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parallel_flexure_guide_transfer

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parallel_flexure_guide_transfer [2018/05/16 13:43]
marijn.nijenhuis 		parallel_flexure_guide_transfer [2018/05/16 13:50]
marijn.nijenhuis
Line 13: Line 13:
 opt.transfer = {true 0.01};       %Calculation of state-space equations (with relative damping 0.01) opt.transfer = {true 0.01};       %Calculation of state-space equations (with relative damping 0.01)
 </code> </code>
-It has to be noted that the state-space equations can only be computed for an undeformed flexure mechanism. Therefore, no external loads (actuation force) or input displacements are allowed when computing state-space equations. (An error message will appear.) 
  
-The resulting transfer function is plotted in the figure below, with the first eiqenfrequency at approximately 10 rad/s and the first disturbing frequency at 360 rad/s.+Note that 
 +  * the state-space equations can only be computed for an undeformed flexure mechanism. Therefore, no external loads (actuation force) or input displacements are allowed when computing state-space equations. (An error message will appear.) 
 +  * Velocity outputs are supported as well; 
 +  * Relative damping for all modes of the system can be specified optionally by means of the ''opt.transfer'' field. 
 +For details, see the [[full_syntax|SPACAR Light full syntax]].
  
-{{::transfer pfg.png?direct|}}+The resulting transfer function is plotted in the figure below. The first eigenfrequency is approximately 10 rad/s;  the first parasitic eigenfrequency appears at 360 rad/s.
  
 +{{::transfer pfg.png?direct|}}
  
 An example file for providing the input for SPACAR Light and plotting the transfer function is provided below. An example file for providing the input for SPACAR Light and plotting the transfer function is provided below.
Line 66: Line 70:
 eprops(1).dim      = [50e-3 0.2e-3];   %Width: 50 mm, thickness: 0.2 mm eprops(1).dim      = [50e-3 0.2e-3];   %Width: 50 mm, thickness: 0.2 mm
 eprops(1).orien    = [0 0 1];          %Orientation of the cross-section as a vector pointing along "width-direction" eprops(1).orien    = [0 0 1];          %Orientation of the cross-section as a vector pointing along "width-direction"
-eprops(1).nbeams   = 2;                %2 beam elements for simulating these elements +eprops(1).nbeams   = 2;                %2 beam elements for simulating these flexures 
-eprops(1).flex     = 1:6;            %Full flexible beam +eprops(1).flex     = 1:6;              %Fully flexible beam 
-eprops(1).color    = 'grey'; +eprops(1).color    = 'grey';           %Color of elements 
-eprops(1).opacity  = 0.7; +eprops(1).opacity  = 0.7;              %Opacity of elements 
-eprops(1).cw       = true;+eprops(1).cw       = true;             %Enable (approximate) torsional stiffening due to constraint warping 
 %Property set 2 %Property set 2
 eprops(2).elems    = [2 4];            %Add this set of properties to element 2 and 4 eprops(2).elems    = [2 4];            %Add this set of properties to element 2 and 4
parallel_flexure_guide_transfer.txt · Last modified: 2021/05/05 14:17 by marijn.nijenhuis

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