Sökning: "Helena Olofson"

Hittade 2 uppsatser innehållade orden Helena Olofson.

  1. 1. Rolling resistance during cornering - Impact of lateral forces for heavy-duty vehicles

    Master-uppsats, KTH/Optimeringslära och systemteori

    Författare :Helena Olofson; [2015]
    Nyckelord :Bicycle model; lateral forces; rolling resistance; velocity optimization; Cykelmodell; sidokrafter; rullmotstånd; hastighetsoptimering; bränsleförbrukning;

    Sammanfattning : We consider first the single-track bicycle model and state relations between the tires’ lateral forces and the turning radius. From the tire model, a relation between the lateral forces and slip angles is obtained. The extra rolling resistance forces from cornering are by linear approximation obtained as a function of the slip angles. LÄS MER

  3. 2. Restoration of clipped sound signals -a weighted Fourier series and AR approach

    Kandidat-uppsats, KTH/Optimeringslära och systemteori

    Författare :Anders Gidmark; Helena Olofson; [2013]
    Nyckelord :;

    Sammanfattning : Sound signals can be distorted in many dierent ways, one of them is called clipping. A clipped sound signal diers from a non-clipped signal in the way that the amplitudes of the sound wave that are higher than a certain amplitude threshold has been partially lowered or completely lowered to the threshold, the latter is called hard clipping. LÄS MER