*OrientJointPair()

Creates an orient joint pair.

Syntax

*OrientJointPair(joint_name,"joint_label",body_1, body_2, origin_1, origin_2)

Arguments

joint_name: The variable name of the orient joint pair.; Data type: varname
joint_label: The descriptive label of the orient joint pair.; Data type: label
body_1: The first body or body pair constrained by the orient joint pair.; Data type: Body or BodyPair
body_2: The second body or body pair constrained by the orient joint pair.; Data type: Body or BodyPair
origin_1: The location(s) of marker pair i attached to body_1.; Data type: Point or PointPair
origin_2: The location(s) of marker pair j attached to body_2.; Data type: Point or PointPair

Example

*BodyPair(body_1, "First body", p_1)
*BodyPair(body_2, "Second body", p_2)
*PointPair(point_1, "First point")
*PointPair(point_2, "Second point")
*OrientJointPair(jt1, "Orientation joint", body_1, 
 body_2, 
 point_1, 
 point_2)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Properties

Table 1.
Property	Returns Data Type	Description
b1	BodyPair	The first body pair constrained by the orient joint pair.
b2	BodyPair	The second body pair constrained by the orient joint pair.
i	MarkerPair	The marker pair on b1.
j	MarkerPair	The marker pair on b2.
l	OrientJoint	Left orient joint.
label	string	The descriptive label of the orient joint pair.
r	OrientJoint	Right orient joint.
state	boolean	Control state (TRUE or FALSE).
varname	string	The variable name of the orient joint pair.

Comments

The individual joints of an *OrientJointPair() can be referred to as joint_name.l (left orient joint) and joint_name.r (right orient joint).

An orient joint constrains all three relative rotations between the two bodies. The relative translations, however, are unconstrained.