TXYZ
The TXYZ measure returns the net translational torque vector acting on marker i, represented in the coordinate system of marker k. All force and constraint elements acting between markers i and j are included in the calculation of the torque. If j is not specified, TXYZ measures the sum of all force and constraint elements acting on marker i. If k is not specified or if k=0, the torque is represented in the GROUND coordinate system. To specify k without specifying j, use j=0.
Format
TXYZ(i[,j][,k])
Arguments
i | An integer that specifies the identifier of the marker at which the magnitude of the net torque is to be calculated. |
j | A second integer that specifies a marker identifier. All forces acting between the [i,j] pair are to be included in the calculation. Set j = 0 or do not specify if you are interested in all forces acting on marker i. |
k | An integer that specifies the identifier of a marker (coordinate system) in which the x-component of the torque is to be returned. k defaults to the global coordinate system when it is not specified. |
Extended Definition
Mathematically, TXYZ is calculated as:
where:
■TX is the TX measure.
■TY is the TY measure.
■TZ is the TZ measure.
Examples
The total torque on marker 5, resolved on the x-axis of marker 4.
VARIABLE/1, FUN=TXYZ(5)*UVX(4)
which is alternatively available as TX(5,0,4).
See other Vector measures available.