude of a fault when a fault/failure occurs. Especially for a quadrotor UAV (Unmanned Aerial Vehicle) system, it is necessary and helpful to estimate fault severity when its actuator has a partial loss of effectiveness (LOE) and
Zhaohui Cen, Hassan Noura
openaire   +1 more source

Nonlinear speed sensorless control of a surface-mounted PMSM based on a Thau observer

Electrical Engineering, 2016
This paper presents an alternative to solve the speed sensorless control of a surface-mounted synchronous motor based on localization of compact invariant sets (LCIS) and the Thau observer. Through the LCIS, the domain of attraction of the system dynamics is analyzed, allowing to obtain global knowledge about its operational bounds and its associated ...
Paul J. Campos, Luis N. Coria, Leonardo Trujillo   +2 more
openaire   +1 more source

FDI and FTC technique based on Thau observer and flatness theory for a quadrotor

2016 13th International Multi-Conference on Systems, Signals & Devices (SSD), 2016
This paper presents a technique of FDI and FTC based on Thau observers and flatness theory. The Thau observer allows to estimates the outputs of the system (sensor outputs) to develop the fault detection and isolation. The flatness allows to develop a fault tolerant control by generating a non-faulty analytically redundant measures.
Nizar Chelly, Hassen Mekki, Anis Bacha
openaire   +1 more source

On the Impossibility of Building a Thau Observer for a Nonlinear Model of an Induction Motor

IEEE Latin America Transactions, 2018
Given the simplicity of Thau observer, it could be attractive to try to build this kind of observer for an induction motor. However, in this paper, (metaheuristic) arguments are provided to explain why such purpose cannot be accomplished. In order to establish the impossibility of developing a Thau observer for the nonlinear model of an induction motor,
J.H. Pérez, E. Santiago, M. Figueroa, J. Pacheco, D. Ávila, P.A. Tamayo, J.E. Mancilla, L.A. Flores   +7 more
openaire   +1 more source

Velocity Estimation via Thau Observer for a PMSM in Chaotic Regime and its Physical Validation

IFAC Proceedings Volumes, 2012
Abstract In this paper, we design a Thau observer for the permanent-magnet synchronous motor (PMSM) model, which estimates the angular velocity from the measurement of currents. We apply some Bounds obtained from the localization of compact invariant sets of the system describing dynamics of a PMSM.
openaire   +1 more source

Observatoire du système karstique de Thau : observation, compréhension et modélisation de l’inversac de la source sous-marine de la Vise

2023
L’étang de Thau, situé au sud-ouest de Montpellier, constitue un hydrosystème dont les enjeux de gestion sont particulièrement sensibles : conchyliculture dans l’étang, alimentation en eau potable des villages par l’aquifère superficiel et activités thermales de la station de Balaruc-les-Bains par les venues d’eau souterraine profonde.
Maréchal, Jean-Christophe, Ladouche, Bernard, Lamotte, Claudine, Dewandel, Benoît, Hakoun, Vivien, Perrochet, Pierre   +5 more
openaire   +1 more source

Integrative oncology: Addressing the global challenges of cancer prevention and treatment

Ca-A Cancer Journal for Clinicians, 2022
Jun J Mao,, Msce, Lorenzo Cohen, Karen M Mustian   +2 more
exaly  

Obesity and adverse breast cancer risk and outcome: Mechanistic insights and strategies for intervention

Ca-A Cancer Journal for Clinicians, 2017
Cynthia Morata-Tarifa, Joyce M Slingerland   +1 more
exaly  

Multidisciplinary standards of care and recent progress in pancreatic ductal adenocarcinoma

Ca-A Cancer Journal for Clinicians, 2020
Aaron J Grossberg, William L Hwang, Anirban Maitra   +2 more
exaly