Search for dissertations about: "Björn Löfgren"

Found 2 swedish dissertations containing the words Björn Löfgren.

2. 1. Kinematic control of redundant knuckle booms

   Author : Björn Löfgren; KTH; []
   Keywords : manipulator; kinematic control. Redundant;

   Abstract : 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. READ MORE

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

   Author : Björn Löfgren; Jan Wikander; Arto Finland Helsinki University of Technology Visala; KTH; []
   Keywords : 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; Construction engineering; Konstruktionsteknik;

   Abstract : 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. READ MORE