Now showing items 1-20 of 306

    • A lattice model for elastic particulate composites 

      Zabulionis, Darius; Rimša, Vytautas (Materials, 2018)
      In the present article, a version of the lattice or spring network method is proposed to model the mechanical response of elastic particulate composites with a high volume fraction of spherical particles and with a much ...
    • A short history of seminars on “Recent research and design progress in aeronautical engineering and its influence on education” 

      Goraj, Zdobyslaw; Stankūnas, Jonas; Kleinhofs, Martinsh; Pištek, Antonin; Mikita, Villu (Aviation, 2007)
      This article describes a short history of seminar on “Recent Research and Design Progress in Aeronautical Engineering and its Influence on Education ”. The first seminar was organised by Warsaw University of Technology in ...
    • Absorption of energy exploitation during impact of aircraft 

      Žiliukas, Antanas; Fiodorova, Nina (Aviation : research Journal of Vilnius Gediminas Technical University, 2004)
      The article shows the variation of stopping distance as a function of deceleration and velocity change derived from the standard Newtonian equations for assumed constant acceleration. Note that the time to stop is equal ...
    • Accuracy and performance of augmentations to global navigation systems outside their areas of coverage 

      Stankūnas, Jonas; Jakučionis, Algimantas; Petrusevičius, Vytis (Aviation, 2005)
      Signals broadcasted by Global Positioning System are a good solution for aircraft navigation in remote areas where conventional ground-based navigation means do not exist. In the world of avionics, more and more navigation ...
    • Adaptation of Dubins paths for UAV ground obstacle avoidance when using a low cost on-board GNSS sensor 

      Kikutis, Ramūnas; Stankūnas, Jonas; Rudinskas, Darius; Masiulionis, Tadas (Sensors, 2017)
      Current research on Unmanned Aerial Vehicles (UAVs) shows a lot of interest in autonomous UAV navigation. This interest is mainly driven by the necessity to meet the rules and restrictions for small UAV flights that are ...
    • Aerodinaminių modifikacijų tyrimas 

      Bajorinas, Marius (Aviacijos technologijos = Aviation technologies, 2014)
      Straipsnyje aprašyti aerodinaminių modifikacijų, pritaikytų antžeminiam transportui, privalumai, apžvelgtos naudotos programos. Pateikiami bandymo rezultatai ir tolimesnė tyrimo kryptis.
    • Aerodrominio radiolokatoriaus elektromagnetinės situacijos vertinimas 

      Peckus, Mindaugas (Aviacijos technologijos = Aviation technologies, 2014)
      Šiame straipsnyje nagrinėjama aerodromo radiolokatoriaus elektromagnetinė situacija, apžvelgti iki šiol atlikti moksliniai darbai bei publikuoti straipsniai šia tematika. Teorinėje dalyje yra paaiškinta radionavigacijos ...
    • Air transport growth and its impact on the environment in EU countries and Lithuania 

      Stankūnas, Jonas; Vaitonytė, Karolina (Вiсник Нацiонального авiацiйного унiверситету : науковий журнал, 2003)
      Tendencies in European Union and candidate countries transport system development, its impact on the environment, volume and kinds of losses caused by transport, tendencies in the Lithuanian air transport development are ...
    • “Airbus A320” 

      Novakov, Vladimir; Žilienė, Dalia (Aviacijos technologijos = Aviation technologies, 2014)
      Straipsnyje aprašoma, kodėl “Airbus” 320” modelio orlaivis buvo pasirinktas optimalaus skrydžio planavimui. Trumpai supažindinimą su kompanijos “Airbus” istorija. Apžvelgiamas visas “Airbus” orlaivių gamybos procesas, darbo ...
    • Akustinių ir optinių interferencinių metodų panaudojimas tenzometrinių kanalų sudarymui 

      Malinauskas, Romualdas; Pileckas, Eugenijus (Aviacija, 1999)
      Siūloma dinaminių tenzometrinių kanalų realizacija, panaudojant akustinius ir optinius interferencinius deformacijų matavimo metodus. Aprašomos akustinio ir optinio tenzometrinių interferometrų schemos.
    • Algae cell wall disruption by electrohydraulic shock 

