Bibliografias temáticas / Adaptive obsever

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Literatura científica selecionada sobre o tema "Adaptive obsever"

Autor: Grafiati

Publicado: 8 de fevereiro de 2025

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Artigos de revistas sobre o assunto "Adaptive obsever"

Souaihia, Maamar, Bachir Belmadani e Rachid Taleb. "A robust state of charge estimation for multiple models of lead acid battery using adaptive extended Kalman filter". Bulletin of Electrical Engineering and Informatics 9, n.º 1 (1 de fevereiro de 2020): 1–11. http://dx.doi.org/10.11591/eei.v9i1.1486.

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An accurate estimation technique of the state of charge (SOC) of batteries is an essential task of the battery management system. The adaptive Kalman filter (AEKF) has been used as an obsever to investigate the SOC estimation effectiveness. Therefore, The SOC is a reflexion of the chemistry of the cell which it is the key parameter for the battery management system. It is very complex to monitor the SOC and control the internal states of the cell. Three battery models are proposed and their state space models have been established, their parameters were identified by applying the least square method. However, the SOC estimation accuracy of the battery depends on the model and the efficiency of the algorithm. In this paper, AEKF technique is presented to estimate the SOC of Lead acid battery. The experimental data is used to identify the parameters of the three models and used to build different open circuit voltage–state of charge (OCV-SOC) functions relationship. The results shows that the SOC estimation based-model which has been built by hight order RC model can effectively limit the error, hence guaranty the accuracy and robustness.

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Kim, Hyeon-Sik, Seung-Ki Sul, Hyunjae Yoo e Jaeyoon Oh. "Distortion-Minimizing Flux Observer for IPMSM Based on Frequency-Adaptive Observers". IEEE Transactions on Power Electronics 35, n.º 2 (fevereiro de 2020): 2077–87. http://dx.doi.org/10.1109/tpel.2019.2920691.

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Porter, La Moyne L., e Kevin M. Passino. "Genetic adaptive observers". Engineering Applications of Artificial Intelligence 8, n.º 3 (junho de 1995): 261–69. http://dx.doi.org/10.1016/0952-1976(95)00007-n.

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Benzemrane, Khadidja, Gilney Damm e Giovanni L. Santosuosso. "Adaptive Observer and Kalman Filtering". IFAC Proceedings Volumes 41, n.º 2 (2008): 3865–70. http://dx.doi.org/10.3182/20080706-5-kr-1001.00650.

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HAO, Shuanghui, e Teruo TUSJI. "Adaptive Nonlinear Control Using Observer". Transactions of the Society of Instrument and Control Engineers 34, n.º 4 (1998): 318–25. http://dx.doi.org/10.9746/sicetr1965.34.318.

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Yang, Jong-Kun, Chang-Ho Hyun, Jae-Hun Kim, Euntai Kim e Mignon Park. "Indirect Adaptive Fuzzy Observer Design". Journal of Korean Institute of Intelligent Systems 14, n.º 7 (1 de dezembro de 2004): 927–33. http://dx.doi.org/10.5391/jkiis.2004.14.7.927.

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Eaton, Ray. "REDUCED ORDER ADAPTIVE OBSERVER BACKSTEPPING". IFAC Proceedings Volumes 35, n.º 1 (2002): 1–6. http://dx.doi.org/10.3182/20020721-6-es-1901.00081.

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Paesa, D., A. Baños e C. Sagues. "Optimal reset adaptive observer design". Systems & Control Letters 60, n.º 10 (outubro de 2011): 877–83. http://dx.doi.org/10.1016/j.sysconle.2011.07.007.

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Wei, Yi-Heng, Zhen-Yuan Sun, Yang-Sheng Hu e Yong Wang. "On fractional order adaptive observer". International Journal of Automation and Computing 12, n.º 6 (6 de novembro de 2015): 664–70. http://dx.doi.org/10.1007/s11633-015-0929-3.

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Marino, Riccardo, e Patrizio Tomei. "Adaptive notch filters are local adaptive observers". International Journal of Adaptive Control and Signal Processing 30, n.º 1 (1 de junho de 2015): 128–46. http://dx.doi.org/10.1002/acs.2582.

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Teses / dissertações sobre o assunto "Adaptive obsever"

Ghassani, Rashad. "Commande Unifiée des Machines à Courant Alternatif". Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSEP153.

