Simulink Reference

Dead Zone

Provide a region of zero output

Library

Discontinuities

Description

The Dead Zone block generates zero output within a specified region, called its dead zone. The lower and upper limits of the dead zone are specified as the Start of dead zone and End of dead zone parameters. The block output depends on the input and dead zone:

• If the input is within the dead zone (greater than the lower limit and less than the upper limit), the output is zero.
• If the input is greater than or equal to the upper limit, the output is the input minus the upper limit.
• If the input is less than or equal to the lower limit, the output is the input minus the lower limit.

This sample model uses lower and upper limits of -0.5 and +0.5, with a sine wave as input.

This plot shows the effect of the Dead Zone block on the sine wave. While the input (the sine wave) is between -0.5 and 0.5, the output is zero.

Data Type Support

A Dead Zone block accepts and outputs a real signal of any data type except int64 and uint64.

Parameters and Dialog Box

Start of dead zone

The lower limit of the dead zone. The default is -0.5.

End of dead zone

The upper limit of the dead zone. The default is 0.5.

Treat as gain when linearizing

Simulink's linearization commands treat this block as a gain in state space. Selecting this option causes the commands to treat the gain as 1; otherwise, the commands treat the gain as 0.

Enable zero crossing detection

Select to enable zero crossing detection to detect when the limits are reached. For more information, see Zero Crossing Detection in the Using Simulink documentation.

Characteristics

Direct Feedthrough	Yes
Sample Time	Inherited from driving block
Scalar Expansion	Of parameters
Dimensionalized	Yes

Data Type Conversion

Demux