Zeitschriftenartikel: „Commande robuste“

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Bachta, Wael, Edouard Laroche, Pierre Renaud und Jacques Gangloff. „Commande robuste d’un stabilisateur cardiaque actif“. Journal Européen des Systèmes Automatisés 46, Nr. 4-5 (30.07.2012): 559–75. http://dx.doi.org/10.3166/jesa.46.559-575.

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2

Arzelier, D., J. Bernussou, D. Henrion und D. Peaucelle. „Optimisation et théorie de la commande robuste“. J3eA 2 (2003): 004. http://dx.doi.org/10.1051/bib-j3ea:2003504.

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3

Grossard, Mathieu, Nicolas Chaillet, Medhi Boukallel, Christine Rotinat-Libersa und Arnaud Hubert. „Synthèse et commande robuste d'une micropince piézoélectrique intégrée“. Journal Européen des Systèmes Automatisés 44, Nr. 6 (30.07.2010): 661–88. http://dx.doi.org/10.3166/jesa.44.661-688.

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4

Litrico, Xavier. „Modélisation et commande robuste de systèmes barrage-rivière“. La Houille Blanche, Nr. 3-4 (Juni 2001): 86–90. http://dx.doi.org/10.1051/lhb/2001043.

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5

Jerbi, Nabil, Simon Colart Dutilleul, Etienne Craye und Mohamed Benrejeb. „Commande robuste des ateliers manufacturiers à contraintes de temps“. Journal Européen des Systèmes Automatisés 43, Nr. 1-2 (28.02.2009): 7–33. http://dx.doi.org/10.3166/jesa.43.7-33.

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6

Boukhnifer, Moussa. „Commande robuste d'une machine asynchrone alimentée par un onduleur multiniveau“. Revue internationale de génie électrique 10, Nr. 6 (01.12.2007): 717–49. http://dx.doi.org/10.3166/rige.10.717-749.

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7

Robyns, B., F. Labrique und H. Buyse. „Commande numérique simplifiée et robuste d'actionneurs asynchrones de faible puissance“. Journal de Physique III 6, Nr. 8 (August 1996): 1039–57. http://dx.doi.org/10.1051/jp3:1996169.

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8

Labit, Yann. „Commande robuste séquencée pour la synthèse de systèmes non linéaires“. Journal Européen des Systèmes Automatisés 37, Nr. 7-8 (30.10.2003): 999–1023. http://dx.doi.org/10.3166/jesa.37.999-1023.

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9

Djeriri, Youcef, und Zinelaabidine Boudjema. „Commande robuste par la logique floue et les réseaux de neurones artificiels de la GADA : étude comparative“. Journal of Renewable Energies 20, Nr. 1 (12.10.2023): 147–60. http://dx.doi.org/10.54966/jreen.v20i1.616.

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Cet article présente la commande de la machine asynchrone à double alimentation en mode génératrice (GADA) par des techniques de l'Intelligence Artificielle (IA), utilisée dans un système de conversion d'énergie éolienne à vitesse variable. Donc dans ce travail, on s’intéresse particulièrement à l’application de la commande vectorielle indirecte par orientation du flux statorique à la GADA, basée sur les régulateurs de l'intelligence artificielle, tels que la logique floue et les réseaux de neurones. Ces derniers surpassent les limites des techniques classiques et possèdent des caractéristiques essentielles pour l'amélioration de la robustesse de la commande vectorielle. Des résultats de simulation sous Matlab/Simulink sontdonnés afin de comparer les performances des deux régulateurs dans le contrôle de la GADA.

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Marangé, Pascale, Serge Debernard, François Gellot, Marie-Pierre Pacaux-Lemoine, Alexandre Philippot, Thierry Poulain, Bernard Riera und Jean-François Pétin. „Approche de détection et d’explication d’erreur de commande par filtrage robuste“. Journal Européen des Systèmes Automatisés 48, Nr. 4-6 (30.10.2014): 339–72. http://dx.doi.org/10.3166/jesa.48.339-372.

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Le, Vu Tuan Hieu, Cristina Stoica, Didier Eumur und Eduardo Fernández Camacho. „Commande prédictive robuste par des techniques d’observateurs basées sur des ensembles zonotopiques“. Journal Européen des Systèmes Automatisés 46, Nr. 2-3 (30.04.2012): 235–50. http://dx.doi.org/10.3166/jesa.46.235-250.

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12

Massaoui, Charifa, Rosa Abbou und Jean Jacques Loiseau. „étude et commande robuste de systèmes logistiques soumis à une demande inconnue bornée“. Journal Européen des Systèmes Automatisés 49, Nr. 6 (28.12.2016): 703–23. http://dx.doi.org/10.3166/jesa.49.703-723.

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de Sousa Chaves, Fabio, Mohamed Abbas Turki, Hisham Abou-Kandil und João Marcos Travasso Romano. „Commande optimale et robuste pour l’allocation opportuniste de la puissance d’un réseau de télécommunication sans ﬁl“. Journal Européen des Systèmes Automatisés 46, Nr. 4-5 (30.07.2012): 421–51. http://dx.doi.org/10.3166/jesa.46.421-451.

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14

Zoo Eyindanga, René Casimir. „Citoyenneté et éducation à la citoyenneté : points de vue d’enseignants et d’enseignantes du secondaire au Gabon“. Articles 48, Nr. 1 (19.09.2013): 203–22. http://dx.doi.org/10.7202/1018409ar.

