Sökning: "power spectral density PSD"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden power spectral density PSD.

1. 1. Developing a portable, customizable, single-channel EEG device for homecare and validating it against a commercial EEG device

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Máté Károly Tóth; [2023]
   Nyckelord :Electroencephalography EEG ; Portable EEG; Single-channel EEG; Commercial EEG; Brain-machine interface; Prototype development; Elektroencefalografi EEG ; Bärbar EEG; Enkanaligt EEG; Kommersiellt EEG; Hjärna-maskin-gränssnitt; Prototyputveckling;

   Sammanfattning : There are several commercial electroencephalography (EEG) devices on the market; however, affordable devices are not versatile for diverse research applications. The purpose of this project was to investigate how to develop a low-cost, portable, single-channel EEG system for a research institute that could be used for neurofeedback-related applications in homecare. LÄS MER

3. 2. Improved Bridge Load Capacity via Dynamic Train-Track-Bridge Interaction : Assessing the dynamic amplification factor caused by measured track irregularities for rail freight transport

   Master-uppsats, KTH/Bro- och stålbyggnad

   Författare :Muhannad Asaad; [2023]
   Nyckelord :;

   Sammanfattning : The carbon impact of transportation is large and requires sustainable solutions. With expected population growth, rail transportation plays a vital role in facilitating a greener Europe. The expansion of the rail infrastructure is therefore of essential importance for future challenges. LÄS MER

4. 3. Experimental acceleration Measurements and Finite Elements Modeling

   Magister-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

   Författare :Ibrahim Alnimairi; Salim Arrabi; [2021]
   Nyckelord :signal processing. PSD; mode shapes; Mdof; Sdof; PSDT-SVD; finite element modelling;

   Sammanfattning : Heavy crushing machines under their production shifts, creates various levels of vibration, noise and dynamic forces which can be transferred to other parts of the industrial unit. Such kind of factors applies continuous forces on machine parts which can cause gradual fatigue, creep and eventually failure of machine. LÄS MER

5. 4. Parametric Studies of Train-Track-Bridge Interaction : An evaluation of the dynamic amplification due to track irregularities for freight transport

   Master-uppsats, KTH/Bro- och stålbyggnad

   Författare :Rasmus Elm Dahlman; Emil Lundberg; [2021]
   Nyckelord :Dynamics; dynamic amplification factor; railway bridge; train-track-bridge interaction; vehicle model; track irregularities; PSD; Dynamisk förstoringsfaktor; dynamik; järnvägsbroar; tåg-spår-bro interaktion; fordonsmodell; spårojämnheter; PSD;

   Sammanfattning : In this thesis a train-track-bridge interaction (TTBI) model is developed in order to study the dynamic amplification from track irregularities on railway bridges traversed by freight trains. These simulations are of great importance since rail freight transport is expected to increase in order to meet the climate goals. LÄS MER

7. 5. Assessment of optimal suspension systems with regards to ride under different road profiles

   Master-uppsats, KTH/Fordonsdynamik

   Författare :Adithya Murali; Pratik Hindraj Vaje; [2021]
   Nyckelord :Ride comfort; Handling; Road profiles; ADAMS; Shaping filter method; Sinusoidal approximation method; Coherence; ISO 8608; Acceleration PSD s; Genetic Algorithm optimisation; ISO 2631.; åkkomfort; Kurvkörningsegenskaper; Vägprofiler; ADAMS; Formningsfiltermetod; Sinusformad approximationsmetod; Koherens; ISO 8608; Acceleration PSDs; Genetisk algoritmoptimering.;

   Sammanfattning : Passenger ride vibration comfort is a critical aspect to consider while developing any vehicle and there is a need to understand how the occupants would be affected when driving on different road profile roughness. Hence, road profile generation is critical as road profiles are used as inputs to simulation tools to investigate vehicle dynamic behaviour in depth. LÄS MER