Transfer Fcn Lead or Lag (Simulink Reference)

Implement a discrete-time lead or lag compensator

Library

Discrete

Description

The Transfer Fcn Lead or Lag block implements a discrete-time lead or lag compensator of the input. The instantaneous gain of the compensator is one, and the DC gain is equal to (1-z)/(1-p), where z is the zero and p is the pole of the compensator.

The block implements a lead compensator when 0 < z < p < 1, and implements a lag compensator when 0 < p < z < 1.

Data Type Support

The Transfer Fcn Lead or Lag block accepts signals of any data type supported by Simulink, including fixed-point data types.

Parameters and Dialog Box

Pole of compensator (in Z plane): Set the pole.
Zero of compensator (in Z plane): Set the zero.
Initial condition for previous output: Set the initial condition for the previous output.
Initial condition for previous input: Set the initial condition for the previous input.
Round toward: Rounding mode for the fixed-point output.
Saturate to max or min when overflows occur: If selected, fixed-point overflows saturate.

Characteristics

Direct Feedthrough

Yes

Scalar Expansion

Yes, of initial conditions

Direct Feedthrough	Yes
Scalar Expansion	Yes, of initial conditions

Transfer Fcn First Order Transfer Fcn Real Zero