PS Sign

R2026b

Output sign of input physical signal

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PS Sign block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simscape / Foundation Library / Physical Signals / Nonlinear Operators

Description

The PS Sign block returns the sign of the input physical signal:

• The output is 1 when the input is greater than zero.

• The output is 0 when the input is equal to zero.

• The output is –1 when the input is less than zero.

Both the input and the output are physical signals. Untyped physical ports facilitate the signal size propagation. The output signal is always unitless.

Ports

Input

I — Input physical signal, untyped

physical signal

Input physical signal.

The port name is not visible in the block icon, but you can see this name in the underlying source file by clicking the Source code link in the Description tab of the block dialog box.

Programmatic Use

Port: I

Output

O — Output physical signal, untyped

physical signal

Output physical signal. The signal size is the same as the size of the input signal, but the unit is always 1 (unitless).

The port name is not visible in the block icon, but you can see this name in the underlying source file by clicking the Source code link in the Description tab of the block dialog box.

Programmatic Use

Port: O

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/Physical Signals/Nonlinear Operators/PS Sign"

Example: add_block("fl_lib/Physical Signals/Nonlinear Operators/PS Sign","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

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

Version History

Introduced in R2007b

R2019a: Unit Propagation

Prior to R2019a, this block did not propagate physical units.

If your model contains legacy blocks without unit propagation, use the Upgrade Advisor to upgrade your blocks to the latest version. For more information, see Upgrading Models with Legacy Physical Signal Blocks.