Sökning: "Christoffer Fjellstedt"

Hittade 2 uppsatser innehållade orden Christoffer Fjellstedt.

1. 1. Methods for including stiffness parameters from reduced finite element models in simulations of multibody systems

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets elektronik

   Författare :Christoffer Fjellstedt; [2019]
   Nyckelord :model order reduction; lumped element methods; lumped parameter methods; robotics; robot mechanics; simulations; constrained multibodies; Dymola;

   Sammanfattning : Two methods using lumped element (lumped parameter) methods to model flexible bodies have been presented. The methods are based on the concept of using a Guyan reduced stiffness matrix to describe the elasticity of a body. LÄS MER

3. 2. Simulations of vertical axis wind turbines with PMSG and diode rectification to a mutual DC-bus

   Kandidat-uppsats, Uppsala universitet/Institutionen för teknikvetenskaper

   Författare :Fjellstedt Christoffer; [2017]
   Nyckelord :vertical axis wind turbines; VAWT; mutual DC-bus; mutual topology; simulations; diode rectification;

   Sammanfattning : Transient simulations were performed with MATLAB Simulink on a mutual wind park topology, where three vertical axis wind turbines equipped with permanent magnet synchronous generators were connected to a mutual DC-bus through passive diode rectification. The aim with the work was to show the effects of two different kinds of loads on the system in respect to generator torque, rotor speed, produced power by the generators and the power on the DC-bus. LÄS MER