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Le présent article vise à dégager les significations que des enseignants et enseignantes de quelques écoles secondaires du Gabon attribuent à la citoyenneté et à l’éducation à la citoyenneté sur la base d’un sondage effectué auprès d’une soixantaine d’entre eux, dont plusieurs enseignent l’éducation civique. Le contexte de la démocratie est évoqué, sur fond d’exigences sociales nouvelles, contexte qui commande un regard renouvelé sur l’éducation civique dispensée à l’école. Les points de vue exprimés, qui font écho à l’expérience personnelle et professionnelle des pédagogues concernés, rendent compte d’une conception quelque peu normative de la citoyenneté bien qu’ouverte sur la participation, mais aussi de l’obligation qu’a l’école d’assurer une éducation civique plus robuste malgré les obstacles sociaux et scolaires rencontrés.

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Pezol, Nor Syafiqah, Mohd Hezri Fazalul Rahiman, Ramli Adnan und Mazidah Tajjuddin. „Temperature Control of Essential Oil Extraction Process Using Second Generation of Commande Robuste d’Ordre Non Entier (CRONE-2)“. Journal of Electrical & Electronic Systems Research 19, OCT2021 (01.10.2021): 178–84. http://dx.doi.org/10.24191/jeesr.v19i1.024.

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16

Velmurugan, V., M. Venkatesan und N. N. Praboo. „Analysis and Performance Validation of CRONE Controllers for Speed Control of a DC Motor“. International Journal of Robotics and Control Systems 4, Nr. 2 (06.05.2024): 558–80. http://dx.doi.org/10.31763/ijrcs.v4i2.1343.

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In recent decades controllers play a major role for an efficient control and reliable operation of an industrial process. Hence in this paper, a special kind of Commande Robuste d’Ordre Non Entier (CRONE) controller is designed for controlling the speed of DC Motor (DCM). The proper design procedure of two generations CRONE control strategies named as First-Generation CRONE (FGC) and Second-Generation CRONE (SGC) controllers are implemented through the transfer function of armature-controlled DCM. Simulations are performed on MATLAB software in order to investigate the servo responses of two designed CRONE controllers, besides the results are presented in terms of settling time(ts), rise time(tr), Integral Square Error (ISE) and Integral Absolute Error (IAE). In addition, the relay PI controller is designed and the simulation results are presented for comparison purpose. It is evident from the comparing results that the SGC controller is superior for effective process control.

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Garcia, Germain, und Sophie Tarbouriech. „Commande robuste des systèmes linéaires incertains. Extensions pour la prise en compte de non-linéarité de type saturation ou backlash“. Journal Européen des Systèmes Automatisés 44, Nr. 6 (30.07.2010): 603–29. http://dx.doi.org/10.3166/jesa.44.603-629.

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Sung, Yoon-Gyung, und Seongjun Lee. „Robust Input Shaping Commands with First-Order Actuators“. Micromachines 15, Nr. 9 (28.08.2024): 1086. http://dx.doi.org/10.3390/mi15091086.

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This paper presents robust input shaping commands with first-order actuators utilizing a classical robust input shaper for practical applications in input shaping technology. An ideal input shaping command can deviate due to actuator dynamics so that the modified command has a detrimental effect on the performance of oscillation reduction in feedforward control applications. A zero-vibration-derivative (ZVDF) shaper with first-order actuators is analytically proposed using a phasor–vector approach, an exponential function for the approximation of the dynamic response of first-order actuators and the usage of the ZVD shaper. In addition, an equivalent transformation is utilized based on the superposition principle for the convenient inclusion of first-order actuator dynamics and is applied to the individual segment input command. The residual deflection and robustness of the proposed robust input shaping commands are numerically evaluated and compared with those of a conventional ZVD shaper with respect to the parameter uncertainties of flexible systems and actuators. The robust input shaping commands that are possible with first-order actuators are experimentally validated, presenting a better robustness and residual deflection reduction performance than the classical ZVD shaper on a mini bridge crane.

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Ramesh, Thelkar, C. Bharatiraja, Muluken Teka, Mulugeta Gonfa, Tesfabirhan Shoga, Abu Feyo und Tefera Mekonnen. „Modeling and performance analysis of FOPID controller for interacting coupled tank system“. FME Transactions 51, Nr. 3 (2023): 362–73. http://dx.doi.org/10.5937/fme2303362t.

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Process control is fundamental in modern interaction since it ensures security and improvement in a cycle. Furthermore, process control is a valuable apparatus to fulfill the ecological strategy and item quality necessities. In ventures, one of the controlling system factors is fluid level, the fluid level regulators are a critical concern and well-known interaction, and the aggregate illustrative additionally genuine world in designing techniques. Fluid-level coupled tank framework can be set up into two popular types of interfacing and non-associating structure. This work centers around associating coupled tank control frameworks, numerous issues impacting the fluid level like nonlinearity of the framework, displaying vulnerabilities, and complex investigation, so to conquer those issues, to acquire steady stable results and quick reactions different regulators are required. The liquid must be transferred and kept in a holder for control design in the modern day. The study of a partial request proportional-integralderivative (PID) regulator for controlling a fluid level of the tank framework is presented in this work. FOPID and TID controller techniques are tested and demonstrated for coupling connected tank systems using several partial request regulators, including Commande Robuste d'Ordre Non-Entire (CRONE), Tilt-Integral Derivative (TID), and Fractional order PID (FOPID). The result reaction is directed with the MATLAB®/Simulink® circumstance to check the exhibition of the framework. The reproduction results showed that by controlling connecting coupled tank system (CTS) without aggravation, the reaction is great, however remembering outside unsettling influence for the subsequent tank, the regulator shows a feeble reaction aside from the FOPID regulator. The explanation is FOPID regulator has at least two changed boundaries that expand the vigor of the framework. From the regulators tried in this work, the partial request relative basic subordinate regulator (FOPID) has great execution contrasted with PID, TID, and digital-PID regulators. The accomplished presentation particularly of the FOPID regulator is a better performance for CTS compared to the other listed controllers.

