Essays about: "Impedance matrix method"

Found 5 essays containing the words Impedance matrix method.

  1. 1. Pulse Charging of Li-ion Batteries for Enhanced Life Performance

    University essay from KTH/Kemiteknik

    Author : Josefin Strandberg; [2023]
    Keywords : Li-ion battery; Pulse charging; Cyclic aging; Capacity fade; Internal resistance; Battery impedance; Litiumjonbatteri; Pulsad laddning; Cyklisk åldring; Kapacitetsminskning; Inre resistans; Batteriimpedans;

    Abstract : Det överhängande behovet av att minska utsläppen av växthusgaser för att uppfylla Parisavtalet har väckt ett ökat intresse för elektrifiering som en strategi för att mildra klimatförändringarna. Litiumjonbatterier spelar en central roll vid elektrifiering och har framträtt som det primära alternativet för batteridrivna elfordon. READ MORE

  3. 2. IC-Engine Source Characterisation and exhaust system simulations

    University essay from KTH/Marcus Wallenberg Laboratoriet MWL

    Author : Pontus Gräsberg; [2021]
    Keywords : IC-engine; source characteristics; Multiload method; one-port source; exhaust system; Bränslemotor; källkarakterisering; avgassystem;

    Abstract : To be able to predict the sound pressure level emitted by a exhaust system one must be able to describe the source. The source in the form of an engine can linearly be described as a source strength and a source impedance. An IC-engine can acoustically have a non-linear part meaning that the source characteristics have a dependency on the load. READ MORE

  4. 3. A Study of the Viscous Effects over an Acoustic Liner using the Linearised Navier-Stokes equations in the Frequency Domain

    University essay from KTH/Farkost och flyg

    Author : Borja Pascual José; [2016]
    Keywords : ;

    Abstract : New noise regulations for civil aviation restrict the sound level that engines can emit to a great extent. Acoustic liners are the most widespread solution in order to damp sound in aircraft engines. Usually the Linearised Euler equations (LEE) are used to calculate the sound propagation through the engine. READ MORE

  5. 4. Transfer Path Analysis of a Passenger Car

    University essay from KTH/MWL Marcus Wallenberg Laboratoriet

    Author : Jakub Cinkraut; [2015]
    Keywords : Transfer Path Analysis TPA ; Tyre cavity resonance; Deflection shape analysis; Source Path Contribution SPC SW; Impedance matrix method; Road decomposition method;

    Abstract : Even though there are no regulations on the interior noise level of passenger cars, it is a significant quality aspect both for customers and for car manufacturers. The reduction of many other car noise sources pushed tyre road noise to the forefront. READ MORE

  6. 5. Efficient analysis of 2D antenna arraysusing the ASM-MBF method

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Sergio Amaya Maldonado; [2011]
    Keywords : ;

    Abstract : The analysis of large-scaled 2D finite planar arrays with the Method of Momentsrelying on the RWG basis functions requires a huge amount of memory for saving theequation system and a long computation time for solving the surface current distribu-tion. In this project, the Array Scanning Method - Macro Basis Function (ASM-MBF)method created by Craeye is implemented in an existing MoM’s code in order to verifythe reduction of the equation system keeping a good accuracy. READ MORE