Block Properties in Simulink

What Are Block Properties?

In Simulink, every block has properties that control how it works in the model. You can change these properties using MATLAB scripts, which helps in automation, tuning and model setup.

Examples of block properties:

  • Parameter values like Gain = 5
  • Data type and signal size
  • Sample time or how often it runs
  • Execution order or priority
  • Notes or documentation
  • Block name, type, position, and direction
  • Commented status, whether the block is active or disabled

Accessing Block Properties via Scripting

We use get_param() and set_param() functions.

% Get a parameter
val = get_param('model/Gain', 'Gain');
% Set a parameter
set_param('model/Gain', 'Gain', '10');

Common Block Properties

Example – Automating Model Parameter Updates

model = 'engine_model';
load_system(model);
set_param([model '/Throttle'], 'Gain', '2.5');
save_system(model);

Workspaces in MATLAB

What Is a Workspace?

A workspace is a memory space where MATLAB keeps variables. Simulink can use different workspaces, such as for models, masked subsystems, and the base MATLAB workspace.

Types of Workspaces

Using Workspaces in Practice

Assigning Variables to Base Workspace

assignin('base', 'speed_limit', 100);

Evaluating Expression in Another Workspace

val = evalin('base', 'speed_limit + 20');

Accessing Model Workspace

ws = get_param('my_model', 'ModelWorkspace');
ws.assignin('gain_factor', 5.5);

Automotive Use Cases