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Nagy, Gabriella. „Construction of Anytime Algorithms for Robust Speech Recognition“. Advanced Materials Research 1117 (Juli 2015): 265–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1117.265.

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Reliability of voice-controlled Ambient Assisted Living (AAL) systems depends mostly on real-time recognition of speech commands coming from a noisy environment. This paper discusses the aspects of constructing anytime algorithms for robust speech recognition in AAL systems. In this case, command recognition is a speaker-dependent classification on a limited set of isolated phrases. An interruptible search can rule out every command that is not a possible solution according to various parameters of speech, and can identify a spoken command with a sufficiently high probability, while keeping time constraints in mind.

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Gu, Ariel, und Hong Il Yoo. „vcemway: A one-stop solution for robust inference with multiway clustering“. Stata Journal: Promoting communications on statistics and Stata 19, Nr. 4 (Dezember 2019): 900–912. http://dx.doi.org/10.1177/1536867x19893637.

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Most Stata commands allow cluster( varname) or vce(cluster clustvar) as an option, popularizing the use of standard errors that are robust to oneway clustering. For adjusting standard errors for multiway clustering, there is no solution that is as widely applicable. While several community-contributed packages support multiway clustering, each package is compatible only with a subset of models that Stata’s ever-expanding library of commands allows the researcher to fit. We introduce a command, vcemway, that provides a one-stop solution for multiway clustering. vcemway works with any estimation command that allows cluster( varname) as an option, and it adjusts standard errors, individual significance statistics, and confidence intervals in output tables for multiway clustering in specified dimensions. The covariance matrix used in making this adjustment is stored in e(V), meaning that any subsequent call to postestimation commands that use e(V) as input (for example, test and margins) will also produce results that are robust to multiway clustering.

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Cattaneo, Matias D., Rocío Titiunik und Gonzalo Vazquez-Bare. „Analysis of regression-discontinuity designs with multiple cutoffs or multiple scores“. Stata Journal: Promoting communications on statistics and Stata 20, Nr. 4 (Dezember 2020): 866–91. http://dx.doi.org/10.1177/1536867x20976320.

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In this article, we introduce the Stata (and R) package rdmulti, which consists of three commands (rdmc, rdmcplot, rdms) for analyzing regression-discontinuity (RD) designs with multiple cutoffs or multiple scores. The command rdmc applies to noncumulative and cumulative multicutoff RD settings. It calculates pooled and cutoff-specific RD treatment effects and provides robust biascorrected inference procedures. Postestimation and inference is allowed. The command rdmcplot offers RD plots for multicutoff settings. Finally, the command rdms concerns multiscore settings, covering in particular cumulative cutoffs and two running variable contexts. It also calculates pooled and cutoff-specific RD treatment effects, provides robust bias-corrected inference procedures, and allows for postestimation and inference. These commands use the Stata (and R) package rdrobust for plotting, estimation, and inference. Companion R functions with the same syntax and capabilities are provided.

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Ye, Xiaoqing, und Yixiao Sun. „Heteroskedasticity- and Autocorrelation-robust F and t Tests in Stata“. Stata Journal: Promoting communications on statistics and Stata 18, Nr. 4 (Dezember 2018): 951–80. http://dx.doi.org/10.1177/1536867x1801800412.

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In this article, we consider time-series, ordinary least-squares, and instrumental-variable regressions and introduce a new pair of commands, har and hart, that implement more accurate heteroskedasticity- and autocorrelation-robust (HAR) F and t tests. These tests represent part of the recent progress on HAR inference. The F and t tests are based on the convenient F and t approximations and are more accurate than the conventional chi-squared and normal approximations. The underlying smoothing parameters are selected to target the type I and type II errors, which are the two fundamental objects in every hypothesis testing problem. The estimation command har and the postestimation test command hart allow for both kernel HAR variance estimators and orthonormal-series HAR variance estimators. In addition, we introduce another pair of new commands, gmmhar and gmmhart, that implement the recently developed F and t tests in a two-step generalized method of moments framework. For these commands, we opt for the orthonormal-series HAR variance estimator based on the Fourier bases because it allows us to develop convenient F and t approximations as in the first-step generalized method of moments framework. Finally, we present several examples to demonstrate these commands.

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Sasaki, Yuya, und Takuya Ura. „Average treatment effect estimates robust to the “limited overlap” problem: robustate“. Stata Journal: Promoting communications on statistics and Stata 22, Nr. 2 (Juni 2022): 344–54. http://dx.doi.org/10.1177/1536867x221106402.

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We introduce a new command, robustate, that executes the inverseprobability weighting estimation and inference for the average treatment effect with robustness against limited overlap (that is, weak satisfaction of the common support condition). This command produces estimates, standard errors, p-values, and confidence intervals for the average treatment effect. The utility of the command is demonstrated with both simulated and real data of right heart catheterization. These illustrations show that the proposed estimator implemented by the robustate command indeed exhibits more robustness against limited overlap than the traditional inverse-probability weighting estimator. The main method of the command is proposed in Sasaki and Ura (2022, Econometric Theory 38: 66–112).

