Sökning: "UKF"

Hittade 4 uppsatser innehållade ordet UKF.

1. 1. Attenuation of Harmonic Distortion in Loudspeakers Using Non-linear Control

   Master-uppsats, Linköpings universitet/Linköpings universitet/ReglerteknikTekniska högskolan; Linköpings universitet/Linköpings universitet/ReglerteknikTekniska högskolan

   Författare :Marcus Arvidsson; Daniel Karlsson; [2012]
   Nyckelord :EKF; exact linearisation; feed-forward; loudspeaker modelling; non-linear control; UKF;

   Sammanfattning : The first loudspeaker was invented almost 150 years ago and even though much has changed regarding the manufacturing, the main idea is still the same. To produce clean sound, modern loudspeaker consist of expensive materials that often need advanced manufacturing equipment. LÄS MER

3. 2. UKF and EKF with time dependent measurement and model uncertainties for state estimation in heavy duty diesel engines

   Master-uppsats, Linköpings universitet/Fordonssystem; Linköpings universitet/Fordonssystem

   Författare :Henrik Berggren; Martin Melin; [2011]
   Nyckelord :kalman filtering; sensor fusion; signal processing;

   Sammanfattning : The continuous challenge to decrease emissions, sensor costs and fuel consumption in diesel engines is battled in this thesis. To reach higher goals in engine efficiency and environmental sustainability the prediction of engine states is essential due to their importance in engine control and diagnosis. LÄS MER

4. 3. OFDM Systems Offset Estimation and Cancellation Using UKF and EKF

   Master-uppsats, Linnéuniversitetet/Institutionen för datavetenskap, fysik och matematik, DFM; Linnéuniversitetet/Institutionen för datavetenskap, fysik och matematik, DFM

   Författare :Dinsefa Mustefa; Ermias Mebreku; [2011]
   Nyckelord :Orthogonal Frequency Devision Multiplexing; Inter carrier interference; Unscented Kalman filter; Extended Kalman filter; Frequency offset; Estimation; Compensation; OFDM; UKF; EKF; ICI; ISI;

   Sammanfattning : Orthogonal Frequency Division Multiplexing (OFDM) is an efficient multi- carrier modulation scheme, which has been adopted for several wireless stan- dards. Systems employing this scheme at the physical layer are sensitive to frequency offsets and that causes Inter Carrier Interference (ICI) and degra- dation in overall system performance of OFDM systems. LÄS MER

5. 4. Performance comparison of extended and unscented kalman filter implementation in INS-GPS integration

   Master-uppsats, Luleå/Space Science, Kiruna

   Författare :Joshy Madathiparambil Jose; [2009]
   Nyckelord :INS-GPS integration; Unscented Kalman Filter; Extended; Kalman Filter; GPS; Inertial Navigation System;

   Sammanfattning : The objective of this thesis is to implement an unscented kalman filter for integrating INS with GPS and to analyze and compare the results with the extended kalman filter approach. In a loosely coupled integrated INS/GPS system, inertial measurements from an IMU (angular velocities and accelerations in body frame) are integrated by the INS to obtain a complete navigation solution and the GPS measurements are used to correct for the errors and avoid the inherent drift of the pure INS system. LÄS MER