Simulink 函数

创建可在 Simulink 模型中访问的函数

Simulink^® 函数是一种计算单元，为它提供一组输入之后，它会计算出一组输出。由于 Simulink 函数为其函数定义和函数调用方提供了一个通用的文本接口，因此您可以选择如何定义函数。可能的函数定义包括使用：

Simulink Function 模块中的 Simulink 模块
导出的 Stateflow^® 图形函数中的 Stateflow 状态转移
导出的 Stateflow MATLAB 函数中的 MATLAB^® 代码语句

定义函数后，可以使用 Function Caller 模块、MATLAB Function 模块或 Stateflow 图来调用该函数。

模块

函数

Simulink Function	用 Simulink 模块以图形方式定义函数
Chart	用有限状态机实现控制逻辑

函数调用方

Function Caller	调用 Simulink 或导出的 Stateflow 函数
MATLAB Function	将 MATLAB 代码包含在生成可嵌入式 C 代码的模型中
Chart	用有限状态机实现控制逻辑

局部环境信号

Inport	为子系统或外部输入创建输入端口
Outport	为子系统或外部输出创建输出端口
Function Element	Specify function to be called via exporting function port （自 R2022a 起）
Function Element Call	Specify function call to be issued via invoking function port （自 R2022a 起）

主题

Simulink Functions Overview
Functions in a Simulink model that share a common text interface with function callers.
向模型添加 Simulink 函数
使用 Simulink Function 模块或从 Stateflow 图导出的图形或 MATLAB 函数定义一个 Simulink 函数。
Call a Simulink Function from a Model
Call a Simulink function from a Simulink model using a Function Caller block, a MATLAB Function block, or a Stateflow chart.
Simulink Function Blocks in Referenced Models
Add and access functions in model components.
Model Client-Server Communication Using Function Ports
Use function ports to model client and server components in a distributed service architecture.
Scoped, Global, and Port-Scoped Simulink Function Blocks Overview
Specify visibility and access of Simulink Function blocks.
Scoped Simulink Function Blocks in Subsystems
Limit the scope of a function to a subsystem.
Scoped Simulink Function Blocks in Models
Limit the scope of a function to a model.
Define Diagnostic Services Using Simulink Functions
Create a diagnostic service with functions where callers pass an error code.
Service-Oriented Sensor Modeling (System Composer)
Use a service interface to call services from multiple instances of a referenced component.

精选示例

Monitoring Ink Status on a Shared Printer Using Simulink Functions

How clients, in this case three computers, can send jobs to a server, a printer, and receive status from that server. This example highlights how Simulink functions can be called from different subsystems and interact in both Simulink® and Stateflow®. (Note that when you simulate the example, Stateflow might generate code in the current working folder.)

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Model Reusable Components Using Multiply Instanced Simulink Functions

In this example, the model slexCounterFunctionMdlRef contains the Simulink® function update, which maintains a counter. Multiple instancing provides the ability to reuse this logic as CounterA and CounterB in this example model.

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Dynamic Priority Scheduling of Functions

A common modeling pattern to dynamically schedule the execution of functions using a Stateflow® chart.

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Temperature Control System Communicating with Messages

Distributed control of room temperatures by processing messages from room thermostats and communicating control commands using messages to different receivers.

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