Search results for "EKF"
showing 10 items of 13 documents
Wind component estimation for UAS flying in turbulent air
2019
One of the most important problem of autonomous flight for UAS is the wind identification, especially for small scale vehicles. This research focusses on an identification methodology based on the Extended Kalman Filter (EKF). In particular authors focus their attention on.the filter tuning problem. The proposed procedure requires low computational power, so it is very useful for UAS. Besides it allows a robust wind component identification even when, as it is usually, the measurement data set is affected by noticeable noises. (C) 2019 Elsevier Masson SAS. All rights reserved.
Ekfrasen som begivenhet
2021
Sammendrag Ekfrasebegrepet har vært gjenstand for mye diskusjon de siste tiårene. Denne artikkelen viser hvordan det har blitt lansert flere forslag til hvordan man kan legge bak seg en snever forståelse av møtet mellom tekst og bilde som en form for representasjon. Samtidig vises det hvordan løsningsforslagene virker sterkt fragmenterende og at de baserer seg på avgrensete perioder. I denne artikkelen lanseres begrepet «ekfrastisk begivenhet» som en alternativ formulering for å fange en bredere, kontekstuell forståelse av fenomenet. Samtidig innføres også begrepet «begivenhetshorisont» for å artikulere hvordan viktige institusjonelle og romlige premisser for ekfrasen har endret seg gjennom…
Flight Control Research Laboratory Unmanned Aerial System flying in turbulent air: an algorithm for parameter identification from flight data
2013
This work addresses the identification of the dynamics of the research aircraft FCRL (Flight Control Research Laboratory) used for the Italian National Research Project PRIN2008 accounting for atmospheric turbulence. The subject vehicle is an unpressurized 2 seats, 427 kg maximum take of weight aircraft. It features a non retractable, tailwheel, landing gear and a powerplant made up of reciprocating engine capable of developing 60 HP, with a 60 inches diameter, two bladed, fixed pitch., tractor propeller. The aircraft stall speed is 41.6 kts, therefore it is capable of speeds up to about 115 kts (Sea level) and it will be cleared for altitudes up to 10.000 ft. The studied aircraft is equipp…
Il culto della croce e la poesia per immagini: il caso della granadiglia nel diciassettesimo secolo
2011
The article focuses on an unknown phenomenon developed within the frame of the Counter-reformation Italy, in which interact the Catholic faith and a sort of transfer from painting to literature. At the time, the Latin-American flower maracock (maracuja), renamed granadilla by the Spanish conquistadores, was transformed by the Jesuits into Flos passionis/passionflower, whose components were forced to represent Christ crucifixion. From 1608 to the 1660s, priests and poets, like the well-known G. Botero and G. B. Marino, wrote poems on the passionflower on the basis of some unreal images spread by the Jesuits. Aiming at experiencing a new form of ancient ékfrasis, they had described the Passio…
An Algorithm for Parameter Identification of UAS from Flight Data
2014
The aim of the present work is to realize an identification algorithm especially devoted to UAS (unmanned aerial systems). Because UAS employ low cost sensor, very high measurement noise has to be taken into account. Therefore, due to both modelling errors and atmospheric turbulence, noticeable system noise has also to be considered. To cope with both the measurement and system noise, the identification problem addressed in this work is solved by using the FEM (filter error method) approach. A nonlinear mathematical model of the subject aircraft longitudinal dynamics has been tuned up through semi-empirical methods, numerical simulations and ground tests. To take into account model nonlinea…
La función del arte en la obra narrativa de Rafael Chirbes: del arte mercancía al metadiscurso
2018
International audience
Tēlotājmākslas objekta verbālā reprezentācija XX gs. sākuma latviešu dzejā
2013
Elektroniskā versija nesatur pielikumus
Kolmas merkitys toiseen : kinekfrasis suomalaisessa nykyrunoudessa
2016
In this article I develop the concept of kinekphrasis to designate a particular form of intermediality, speci cally, the verbal representation of cinema or other form of moving image. Kinekphrasis builds upon ekphrasis, the classical rhetorical term that today generally refers to texts about static artworks, such as paintings and statues. Representing the medial complex of cinema, however, sets a distinct sensorial and semiotic challenge to a text and brings about a form of intermediality di erent from the traditional ekphrasis. I exemplify kinekphrasis with a reading of contemporary Finnish poetry, namely, individual poems by Pauliina Haasjoki and V. S. Luoma-aho, and one book-length work,…
Ekfrasis sarjakuvassa : kuvan, sanan ja kuvataiteiden vuorovaikutus Timo Mäkelän sarjakuvanovellissa Kuolematon mestariteos
2010
Pro gradu -tutkielmani käsittelee sarjakuva-ekfrasiksen mahdollisuutta sarjakuvassa. Pyrin löytämään vastauksia seuraaviin kysymyksiin: miten ja millaisista teoreettisista lähtökohdista sarjakuva-ekfrasis rakentuu? Voidaanko sarjakuva-ekfrasiksen löytämiseksi luoda vakaata tulkintakehystä, ja pystyykö käsitteelle antamaan pätevää määritelmää? Hypoteesinani on, että sarjakuvan narratiivilla on erityinen merkitys sarjakuva-ekfrasiksen paikantamisessa. Tutkimuskysymykset ja hypoteesi ohjaavat ensin esittelemään teoreettisen viitekehyksen ja sitten soveltamaan rakentunutta teoriaa Timo Mäkelän Kuolematon mestariteos -sarjakuvanovellin analyysissa. Työn teoreettisena pohjana on pääosin käytetty …