115 research outputs found

    Opportunities of computer-aided building energy consumption design

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    Quadkopter szimulációja LabVIEW környezetben = Simulation of a Quadcopter with LabVIEW

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    The aim of the paper was to create a LabVIEW-based Real-Time embedded system supported development environment, which was used for the Real-Time kinematics and dynamics simulation of a quad copter as well as the adherent state-feedback controller. The state-feedback controller was designed with Linear Quadratic Regulator (LQR) based method.A cikk célja, hogy egy olyan LabVIEW alapú valós idejű beágyazott rendszerrel támogatott fejlesztőkörnyezetet hozzunk létre, melyet felhasználtunk egy quadkopter valós idejű kinematikai és dinamikai valós idejű szimulációjára, valamint a hozzátartozó állapot visszacsatoló szabályozóra. Az állapot visszacsatoló szabályozó tervezésért LQR alapú módszerrel terveztük

    Opportunities of computer-aided building energy consumption design

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    Nowadays a significant part of energy is consumed in buildings. In order to reduce the energy consumption different retrofit technologies are applied. As every building and every energy consumer is different the same modernization technic can not be used for all buildings. This paper shows a computer aided opportunity which is able to simulate different modernization technic for the same building in order to the best opportunity can be selected. The paper highlights the advantages of computer-aided building design and the opportunities of optimization techniques in a new under design building case. This paper also contains examples in order to introduce this modelling method

    Brushless DC Motor Modeling Using Bond Graph Method and Control using LabVIEW

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    This paper aims to simulate and control a three-phase Brushless DC Motor. Bond Graph method has been used to obtain fast and simple dynamic model. The system has been controlled by classical PID controller. All the paper results were fulfilled using LabVIEW program

    Proposal of a Secure Modbus RTU communication with Adi Shamir’s secret sharing method

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    Drinking fresh water, turning the lights on, travelling by tram, calling our family or getting a medical treatment are usual activities, but the underlying SCADA (Supervisory Control and Data Acquisition) systems like CIS (Critical Infrastructure Systems), ICS (Industrial Control Systems) or DCS (Distributed Control Systems) were always the target of many types of attacks, endangered the above mentioned simple activities. During the last decades because of the fast spread of the internet based services and the continuous technical development these systems become more vulnerable than ever. Full reconstruction and innovative changes in older SCADA systems has high cost, and it is not always rewarding. Communication protocols as Modbus (1979) serve as a main basis for SCADA systems, so security of Modbus has a major impact of the security of SCADA systems. Our paper raises and answers questions about the security of the Modbus RTU protocol. We focus on the serial Modbus protocol, because in that method we found many unsolved problems, like lack of authentication of the participants, lack of secure channel and so on. The aim of this paper to propose a secure communication alternative for Modbus RTU @ RS485 wire. The main advantage of the proposed method is the coexistence with traditional slaves and bus systems and only software update is necessary

    Omnidirekcionális robot megvalósítása, dinamikai és mozgásszabályozási tulajdonságainak mérése

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    Ez a kutatás a National Instruments által forgalmazott omnidirekcionális platformok teljestő képességét foglalja össze
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