Rate Limiter

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Rate Limiter

Specifies a maximum rate of change of a signal.

Inputs/Outputs

A Boolean or a Boolean array that determines whether to use initial output to compute the rate limiter.

True	Uses initial output to compute the rate limiter.
False	Uses the previous output to compute the rate limiter.

This node automatically uses initial output to compute the rate limiter on the first call.

Default value: False

Input signal.

This input accepts a double-precision, floating-point number or an array of double-precision, floating-point numbers.

Allowable positive change in the output signal between successive calls to this node.

This input accepts a double-precision, floating-point number or an array of double-precision, floating-point numbers.

Default value: 0

Allowable negative change in the output signal between successive calls to this node.

This input accepts a double-precision, floating-point number or an array of double-precision, floating-point numbers.

Default value: 0

Output value on the first call to this node or when reset is True.

This input accepts a double-precision, floating-point number or an array of double-precision, floating-point numbers.

Default value: 0

Loop-cycle time or interval, in seconds, at which this node is called.

dt must be greater than zero.

Output signal.

This output can return a double-precision, floating-point number or an array of double-precision, floating-point numbers.

The following equations define the rate limiter function.

D = \frac{u (t) - y (t - 1)}{d t}

D = \frac{u (t) - y (t - 1)}{d t}

y (t) = {\begin{matrix} positive slew rate \times d t + y (t - 1) if D > positive slew rate \\ negative slew rate \times d t + y (t - 1) if D < negative slew rate \\ u (t) otherwise \end{matrix}

y (t) = {\begin{matrix} positive slew rate \times d t + y (t - 1) if D > positive slew rate \\ negative slew rate \times d t + y (t - 1) if D < negative slew rate \\ u (t) otherwise \end{matrix}

where