*AtPointJointPair()

Creates an at-point joint pair.

Syntax

*AtPointJointPair(joint_name, "joint_label", body_1, body_2, origin, Optional: ALLOW_COMPLIANCE)

Arguments

joint_name: The variable name of the at-point joint pair.; Data type: varname
joint_label: The descriptive label of the at-point joint pair.; Data type: label
body_1: The first body or body pair constrained by the at-point joint pair.; Data type: Body or BodyPair
body_2: The second body or body pair constrained by the at-point joint pair.; Data type: Body or BodyPair
origin: The location(s) of the at-point body_1 joint pair.; Data type: Point or PointPair
ALLOW_COMPLIANCE: An optional argument that indicates the joint pair can be made compliant.

Example

*BodyPair(b_kn, "Knuckle", p_kn_cm)
*BodyPair(b_lca, "LCA", p_lca_cm)
*PointPair(p_lbj, "Lower Ball Joint")
*AtPointJointPair(lbj, "Lower Ball", b_kn,  b_lca, p_lbj, ALLOW_COMPLIANCE)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Properties

Property	Returns Data Type	Description
b1	BodyPair	The first body pair constrained by the at-point joint pair.
b2v	BodyPair	The second body pair constrained by the at-point joint pair.
i	MarkerPair	The marker pair on b1.
isbush	boolean	See Comments.
j	MarkerPair	The marker pair on b2.
l	AtPointJoint	The left at-point joint.
label	string	The descriptive label of the at-point joint pair.
r	AtPointJoint	The right at-point joint.
state	boolean	Control state (TRUE or FALSE).
varname	string	The variable name of the at-point joint pair.

Comments

*AtPointJointPair() is used to join two bodies or body pairs at a specific point.

The individual joints of an *AtPointJointPair() can be referred to as joint_name.l (left at-point joint) and joint_name.r (right at-point joint).The ALLOW_COMPLIANCE argument is optional. When it is included, it indicates that the joint pair can be made compliant. In compliant mode, such a joint pair acts as a bushing pair.

The isbush property is valid only for joint pairs that can be made compliant. When isbush is set to FALSE, the joint pair acts like kinematic joints (in a noncompliant mode). When isbush is set to TRUE, the joint pair acts like a bushing pair (in a compliant mode).

When the compliant option in a system is switched to "non-compliant", all the joint pairs in the system act as kinematic joints. However, when the system option is switched to "compliant", only the joint pairs that are created with an ALLOW_COMPLIANCE flag act as bushing pairs. The rest of the joint pairs continue to behave as kinematic joints.