Segnali
I segnali trasmettono i dati tra due blocchi in una simulazione. I dati possono essere l'output calcolato di un blocco o semplicemente un messaggio. I valori dei segnali vengono calcolati in tutti i punti durante il tempo di simulazione. È possibile visualizzare i dati e le proprietà del segnale durante e dopo la simulazione, vedere i valori in tempo reale su un diagramma a blocchi o registrare i valori come variabili nell'area di lavoro. Inoltre, è possibile esportare i segnali in un file o in un'area di lavoro per eseguire ulteriori indagini.
È possibile controllare il comportamento matematico di un modello specificando le caratteristiche del segnale, come il tipo di dati numerici, il valore iniziale e l'intervallo di valori. Per ulteriori informazioni, vedere Signal Basics.
Blocchi
Funzioni
Oggetti
sltrace.Graph | Signal path traced using sltrace function (Da R2021b) |
Strumenti
| Signal Properties | View and edit signal properties |
| Instrumentation Properties | View and edit logging and visualization properties for logged signal |
| Property Inspector | Edit parameters and properties for any Simulink model element |
| Model Data Editor | Inspect and edit data items (signals, parameters, and states) in a table that you can sort, group, and filter |
| Component Interface View | Display component interfaces to trace port connections and author ports |
Impostazioni modello
Argomenti
Come iniziare con i segnali
- Signal Basics
Create, configure, identify, and test signals. - Signal Types
Learn about different types of signals, such as control signals and composite signals. - Signal Groups
Test or debug models by creating interchangeable groups of signal data.
Proprietà del segnale
- Investigate Signal Values
Initialize, access, and view the values that signals have during a simulation run. - Specify Signal Ranges
Specify the minimum and maximum value that a signal can attain during simulation. Fully specify your design and optimize data types and the generated code by specifying the minimum and maximum value that a signal can attain during simulation. - Determine Signal Dimensions
Inspect and control signal dimensionality. - How Simulink Propagates Signal Properties in a Model
Inspect how Simulink® propagates signal properties in a model. - Initialize Signals and Discrete States
Some systems contain signals and states whose initial values you must specify, for example, the starting position and velocity of a bouncing ball. - Configure Signals as Test Points
Use test points to exclude signal lines from optimizations which enables you to access the simulation data. - 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. (Da R2021b)
Visualizzazione delle proprietà del segnale
- Highlight Signal Sources and Destinations
Trace a signal to its source or destination while debugging or exploring a model. - View Signal Values Using Port Value Labels
View signal values in the block diagram during simulation to understand, analyze, and debug your model. - Display Signal Attributes
Improve model readability by displaying signal attributes, such as data types and dimensions, in the block diagram. - Signal Label Propagation
Name a signal to identify and access it more easily. Take advantage of signal label propagation to reduce the effort of naming a signal that crosses system boundaries. - Trace Connections and Author Ports Using Component Interface View
Display component interfaces to trace port connections and author ports.
Segnali di dimensione variabile
- Variable-Size Signal Basics
Create a variable-size signal whose size and values can change during a simulation. - 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.
Informazioni complementari
Esempi in primo piano
Value Types at Component Interfaces
Assign a meaningful name to a set of properties at an interface and reuse that set of properties with value types.
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.
Arithmetic Operations on Matrix Signals
Perform arithmetic operations on signals carrying matrix and vector data.
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.
Operazioni di base con segnali a dimensione variabile vincolata
Questo esempio mostra come generare segnali a dimensione variabile vincolata e illustra alcune operazioni che utilizzano tali segnali. In questo esempio, si generano segnali a dimensione variabile utilizzando il blocco Selector e il blocco Switch. I segnali sono utilizzati nelle operazioni matematiche, nella creazione di bus, nella selezione di bus, nella concatenazione di matrici e per implementare l'equazione di un filtro discreto.
Variable-Size Signal Length Adaptation
Model showing how to change the length of a signal over time.
Multimode Variable-Size Signal
Use different operation modes to correspond to different signal sizes.
Merging Signals
Use conditionally executed subsystems and the Merge block to combine two inputs into a single output.
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.
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.