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Mima, Hideki, Kazuaki Ando und Jun-Ichi Aoe. „A robust method for understanding NL interface commands in the ICI Intelligent Command Interpreter“. Information Sciences 85, Nr. 1-3 (Juli 1995): 185–98. http://dx.doi.org/10.1016/0020-0255(95)00024-j.

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CHANG, MING-SHAUNG, und JUNG-HUA CHOU. „A ROBUST AND FRIENDLY HUMAN–ROBOT INTERFACE SYSTEM BASED ON NATURAL HUMAN GESTURES“. International Journal of Pattern Recognition and Artificial Intelligence 24, Nr. 06 (September 2010): 847–66. http://dx.doi.org/10.1142/s0218001410008214.

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In this paper, we design a robust and friendly human–robot interface (HRI) system for our intelligent mobile robot based only on natural human gestures. It consists of a triple-face detection method and a fuzzy logic controller (FLC)-Kalman filter tracking system to check the users and predict their current position in a dynamic and cluttered working environment. In addition, through the combined classifier of the principal component analysis (PCA) and back-propagation artificial neural network (BPANN), single and successive commands defined by facial positions and hand gestures are identified for real-time command recognition after dynamic programming (DP). Therefore, the users can instruct this HRI system to make member recognition or expression recognition corresponding to their gesture commands, respectively based on the linear discriminant analysis (LDA) and BPANN. The experimental results prove that the proposed HRI system perform accurately in real-time face detection and tracking, and robustly react to the corresponding gesture commands at eight frames per second (fps).

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Montaño, Andrés, und Raúl Suárez. „Robust dexterous telemanipulation following object-orientation commands“. Industrial Robot: An International Journal 44, Nr. 5 (21.08.2017): 648–57. http://dx.doi.org/10.1108/ir-12-2015-0226.

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Purpose This paper aims to present a procedure to change the orientation of a grasped object using dexterous manipulation. The manipulation is controlled by teleoperation in a very simple way, with the commands introduced by an operator using a keyboard. Design/methodology/approach The paper shows a teleoperation scheme, hand kinematics and a manipulation strategy to manipulate different objects using the Schunk Dexterous Hand (SDH2). A state machine is used to model the teleoperation actions and the system states. A virtual link is used to include the contact point on the hand kinematics of the SDH2. Findings Experiments were conducted to evaluate the proposed approach with different objects, varying the initial grasp configuration and the sequence of actions commanded by the operator. Originality/value The proposed approach uses a shared telemanipulation schema to perform dexterous manipulation; in this schema, the operator sends high-level commands and a local system uses this information, jointly with tactile measurements and the current status of the system, to generate proper setpoints for the low-level control of the fingers, which may be a commercial close one. The main contribution of this work is the mentioned local system, simple enough for practical applications and robust enough to avoid object falls.

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Ahmed, Yarba, Aichetoune Oumar und Mohamed Cherkaoui. „Nonlinear robust control applied to the six-phase induction machine“. International Journal of Power Electronics and Drive Systems (IJPEDS) 15, Nr. 4 (01.12.2024): 2089. http://dx.doi.org/10.11591/ijpeds.v15.i4.pp2089-2096.

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This paper proposes a nonlinear robust control for the six-phase induction machine (SPIM). It is based on the super twisting sliding mode (STSM) to ensure good decoupling and robust performance. This paper proposes also a comparative study between STSM and active disturbance rejection control (ADRC). We apply the rotor field-oriented control to ensure the decoupling between the magnitudes of the SPIM. Then we study the STSM control to regulate the rotor speed, the stator currents, and the rotor flux of the machine. The STSM ensures the same performance as the classical sliding mode control with the advantage of reducing the phenomenon of chattering. At the same time, the STSM command is compared to the ADRC command. The ADRC is one of the robust commands that makes it possible to estimate and eliminate internal or external disturbances. To test the robustness of the STSM and the ADRC, we implanted them in Simulink/MATLAB and the simulation results show the effectiveness of the STSM control compared to the ADRC control.

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Huang, Wenxin, Yiru Wang und Lingyun Zhou. „Identify latent group structures in panel data: The classifylasso command“. Stata Journal: Promoting communications on statistics and Stata 24, Nr. 1 (März 2024): 46–71. http://dx.doi.org/10.1177/1536867x241233642.

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In this article, we introduce a new command, classifylasso, that implements the classifier-lasso method (Su, Shi, and Phillips, 2016, Econometrica 84: 2215–2264) to simultaneously identify and estimate unobserved parameter heterogeneity in panel-data models using penalized techniques. We document the functionality of this command, including 1) penalized least-squares estimation of group-specific coefficients and classification of unknown group membership under a certain number of groups; 2) two lasso-type estimators with robust standard errors, namely, classifier-lasso and postlasso; and 3) determination of the number of groups based on an information criterion. We further develop some postestimation commands to display and visualize the estimation results.

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Kim, Chang-Lae, und Yoon-Gyung Sung. „Robust Input Shapers for Acceleration-Limit Actuators“. Applied Sciences 13, Nr. 22 (20.11.2023): 12499. http://dx.doi.org/10.3390/app132212499.

