Sökning: "Noise Vibration Harshness NVH"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Noise Vibration Harshness NVH.

1. 1. NVH analysis and optimization of electric powertrain

   Master-uppsats, KTH/Maskinkonstruktion (Inst.)

   Författare :Anujit Dafle; [2022]
   Nyckelord :Electric powertrain; Gear whine; Noise Vibration Harshness NVH ; Elektrisk drivlina; kuggvin; buller och vibrationer;

   Sammanfattning : With increasing focus on electromobility many companies are developing vehicles powered by an electric energy source. Previously, engines used to be the most prominent source of noise in a traditional Internal Combustion Engine (ICE) vehicle. LÄS MER

3. 2. 3D Printed Lattice Structure for Driveline Applications

   Master-uppsats, KTH/Materialvetenskap

   Författare :Boyu Xue; [2021]
   Nyckelord :Lattice structure; AM Additive Manufacturing ; topology optimization; lattice optimization; NVH noise; vibration and harshness ; mechanical performance; lightweight; driveline; natural frequency; Gitterstruktur; AM additiv tillverkning ; topologioptimering; optimering av gitter; NVH buller; vibrationer och obehag ; mekanisk prestanda; lättvikt; drivlina; egenfrekvens;

   Sammanfattning : Lattice structures have received a lot of attention as cellular materials in recent years because of their outstanding properties, such as high strength-to-weight ratio, heat transfer, energy absorption, and capability of improving noise, vibration and harshness (NVH) behavior. This type of structure received a boost from additive manufacturing (AM) technology, which can fabricate geometries in practically any shape. LÄS MER

4. 3. Fault detection of planetary gearboxes in BLDC-motors using vibration and acoustic noise analysis

   Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

   Författare :Henrik Ahnesjö; [2020]
   Nyckelord :Planetary gearbox; Fault detection; Condition Monitoring; Support Vector Machine SVM ; Machine Learning; Supervised Machine Learning; Defect Pinion; Defect Planet Gear; MATLAB; LabVIEW; Soundproof-box; Noise Vibration Harshness NVH ; Gearmesh Frequency GMF ; Power Spectrum; BLDC-motor;

   Sammanfattning : This thesis aims to use vibration and acoustic noise analysis to help a production line of a certain motor type to ensure good quality. Noise from the gearbox is sometimes present and the way it is detected is with a human listening to it. This type of error detection is subjective, and it is possible for human error to be present. LÄS MER

5. 4. Drag Torque and Synchronization Modelling in a Dual Clutch Transmission

   Master-uppsats, Lunds universitet/Maskinelement

   Författare :Mikael Lund; [2018]
   Nyckelord :drag torque; synchronization; dual clutch transmission; Technology and Engineering;

   Sammanfattning : Noise, vibration and harshness (NVH) is a big consideration in the automotive industry. In order to create an as pleasant driving experience as possible for the driver, NVH should be minimized. One of the sources of NVH comes from the transmission due to the synchronization process. LÄS MER

7. 5. Conceptual Dynamic Analysis of a Vehicle Body

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

   Författare :Björn Pedersen; [2018]
   Nyckelord :Technology and Engineering;

   Sammanfattning : The noise, vibration and harshness (NVH) and body dynamic performance of automotive vehicles is highly dependent of the components included in the body structure and compartment, since they add mass, stiffness and damping to the overall structure. Today, the noise levels in the compartment are predicted using complex and detailed computational models during both early and late stages of the vehicle development process. LÄS MER