SIMULINK s-function的设计（Design of SIMULINK s-function）.doc

SIMULINK s-function的设计（Design of SIMULINK s-function） Design of SIMULINK s-function Simulink provides users with a number of built-in basic library modules that make up the systems model through these modules. The combination and encapsulation of the modules that are often used can build new modules that can be reused, but it is still based on the built-in modules that Simulink originally provided. Simulink s-function is a powerful new tool to extend the module library. The concept of s-function S - the function is a dynamic system of computer language, in MATLAB, the user can choose written in m file, can also be written in c or tex-mex files, only here to introduce how to use m documentation s - function. S-function provides a powerful tool for extending the Simulink module library, which USES a specific invocation syntax to enable functions to interact with the Simulink solver. The most widely used function of s-function is to customize the users own Simulink module. It is very versatile and can support continuous systems, discrete systems, and hybrid systems. Second, create m file s-function 1. Use template file: sfuntmp1.m This template file is located under the toolbox/simulink/blocks directory under the MATLAB root directory. The s-function structure in the template file is very simple, and it only specifies the m file subfunction that is to be invoked for the value of the different flag. For example, when flag = 3, when the module is in the simulation phase of the calculation output, the corresponding function of the corresponding call is sys = mdloutputs (t, x, u). The template file USES the switch statement to complete this designation, but this structure is not unique, and users can use the if statement to perform the same function. And in practice, some values can be removed according to actual needs, because not every module needs to pass all of the child function calls. Template file just Simulink for the convenience of users and provide a reference