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In this study, robust input shapers consisting of only three impulses are proposed for reducing the residual deflection of flexible systems with acceleration-limit actuators, while maintaining the robust control performance associated with system parameter uncertainties. The unequal acceleration and braking delays of such actuators can produce large residual oscillations owing to the distortion of shaped commands in undamped flexible systems during rest-to-rest operations. Thus, two types of robust input shapers are analytically developed using a phase vector approach with the adoption of the ramp-step function to approximate the dynamics of acceleration-limit actuators and with the utilization of conventional robust shapers. The proposed robust input shapers are numerically evaluated with respect to the command completeness effect, and the residual deflection and parameter uncertainties are experimentally validated using a mini bridge crane. The proposed robust shapers exhibit a higher robustness performance than classical robust input shapers.

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Oberfichtner, Michael, und Harald Tauchmann. „Stacked linear regression analysis to facilitate testing of hypotheses across OLS regressions“. Stata Journal: Promoting communications on statistics and Stata 21, Nr. 2 (Juni 2021): 411–29. http://dx.doi.org/10.1177/1536867x211025801.

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In empirical work, researchers frequently test hypotheses of parallel form in several regressions, which raises concerns about multiple testing. One way to address the multiple-testing issue is to jointly test the hypotheses (for example, Pei, Pischke, and Schwandt [2019, Journal of Business & Economic Statistics 37: 205–216] and Lee and Lemieux [2010, Journal of Economic Literature 48: 281–355]). While the existing commands suest (Weesie, 1999, Stata Technical Bulletin Reprints 9: 231–248) and mvreg enable Stata users to follow this approach, both are limited in several dimensions. For instance, mvreg assumes homoskedasticity and uncorrelatedness across sampling units, and neither command is designed to be used with panel data. In this article, we introduce the new community-contributed command stackreg, which overcomes the aforementioned limitations and allows for some settings and features that go beyond the capabilities of the existing commands. To achieve this, stackreg runs an ordinary least-squares regression in which the regression equations are stacked as described, for instance, in Wooldridge (2010, Econometric Analysis of Cross Section and Panel Data, p. 166–173, MIT Press) and applies cluster–robust variance–covariance estimation.

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Martinek, Radek, Jan Vanus, Jan Nedoma, Michael Fridrich, Jaroslav Frnda und Aleksandra Kawala-Sterniuk. „Voice Communication in Noisy Environments in a Smart House Using Hybrid LMS+ICA Algorithm“. Sensors 20, Nr. 21 (23.10.2020): 6022. http://dx.doi.org/10.3390/s20216022.

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This publication describes an innovative approach to voice control of operational and technical functions in a real Smart Home (SH) environment, where, for voice control within SH, it is necessary to provide robust technological systems for building automation and for technology visualization, software for recognition of individual voice commands, and a robust system for additive noise canceling. The KNX technology for building automation is used and described in the article. The LabVIEW SW tool is used for visualization, data connectivity to the speech recognizer, connection to the sound card, and the actual mathematical calculations within additive noise canceling. For the actual recognition of commands, the SW tool for recognition within the Microsoft Windows OS is used. In the article, the least mean squares algorithm (LMS) and independent component analysis (ICA) are used for additive noise canceling from the speech signal measured in a real SH environment. Within the proposed experiments, the success rate of voice command recognition for different types of additive interference (television, vacuum cleaner, washing machine, dishwasher, and fan) in the real SH environment was compared. The recognition success rate was greater than 95% for the selected experiments.

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Kung, Chien Chun, und Kuei Yi Chen. „Missile Guidance Algorithm Design Using Particle Swarm Optimization“. Applied Mechanics and Materials 284-287 (Januar 2013): 2411–15. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2411.

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This paper presents a technique to design a PSO guidance algorithm for the nonlinear and dynamic pursuit-evasion optimization problem. In the PSO guidance algorithm, the particle positions of the swarm are initialized randomly within the guidance command solution space. With the particle positions to be guidance commands, we predict and record missiles’ behavior by solving point-mass equations of motion during a defined short-range period. Taking relative distance to be the objective function, the fitness function is then evaluated according to the objective function. As the PSO algorithm proceeds, these guidance commands will migrate to a local optimum until the global optimum is reached. This paper implements the PSO guidance algorithm in two pursuit-evasion scenarios and the simulation results show that the proposed design technique is able to generate a missile guidance law which has satisfied performance in execution time, terminal miss distance, time of interception and robust pursuit capability.

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Livathinos, Nikolaos, Cesar Berrospi, Maksym Lysak, Viktor Kuropiatnyk, Ahmed Nassar, Andre Carvalho, Michele Dolfi, Christoph Auer, Kasper Dinkla und Peter Staar. „Robust PDF Document Conversion using Recurrent Neural Networks“. Proceedings of the AAAI Conference on Artificial Intelligence 35, Nr. 17 (18.05.2021): 15137–45. http://dx.doi.org/10.1609/aaai.v35i17.17777.

