Rate Limiter (Simulink Reference)

Limit the rate of change of a signal

Library

Discontinuities

Description

The Rate Limiter block limits the first derivative of the signal passing through it. The output changes no faster than the specified limit. The derivative is calculated using this equation.

u(i) and t(i) are the current block input and time, and y(i-1) and t(i-1) are the output and time at the previous step. The output is determined by comparing rate to the Rising slew rate and Falling slew rate parameters:

If rate is greater than the Rising slew rate parameter (R), the output is calculated as

If rate is less than the Falling slew rate parameter (F), the output is calculated as

If rate is between the bounds of R and F, the change in output is equal to the change in input:

Data Type Support

A Rate Limiter block accepts and outputs signals of type double.

Parameters and Dialog Box

Rising slew rate: The limit of the derivative of an increasing input signal.
Falling slew rate: The limit of the derivative of a decreasing input signal.

Characteristics

Direct Feedthrough
Yes

Sample Time
Continuous

Scalar Expansion
Of input and parameters

Dimensionalized
Yes

Zero Crossing
No

Direct Feedthrough	Yes
Sample Time	Continuous
Scalar Expansion	Of input and parameters
Dimensionalized	Yes
Zero Crossing	No

Random Number Rate Transition