Enable
将使能端口添加到子系统或模型
库:
Simulink /
Ports & Subsystems
HDL Coder /
Ports & Subsystems
描述
Enable 模块允许外部信号控制子系统或模型的执行。要启用此功能，可在 Subsystem 模块中添加该模块，或在 Model 模块所引用模型的根级别添加该模块。
如果在模型的根级别使用使能端口：
对于多速率模型，请将求解器设置为单任务。
对于具有定步长的模型，模型中有至少一个模块必须以指定的定步长速率运行。
示例
使用使能子系统实现控制算法
此示例显示如何使用启用的子系统来实现基于二进制逻辑信号的控制算法。当二进制信号具有值时，启用的子系统执行并实现控制算法。在这个示例中，超扭转控制算法用于稳定不稳定的动态系统。超扭转算法是一种众所周知的滑模控制技术，具有鲁棒性好的特点。
Control Block States and Output of Enabled Subsystem
Reset or hold states of blocks inside an Enabled Subsystem block when the subsystem is disabled and how to control the subsystem output. In this example, you see four different combinations of state and output value configurations for both discrete and continuous control signals. When the enabled subsystem is disabled, the combinations work as follows:
大数定律的例证
此示例显示如何使用 MATLAB 系统模块来说明大数定律。
Counters Using Conditionally Executed Subsystems
Implement counters using Enabled and Triggered subsystems. In this example, the model sldemo_counters controls flow of water into a tank and uses a counter to count the number of times overflow occurs, where overflow occurs when the water level in the tank is 8 meters or more for 30 seconds or more.
Building a Clutch Lock-Up Model
Use Simulink® to model and simulate a rotating clutch system. Although modeling a clutch system is difficult because of topological changes in the system dynamics during lockup, this example shows how enabled subsystem can easily handle such problems. We illustrate how to employ important Simulink modeling concepts in the creation of the clutch simulation. Designers can apply these concepts to many models with strong discontinuities and constraints that may change dynamically.
端口
输出
参数
模块特性
数据类型 |
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直接馈通 |
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多维信号 |
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可变大小信号 |
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过零检测 |
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扩展功能
版本历史记录
在 R2006a 之前推出