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The number of published PDF documents in both the academic and commercial world has increased exponentially in recent decades. There is a growing need to make their rich content discoverable to information retrieval tools. Achieving high-quality semantic searches demands that a document's structural components such as title, section headers, paragraphs, (nested) lists, tables and figures (including their captions) are properly identified. Unfortunately, the PDF format is known to not conserve such structural information because it simply represents a document as a stream of low-level printing commands, in which one or more characters are placed in a bounding box with a particular styling. In this paper, we present a novel approach to document structure recovery in PDF using recurrent neural networks to process the low-level PDF data representation directly, instead of relying on a visual re-interpretation of the rendered PDF page, as has been proposed in previous literature. We demonstrate how a sequence of PDF printing commands can be used as input into a neural network and how the network can learn to classify each printing command according to its structural function in the page. This approach has three advantages: First, it can distinguish among more fine-grained labels (typically 10-20 labels as opposed to 1-5 with visual methods), which results in a more accurate and detailed document structure resolution. Second, it can take into account the text flow across pages more naturally compared to visual methods because it can concatenate the printing commands of sequential pages. Last, our proposed method needs less memory and it is computationally less expensive than visual methods. This allows us to deploy such models in production environments at a much lower cost. Through extensive architectural search in combination with advanced feature engineering, we were able to implement a model that yields a weighted average F1 score of 97% across 17 distinct structural labels. The best model we achieved is currently served in production environments on our Corpus Conversion Service (CCS), which was presented at KDD18. This model enhances the capabilities of CCS significantly, as it eliminates the need for human annotated label ground-truth for every unseen document layout. This proved particularly useful when applied to a huge corpus of PDF articles related to COVID-19.

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Karimi, Mohammad Zia. „A Case Study on (EAVIBA) Enhanced Accessibility for Visually Impaired & Blind Artists using Machine Learning“. INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, Nr. 06 (12.06.2024): 1–5. http://dx.doi.org/10.55041/ijsrem35763.

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This research paper introduces EAVIBA, a pioneering voice-driven interface tailored to empower visually impaired and blind individuals in artistic pursuits. Rooted in principles of accessible design, EAVIBA seamlessly integrates voice commands, text-to-speech functionality, and a customizable graphical user interface. The study delves into EAVIBA's architecture, implementation of assistive technologies, and commitment to accessibility standards like the Web Content Accessibility Guidelines (WCAG). Through a robust iterative testing process, the paper evaluates the program, soliciting both qualitative and quantitative feedback on key aspects such as interface clarity, voice command recognition, and customization features. Objectives: The primary objectives of EAVIBA encompass developing an inclusive graphical user interface, implementing voice recognition and text-to-speech functionalities, providing creative tools and recommendations, enabling customization, and facilitating user feedback for continuous improvement. Method: The research employed a user-centric approach, incorporating principles of universal design in the graphical user interface. The integration of voice recognition and text-to-speech technologies, along with customizable features, was meticulously executed. Evaluation involved iterative user testing to gauge interface clarity, voice command recognition accuracy, and the efficacy of customization options. Findings: Quantitative data revealed a high degree of satisfaction among users, with an average recognition accuracy of voice commands exceeding 90%. Interface clarity received positive feedback, emphasizing the success of the high contrast mode and Blind User Mode. Users appreciated the customization options, with 80% indicating satisfaction with tailored voice commands. Novelty: EAVIBA's novelty lies in its holistic approach, addressing accessibility and fostering creativity. The integration of voice-driven interactions, high contrast modes, and creative recommendations distinguishes EAVIBA from existing solutions, presenting a comprehensive platform for visually impaired artists. Keywords: Assistive technologies, visually impaired, blind artists, voice-driven interface, machine learning, voice recognition.

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Lin, Hsiung Cheng, Chao Hung Chen und Liang Yih Liu. „Microprocessor-Based Control Using Local-Loop Approach in Robot Joint Movement“. Advanced Materials Research 268-270 (Juli 2011): 764–71. http://dx.doi.org/10.4028/www.scientific.net/amr.268-270.764.

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In recent years, the robot development has been fast expanding to many areas such as entertainment, home task, security, medical care, etc. Accordingly, this paper proposes a simple but reliable robot communication interface and local-loop control system based on RS232 and 8051 microprocessor, suitable use for various kinds of robot control. In this proposed scheme, the robot action commands stored in the database using C++ Builder can be transmitted from the Command-Transmission Microprocessor (CTM) and then received by the individual authorized Action-Processing Microprocessor (APM) via RS232. Real-time implementation results are presented to demonstrate the effectiveness of the proposed approach in term of robust, simple, flexible and efficient performance.

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Hauksdo´ttir, A. S., und G. Sigurðardo´ttir. „On the Use of Robust Design Methods in Vehicle Longitudinal Controller Design“. Journal of Dynamic Systems, Measurement, and Control 115, Nr. 1 (01.03.1993): 166–72. http://dx.doi.org/10.1115/1.2897392.

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A robustness-based methodology for designing a vehicle longitudinal controller is presented. The resulting controller, which is intended for point-following operations, is applied to velocity-dependent (slowly varying) automobile dynamics. The results obtained effectively demonstrate how robust design methods may be applied to this class of dynamics. Further, similar approaches might be applied to controller designs for vehicles under different operating modes, e.g., under car-following operations. The design consists of a cascade compensator, which is selected to achieve small tracking errors, and an observer/controller compensator. Kharitonov-related robustness methods are used to design a fixed (constant coefficient) observer/controller, such that the resulting closed-loop pole-clusters are confined to an acceptable area of the s-plane. The performance of the resulting overall system is evaluated using a large-signal, entry merging command and some small-signal mainline commands. The results are comparable to ones obtained by utilizing more complex controllers based on parameter (gain) scheduling [1,2] and nonlinear design methods [3] and designed to achieve a velocity-invariant response.

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Mathavaraj, S., und Radhakant Padhi. „Optimally Allocated Nonlinear Robust Control of a Reusable Launch Vehicle During Re-entry“. Unmanned Systems 08, Nr. 01 (Januar 2020): 33–48. http://dx.doi.org/10.1142/s230138502050003x.

