Example 724: Parameter estimation by minimising sums of squares of data errors

This example estimates a neo-hookian parameter by minimising the error between tracked data points and points predicted using finite elasticity.

The comfile run by this example is as follows:

#Example_724  

if ($OPTIMISE != 1) {
	fem define coordinate;r;uniaxial;example 
	fem define node;r;;example
	fem define base;r;;example
	fem define element;r;;example 
	fem define fibre;d
	fem define element;r;;example fibre
	fem define equation;r;;example
	fem define material;r;;example
	fem define initial;r;;example
	fem define solve;r;;example

	# this loads in the undeformed data,
	# and generate the measured data.
	fem define data;r;;example
	fem define xi;c contain
	fem solve step 1 error 1.0D-10
	fem define data;c from_xi def

	fem define optimise;r;;example

	$OPTIMISE = 1;
	optimise;
} else {
	fem solve incr 0.0 error 1.0D-10
	fem evaluate resid wrt data_fitting function deformed
}

Additional testing commands:

fem list stress;

Files used by this example are:

Name                 Modified     Size

example_724.com      17-Aug-2014  701 
test_output.com      17-Aug-2014   17 
uniaxial.ipbase      19-Apr-2004  3.4k
uniaxial.ipcoor      19-Apr-2004  610 
uniaxial.ipdata      19-Apr-2004  507 
uniaxial.ipelem      19-Apr-2004  446 
uniaxial.ipelfb      19-Apr-2004  275 
uniaxial.ipequa      02-May-2004  2.1k
uniaxial.ipinit      19-Apr-2004  1.5k
uniaxial.ipmate      19-Apr-2004  2.3k
uniaxial.ipnode      19-Apr-2004  1.9k
uniaxial.ipopti      24-Jun-2005  1.3k
uniaxial.ipsolv      16-Aug-2010  2.3k
uniaxial.ipsolv.old  13-Apr-2007  2.2k

Download the entire example:

Name                      Modified     Size

examples_7_72_724.tar.gz  18-Aug-2014  7.3k

Testing status by version:

Testing status by file:

• cmiss_test.log
  

  i686-linux
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.
  mips-irix
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.
  Success	cm-debug-clear-malloc:	cmiss_test.log.retain.
  Success	cm-debug-clear-malloc7:	cmiss_test.log.retain.
  Success	cm64:	cmiss_test.log.retain.
  Success	cm64-debug:	cmiss_test.log.retain.
  rs6000-aix
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.
  Success	cm64:	cmiss_test.log.retain.
  Success	cm64-debug:	cmiss_test.log.retain.
  x86_64-linux
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.

  
  
• cmiss_test.out
  

  i686-linux
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.
  mips-irix
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.
  Success	cm-debug-clear-malloc:	ndiff test: no significant differences with generic answer.
  Success	cm-debug-clear-malloc7:	ndiff test: no significant differences with generic answer.
  Success	cm64:	ndiff test: no significant differences with generic answer.
  Success	cm64-debug:	ndiff test: no significant differences with generic answer.
  rs6000-aix
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.
  Success	cm64:	ndiff test: no significant differences with generic answer.
  Success	cm64-debug:	ndiff test: no significant differences with generic answer.
  x86_64-linux
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.

  
  

Html last generated: Sun Mar 6 05:50:31 2016

Input last modified: Sun Aug 17 20:33:32 2014