A 6DOF/Hil setup for wind tunnel hybrid tests on a 1/75 scale model of a 10 MW floating wind turbine

This paper deals with the design of a 6 degrees-of-freedom (DoF) robot for Hardware-In-The-Loop wind tunnel tests of floating offshore wind turbines (FOWT) and its experimental implementation. This setup allow to perform wind tunnel tests with a physical scale model of a wind turbine and to provide the motion at the base of the tower thanks to a 6-DoF Hexaslide robot with parallel kinematics. The motion is given consistently with real time combination of measurements (aerodynamic forces) and computations (hydrodynamic forces). The paper presents an overview of the design process of the robot as well as a description of the corresponding integrated numerical model based on MSC-Adams/Adwimo/MATLAB-Simulink co-simulation environment to account for the complete dynamic system (robot, wind turbine, control, HIL algorithm). The structural model of the wind turbine has been verified against the experimental modal analysis on the scale model. The complete model has been validated against a reduced order experimental setup (2-DoF), in terms of the aerodynamic forces computed in dynamic conditions (imposed motion tests) as well as HIL methodology effectively implemented for various conditions (free decay in still water and air, irregular sea state with wind). The main results of such a validation are reported showing promising extension outputs considering the ongoing extension to 6-DoF, making this tool valuable of numerical benchmark and wind tunnel design of experiments (DoE)

Kinematics and Robot Design I, KaRD2018

This volume collects the papers published on the Special Issue “Kinematics and Robot Design I, KaRD2018” (https://www.mdpi.com/journal/robotics/special_issues/KARD), which is the first issue of the KaRD Special Issue series, hosted by the open access journal “MDPI Robotics”. The KaRD series aims at creating an open environment where researchers can present their works and discuss all the topics focused on the many aspects that involve kinematics in the design of robotic/automatic systems. Kinematics is so intimately related to the design of robotic/automatic systems that the admitted topics of the KaRD series practically cover all the subjects normally present in well-established international conferences on “mechanisms and robotics”. KaRD2018 received 22 papers and, after the peer-review process, accepted only 14 papers. The accepted papers cover some theoretical and many design/applicative aspects

3-Axis and 5-Axis Machining with Stewart Platform

Ph.DDOCTOR OF PHILOSOPH

Általános nyelvészeti tanulmányok XXIX. - Kísérletes nyelvészet

Ez a kötet kísérletes nyelvészeti tanulmányokat tartalmaz, azaz olyan kutatások eredményeit ismerteti, amelyek egy tág értelemben vett „laboratóriumban" végzett kísérletek eredményein alapulnak. A kötet koncepciója szerint mind a legmodernebb technikai eszközrendszerekkel felszerelt kísérleti laboratóriumi struktúra, mind valamilyen speciális terep (óvoda, iskola, rehabilitációs intézet), mind pedig az internet, például a Facebook is szolgálhat kísérlet lefuttatásának kereteként. A nyelvészetben alkalmazott kísérletek módszertana természetesen követi a tudományos kísérletek általános paradigmáját és megőrzi annak lényeges jegyét: hogy megismételhető, objektív legyen. Amíg számos interdiszciplináris területen, így például a neurolingvisztikában és a pszicholingvisztikában, a tudományos kísérleteket a 19. század óta alkalmazzák, addig az olyan nyelvészeti témákban, mint a nyelvtan készítése, a nyelvleírás, viszonylag újabb fejlemény a kísérletes módszertan alkalmazása. Ezt sok minden motiválta, többek között a kurrens nyelvészeti modellek, elméletek és variánsaik versengései és ennek kapcsán olyan objektív bizonyítékok keresése, amelyek csak kísérleti helyzetekben állíthatók elő. Kötetünk tanulmányait négy tematikus egység szerint csoportosítottuk: 1. Nyelvleírási kérdések, 2. Nyelvelsajátítás, 3. A mesterségesnyelvtan-elsajátítási paradigma alkalmazásai, 4. Nyelvi zavarok. A szerzők között nemcsak a terület jelentős ismertségű személyiségei, hanem külföldről korábban hazatért, vagy más országokban dolgozó és az itthoniakkal szoros kapcsolatokat fenntartó, sőt Magyarországon működő külföldi kutatók is megtalálhatók, példázva a magyarországi nyelvészet nemzetközi beágyazottságát. Nyolc tanulmány esetében a szerzők mellékeltek a kísérleteik hátteréhez, például az adatbázisokhoz, vagy a keretként szolgáló kutatási projekthez és kutatócsoporthoz elvezető internetes linkeket, melyeket QR-kódok formájában adunk meg. A QR-kódok okostelefonnal azonnal aktív linkekre fordíthatók

