Interface (AB-Rotational)

R2026b

Connect angle-based and non-angle-based mechanical rotational ports

Since R2026a

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  • Interface (AB-Rotational) block

Libraries:
Simscape / Foundation Library / Rotational / Utilities

Description

The Interface (AB-Rotational) block represents a rigid connection between an angle-based and a non-angle-based mechanical rotational network. Port angular velocities are equal. Torques at the interface are equal and opposite.

The Angle-based port parameter value determines the block orientation. Align the block positive direction with the positive direction of the connected angle-based network.

The block logs the variable t:

  • If Angle-based port is Bab, t represents the torque of the angle-based rotational network at port Bab acting on the non-angle-based rotational network at port F.

  • If Angle-based port is Fab, t represents the torque of the non-angle-based rotational network at port B acting on the angle-based rotational network at port Fab.

For more information, see Data Logging.

Examples

Interfacing Angle-Based Rotational and Position-Based Translational Networks

Interfacing Angle-Based Rotational and Position-Based Translational Networks

Demonstrates how you can define positive directions for translation and rotation in your physical view and adjust the Simscape™ network to achieve the desired behavior. It highlights the flexibility of Simscape in mapping physical directions to schematic representations.

Ports

Conserving

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Angle-based rotational conserving port that represents a passage point through the interface. Connect this port to an angle-based rotational port of another block.

Dependencies

To enable this port, set the Angle-based port parameter to Bab.

Programmatic Use

Port: Bab

Angle-based rotational conserving port that represents a passage point through the interface. Connect this port to an angle-based rotational port of another block.

Dependencies

To enable this port, set the Angle-based port parameter to Fab.

Programmatic Use

Port: Fab

Mechanical rotational conserving port that represents a passage point through the interface. Connect this port to a regular, non-angle-based, mechanical rotational port of another block.

Dependencies

To enable this port, set the Angle-based port parameter to Bab.

Programmatic Use

Port: F

Mechanical rotational conserving port that represents a passage point through the interface. Connect this port to a regular, non-angle-based, mechanical rotational port of another block.

Dependencies

To enable this port, set the Angle-based port parameter to Fab.

Programmatic Use

Port: B

Parameters

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Specify the block orientation:

  • Bab — Exposes the angle-based port Bab, located on the left side of the block icon in the default orientation, and the mechanical rotational port F on the right side. The block positive direction is from port Bab to port F.

  • Fab — Exposes the angle-based port Fab, located on the right side of the block icon in the default orientation, and the mechanical rotational port B on the left side. The block positive direction is from port B to port Fab.

Programmatic Use

Parameter: angle_based_port
Values: "foundation.enum.RotationalInterfacePort.Bab" | "foundation.enum.RotationalInterfacePort.Fab"

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"fl_lib/Rotational/Utilities/Interface (AB-Rotational)"

Example: add_block("fl_lib/Rotational/Utilities/Interface (AB-Rotational)","myModel/myBlock",MakeNameUnique="on")

For information about programmatic access to individual block parameters, see the Programmatic Use section of parameter descriptions on this page.

Extended Capabilities

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C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2026a

See Also