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Les lois de contrôle des machines à courant alternatif, asynchrones et synchrones, sont aujourd'hui assez mûres. Le contrôle vectoriel est un cadre général pour la modélisation, l'analyse et le contrôle des machines à courant alternatif. Une approche de synthèse basée sur le modèle est souvent utilisée, et les paramètres de la loi de commande sont définis en fonction des paramètres de la machine. Un variateur de vitesse standard est utilisé dans la plupart des applications industrielles pour contrôler la vitesse du moteur alimenté par le réseau électrique. Dans ce cas, le variateur est appelé « variateur polyvalent ». Selon le type de machine à courant alternatif, un contrôleur spécifique est nécessaire. Pour ce faire, les fabricants de variateurs devront inclure différentes lois de commande dans leur variateur. Par conséquent, l'ajout de ces lois nécessitera beaucoup de mémoire et de capacité de calcul. En outre, le changement de type de machine modifierait la loi de commande. Ce problème peut entraîner de nombreuses difficultés, telles que des coûts d'installation plus élevés, des délais de mise en service et des réglages supplémentaires. C'est pourquoi la recherche d'un « universal drive » se poursuit depuis plus d'une décennie. Cette thèse présente une étude approfondie sur le sujet de la commande unifiée pour les machines à courant alternatif. Notre objectif est d'innover une loi de commande unifiée pour les machines électriques, en particulier les machines asynchrones et synchrones, à utiliser dans les futurs produits de variateurs de vitesse à usage général. Dans le cadre de cette thèse, nous abordons l'unification de la modélisation, la conception d'observateurs et les aspects de contrôle dans le contexte des machines à courant alternatif. Pendant des décennies, les modèles CA ont été étudiés séparément dans la littérature. Cependant, grâce aux similitudes entre les machines électriques, un cadre de modélisation unifié est proposé. Le modèle unifié repose sur des paramètres équivalents du stator facilement identifiables, quel que soit le type de machine. Sur la base du modèle unifié, une contribution clé a été apportée dans cette étude, à savoir la conception de trois nouveaux observateurs de flux unifiés pour suivre les positions du flux du rotor ou du stator, quel que soit le type de moteur. Grâce à l'observateur de flux unifié, une loi de commande vectorielle unifiée pour les machines à courant alternatif devient possible. Les données expérimentales vérifient la loi de commande proposée pour les machines à induction et les machines synchrones à aimant permanent. Théoriquement, la solution proposée met en évidence le potentiel d'une «universel drive » qui n'a besoin d'aucune information sur le type de moteur. Cependant, la loi de commande unifiée donne de mauvais résultats à faible vitesse, alors qu'une méthode de démarrage unifiée est nécessaire
The control laws of AC machines, asynchronous and synchronous, are pretty mature today. Vector control is a general framework for AC machines' modeling, analysis, and control. A model-based synthesis approach is often used, and the control law parameters are defined according to the machine parameters. A standard variable speed drive is used in most industrial applications to control the speed of the motor powered by the electrical network. In this case, the drive is called a “general-purpose drive”. Depending on the type of AC machine, a specific controller is needed. This will require the drive's manufacturers to include different control laws in their drive. Consequently, adding these laws will require a lot of memory and computing capacity. Furthermore, changing the machine type would alter the control law. This problem could lead to many issues such as higher installation costs, commissioning time, and additional tuning. For this reason, the search for a "universal drive" scheme has been going on for more than one decade.This thesis presents an in-depth study on the subject of unified control for AC machines. Our goal is to innovate a unified control law for electric machines, particularly asynchronous and synchronous machines, for use in future general-purpose variable speed drive products. As a part of this thesis, we address the unification of modeling, observer design, and control aspects in the context of AC machines. For decades, the AC models have been studied separately in the literature. However, thanks to the similarities between electric machines, a unified modeling framework is proposed. The unified model relies on easily identifiable stator equivalent parameters regardless of the specific type of machine. Based on the unified model, a key contribution was made in this study, which is the design of three novel unified flux observers to track rotor or stator flux positions, regardless of the motor type. Thanks to the unified flux observer, a unified vector control law for AC machines becomes possible. Experimental data verify the proposed control law for induction machines and permanent magnet synchronous machines. Theoretically, the proposed solution highlights the potential for a “universal AC motor drive" that doesn't need any information on the motor type. However, the unified control law performs poorly at low speeds, where a unified startup method is needed

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Babatunde, Patrick O. "Norm-based methods in observer design". Thesis, Brunel University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340841.

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Stamnes, Øyvind Nistad. "Adaptive Observer for Bottomhole Pressure During Drilling". Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8846.

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To satisfy the increasing petroleum consumption on a world wide basis there is a need to find new resources. As mature fields are drained, reservoir pressure falls, which again leads to tight pressure margins. To reduce down time due to hole stability problems (e.g. kicks) there is a demand for accurate control of the pressure profile in the well. As the pressure profile is not known and depends on unknown factors such as friction loss there is a need to estimate the pressure. In this thesis an observer that adapts to unknown factors, such as friction and density changes, and estimates the bottomhole pressure is presented. Furthermore, a parameter estimator for the bulk modulus in the annulus is developed as an extension to the observer to facilitate for future control design. Both designs are based on a third order model and provide rigid proofs of stability and convergence of the estimated pressure and parameters. The pressure estimate from the observer is shown to converge to the true pressure under reasonable conditions. For parameter estimates to converge to their true values conditions on excitation are presented. The observer and parameter estimator are tested in simulations and also on log data from a well drilled at the Grane field in the North Sea. Simulation results show that the observer performs very well during typical drilling procedures affecting choke valve opening, pump flows and drill string movements. The observer shows promising behavior when tested on log data from the Grane field.

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Ascencio, Pedro. "Adaptive observer design for parabolic partial differential equations". Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/49454.

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This thesis addresses the observer design problem, for a class of linear one-dimensional parabolic Partial Differential Equations, considering the simultaneous estimation of states and parameters from boundary measurements. The design is based on the Backstepping methodology for Partial Differential Equations and extends its central idea, the Volterra transformation, to compensate for the parameters uncertainties. The design steps seek to reject time-varying parameter uncertainties setting forth a type of differential boundary value problems (Kernel-PDE/ODEs) to accomplish its objective, the solution of which is computed at every fixed sampling time and constitutes the observer gains for states and parameters. The design does not include any pre-transformation to some canonical form and/or a finite-dimensional formulation, and performs a direct parameter estimation from the original model. The observer design problem considers two cases of parameter uncertainty, at the boundary: control gain coefficient, and in-domain: diffusivity and reactivity parameters, respectively. For a Luenberger-type observer structure, the problems associated to one and two points of measurement at the boundary are studied through the application of an intuitive modification of the Volterra-type and Fredholm-type transformations. The resulting Kernel-PDE/ODEs are addressed by means of a novel methodology based on polynomial optimization and Sum-of-Squares decomposition. This approach allows recasting these coupled differential equations as convex optimization problems readily implementable resorting to semidefinite programming, with no restrictions to the spectral characteristics of some integral operators or system's coefficients. Additionally, for polynomials Kernels, uniqueness and invertibility of the Fredholm-type transformation are proved in the space of real analytic and continuous functions. The direct and inverse Kernels are approximated as the optimal polynomial solution of a Sum-of-Squares and Moment problem with theoretically arbitrary precision. Numerical simulations illustrate the effectiveness and potentialities of the methodology proposed to manage a variety of problems with different structures and objectives.

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Melvin, James E. "AUV fault detection using model based observer residuals". Thesis, Monterey, Calif. : Naval Postgraduate School, 1998. http://bosun.nps.edu/uhtbin/hyperion-image.exe/NPS-ME-98-004.pdf.

