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Real-Time Simulation

Real-time target; normal, accelerator, and external modes; sample rate; real-time scope parameters

To evaluate the real-time behavior of your model, run the model, log data, tune parameters, and view signals from the Simulink^® toolbar. Capture signals from the model and display them with standard Simulink Scope blocks. Run your model in normal, accelerator, or external mode, depending upon the sample rate that you require.

If you require a moderate sample rate, up to 1 kHz, use normal or accelerator mode. In these modes, you run the Simulink model within MATLAB^®. Only the I/O module drivers run in the Simulink Desktop Real-Time™ kernel.

If you require a higher sample rate, up to 20 kHz, use external mode. In external mode, you use Simulink Coder™ to generate a real-time application from the model. The real-time application and the I/O module drivers run in the Simulink Desktop Real-Time kernel.

Functions

rtwho Display information about development computer status

Topics

Prerequisites

Configure a Model

Configure a Simulink model to run as a real-time application.

Normal Mode

Real-Time Execution in Normal Mode

Learn about the behavior of Simulink Desktop Real-Time in Simulink normal mode.

Simulate Model in Real-Time Normal Mode

Accelerator Mode

Real-Time Execution in Accelerator Mode

Learn about the behavior of Simulink Desktop Real-Time in Simulink accelerator mode.

Simulate Model in Real-Time Accelerator Mode

External Mode

Real-Time Execution in External Mode

Learn about the behavior of Simulink Desktop Real-Time in Simulink external mode.

STEP 1: Set External Mode Code Generation Parameters
STEP 2: Prepare External Mode Application
STEP 3: Set External Mode Scope Parameters
STEP 4: Execute Real-Time Application in External Mode

Display

Inspect Simulink® Desktop Real-Time™ Signals with Simulation Data Inspector

Trace signals by using SDI in Simulink external mode.

Water Tank Model with Dashboard

This example shows a real-time model of a water tank controlled by dashboard controls.

Related Information

Create a Simulink Model

Run Application from MATLAB Command Line

Featured Examples

Water Tank Model with Dashboard

A real-time model of a water tank controlled by dashboard controls. You can change the inputs to the plant using the knobs and observe the response on the gauges.

Open Example

Inspect Simulink® Desktop Real-Time™ Signals with Simulation Data Inspector

Trace signals by using SDI in Simulink external mode.

Open Example

Real-Time Signal Generator

Produce an analog output signal using Simulink Desktop Real-Time™. Because analog output typically requires less configuration and is easier to connect than analog input, this model is a good start to your experiments with data acquisition boards. You can verify the presence of the generated signal e.g. by connecting an oscilloscope to the analog output pins of your data acquisition board.

Open Example

Real-Time Controller

Build a simple closed-loop real-time controller using Simulink Desktop Real-Time™. The output of the controlled plant is connected to the analog input of your data acquisition board. This signal is subtracted from the set point value generated by the signal generator and processed by a PID controller. The output of the controller drives the input of the plant using the analog output of your data acquisition board.

Open Example

Real-Time Filter

A real-time filter built using DSP System Toolbox™ and Simulink Desktop Real-Time™. The unfiltered signal is acquired by the analog input, passed through a filter designed by DSP System Toolbox and finally sent to analog output. Both the unfiltered and filtered signals are shown in real-time using the Scope block.

Open Example