Sökning: "Experimental damping estimation"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden Experimental damping estimation.

1. 1. On experimental material damping estimation based on vibration response models and hybride modal analysis

   Författare :Mats Dalenbring; KTH; []
   Nyckelord :Constitutive isotropic material modelling; Augmented Hooke s law; Experimental damping estimation; Finite element displacement modes; Hybrid modal analysis; Experimental modal analysis; Structural vibration modelling;

   Sammanfattning : .... LÄS MER

3. 2. On modally distributed damping in heavy vehicles

   Författare :Peter Holen; Annika Stensson Trigell; Zbigniew Lozia; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; damping; modal damping; chassis suspension; heavy vehicle; attachment compliance; Physics; Fysik;

   Sammanfattning : This thesis investigates passive damping system performance in heavy vehicles through analytical expressions, simulations with different vehicle models as well as through experimental evaluation in a tractor semi trailer combination. The objective is to study what levels of chassis suspension damping that are desirable for different vehicle modes and how this may be achieved with passive damping systems. LÄS MER

4. 3. Towards semi-automation of forestry cranes : automated trajectory planning and active vibration damping

   Författare :Szabolcs Fodor; Leonid Freidovich; Carlos Vázquez; Anton Shiriaev; Torben Ole Andersen; Umeå universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forestry; forwarder cranes; semi-automation; slewing actuator; automated trajectory planning; oscillations; inner boom actuator; active vibration damping; frequency estimation; input shaping control technique; H2-optimal control;

   Sammanfattning : Forests represent one of the biggest terrestrial ecosystems of Earth, that can produce important raw renewable materials such as wood with the help of sun, air and water. To efficiently extract these raw materials, the tree harvesting process is highly mechanized in developed countries, meaning that advanced forestry machines are continuously used to fell, to process and to transport the logs and biomass obtained from the forests. LÄS MER

5. 4. Simulation and Experimental Methods for Characterization of Nonlinear Mechanical Systems

   Författare :Martin Magnevall; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear structural dynamics; simulation; system characterization; experimental techniques; experimental methods;

   Sammanfattning : Trial and error and the use of highly time-consuming methods are often necessary for investigation and characterization of nonlinear systems. However, for the rather common case where a nonlinear system has linear relations between many of its degrees of freedom there are opportunities for more efficient approaches. LÄS MER

7. 5. Methods for experimental estimation of anelastic material properties

   Författare :Mats Dalenbring; KTH; []
   Nyckelord :constitutive material damping modelling; isotropy; transverse isotropy; homogeneous materials;

   Sammanfattning : .... LÄS MER