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Thesis (M.S. in Mechanical Engineering and Mechanical Engineer) Naval Postgraduate School, June 1998.
Title from cover. Thesis advisor(s): Anthony J. Healey. "June 1998."--Cover. "NPS-ME-98-004"--Cover. Includes bibliographical references (p. 117-118). Also available online.

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Jenkins, Benjamin Michael. "Fast adaptive observers for battery management systems". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111732.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.
Cataloged from PDF version of thesis. Page 145 blank.
Includes bibliographical references (pages 139-144).
With the proliferation of batteries in transportation, mobile devices and, more recently, large scale energy storage, the demand for new efficient and safe algorithms for battery management has surged. More complex chemistry cells, such as lithium-ion batteries, with their sensitivity to mishandling, misuse and defects as is evident with recent device recalls due to fires, have historically been treated more conservatively. Maximizing performance of these cells safely requires knowledge of internal variables of interest which are not directly measurable. Therefore, accurate models which estimate these variables are needed. The focus of this thesis will be on a modified Single Particle Model (SPM), specifically its internal state estimates. Unfortunately, while the model structure is known, internal parameters which specify it are not, hence, state estimation alone is not enough. This motivates simultaneous state estimation and parameter identification of the electrochemical model. Existing solutions to this task are minimal in the literature. Hence this thesis. This thesis enumerates multiple developments in electrochemical modeling and adaptive observers in general. The first and fundamental component is a modification of the SPM with attractive features such as the encapsulation of lithium diffusion as a linear dynamical system independent of nonlinearities and decoupling of the nonlinear relationships defining the kinetic properties of lithium ion transfer and open circuit potential respectively. A second development defines a set of guidelines reducing the design parameters for adaptive observers to a single tuning parameter, enabling rapid implementation and prototyping. Third, a new variant of adaptive observer, using multiple simultaneous equivalent system representations, is derived for fast parameter convergence. A novel selection of observer design variables and augmentation of the underlying equivalent system with nonlinear basis functions constitutes a fourth development extensively validated through numerical simulation and theory. This adaptive observer combined with an independent offline algorithm to update effective electrode capacity and available lithium adapts every parameter of the modified SP model to account for aging or manufacturing differences. Validation of this observer in hardware using commercially available Panasonic 18650 cells completes the goals originally set forth for this research. The developments presented pave the way for fast, computationally efficient, advanced battery management systems with the potential to increase the effective capacity of a battery or alternatively reduce the size, and therefore cost, of batteries in various applications.
by Benjamin Michael Jenkins.
Ph. D.

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Heydari, Mahdi. "Adaptive distributed observers for a class of linear dynamical systems". Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-dissertations/227.

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The problem of distributed state estimation over a sensor network in which a set of nodes collaboratively estimates the state of continuous-time linear systems is considered. Distributed estimation strategies improve estimation and robustness of the sensors to environmental obstacles and sensor failures in a sensor network. In particular, this dissertation focuses on the benefits of weight adaptation of the interconnection gains in distributed Kalman filters, distributed unknown input observers, and distributed functional observers. To this end, an adaptation strategy is proposed with the adaptive laws derived via a Lyapunov-redesign approach. The justification for the gain adaptation stems from a desire to adapt the pairwise difference of estimates as a function of their agreement, thereby enforcing an interconnection-dependent gain. In the proposed scheme, an adaptive gain for each pairwise difference of the interconnection terms is used in order to address edge-dependent differences in the estimates. Accounting for node-specific differences, a special case of the scheme is presented where it uses a single adaptive gain in each node estimate and which uniformly penalizes all pairwise differences of estimates in the interconnection term. In the case of distributed Kalman filters, the filter gains can be designed either by standard Kalman or Luenberger observers to construct the adaptive distributed Kalman filter or adaptive distributed Luenberger observer. Stability of the schemes has been shown and it is independent of the graph topology and therefore the schemes are applicable to both directed and undirected graphs. The proposed algorithms offer a significant reduction in communication costs associated with information flow by the nodes compared to other distributed Kalman filters. Finally, numerical studies are presented to illustrate the performance and effectiveness of the proposed adaptive distributed Kalman filters, adaptive distributed unknown input observers, and adaptive distributed functional observers.

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Shriba, S. "Adaptive identifier and observer algorithms for unknown order linear systems". Thesis, Brunel University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.351772.

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Ingallina, Alessandro. "Adaptive High-Gain Observers via Discete time Identifier". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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The system's state observation is one of the most important problem in control theory, and it becomes extremely challenging when the system model is not entirely known. For linear systems the problem is solved by using Luenberger observer in a deterministic framework and by Kalman filter in a stochastic framework, while for nonlinear systems, the observation problem is still a research topic. The aim of this thesis is to give a framework, in which the adaptation problem, relative to the model unknowns, can be performed by system identification techniques. In particular, in this thesis we develop and implement adaptive observers design, that uses "universal approximator" to perform the adaptation problem. Moreover, we present simulations on the performance of the proposed observer.

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Kappus, Julia Johanna. "Nonparametric adaptive estimation for discretely observed Lévy processes". Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2012. http://dx.doi.org/10.18452/16613.

