Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: Simscape

Sortuj według:

Ogranicz wyniki do:

A simulation model for small aircraft fuel system design

Mazzitelli Leonardo, Watanabe Paulo, Teixeira José C., Machado José

Technologia i Automatyzacja Montażu

2023

nr 4

28--37

An aircraft fuel system is responsible for storing, managing and properly delivering fuel to the engines. Fuel systems models are used to simulate various configurations and analyse how the system responds to different flight conditions and failure scenarios. In this paper, a generic aircraft fuel system model architecture is proposed and modelled using MATLAB and Simulink’s Simscape add-on to analyse the pressure and flow rate variations in different locations of the system. The model capabilities are explored with meaningful simulations and analyses focused on the feed and transfer functions, such as the sensitivity analysis of the scavenge jet pump, showing that the position where the jet pump is assembled in the wing can highly impact its performance. Additionally, the wing dihedral is modelled and simulated to prove that a positive dihedral angle benefits the fuel transfer and helps minimize unusable fuel quantities. The results also demonstrate how computational tools such as Simscape Fluids can be integrated with MATLAB and used on the system’s modelling, providing a reference for small aircraft fuel system design and an approach for analysing complicated non-linear systems.

Układ paliwowy samolotu odpowiada za przechowywanie, zarządzanie i prawidłowe dostarczanie paliwa do silników. Modele układów paliwowych służą do symulacji różnych konfiguracji i analizy reakcji systemu na różne warunki lotu i scenariusze awarii. W tym artykule zaproponowano ogólną architekturę modelu układu paliwowego samolotu, którą zamodelowano przy użyciu programu MATLAB i dodatku Simulink Simscape w celu analizy zmian ciśnienia i natężenia przepływu w różnych lokalizacjach układu. Możliwości modelu bada się za pomocą znaczących symulacji i analiz skupiających się na funkcjach zasilania i przenoszenia, takich jak analiza czułości przepłukiwania pompy strumieniowej, pokazująca, że położenie pompy strumieniowej zamontowanej w skrzydle może mieć duży wpływ na jej działanie. Dodatkowo modeluje się i symuluje dwuścienny skrzydło, aby wykazać, że dodatni kąt dwuścienny korzystnie wpływa na transfer paliwa i pomaga zminimalizować nieużyteczne ilości paliwa. Wyniki pokazują również, w jaki sposób narzędzia obliczeniowe, takie jak Simscape Fluids, można zintegrować z MATLAB-em i wykorzystać w modelowaniu systemu, zapewniając odniesienie do projektowania układów paliwowych małych samolotów i podejście do analizy skomplikowanych układów nieliniowych.

Transient Energy Models of Housing Facilities Operation

Deshko Valerii, Bilous Inna, Biriukov Dmytro, Yatsenko Olena

Rocznik Ochrona Środowiska

2021

Tom 23

539--551

Buildings are the main consumer of energy resources in the total energy balance of the countries in Central and Eastern Europe, the main energy consumption is allocated for heating. Efficient use of energy resources for heating needs to a large extent depends on the efficiency of regulation of heating systems. In the article, dynamic mathematical models of a two-room typical apartment in Ukraine, built in 2016, were developed in Matlab and EnergyPlus software environment. The simulations were carried out using IWEC hourly climate data for the city of Kyiv. The results of simulations of thermal energy consumption in Matlab are characterized by a larger range of fluctuations of the heating system load, which is typical for the real operating conditions of the system with the controller of ON/OFF type. In EnergyPlus it is assumed that the gas boiler operates continuously in the ON mode. In the research, the change of load on the apartment heating system was studied at different numbers and locations of air temperature control sensors installation, according to which the controller of the autonomous gas boiler operates.

Design and Simulation of Cyclic Battery Tester

Bilansky Juraj, Lacko Milan

Power Electronics and Drives

2020

Vol. 5 (40)

229--241

The paper presents an approach to the modelling of a cyclic battery tester and contains observations about lithium-ion (Li-ion) batteries, charging/discharging procedures, conditions and protections which must be observed during the testing process. The main goal was to create and simulate a schematic which will be capable of cyclically testing Li-ion battery cells. Regulation of the final schematic is based on cascade connections of operation amplifiers, which work as a voltage source with current-limiting functions. The power part is created by two MOSFETs connected as a half-bridge. This topology allows current to flow in both directions (from and to the battery). Final simulation is supplemented by protections such as reverse polarity protection, short circuit protection and overvoltage protection during charging. Proper operation of the whole connection is demonstrated by the simulation outputs in the final section.