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Angle Constraint

Kinematic constraint for fixing angle between two frame Z axes

Library

Constraints

Description

This block represents a kinematic constraint for fixing the angle between two frame Z axes. The two constrained frames, base and follower, lose one rotational degree of freedom with respect to each other. The distance between the two frame origins is not affected. Other kinematic constraints, such as those due to joints and model topology, typically remove additional degrees of freedom between the two frames.

The figure shows the constraint angle between two frame Z axes. The frames can translate with respect to each other if at least one translational degree of freedom exists between the two.

Dialog Box and Parameters

Type

Angle constraint type. The default setting is General.

TypePurpose
ParallelAlign base and follower frame +Z axes.
Anti-ParallelAlign the base frame +Z axis with the follower frame -Z axis.
PerpendicularMake base and follower frame Z axes mutually orthogonal.
GeneralMaintain base and follower frame Z axes at the specified angle. By definition, angles must fall in the range 0–180°.

Ports

The block contains frame ports B and F, representing base and follower frames, respectively.

See Also

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