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Die vorliegende Arbeit hat nichtparametrische Schätzmethoden für diskret beobachtete Lévyprozesse zum Gegenstand. Ein Lévyprozess mit endlichen zweiten Momenten und endlicher Variation auf Kompakta wird niederfrequent beobachtet. Die Sprungdynamik wird vollständig durch das endliche signierte Maß my(dx):= x ny(dx) beschrieben. Ein lineares Funktional von my soll nichtparametrisch geschätzt werden. Im ersten Teil werden Kernschätzer konstruiert und obere Schranken für das korrespondierende Risiko bewiesen. Daraus werden Konvergenzraten unter Glattheitsannahmen an das Lévymaß hergeleitet. Für Spezialfälle werden untere Schranken bewiesen und daraus Minimax-Optimalität gefolgert. Der Schwerpunkt liegt auf dem Problem der datengetriebenen Wahl des Glättungsparameters, das im zweiten Teil untersucht wird. Da die nichtparametrische Schätzung für Lévyprozesse starke strukturelle Ähnlichkeiten mit Dichtedekonvolutionsproblemen mit unbekannter Fehlerdichte aufweist, werden beide Problemstellungen parallel diskutiert und die Methoden allgemein sowohl für Lévyprozesse als auch für Dichtedekonvolution entwickelt. Es werden Methoden der Modellwahl durch Penalisierung angewandt. Während das Prinzip der Modellwahl im üblichen Fall darauf beruht, dass die Fluktuation stochastischer Terme durch Penalisierung mit einer deterministischen Größe beschränkt werden kann, ist die Varianz im hier betrachteten Fall unbekannt und der Strafterm somit stochastisch. Das Hauptaugenmerk der Arbeit liegt darauf, Strategien zum Umgang mit dem stochastischen Strafterm zu entwickeln. Dabei ist ein modifizierter Schätzer für die charakteristische Funktion im Nenner zentral, der es erlaubt, die punktweise Kontrolle der Abweichung dieses Objects von seiner Zielgröße auf die gesamte reelle Achse zu erweitern. Für die Beweistechnik sind insbesondere Talagrand-Konzentrationsungleichungen für empirische Prozesse relevant.
This thesis deals with nonparametric estimation methods for discretely observed Lévy processes. A Lévy process X having finite variation on compact sets and finite second moments is observed at low frequency. The jump dynamics is fully described by the finite signed measure my(dx)=x ny(dx). The goal is to estimate, nonparametrically, some linear functional of my. In the first part, kernel estimators are constructed and upper bounds on the corresponding risk are provided. From this, rates of convergence are derived, under regularity assumptions on the Lévy measure. For particular cases, minimax lower bounds are proved. The rates of convergence are thus shown to be minimax optimal. The focus lies on the data driven choice of the smoothing parameter, which is being considered in the second part. Since nonparametric estimation methods for Lévy processes have strong structural similarities with with nonparametric density deconvolution with unknown error density, both fields are discussed in parallel and the concepts are developed in generality, for Lévy processes as well as for density deconvolution. The choice of the bandwidth is realized, using techniques of model selection via penalization. The principle of model selection via penalization usually relies on the fact that the fluctuation of certain stochastic quantities can be controlled by penalizing with a deterministic term. Contrarily to this, the variance is unknown in the setting investigated here and the penalty term is hence itself a stochastic quantity. It is the main concern of this thesis to develop strategies to dealing with the stochastic penalty term. The most important step in this direction will be a modified estimator of the unknown characteristic function in the denominator, which allows to make the pointwise control of this object uniform on the real line. The main technical tools involved in the arguments are concentration inequalities of Talagrand type for empirical processes.

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Livros sobre o assunto "Adaptive obsever"

Melvin, James E. AUV fault detection using model based observer residuals. Monterey, Calif: Naval Postgraduate School, 1998.

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Shriba, Samir. Adaptive identifier and observer algorithms for unknown order linear systems. Uxbridge: Brunel University, 1985.

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Diab, Ahmed A. Zaki, Abo-Hashima M. Al-Sayed, Hossam Hefnawy Abbas Mohammed e Yehia Sayed Mohammed. Development of Adaptive Speed Observers for Induction Machine System Stabilization. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2298-7.

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Wim J. van der Linden. Evaluating equating error in observed-score equating. Newtown, PA: Law School Admission Council, 2006.

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Zhu, Quanmin, Hamid Reza Karimi, Olfa Boubaker, Magdi S. Mahmoud e José Ragot. New Trends in Observer-Based Control: An Introduction to Design Approaches and Engineering Applications. Elsevier Science & Technology, 2019.

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Zhu, Quanmin, Hamid Reza Karimi, Olfa Boubaker, Magdi S. Mahmoud e Jose Ragot. New Trends in Observer-Based Control: A Practical Guide to Process and Engineering Applications. Elsevier Science & Technology Books, 2019.

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Zhu, Quanmin, Hamid Reza Karimi, Olfa Boubaker, Magdi S. Mahmoud e Jose Ragot. New Trends in Observer-Based Control: An Introduction to Design Approaches and Engineering Applications. Elsevier Science & Technology Books, 2019.

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Kindt, Sara, Liesbet Goubert, Maarten Vansteenkiste e Tine Vervoort. Chronic Pain and Interpersonal Processes. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190627898.003.0007.

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This chapter argues that one particular type of a caregiver’s behavioral response to pain cannot, in and of itself, be considered adaptive or maladaptive. It contends that to understand the complexity of the interaction between caregivers and pain sufferers, a goal or need-based framework may be useful. Self-Determination theory (SDT) is presented as a heuristic framework that identifies three basic psychological needs as essential for successful adaption. Whether behavioral responses are supportive and helpful depends upon the extent to which these responses support the need for autonomy, competence, and relatedness of the sufferer. Drawing on an affective-motivational account on interpersonal dynamics in the context of pain, the chapter highlights how observer attunement toward sufferers’ needs may depend upon the regulation of various goals for caregiving, including self-oriented versus other-oriented goals and associated emotions.

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Capítulos de livros sobre o assunto "Adaptive obsever"

Costa, Ramon, Petar Kokotović e Iven Mareels. "Making a Nonlinear Observer Adaptive". In Model Identification and Adaptive Control, 95–103. London: Springer London, 2001. http://dx.doi.org/10.1007/978-1-4471-0711-8_5.

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Giron-Sierra, Jose Maria. "Adaptive Filters and Observers". In Digital Signal Processing with Matlab Examples, Volume 2, 471–580. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2537-2_5.

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Krstic, Miroslav. "Predictor Observers". In Delay Compensation for Nonlinear, Adaptive, and PDE Systems, 41–52. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4877-0_3.

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Lavretsky, Eugene, e Kevin A. Wise. "Output Feedback Control and State Observers". In Robust and Adaptive Control, 271–355. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-38314-4_6.