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A nonlinear robust control design approach is presented in this paper for a prototype reusable launch vehicle (RLV) during the critical re-entry phase where the margin for error is small. A nominal control is designed following the dynamic inversion philosophy for the reaction control system (RCS) and optimal dynamic inversion philosophy for the aerodynamic control actuation. This nominal controller is augmented next with a barrier Lyapunov function based neuro-adaptive control in the inner loop, which enforces the body rates of the actual system i.e. in presence of uncertainties to track the closed-loop body rates of the nominal plant. A fusion logic is also presented for fusing the RCS and aerodynamic control. The control design approach presented here assures robust tracking of the guidance commands despite the presence of uncertainties in the plant model. Extensive nonlinear six degree-of-freedom (DoF) simulation study, which embeds additional practical constraints such as actuator delay in the aerodynamic control actuation and constraints related to the RCS, shows that the proposed design approach has both good command following as well as robustness characteristics.

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Alshaya, Abdullah, und Khaled Alhazza. „Smooth and robust multi-mode shaped commands“. Mechanical Systems and Signal Processing 168 (April 2022): 108658. http://dx.doi.org/10.1016/j.ymssp.2021.108658.

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Luo, Jianjun, Kai Jin, Mingming Wang, Jianping Yuan und Gefei Li. „Robust entry guidance using linear covariance-based model predictive control“. International Journal of Advanced Robotic Systems 14, Nr. 1 (01.01.2017): 172988141668750. http://dx.doi.org/10.1177/1729881416687503.

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For atmospheric entry vehicles, guidance design can be accomplished by solving an optimal issue using optimal control theories. However, traditional design methods generally focus on the nominal performance and do not include considerations of the robustness in the design process. This paper proposes a linear covariance-based model predictive control method for robust entry guidance design. Firstly, linear covariance analysis is employed to directly incorporate the robustness into the guidance design. The closed-loop covariance with the feedback updated control command is initially formulated to provide the expected errors of the nominal state variables in the presence of uncertainties. Then, the closed-loop covariance is innovatively used as a component of the cost function to guarantee the robustness to reduce its sensitivity to uncertainties. After that, the models predictive control is used to solve the optimal problem, and the control commands (bank angles) are calculated. Finally, a series of simulations for different missions have been completed to demonstrate the high performance in precision and the robustness with respect to initial perturbations as well as uncertainties in the entry process. The 3σ confidence region results in the presence of uncertainties which show that the robustness of the guidance has been improved, and the errors of the state variables are decreased by approximately 35%.

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Juričić, Đani, und Mina Žele. „ROBUST DETECTION OF FAULTS IN COMMAND INPUTS“. IFAC Proceedings Volumes 35, Nr. 1 (2002): 65–70. http://dx.doi.org/10.3182/20020721-6-es-1901.00742.

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Angeli, D., E. Mosca und A. Casavola. „Robust command governors for constrained linear systems“. IEEE Transactions on Automatic Control 45, Nr. 11 (2000): 2071–77. http://dx.doi.org/10.1109/9.887628.

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Ikni, Djamel, und Elena Raducan. „Stability Analysis of a Wind Turbine Controlled by Direct Torque Control“. Energies 17, Nr. 11 (22.05.2024): 2488. http://dx.doi.org/10.3390/en17112488.

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Increasingly, electricity network managers, through their grid codes, require renewable energy production systems to participate in system services, which includes requirements such as the stability of these production systems, the quality of the energy injected into the networks, the ability to withstand voltage dips, etc. To meet these requirements, the use of appropriate commands for the control of the production systems is necessary. Various control methods have been proposed, among which direct torque control (DTC) stands out. However, several studies have highlighted the impact of parametric variations on this control method. The contribution of the work presented in this article is the improvement of DTC when combined with a fuzzy estimate applied to a wind production system based on an asynchronous machine. Robustness tests were simulated to highlight the sensitivity of this control to variations in the stator resistance of asynchronous machines. To make this command robust and stable, a fuzzy estimator was used with this command. The simulation results demonstrated that this combination (DTC with a fuzzy estimator) makes the wind system more stable. To assess the effectiveness of the proposed solution, the root mean square error index was used.

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Wu, Zeliang, Jianchuan Ye und Tao Song. „Dynamic Event-Triggered Prescribed Performance Robust Control for Aggressive Quadrotor Flight“. Aerospace 11, Nr. 4 (11.04.2024): 301. http://dx.doi.org/10.3390/aerospace11040301.

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Aggressive flight has become increasingly important for expanding the applications of quadrotors. The typical characteristic of large and rapid changes in commands poses stringent demands on the maneuverability of quadrotors. Ensuring flight stability alone is not enough; dynamic responses must also be selectively constrained, presenting quadcopter flight control with daunting challenges. The prescribed performance control (PPC) method is seen as having the potential to solve this problem by allowing for the constrained control of specified performance, leading to extensive research. However, its practical application still faces challenges, such as the system divergence caused by errors exceeding boundaries due to sudden command mutations. This paper presents a robust dynamic event-triggered PPC (DETPPC) method for an aggressive quadrotor flight. By assessing the direction and proximity of tracking errors approaching constraint boundaries, a dynamic event-triggered compensation mechanism for performance function boundaries is established to mitigate the divergence caused by error surpassing and to preserve preset control over the targeted metrics. Controllers were designed for both the translational and rotational subsystems of the quadrotor, and stability analysis was conducted based on Lyapunov functions. Simulation tests on agile trajectory tracking and abrupt attitude control were carried out, demonstrating the effectiveness of the proposed method.

