Sökning: "Björn Löfgren"

Hittade 2 avhandlingar innehållade orden Björn Löfgren.

  1. 1. Kinematic control of redundant knuckle booms

    Detta är en avhandling från Stockholm : Maskinkonstruktion

    Författare :Björn Löfgren; KTH.; [2004]
    Nyckelord :manipulator; kinematic control. Redundant;

    Sammanfattning : A kinematically redundant four degrees of freedommanipulator arm, a knuckle boom, is studied. Three joints arerevolute and one linear. Since only three degrees of freedomare needed for positioning, we have one redundant degree offreedom. Three different kinematic control strategies arestudied. LÄS MER

  2. 2. Kinematic Control of Redundant Knuckle Booms with Automatic Path Following Functions

    Detta är en avhandling från Stockholm : KTH

    Författare :Björn Löfgren; KTH.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydraulic manipulator; redundancy; kinematic control; local optimization; knuckle boom; forest machine; forwarder; boom tip control; joystick control; simulations; path following; TECHNOLOGY Engineering mechanics Construction engineering; TEKNIKVETENSKAP Teknisk mekanik Konstruktionsteknik;

    Sammanfattning : To stay competitive internationally, the Swedish forestry sector must increase its productivity by 2 to 3% annually. There are a variety of ways in which productivity can be increased. One option is to develop remote-controlled or unmanned machines, thus reducing the need for operator intervention. LÄS MER