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Zhang, Ke, Bin Jiang, Peng Shi e Vincent Cocquempot. "Adaptive Technique-Based Distributed Fault Estimation for MAS". In Observer-Based Fault Estimation Techniques, 143–56. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67492-6_8.

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Lendek, Zsófia, Thierry Marie Guerra, Robert Babuška e Bart De Schutter. "Adaptive Observers for TS Systems". In Stability Analysis and Nonlinear Observer Design Using Takagi-Sugeno Fuzzy Models, 149–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-16776-8_7.

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Lavretsky, Eugene, e Kevin A. Wise. "Output Feedback Servomechanism with Observer-Based Loop Transfer Recovery and Adaptive Augmentation". In Robust and Adaptive Control, 581–637. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-38314-4_14.

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Zhao, Dongya, Sarah K. Spurgeon e Xinggang Yan. "An Adaptive Finite Time Sliding Mode Observer". In New Perspectives and Applications of Modern Control Theory, 523–38. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62464-8_19.

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Xia, Qing Hua, Ser Yong Lim, Marcelo H. Ang e Tao Ming Lim. "Adaptive Friction Compensation Using a Velocity Observer". In Springer Tracts in Advanced Robotics, 77–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11552246_8.

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Nafz, Florian, Jan-Philipp Steghöfer, Hella Seebach e Wolfgang Reif. "Formal Modeling and Verification of Self-* Systems Based on Observer/Controller-Architectures". In Assurances for Self-Adaptive Systems, 80–111. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36249-1_4.

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Trabalhos de conferências sobre o assunto "Adaptive obsever"

Si-Yu, Chen, Zhao Qi-Jun, Zhu Zheng e Ma Yi-Yang. "Predictions of Transonic Rotor Noise by KFWH Method with A Permeable Self-Adaptive Integration Surface". In Vertical Flight Society 72nd Annual Forum & Technology Display, 1–9. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11351.

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In this paper, a new permeable self-adaptive integration surface is developed for the evaluation of transonic rotor noise by KFWH method. Firstly, the nonlinear near flowfield solution is computed by a N-S solver and as input for acoustic calculations by KFWH formula. Then, the acoustic pressure predictions of the UH-1 model rotor with cylinder-shaped integration surfaces at different locations are shown, which reveals that the results calculated by KFWH method show a large sensitivity to the location of integration surface. In order to avoid the uncertainties in determining the cylinder-shaped integration surface, a new permeable self-adaptive integration surface is determined by pressure gradient or density adaptively according to some principles. Then, the acoustic pressure of UH-1 model rotor at different tip Mach numbers and different observer locations are simulated. In comparison with cylinder-shaped integration surface, the self-adaptive integration surface, whether it is determined by pressure gradient or by density, can both reach higher accuracy in the prediction of transonic rotor noise. Moreover, the numerical results with self-adaptive integration surfaces given by density perturbation value confirm to the experimental data better.

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Si-Yu, Chen, Zhao Qi-Jun, Zhu Zheng e Ma Yi-Yang. "A Permeable Self-adaptive Integration Surface for HSI Noise Prediction of Helicopter Rotor in Forward Flight". In Vertical Flight Society 73rd Annual Forum & Technology Display, 1–9. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12285.

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In this paper, a new permeable self-adaptive integration surface is developed for the prediction of rotor HSI noise by KFWH method in forward flight. Firstly, the nonlinear near flowfield solution is computed by a N-S solver and as input for acoustic calculations by KFWH formula. Then, the acoustic pressure predictions of the AH-1 model rotor with cylinder-shaped integration surfaces at different locations are shown, which reveals that the results calculated by KFWH method show a large sensitivity to the location of integration surface. In order to avoid the calculation error caused by the uncertainties in determining the cylinder-shaped integration surface, a new permeable self-adaptive integration surface is determined by density adaptively according to some principles. These principles have been validated in hover flight in previous paper. Then, the acoustic pressure of AH-1 model rotor at different tip Mach numbers and different observer locations are simulated. In comparison with cylinder-shaped integration surface, the self-adaptive integration surface, which is determined by density, can reach higher accuracy in the prediction of rotor HSI noise.

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Cao, Yuxi, e Jinzhi Wang. "Completely Distributed Adaptive Observer for Unknown Linear System". In 2024 43rd Chinese Control Conference (CCC), 5578–83. IEEE, 2024. http://dx.doi.org/10.23919/ccc63176.2024.10662273.

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Kim, Hyeon-Sik, Seung-Ki Sul, Hyunjae Yoo e Jaeyoon Oh. "Distortion-Minimizing Flux Observer for IPMSM Based on Frequency-Adaptive Observers". In 2018 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2018. http://dx.doi.org/10.1109/ecce.2018.8557797.

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Chen, Weijie, Zhipeng Huang, Frank W. Samuelson e Lucas Tcheuko. "Adaptive sample size re-estimation in MRMC studies". In Image Perception, Observer Performance, and Technology Assessment, editado por Robert M. Nishikawa e Frank W. Samuelson. SPIE, 2019. http://dx.doi.org/10.1117/12.2513646.

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Lago, Miguel A., e Aldo Badano. "Adaptive Laguerre-Gauss channels for detection and search of irregularly shaped lesions". In Image Perception, Observer Performance, and Technology Assessment, editado por Yan Chen e Claudia R. Mello-Thoms. SPIE, 2023. http://dx.doi.org/10.1117/12.2655056.

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Kulagin, V. P. "Fast adaptive observer trends". In XLV ACADEMIC SPACE CONFERENCE, DEDICATED TO THE MEMORY OF ACADEMICIAN S.P. KOROLEV AND OTHER OUTSTANDING NATIONAL SCIENTISTS — PIONEERS OF SPACE EXPLORATION. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0109667.

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Ali, Mairaj, e Muwahida Liaquat. "Comparison Between Distributed Observer And Adaptive Distributed Observer". In 2018 8th International Conference on Electronics Information and Emergency Communication (ICEIEC). IEEE, 2018. http://dx.doi.org/10.1109/iceiec.2018.8473554.

