信号

配置和显示信号属性

信号在仿真中的两个模块之间传输数据。数据可以是经模块计算后的输出，或只是一条消息。信号的值是在仿真的所有时间点上计算的。您可以在仿真期间和仿真后显示信号数据和属性，在模块图中查看实时值，或将这些值作为变量记录在工作区中。您还可以将信号导出到文件或工作区以进行进一步调查。

您可以通过指定信号特性（如数值数据类型、初始值和值范围）来控制模型的数学行为。有关详细信息，请参阅信号基础知识。

模块

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信号属性

Signal Specification	指定信号所需的维度、采样时间、数据类型、数值类型和其他属性
IC	设置信号的初始值
Probe	Output signal attributes, including width, dimensionality, sample time, and complex signal flag
Rate Transition	处理以不同速率运行的模块之间的数据传输
Signal Editor	显示、创建、编辑和切换可互换场景。
Weighted Sample Time	Support calculations involving sample time
Width	Output width of input vector

信号转换

Bus to Vector	将虚拟总线转换为向量
Signal Conversion	将信号转换为新类型，而不改变信号值

函数

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信号属性

`disableimplicitsignalresolution`	Convert model to use only explicit signal resolution
`signalBuilderToSignalEditor`	Import signal data and properties from Signal Builder block to Signal Editor block
`Simulink.Signal`	指定信号或离散状态特定于实例的属性
`Simulink.ValueType`	Specify common set of signal properties for reuse (自 R2021b 起)

信号跟踪

`sltrace`	Analyze structure of model by tracing signal sources and destinations (自 R2021b 起)
`highlight`	Highlight path to signal sources or destinations in model (自 R2021b 起)
`removehighlight`	Remove highlighting for `sltrace.Graph` object from model (自 R2021b 起)

对象

sltrace.Graph Signal path traced using sltrace function (自 R2021b 起)

工具

信号属性	View and edit signal properties
插桩属性	View and edit logging and visualization properties for logged signal
属性检查器	Edit parameters and properties for any Simulink model element
模型数据编辑器	Inspect and edit data items (signals, parameters, and states) in a table that you can sort, group, and filter

模型设置

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连接诊断

信号标签不匹配	Diagnostic action to take when signal has multiple names through propagation
未连接的模块输入端口	Diagnostic action to take when block has unconnected input
未连接的模块输出端口	Diagnostic action to take when block has unconnected output
未连接的信号线	Diagnostic action to take when model has unconnected line or unmatched Goto or From block

主题

信号快速入门

信号基础知识
创建、配置、识别和测试信号。
信号类型
了解不同类型的信号，如控制信号和合成信号。
信号组
通过创建可互换的信号数据组来测试或调试模型。

信号属性

调查信号值
初始化、访问和查看仿真运行过程中的信号值。
指定信号范围
指定信号在仿真期间可以达到的最小值和最大值。通过指定信号在仿真过程中可以达到的最小值和最大值，充分指定您的设计并优化数据类型和生成的代码。
确定信号维度
检查和控制信号维度。
How Simulink Propagates Signal Properties in a Model
Inspect how Simulink^® propagates signal properties in a model.
初始化信号和离散状态
有些系统中包含的信号和状态的初始值必须由您来指定，例如，弹球的起始位置和速度。
将信号配置为测试点
使用测试点从优化中排除信号线，从而使您能够访问仿真数据。
Specify Common Set of Signal Properties as Value Type
Create a reusable value type for common signal properties, such as the application-specific signal properties of wind velocity. (自 R2021b 起)

显示信号属性

突出显示信号的源和目标
在调试或探查模型时，将信号跟踪到其源或目标。
使用端口值标签查看信号值
在仿真期间查看模块图中的信号值，以了解、分析和调试您的模型。
显示信号属性
通过在模块图中显示信号属性（如数据类型和维度）提高模型的易读性。
信号标签传播
命名信号，以便更容易识别和访问。利用信号标签传播功能可以减少跨不同系统为信号命名的工作量。
Trace Connections Using Interface Display
Display interfaces to trace signals through the nested levels, annotate signal characteristics, and view units associated with signals.

可变大小信号

可变大小信号基础知识
创建一个大小和值在仿真期间可能会发生变化的可变大小信号。
Inspect Variable-Size Signals on Simulink Models
Inspect example models that show how to use variable-size signals.
Unbounded Variable-Size Signals
Model unknown size data using dynamic arrays.

精选示例

Value Types at Interfaces

Assign a meaningful name to a set of properties at an interface and reuse that set of properties with value types.

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Find Shortest Control Path in Simulink Model

How to find the shortest control path for a hybrid electrical vehicle using Signal Tracing Command-line API.

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Arithmetic Operations on Matrix Signals

Perform arithmetic operations on signals carrying matrix and vector data.

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Model Feedback Control System

Model a feedback control system using Simulink® signals that carry matrix and vector representations of different components of the feedback system. In this example, the controller is designed for a buck-boost converter to track a reference voltage signal. Buck-boost converters are extensively used in distributed power supply systems and modern power electronics devices due to their high efficiency, high power density, low cost, and compact size.

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有界可变大小信号基本操作

此示例说明如何生成有界可变大小信号，并说明使用这些信号的一些操作。在此示例中，您使用 Selector 模块和 Switch 模块生成可变大小信号。这些信号用于数学运算、总线创建、总线选择、矩阵串联以及实现离散滤波器方程。

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Variable-Size Signal Length Adaptation

Model showing how to change the length of a signal over time.

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Multimode Variable-Size Signal

Use different operation modes to correspond to different signal sizes.

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Merging Signals

Use conditionally executed subsystems and the Merge block to combine two inputs into a single output.

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Unbounded Variable-Size Signal Basic Operations

Use unbounded variable-size signals in Simulink® modeling. For more information about the general concept of unbounded variable-size signals, see Unbounded Variable-Size Signals.

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Use Unbounded Variable-Size Signals Between Model Components

Use unbounded variable-size signals to handle unbounded-size data between different model components. The example also shows how to prepare the model for C++ code generation.

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