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Implement Blocks with System Objects

Use a System object™ in Simulink® using MATLAB System blocks

MATLAB System block uses System object to implement MATLAB® algorithms in Simulink. Before you begin using a MATLAB System block, you must have a System object to associate with a block. A System object is a special kind of MATLAB class and they are designed specifically for the implementation and simulation of dynamic systems.

Blocks

MATLAB SystemInclude System object in model

Examples and How To

Implement a MATLAB System Block

Implement a block and assign a System object to it.

Change Blocks Implemented with System Objects

Implement a block with another System object.

Specify Sample Time for MATLAB System Block

The sample time of a block is a parameter that indicates when the block produces an output, and eventually updates its internal state.

Call Simulink Functions from MATLAB System Block

Learn to call a Simulink function from a MATLAB System block.

Change Block Icon and Port Labels

Change the icon appearance of your block.

Add and Implement Propagation Methods

To define output specifications, use propagation methods.

Use System Objects in Feedback Loops

Process nondirect feedthrough data through the System object.

Share Data with Other Blocks

Share data between MATLAB System and other blocks using the global keyword and the Data Store Memory block or Simulink.Signal object.

Call Python Function Using MATLAB Function and MATLAB System Block

This example shows how to call a Python® function in Simulink® that sorts random numbers using a Python® sorting function and two different blocks: the MATLAB Function block and MATLAB System block.

Concepts

MATLAB System Block

Implement your own algorithms using System objects.

Mapping System Object Code to MATLAB System Block Dialog Box

The System object source code controls the appearance of the block dialog box.

Simulation Modes

You can use MATLAB System block in Simulink models for simulation via interpreted execution or code generation.

Simulink Engine Interaction with System Object Methods

Follow a process view of the order in which the MATLAB System block invokes System object methods within the context of the Simulink engine.

Nonvirtual Buses and MATLAB System Block

Use nonvirtual buses as input and output signals.

Share Data with Other Blocks

Share data between MATLAB System and other blocks using the global keyword and the Data Store Memory block or Simulink.Signal object.

Considerations for Using System Objects in Simulink

Consider these guidelines when working with variable-size signals, tunable parameters, and For Each subsystems.

Model Moving Target Visualization by Converting MATLAB Code to Simulink Behavior

This topic shows how to convert MATLAB code to a Simulink model.

Troubleshooting

Troubleshoot System Objects in Simulink

Use these guidelines to troubleshoot System objects in Simulink.

Related Information

Featured Examples

Implement a Simple Algorithm

Implement a Simple Algorithm

Use a simple System object in Simulink with the MATLAB System block.

Open Model
Customize MATLAB System Block Dialog

Customize MATLAB System Block Dialog

Customize the block dialog for a MATLAB System block.

Open Model
Break Algebraic Loops

Break Algebraic Loops

Create a MATLAB System block that can break an algebraic loop in the model.

Open Model
Customize MATLAB System Block Appearance

Customize MATLAB System Block Appearance

Customize the appearance of the MATLAB System block.

Open Model
Specify Output Characteristics of MATLAB System Block

Specify Output Characteristics of MATLAB System Block

Specify output size, data type and complexity of a MATLAB System block.

Open Model

Simulink Documentation

Support

Model-Based Design for Embedded Control Systems

Model-Based Design for Embedded Control Systems

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