Limit input signal to the upper and lower saturation values - Simulink - 万博1manbetx,s manbetx 845,万博尤文图斯

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Simulink / Commonly Used Blocks
Simulink / Discontinuities

Input	Output
Lower limit ≤ Input value ≤ Upper limit	Input value
Input value < Lower limit	Lower limit
Input value > Upper limit	Upper limit

Ports

Input

expand all

`Port_1`— Input signal
scalar | vector

The input signal to the saturation algorithm.

Output

expand all

`Port_1`— Output signal
scalar | vector

Output signal that is the value of the input signal, upper saturation limit, or lower saturation limit.

Parameters

expand all

Main

`Upper limit`— Upper saturation boundary for the input signal
`0.5`(default) | scalar | vector

Specify the upper bound on the input signal. If the input signal is greater than this boundary, then the output signal is set to this saturation value. TheUpper limitparameter is converted to the output data type using round-to-nearest and saturation.Upper limitmust be greater than theOutput minimumparameter and less than theOutput maximumparameter.

Programmatic Use

Block Parameter:UpperLimit

Type: character vector

Value: real scalar or vector

Default:'0.5'

`Lower limit`— Lower saturation boundary for the input signal
`-0.5`(default) | scalar | vector

Specify the lower bound on the input signal. If the input signal is less than this boundary, then the output signal is set to this saturation value. TheLower limitparameter is converted to the output data type using round-to-nearest and saturation.Lower limitmust be greater than theOutput minimumparameter and less than theOutput maximumparameter.

Programmatic Use

Block Parameter:LowerLimit

Type: character vector

Value: real scalar or vector

Default:'-0.5'

`Treat as gain when linearizing`— Specify the gain value
`On`(default) | Boolean

Select this check box to cause the commands to treat the gain as 1. The linearization commands in Simulink^®software treat this block as a gain in state space. Clear the box to have the commands treat the gain as 0.

Programmatic Use

Block Parameter:LinearizeAsGain

Type: character vector

Values:'off'|'on'

Default:'on'

`Enable zero-crossing detection`— Enable zero-crossing detection
`on`(default) | Boolean

Select to enable zero-crossing detection. For more information, seeZero-Crossing Detection.

Programmatic Use

Block Parameter:ZeroCross

Type: character vector

Values:'off'|'on'

Default:'on'

`Sample time`— Specify sample time as a value other than`-1`
`-1`(default) | scalar

Specify the sample time as a value other than -1. For more information, seeSpecify Sample Time.

Dependencies

This parameter is not visible unless it is explicitly set to a value other than-1. To learn more, seeBlocks for Which Sample Time Is Not Recommended.

Programmatic Use

Block Parameter:SampleTime

Type:character vector

Values:scalar

Default:'-1'

Signal Attributes

Click theShow data type assistantbuttonto display theData Type Assistant, which helps you set the data type attributes. SeeSpecify Data Types Using Data Type Assistantfor more information.

`Output minimum`——最小输出值范围检查
`[]`(default) | scalar

Lower value of the output range that Simulink checks.

Simulink uses the minimum to perform:

Parameter range checking (seeSpecify Minimum and Maximum Values for Block Parameters) for some blocks.
Simulation range checking (seeSignal RangesandEnable Simulation Range Checking).
Automatic scaling of fixed-point data types.
Optimization of the code that you generate from the model. This optimization can remove algorithmic code and affect the results of some simulation modes such as SIL or external mode. For more information, seeOptimize using the specified minimum and maximum values(Simulink Coder).

Note

Output minimumdoes not saturate or clip the actual output signal. Use theSaturationblock instead.

Programmatic Use

Block Parameter:OutMin

Type: character vector

Values:'[ ]'| scalar

Default:'[ ]'

`Output maximum`— Maximum output value for range checking
`[]`(default) | scalar

Upper value of the output range that Simulink checks.

Simulink uses the maximum value to perform:

Parameter range checking (seeSpecify Minimum and Maximum Values for Block Parameters) for some blocks.
Simulation range checking (seeSignal RangesandEnable Simulation Range Checking).
Automatic scaling of fixed-point data types.
Optimization of the code that you generate from the model. This optimization can remove algorithmic code and affect the results of some simulation modes such as SIL or external mode. For more information, seeOptimize using the specified minimum and maximum values(Simulink Coder).

Note

Output maximumdoes not saturate or clip the actual output signal. Use theSaturationblock instead.

Programmatic Use

Block Parameter:OutMax

Type: character vector

Values:'[ ]'| scalar

Default:'[ ]'

`Output data type`— Specify the output data type
`继承:Same as input`(default) |`继承:Inherit via back propagation`|`double`|`single`|`int8`|`int32`|`uint32`|`fixdt(1,16,2^0,0)`|| ...

Choose the data type for the output. The type can be inherited, specified directly, or expressed as a data type object such asSimulink.NumericType.

Programmatic Use

Block Parameter:OutDataTypeStr

Type: character vector

Values:'Inherit: Same as input','Inherit: Inherit via back propagation','single','int8','uint8',int16,'uint16','int32','uint32',fixdt(1,16,0),fixdt(1,16,2^0,0),fixdt(1,16,2^0,0).''

Default:'Inherit: Same as input'

`Lock output data type setting against changes by the fixed-point tools`— Prevent fixed-point tools from overriding Output data type
`off`(default) |`on`

Select this parameter to prevent the fixed-point tools from overriding theOutputdata type you specify on the block. For more information, seeUse Lock Output Data Type Setting(Fixed-Point Designer).

