S-Function Design Examples in Simulink

This document presents practical S-function design examples in Simulink, designed to facilitate learning and implementation of custom system components. The examples demonstrate how to create S-functions using MATLAB code, C/C++ MEX files, or Level-2 MATLAB S-functions to implement specific algorithms and control logic. Key implementation aspects include proper handling of initialization routines, continuous/discrete state updates, output calculations, and termination conditions. Through detailed code walkthroughs and step-by-step instructions, you'll learn to structure S-functions with appropriate callback methods (mdlInitializeSizes, mdlDerivatives, mdlOutputs) and parameter handling mechanisms. This documentation will enhance your understanding of S-function architecture, enabling you to develop custom blocks for complex simulations and improve your Simulink modeling capabilities. The examples include real-world applications with code explanations covering algorithm implementation, memory management, and simulation performance optimization.