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Jaufmann, Pascal, Aaron Buck, Marco Zaiser, Jörg-Uwe Pott e Oliver Sawodny. "Simulation of wavefront-based disturbance observers for large telescopes". In Adaptive Optics Systems IX, editado por Dirk Schmidt, Elise Vernet e Kathryn J. Jackson. SPIE, 2024. http://dx.doi.org/10.1117/12.3018415.

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Bogdanovic, Nebojsa, Craig K. Abbey, Yongyi Yang e Jovan G. Brankov. "Adaptive learning approach to improve generalization performance of a domain-aware CNN-based ideal model observer". In Image Perception, Observer Performance, and Technology Assessment, editado por Yan Chen e Claudia R. Mello-Thoms. SPIE, 2024. http://dx.doi.org/10.1117/12.3006257.

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Relatórios de organizações sobre o assunto "Adaptive obsever"

Demetriou, M. A., R. F. Curtain e K. Ito. Adaptive Observers for Structurally Perturbed Positive Real Delay Systems. Fort Belvoir, VA: Defense Technical Information Center, janeiro de 1998. http://dx.doi.org/10.21236/ada446727.

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McAlpin, Tate, John Petrie, Gaurav Savant, Daniel Savant, Angela Hogan e Gary Brown. Numerical modeling of supercritical flow in the Los Angeles River : part II : existing conditions Adaptive Hydraulics numerical model study. Engineer Research and Development Center (U.S.), dezembro de 2024. https://doi.org/10.21079/11681/49487.

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The Los Angeles District of the US Army Corps of Engineers is assisting the City of Los Angeles with restoration efforts on the Los Angeles River. The city wishes to restore portions of the channelized river to a more natural state with riparian green spaces for both wildlife and public recreation usage. The Los Angeles River provides an important role from a flood-control perspective, and functionality needs to be preserved when contemplating system modifications. This report details the development of an Adaptive Hydraulics numerical model capable of modeling this complex system consisting of both subcritical and supercritical flow regimes. The model geometry was developed to represent the existing conditions system for future usage in quantifying the impact associated with proposed restoration alternatives. Due to limited hydraulic data in the study area, an extensive model validation to observed data was not possible. A model was developed and simulated using the most appropriate input parameters. Given the lack of measured data for model validation, an extensive number of sensitivity simulations were completed to identify the most impactful parameters and quantify a reasonable level of confidence in the model results based on the uncertainty in the model inputs.

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McAlpin, Tate, Gaurav Savant, Gang Zhao, John Petrie e Madalyn Mouton. Numerical modeling of supercritical flow in the Los Angeles River : Part I : Adaptive Hydraulics numerical modeling of the 1943 physical model. Engineer Research and Development Center (U.S.), março de 2023. http://dx.doi.org/10.21079/11681/46631.

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The Los Angeles District of the US Army Corps of Engineers is assisting the City of Los Angeles with restoration efforts on the Los Angeles River. The city wishes to restore portions of the channelized river to a more natural state with riparian/vegetative green spaces for both wildlife and public recreation usage. The Los Angeles River provides an important role for the City of Los Angeles from a flood-control perspective, and functionality needs to be preserved when contemplating system modifications. This report details the development of an Adaptive Hydraulics (AdH) numerical model capable of representing this complex system consisting of both subcritical and supercritical flow regimes. Due to limited hydraulic data in the study area, an extensive model validation to observed data was not possible. To bridge the data gap, a numerical model was developed from a previously completed physical model study with extensive quantitative measurements and qualitative reports of hydraulic conditions. This approach allowed engineers to evaluate the effectiveness of the AdH model in representing this complex hydraulic system along with determining the best methodology to accurately represent the existing conditions. This study determined appropriate model parameters that will be utilized in further numerical modeling efforts to evaluate system modifications associated with restoration efforts.

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Hall, David, e Sam Lindsay. Scaling Climate Finance: Forest Finance Instruments. Auckland University of Technology, fevereiro de 2020. http://dx.doi.org/10.24135/10292/17992.

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The Lab’s inaugural concept paper, Scaling Climate Finance: Forest Finance Instruments, proposes seven innovative instruments, each ranked in respect to impact strategy and additionality. The paper analyses an environmental impact bond, a leveraged carbon fund, a green covered bond, an equity fund designed to upscale continuous cover forestry, risk-adjusted loans, and an exchange for investing in Nature-Based Solutions. Each concept was developed by reviewing international innovations, adapting promising structures to the unique local context of Aotearoa New Zealand, and conducting workshops and reviews with sector experts and government observers to test, refine and validate the structure. The paper also identifies relevant indicators for impact assessment, such as IRIS metrics, and potential regulatory changes to support the delivery of more sustainable forest outcomes.

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Wijaya, Ignasius P. A., Eric Kreiger e Asuf Masud. An elastic-inelastic model and embedded bounce-back control for layered printing with cementitious materials. Engineer Research and Development Center (U.S.), janeiro de 2024. http://dx.doi.org/10.21079/11681/48091.

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This paper presents a finite-deformation model for extrusion-based layered printing with cementitious materials. The evolution of mechanical properties as the printed material cures and stiffens results in nonphysical reduction in the magnitude of elastic strains when standard constitutive models are employed. This elastic recovery of the printing induced deformation contradicts the experimentally observed behavior of the printed cementitious materials that harden at a nearly-frozen deformed state. A thermodynamically motivated constraint on the evolution of elastic strains is imposed on the constitutive model to remedy the nonphysical bounce-back effect. An algorithm that is based on a strain-projection technique for the elastic part of deformation is developed that complements the inelastic response given by the Drucker–Prager model. It is then embedded in a finite strain finite element framework for the modeling and simulation of cure hardening and inelastic response of the early age cementitious materials. A ghost mesh method is proposed for continuous layer-wise printing of the material without the need for intermittent mesh generation technique or adaptive remeshing methods. The model is validated via comparison with experimental data and representative test cases are presented that investigate the mathematical and computational attributes of the proposed model.

