AoR Estimation Algorithm (Normalization Method)

Implementation of the algorithm for dominant axis estimation described by [Chang 2007].

Attributes

Attribute Default Description Required 
name
 name of the element Yes
 
coordinateSystem
 Yes 
SignAxis

 axis for defining the sign of the estimated axis. The sign of the estimated axis is determined so that the axis given with this attribut inclose an angle less than 90 Degrees.
(not used, use the attribute FirstEstimation instead)		 No 
ReferencePoint
 The point given as formula by this attribut is used to calculate an origin of the estimated axis by projection of this point to the estimated axis - given in laboratory system coordinates No 
firstEstimation
 Parameter with axis as first estimation in coordinates of the system defined by the attribute coordinateSystem Yes 
origin
 Parameter with one point on the axis corresponding to the radius attribute in coordinates of the system defined by the attribute coordinateSystem Yes 
radius
 Parameter with the radius for a given point on the axis corresponding to the orign attribute. Yes 
condition

 if set to a mathematical formula which  is 1 or 0 it is used instead of defined events
(better use phase attribute instead)		 No 
phase
 phase which defines the frames to use for optimization No 
maxIterations
 100 maximal iteration steps - fix integer value - no formula
(vielleicht wäre eine Formel doch universeller?)		 No 
tolerance
 1.0 convergence criteria - fix double value - no formula
(vielleicht wäre eine Formel doch universeller?)		 No

Generated Variables

variable name type description model parameter trial parameter trajectorie availability 
<name>Origin
 Vector3d X process phase after calibration 
<name>Axis
 Vector3d X process phase after calibration 
<name>Condition
 double with values 0 or 1 X 
<name>FramesCount
 double X after calibration (not for trials of the calibration group) 
<name>Radius
 double X after calibration (not for trials of the calibration group) 
<name>RadiusStd
 double X after calibration (not for trials of the calibration group) 
<name>OriginLocal
 Vector3d X after calibration (not for trials of the calibration group) 
<name>PlaneDistStd
 double X after calibration (not for trials of the calibration group) 
<name>MeanPlaneDist
 double mean distance of the marker frames to the plane defined by estimated axis and origin. X after calibration (not for trials of the calibration group) 
<name>AxisLocal
 Vector3d after calibration (for trials of the calibration group)

Examples

<Phase name="RFlex" 
 process="post"
 calibrateIncludes="dynamic_calibrate_right_ellbow"
 includes="dummy">abs(90.0-RFlexSimpleAngle) &lt; 30.0</Phase>

<CoRChang2006A name="REJCChang"
 phase="RFlex"
 coordinateSystem="RElbow"
 balancing="true"
 calibrateIncludes="dynamic_calibrate_right_ellbow"
 excludes="static_calibrate,static_calibrate_shoulder,dynamic_calibrate_right_ellbow,dynamic_calibrate_left_ellbow">(RHUMS+RHUMS)/2.0</CoRChang2006A> 

<AoRChang2007 name="RElbowChang2007Hinge"
 coordinateSystem="RElbow"
 ReferencePoint="RELB"
 firstEstimation="RElbowHingeAxisLocal"
 Origin="REJCChangOriginLocal"
 Radius="REJCChangRadius"
 calibrateIncludes="dynamic_calibrate_right_ellbow"
 excludes="static_calibrate,static_calibrate_shoulder,dynamic_calibrate_right_ellbow,dynamic_calibrate_left_ellbow">(RHUMS+RHUMS)/2.0</AoRChang2007>