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Jiang, Qingji, Xiaogang Wang, Yuliang Bai und Yu Li. „Intelligent Online Multiconstrained Reentry Guidance Based on Hindsight Experience Replay“. International Journal of Aerospace Engineering 2023 (06.03.2023): 1–19. http://dx.doi.org/10.1155/2023/5883080.

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Traditional guidance algorithms for hypersonic glide vehicles face the challenge of real-time requirements and robustness to multiple deviations or tasks. In this paper, an intelligent online multiconstrained reentry guidance is proposed to strikingly reduce computational burden and enhance the effectiveness with multiple constraints. First, the simulation environment of reentry including dynamics, multiconstraints, and control variables is built. Different from traditional decoupling methods, the bank angle command including its magnitude and sign is designed as the sole guidance variable. Secondly, a policy neural network is designed to output end-to-end guidance commands. By transforming the reentry process into a Markov Decision Process (MDP), the policy network can be trained by deep reinforcement learning (DRL). To address the sparse reward issue caused by multiconstraints, the improved Hindsight Experience Replay (HER) method is adaptively combined with Deep Deterministic Policy Gradient (DDPG) algorithm by transforming multiconstraints into multigoals. As a result, the novel training algorithm can realize higher utilization of failed data and improve the rate of convergence. Finally, simulations for typical scenes show that the policy network in the proposed guidance can output effective commands in much less time than the traditional method. The guidance is robust to initial bias, different targets, and online aerodynamic deviation.

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Smith, Michael A., und J. Douglas Crawford. „Distributed Population Mechanism for the 3-D Oculomotor Reference Frame Transformation“. Journal of Neurophysiology 93, Nr. 3 (März 2005): 1742–61. http://dx.doi.org/10.1152/jn.00306.2004.

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Human saccades require a nonlinear, eye orientation–dependent reference frame transformation to transform visual codes to the motor commands for eye muscles. Primate neurophysiology suggests that this transformation is performed between the superior colliculus and brain stem burst neurons, but provides little clues as to how this is done. To understand how the brain might accomplish this, we trained a 3-layer neural net to generate accurate commands for kinematically correct 3-D saccades. The inputs to the network were a 2-D, eye-centered, topographic map of Gaussian visual receptive fields and an efference copy of eye position in 6-dimensional, push–pull “neural integrator” coordinates. The output was an eye orientation displacement command in similar coordinates appropriate to drive brain stem burst neurons. The network learned to generate accurate, kinematically correct saccades, including the eye orientation–dependent tilts in saccade motor error commands required to match saccade trajectories to their visual input. Our analysis showed that the hidden units developed complex, eye-centered visual receptive fields, widely distributed fixed-vector motor commands, and “gain field”–like eye position sensitivities. The latter evoked subtle adjustments in the relative motor contributions of each hidden unit, thereby rotating the population motor vector into the correct correspondence with the visual target input for each eye orientation: a distributed population mechanism for the visuomotor reference frame transformation. These findings were robust; there was little variation across networks with between 9 and 49 hidden units. Because essentially the same observations have been reported in the visuomotor transformations of the real oculomotor system, as well as other visuomotor systems (although interpreted elsewhere in terms of other models) we suggest that the mechanism for visuomotor reference frame transformations identified here is the same solution used in the real brain.

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Oustaloup, A., und B. Bergeon. „Frequency Space Synthesis of a Robust Dynamic Command“. IFAC Proceedings Volumes 20, Nr. 5 (Juli 1987): 301–6. http://dx.doi.org/10.1016/s1474-6670(17)55333-1.

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Bini, Stefano, Vincenzo Carletti, Alessia Saggese und Mario Vento. „Robust speech command recognition in challenging industrial environments“. Computer Communications 228 (Dezember 2024): 107938. http://dx.doi.org/10.1016/j.comcom.2024.107938.

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49

Hu, Yingyao, Guofang Huang und Yuya Sasaki. „robustpf: A command for robust estimation of production functions“. Stata Journal: Promoting communications on statistics and Stata 23, Nr. 1 (März 2023): 86–96. http://dx.doi.org/10.1177/1536867x231161977.

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We introduce a new command, robustpf, to estimate parameters of Cobb–Douglas production functions. The command is robust against two potential problems. First, it is robust against optimization errors in firms’ input choice, unobserved idiosyncratic cost shocks, and measurement errors in proxy variables. In particular, the command relaxes the conventional assumption of scalar unobservables. Second, it is also robust against the functional dependence problem of static input choice, which is known today as a cause of identification failure. The main method is proposed by Hu, Huang, and Sasaki (2020, Journal of Econometrics 215: 375–398).

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Featherstone, Roy. „A simple model of balancing in the plane and a simple preview balance controller“. International Journal of Robotics Research 36, Nr. 13-14 (09.02.2017): 1489–507. http://dx.doi.org/10.1177/0278364917691114.

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This paper presents a new model of the dynamics of a general planar robot balancing on a point in the plane, in which the essential parameters of the robot’s balancing behaviour are reduced to just two numbers, both of which are simple functions of basic physical properties of the robot mechanism. A third number describes the effect of other movements on the robot’s balance. This model gives rise to a simple preview balance controller consisting of a four-term control law with easily calculated gains and a reverse-time low-pass filter acting on a preview of the command signal. The filter makes the robot lean in anticipation of future movements. Simulation results are presented showing the balance controller achieving excellent tracking of large fast motion commands while simultaneously maintaining the robot’s balance and accurately rejecting disturbances caused by other motions being performed by the robot. The controller is also robust to effects such as actuator saturation and sensor noise.

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