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Oliver, Amanda, Catherine Murphy, Edmund Howe e John Vest. Comparing methods for estimating water surface elevation between gages in the Lower Mississippi River. Engineer Research and Development Center (U.S.), abril de 2023. http://dx.doi.org/10.21079/11681/46915.

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Predicting a water surface elevation (WSElev) at a particular location has a wide range of applications like determining if a levee will overtop or how much a dike notch will increase water flow into a secondary channel. Five existing methods for predicting the water’s surface, (1) daily slope, (2) average slope, (3) River Analysis System (RAS) 1D, (4) RAS 2D, and (5) Adaptive Hydraulics modeling system (AdH), were used to predict the Mississippi River’s daily water surface from 10 October 2014 to 31 May 2016 at Friar’s Point, Greenville, and Natchez gages. The error, calculated as the model-predicted water surface minus the gage-observed water surface, was compared among the methods. The average slope method, using Helena and Fair Landing gages, and the daily slope method, using either Memphis and Helena or Helena and Arkansas City gages, most closely estimated the observed WSElev. The RAS 1D predictions for Friar Point and Greenville produced more accurate estimates than the RAS 2D model and were the only estimates that did not show a pattern of over- or underestimation. When the daily slope method was applied to gages that were farther apart (Memphis and Arkansas City, Arkansas City and Vicksburg, or Vicksburg and Knoxville), the error became greater than most RAS 1D and 2D predictions. The low error and simple calculations of the daily slope and average slope methods using gages <110 river miles apart make these methods useful for calculating current and historic conditions. The lack of over- or underestimation in the RAS 1D predictions (for locations away from the edges of the model area) make this method a better choice for predicting average WSElevs and a good choice for forecasting future WSElevs.

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Schuurman, Gregor, James Lawler, Joel Reynolds, Leigh Welling, James Lawler, Joel Reynolds, Gregor Schuurman e Leigh Welling. Climate change adaptation practices and possibilities considered by the National Park Service Alaska Leadership Council in 2019: Summary of an ALC exercise (technical assistance request 10860). National Park Service, 2024. http://dx.doi.org/10.36967/2306300.

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Profound climate change-driven environmental changes observed in Alaska prompted the National Park Service?s Alaska Leadership Council (ALC) to dedicate a half-day of their September 2019 meeting to understanding and addressing key climate change vulnerabilities. The session aimed to introduce participants to the Resist-Accept-Direct (RAD) framework?an emerging framing tool for exploring the ?universe? of potential adaptation actions?and to initiate broader discussion regarding current and potential future adaptation actions in each of Alaska?s national parks. Participating superintendents were asked to both identify ongoing actions in their parks in response to climate change and brainstorm potential future actions. This report summarizes and analyzes their responses. To gauge the extent to which participants were exploring the full adaptation decision space and to better understand how to apply the RAD framework, actions were further classified as reflecting one of the three RAD categories: resistance, acceptance, or directing of change. Roughly half of all submissions were adaptation actions. Of these adaptation actions, nearly a third were subsistence-related, reflecting the importance of subsistence in the Alaska region. Most adaptation actions were focused on resisting climate change impacts on resources, assets, and people. The exercise clarified the need to understand what constitutes an adaptation action. For example, a decision to support or conduct a research project is different than a decision to use that research to take adaptive action. More importantly, the exercise showed that evaluating the degree to which participants explored the full adaptation decision space?i.e., by classifying each action under the RAD framework?requires that the motivating intention or goal of the action be clearly articulated. For example, ?plant(ing) vegetation after disturbance? can be a resistance or a directing-change action depending on whether the motivation is to (a) plant historically occurring species in historically occurring proportions to restore pre-disturbance conditions or to (b) favor species adapted to emerging and projected conditions. This important lesson in RAD framework application underscores the need to request a higher degree of specificity about the motivations behind potential actions in adaptation planning processes. This report documents the ALC?s thinking on climate change adaptation at one point (snapshot) in time. It shows that many of the adaptation actions identified by participants focused on resisting climate change impacts, empowers assessment of the evolution of adaptation action by the NPS ALC, helps to clarify how best to use the RAD framework, and, ideally, prompts further discussion and adaptation action in Alaska.

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DeSantis, John, e Jeffery Roesler. Longitudinal Cracking Investigation on I-72 Experimental Unbonded Concrete Overlay. Illinois Center for Transportation, fevereiro de 2022. http://dx.doi.org/10.36501/0197-9191/22-002.

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A research study investigated longitudinal cracking developing along an experimental unbonded concrete overlay (UBOL) on I-72 near Riverton, Illinois. The project evaluated existing literature on UBOL (design, construction, and performance), UBOL case studies, and mechanistic-empirical design procedures for defining the mechanisms that are contributing to the observed distresses. Detailed distress surveys and coring were conducted to assess the extent of the longitudinal cracking and faulting along the longitudinal lane-shoulder joint. Coring over the transverse contraction joints in the driving lane showed stripping and erosion of the dense-graded hot-mix asphalt (HMA) interlayer was the primary mechanism initiating the longitudinal cracks. Cores from the lane-shoulder joint confirmed stripping and erosion was also occurring there and leading to the elevation difference between the driving lane and shoulder. Field sections by surrounding state departments of transportation (DOTs), such as Iowa, Michigan, Minnesota, Missouri, and Pennsylvania, with similar UBOL design features to the I-72 section were examined. Site visits were performed in Illinois, Michigan, Minnesota, and Pennsylvania, while other sections were reviewed via state DOT contacts as well as Google Earth and Maps. Evidence from other DOTs suggested that HMA interlayers, whether dense graded or drainable, could experience stripping, erosion, and instability under certain conditions. An existing performance test for interlayers, i.e., Hamburg wheel-tracking device, and current models reviewed were not able to predict the distresses on I-72 eastbound. Adapting a dynamic cylinder test is a next step to screen HMA interlayers (or other stabilized layers) for stripping and erosion potential. To slow down the cracking and faulting on I-72 eastbound, sealing of the longitudinal lane-shoulder joint and driving lane transverse joints is suggested. To maximize UBOL service life, an HMA overlay will minimize water infiltration into the interlayer system and significantly slow down the HMA stripping and erosion mechanism that has led to longitudinal cracking and lane-shoulder faulting.

