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地面

地面unconnected input port

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  • 地面block

Description

The Ground block connects to blocks whose input ports do not connect to other blocks. If you run a simulation with blocks that have unconnected input ports, Simulink®issues warnings. Using a Ground block to ground those unconnected blocks can prevent these warnings.

使用Fixed-Point Data Types

When working with fixed-point data types, there may be instances where the fixed-point data type cannot represent zero exactly. In these cases, the Ground block outputs a nonzero value that is the closest possible value to zero. This behavior applies only to fixed-point data types with nonzero bias. These expressions are examples of fixed-point data types that cannot represent zero:

  • fixdt(0, 8, 1, 1)— an unsigned 8-bit type with slope of 1 and bias of 1

  • fixdt(1, 8, 6, 3)— a signed 8-bit type with slope of 6 and bias of 3

Working with Enumerated Data Types

When working with enumerated data types, the Ground block outputs the default value of the enumeration. This behavior applies whether:

  • The enumeration can represent zero

  • The default value of the enumeration is zero

If the enumerated type does not have a default value, the Ground block outputs the first enumeration value in the type definition.

Ports

Output

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The Ground block outputs a scalar signal with zero value, and the same data type as the port to which it connects.

Data Types:single|double|一半|int8|INT16|int32|int64|uint8|uint16|uint32|uint64|string|Boolean|固定点|枚举|bus|image

Model Examples

地面块中的整数和枚举数据类型支持金宝app

地面块中的整数和枚举数据类型支持金宝app

Use the Ground block to ground block input ports that have integer and enumerated data types.
开放型号
Fixed-Point Data Type Support in the Ground Block

Fixed-Point Data Type Support in the Ground Block

Use the Ground block to ground block input ports that have fixed-point data types.
开放型号
Double Bouncing Ball: Use of Adaptive Zero-Crossing Location

Double Bouncing Ball: Use of Adaptive Zero-Crossing Location

Choose the correct zero-crossing location algorithm, based on the system dynamics. For Zeno dynamic systems, or systems with strong chattering, you can select the adaptive zero-crossing detection algorithm through the Configure pane:
开放型号
Triggered Subsystems

Triggered Subsystems

Model showing triggered subsystems and different types of triggers.
开放型号

块特征

Data Types

Boolean|bus|double|枚举|固定点|一半|integer|single|string

直接进料

不

Multidimensional Signals

yes

Variable-Size Signals

不

Zero-Crossing Detection

不

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

PLC Code Generation
Generate Structured Text code using Simulink® PLC Coder™.

Fixed-Point Conversion
使用定点Designer™设计和模拟定点系统。

Version History

在R2006a之前引入

See Also

Topics