      Borodinas, Sergejus; Vasiljev, Piotr; Bareikis, Regimantas; Struckas, Arūnas; Kasperovičienė, Jūratė (Journal of vibroengineering, 2016)
      Biofuel production from algae oil is one of the most attractive process technologies. Few principles of algae cell disruption are presented on the market and introduced on the conference. Mainly, mechanical, thermal and ...
    • Alternatyvių energijos šaltinių taikymo autonominiuose orlaiviuose apžvalga 

      Ramanauskas, Vytautas (Aviacijos technologijos = Aviation technologies, 2015)
      Orlaivių skrydžio ore trukmę riboja baigtiniai energijos šaltiniai. Alternatyvių arba kombinuotų sistemų naudojimas leidžia šią trukmę prailginti. Šiame straipsnyje aptariami terminių srautų, saulės bei lazerio spinduliu ...
    • Analoginio skaitmeninio keitiklio paklaidos 

      Amulis, Mantas (Aviacijos technologijos = Aviation technologies, 2013)
      Tyrimo metu nagrinėtas analoginis skaitmeninis keitiklis. Išanalizuota keitiklio perdavimo funkcija; kvantavimo, adityvinė ir apertūrinė paklaidos; diferencialinis keitiklio funkcijos netiesiškumas bei integralinis keitiklio ...
    • Analysis of accuracy of measurement by Doppler laser meters 

      Skeivalas, Jonas; Giniotis, Vytautas (Optical Engineering, 2003)
      We discuss the accuracy analysis of laser meters based on the Doppler effect and used in the measurement of automobile velocity. Usually, the systematic errors are assessed during calibration and are eliminated by instrumental ...
    • Analysis of airspace organization considering air traffic flows 

      Kondroška, Vaidotas; Stankūnas, Jonas (Transport, 2012)
      The aim of research is to define a methodology allowing the organization of regional airspace according to the flows of air traffic and subsequently enabling to solve flight efficiency problems related to air traffic ...
    • Analysis of calculation results of lift and drag forces for several wings using nonlinear section data 

      Pakalnis, Egidijus; Lasauskas, Eduardas; Stankūnas, Jonas (Aviation, 2005)
      Calculation results for 11 different finite span wings are presented. Calculations were made by a combination of a numerical solution of lifting line theory with a technique developed to evaluate nonlinear section lift ...
    • Analysis of discretisation strategy for area and space measurement 

      Giniotis, Vytautas; Mariūnas, Darius (Geodezija ir kartografija, 2005)
      Measurement strategy is discussed in the article. It is important to optimise the data selection (sampling) from the object for the determination of its geometrical features within some limits of accuracy. The minimal and ...
    • Analysis of modified discretization methods for the measurement volume 

      Mariūnas, Darius; Giniotis, Vytautas (Aviation, 2004)
      The analysis performed in the paper shows that the effectiveness of discretization methods depends on the accuracy of the evaluation of the parameters of local surface errors and on the characteristics of the regression ...
    • Analysis of pulsed electromagnetic fields radiated by powerful sources 

      Maceika, Kazimieras Vytautas (Advances in electrical and electronic engineering, 2008)
      Calculation method proposed for powerful sources radiation evaluation. Taken attention that in calculations it is necessary to use average radiated power. For example in case of radars it depends on two facts: radar radiates ...
    • Analysis of short range measurements in the space 

      Giniotis, Vytautas; Stankūnas, Jonas (Aviacija: mokslo žurnalo "Transportas" priedas : Nr. 5: skirtas 400-sioms raketų mokslo pradininko Kazimiero Semenavičiaus gimimo metinėms ir 350-sioms jo knygos "Artis magnae artilleriae parts prima" išleidimo metinėms, 2000)
      The equipment is proposed for the position accuracy control of the flying objects in short-range space. It has some advantages over other observation or tracking systems. It has quite a wide range of applications and ...