Kinematics and Robot Design IV, KaRD2021

This volume collects the papers published on the special issue “Kinematics and Robot Design IV, KaRD2021” (https://www.mdpi.com/journal/robotics/special_issues/KaRD2021), which is the forth edition of the KaRD special-issue series, hosted by the open-access journal “MDPI Robotics”. KaRD series is an open environment where researchers can present their works and discuss all the topics focused on the many aspects that involve kinematics in the design of robotic/automatic systems. Kinematics is so intimately related to the design of robotic/automatic systems that the admitted topics of the KaRD series practically cover all the subjects normally present in well-established international conferences on “mechanisms and robotics”. KaRD2021, after the peer-review process, accepted 12 papers. The accepted papers cover some theoretical and many design/applicative aspects

Why Jesus and Job spoke bad Welsh : the origin and distribution of V2 orders in Middle Welsh

This thesis covers a wide range of topics from historical to computational and corpus linguistics as well as synchronic and diachronic syntax and information structure. The latest insights in each of these sub-fields of linguistics are necessary to address what has been a vexed problem in the study of Middle Welsh for a long time. Middle Welsh word order is particularly puzzling, because there is a wide range of verb-second patterns and the distribution of those is not at all clear. Secondly, these so-called 'Abnormal Orders' are only found in the Middle Welsh period; Old and Modern Welsh mainly exhibit verb-initial patterns. Verb-second orders are shown to have developed from earlier patterns with hanging topics and focussed cleft constructions by carefully reconstructing their syntactic history in Old Welsh and related Celtic languages. A detailed analysis of a syntactically and pragmatically annotated corpus, built especially for this thesis, reveals that a combination of these features explains which word-order pattern appears in which particular context. From a diachronic syntactic point of view, Middle Welsh shares some crucial developments in the rise of V2 with Early Romance, but it differs in others.Descriptive and Comparative Linguistic

A Posture Sequence Learning System for an Anthropomorphic Robotic Hand

The paper presents a cognitive architecture for posture learning of an anthropomorphic robotic hand. Our approach is aimed to allow the robotic system to perform complex perceptual operations, to interact with a human user and to integrate the perceptions by a cognitive representation of the scene and the observed actions. The anthropomorphic robotic hand imitates the gestures acquired by the vision system in order to learn meaningful movements, to build its knowledge by different conceptual spaces and to perform complex interaction with the human operator

Contributions of synaptic filters to models of synaptically stored memory

The question of how neural systems encode memories in one-shot without immediately disrupting previously stored information has puzzled theoretical neuroscientists for years and it is the central topic of this thesis. Previous attempts on this topic, have proposed that synapses probabilistically update in response to plasticity inducing stimuli to effectively delay the degradation of old memories in the face of ongoing memory storage. Indeed, experiments have shown that synapses do not immediately respond to plasticity inducing stimuli, since these must be presented many times before synaptic plasticity is expressed. Such a delay could be due to the stochastic nature of synaptic plasticity or perhaps because induction signals are integrated before overt strength changes occur.The later approach has been previously applied to control fluctuations in neural development by low-pass filtering induction signals before plasticity is expressed. In this thesis we consider memory dynamics in a mathematical model with synapses that integrate plasticity induction signals to a threshold before expressing plasticity. We report novel recall dynamics and considerable improvements in memory lifetimes against a prominent model of synaptically stored memory. With integrating synapses the memory trace initially rises before reaching a maximum and then falls. The memory signal dissociates into separate oblivescence and reminiscence components, with reminiscence initially dominating recall. Furthermore, we find that integrating synapses possess natural timescales that can be used to consider the transition to late-phase plasticity under spaced repetition patterns known to lead to optimal storage conditions. We find that threshold crossing statistics differentiate between massed and spaced memory repetition patterns. However, isolated integrative synapses obtain an insufficient statistical sample to detect the stimulation pattern within a few memory repetitions. We extend the modelto consider the cooperation of well-known intracellular signalling pathways in detecting storage conditions by utilizing the profile of postsynaptic depolarization. We find that neuron wide signalling and local synaptic signals can be combined to detect optimal storage conditions that lead to stable forms of plasticity in a synapse specific manner.These models can be further extended to consider heterosynaptic and neuromodulatory interactions for late-phase plasticity.<br/