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Elbaum, Michael, e Peter J. Christie. Type IV Secretion System of Agrobacterium tumefaciens: Components and Structures. United States Department of Agriculture, março de 2013. http://dx.doi.org/10.32747/2013.7699848.bard.

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Objectives: The overall goal of the project was to build an ultrastructural model of the Agrobacterium tumefaciens type IV secretion system (T4SS) based on electron microscopy, genetics, and immunolocalization of its components. There were four original aims: Aim 1: Define the contributions of contact-dependent and -independent plant signals to formation of novel morphological changes at the A. tumefaciens polar membrane. Aim 2: Genetic basis for morphological changes at the A. tumefaciens polar membrane. Aim 3: Immuno-localization of VirB proteins Aim 4: Structural definition of the substrate translocation route. There were no major revisions to the aims, and the work focused on the above questions. Background: Agrobacterium presents a unique example of inter-kingdom gene transfer. The process involves cell to cell transfer of both protein and DNA substrates via a contact-dependent mechanism akin to bacterial conjugation. Transfer is mediated by a T4SS. Intensive study of the Agrobacterium T4SS has made it an archetypal model for the genetics and biochemistry. The channel is assembled from eleven protein components encoded on the B operon in the virulence region of the tumor-inducing plasmid, plus an additional coupling protein, VirD4. During the course of our project two structural studies were published presenting X-ray crystallography and three-dimensional reconstruction from electron microscopy of a core complex of the channel assembled in vitro from homologous proteins of E. coli, representing VirB7, VirB9, and VirB10. Another study was published claiming that the secretion channels in Agrobacterium appear on helical arrays around the membrane perimeter and along the entire length of the bacterium. Helical arrangements in bacterial membranes have since fallen from favor however, and that finding was partially retracted in a second publication. Overall, the localization of the T4SS within the bacterial membranes remains enigmatic in the literature, and we believe that our results from this project make a significant advance. Summary of achievements : We found that polar inflations and other membrane disturbances relate to the activation conditions rather than to virulence protein expression. Activation requires low pH and nutrient-poor medium. These stress conditions are also reflected in DNA condensation to varying degrees. Nonetheless, they must be considered in modeling the T4SS as they represent the relevant conditions for its expression and activity. We identified the T4SS core component VirB7 at native expression levels using state of the art super-resolution light microscopy. This marker of the secretion system was found almost exclusively at the cell poles, and typically one pole. Immuno-electron microscopy identified the protein at the inner membrane, rather than at bridges across the inner and outer membranes. This suggests a rare or transient assembly of the secretion-competent channel, or alternatively a two-step secretion involving an intermediate step in the periplasmic space. We followed the expression of the major secreted effector, VirE2. This is a single-stranded DNA binding protein that forms a capsid around the transferred oligonucleotide, adapting the bacterial conjugation to the eukaryotic host. We found that over-expressed VirE2 forms filamentous complexes in the bacterial cytoplasm that could be observed both by conventional fluorescence microscopy and by correlative electron cryo-tomography. Using a non-retentive mutant we observed secretion of VirE2 from bacterial poles. We labeled the secreted substrates in vivo in order detect their secretion and appearance in the plant cells. However the low transfer efficiency and significant background signal have so far hampered this approach.

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Strasser, Fiona-Elaine. Recommendations on engaging with the next generation of stakeholders. EuroSea, 2023. http://dx.doi.org/10.3289/eurosea_d8.11.

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This report provides an overview of EuroSea's initiatives focused on engaging the next generation of ocean observing and forecasting stakeholders. Many activities took place, including delivering workshops, presenting the EuroSea itinerant exhibition, collaborating with the WASCAL Floating University and the SEA-EU inter-university initiative, supporting the international Ocean Observers Initiative, and much more. Engaging the next generation of stakeholders in meaningful discussions and innovative projects is essential to ensure future-oriented intergenerational collaboration. Yet, this is often an overlooked aspect of public engagement within the Horizon 2020 landscape as it requires engagement techniques specifically tailored to reach the young generation. Within the framework of Horizon 2020, the European Union's research and innovation funding program, public engagement traditionally targets a diverse range of stakeholders, including researchers, policymakers, industry representatives, civil society organizations, NGOs, and citizens. While these efforts are crucial for fostering inclusive and transparent dialogue, targeted initiatives directed towards the younger generation and early-career ocean professionals need to be expanded. It is important to recognize the concerns, unique perspectives, and aspirations of young individuals who will inherit the outcomes of today's research and innovation. Dedicating resources to engage with the next generation is vital to ensure their active involvement in shaping their future and addressing global challenges such as the sustainability of ocean observing, monitoring, and forecasting. EuroSea has recognized the importance of fostering a deeper understanding of ocean observing and forecasting among the younger generation. This deliverable and the many activities feeding into it are a testament to EuroSea's commitment to this cause. This report focuses on the lessons learnt from a diverse array of activities engaging the next generation of ocean observing and forecasting stakeholders, demonstrating the extensive range of possibilities for involving the younger generation. It underscores the importance of tailoring approaches to different age groups, from school children to university graduates and adapting engagement strategies to their varying interests and life stages. Every experience—even the ones that did not turn out as expected—has shown to be beneficial, and it is important to share lessons learnt and identify best practices while expanding these kinds of initiatives. EuroSea's dedication to engaging the next generation of stakeholders is a significant step in fostering inter-generational dialogue and promoting blue skills and knowledge sharing. Valuable lessons have been learnt from the EuroSea engagement activities and provide guidance for future initiatives aimed at fostering a deeper understanding of our ocean among the younger generation and engaging them in conversations that impact their future on this planet. (EuroSea Deliverable, D8.11)

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