Programmatic Use

Block Parameter:LockScale

Type:character vector

Values:'off' | 'on'

Default:'off'

`Integer rounding mode`— Specify the rounding mode for fixed-point operations
`Floor`(default) |`Ceiling`|`Convergent`|`Nearest`|`Round`|`Simplest`|`Zero`

Choose one of these rounding modes.

Ceiling: Rounds both positive and negative numbers toward positive infinity. Equivalent to the MATLAB^®ceilfunction.
Convergent: 附近的轮数est representable value. If a tie occurs, rounds to the nearest even integer. Equivalent to the Fixed-Point Designer™convergentfunction.
Floor: Rounds both positive and negative numbers toward negative infinity. Equivalent to the MATLABfloorfunction.
Nearest: 附近的轮数est representable value. If a tie occurs, rounds toward positive infinity. Equivalent to the Fixed-Point Designernearestfunction.
Round: 附近的轮数est representable value. If a tie occurs, rounds positive numbers toward positive infinity and rounds negative numbers toward negative infinity. Equivalent to the Fixed-Point Designerroundfunction.
Simplest: Automatically chooses between round toward floor and round toward zero to generate rounding code that is as efficient as possible.
Zero: Rounds number toward zero. Equivalent to the MATLABfixfunction.

Programmatic Use

Block Parameter:RndMeth

Type: character vector

Default:'Floor'

Model Examples

Using the Quantizer and Saturation blocks in sldemo_boiler

This example shows how the Quantizer and Saturation blocks are used in the model ex_sldemo_boiler. The ADC subsystem digitizes the input analog voltage by:

Open Model

Block Characteristics

Data Types	`double`\|`single`\|`base integer`\|`fixed point`
多维信号	`No`
Variable-Size Signals	`No`

Extended Capabilities

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

HDL Code Generation
Generate Verilog and VHDL code for FPGA and ASIC designs using HDL Coder™.

For more information on HDL code generation, seeSaturation.

Documentation

Saturation

Description

Ports

Input

Port_1— Input signalscalar | vector

Output

Port_1— Output signalscalar | vector

Parameters

Main

Upper limit— Upper saturation boundary for the input signal0.5(default) | scalar | vector

Programmatic Use

Lower limit— Lower saturation boundary for the input signal-0.5(default) | scalar | vector

Programmatic Use

Treat as gain when linearizing— Specify the gain valueOn(default) | Boolean

Programmatic Use

Enable zero-crossing detection— Enable zero-crossing detectionon(default) | Boolean

Programmatic Use

Sample time— Specify sample time as a value other than-1-1(default) | scalar

Dependencies

Programmatic Use

Signal Attributes

Output minimum——最小输出值范围检查[](default) | scalar

Note

Programmatic Use

Output maximum— Maximum output value for range checking[](default) | scalar

Note

Programmatic Use

Output data type— Specify the output data type继承:Same as input(default) |继承:Inherit via back propagation|double|single|int8|int32|uint32|fixdt(1,16,2^0,0)|| ...

Programmatic Use

Lock output data type setting against changes by the fixed-point tools— Prevent fixed-point tools from overriding Output data typeoff(default) |on

Programmatic Use

Integer rounding mode— Specify the rounding mode for fixed-point operationsFloor(default) |Ceiling|Convergent|Nearest|Round|Simplest|Zero

Programmatic Use

See Also

Model Examples

Using the Quantizer and Saturation blocks in sldemo_boiler

Block Characteristics

Extended Capabilities

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

HDL Code GenerationGenerate Verilog and VHDL code for FPGA and ASIC designs using HDL Coder™.

PLC Code GenerationGenerate Structured Text code using Simulink® PLC Coder™.

Fixed-Point ConversionConvert floating-point algorithms to fixed point using Fixed-Point Designer™.

See Also

Introduced before R2006a

Simulink Documentation

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`Port_1`— Input signal
scalar | vector

`Port_1`— Output signal
scalar | vector

`Upper limit`— Upper saturation boundary for the input signal
`0.5`(default) | scalar | vector

`Lower limit`— Lower saturation boundary for the input signal
`-0.5`(default) | scalar | vector

`Treat as gain when linearizing`— Specify the gain value
`On`(default) | Boolean

`Enable zero-crossing detection`— Enable zero-crossing detection
`on`(default) | Boolean

`Sample time`— Specify sample time as a value other than`-1`
`-1`(default) | scalar

`Output minimum`——最小输出值范围检查
`[]`(default) | scalar

`Output maximum`— Maximum output value for range checking
`[]`(default) | scalar

`Output data type`— Specify the output data type
`继承:Same as input`(default) |`继承:Inherit via back propagation`|`double`|`single`|`int8`|`int32`|`uint32`|`fixdt(1,16,2^0,0)`|| ...

`Lock output data type setting against changes by the fixed-point tools`— Prevent fixed-point tools from overriding Output data type
`off`(default) |`on`

`Integer rounding mode`— Specify the rounding mode for fixed-point operations
`Floor`(default) |`Ceiling`|`Convergent`|`Nearest`|`Round`|`Simplest`|`Zero`

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

HDL Code Generation
Generate Verilog and VHDL code for FPGA and ASIC designs using HDL Coder™.

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

Fixed-Point Conversion
Convert floating-point algorithms to fixed point using Fixed-Point Designer™.