Using Simulink

Dead Zone

Provide a region of zero output.

Library

Nonlinear

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.

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.

Characteristics

Direct Feedthrough	Yes
Sample Time	Inherited from driving block
Scalar Expansion	Of parameters
Dimensionalized	Yes
Zero Crossing	Yes, to detect when the limits are reached

Data Type Conversion

Demux