Adams Basic Package > Adams View > View Function Builder > Run-Time Functions > Functions: A - M > B313 Sequence: 3rd Rotation (PHI)

B313 Sequence: 3rd Rotation (PHI)

Returns the third angle of rotation (in radians) associated with a Body 313 rotation sequence from one coordinate system marker to another. This third rotation is referred to as the phi, , angle, and is used in association with the psi, , (1st rotation) and theta, , (2nd rotation) angles.
Positive angular displacement is determined by the right-hand rule.

Format

PHI (To Marker, From Marker)

Arguments

 
To Marker
(Required) The coordinate system marker whose rotation is being measured.
From Marker
(Optional) The coordinate system marker with respect to which the rotation is being measured. If not specified, this argument defaults to the global coordinate system.

Example

The following example illustrates the use of the PHI function:
PHI(marker_T, marker_F)
See the illustration for B313 Sequence: 1st Rotation (PSI).
Learn more about displacement functions.