LC – Lead compensator

Block SymbolLicensing group: STANDARD
PIC

Function Description
The LC block is a discrete simulator of derivative element

C(s) = td s tdnd s + 1,

where td is the derivative constant and nd determines the influence of parasite 1st order filter. It is recommended to use 2 nd 10. If ISSF = on, then the state of the parasite filter is set to the steady value at the block initialization according to the input signal u.

The exact discretization at the sampling instants is used for discretization of the C(s) transfer function.

Input

u

Analog input of the block

Double (F64)

R1

Block reset (same state as after init)

Bool

HLD

Hold block execution

Bool

Output

y

Analog output of the block

Double (F64)

Parameters

td

Derivative time constant  1.0

Double (F64)

nd

Derivative filtering parameter  10.0

Double (F64)

ISSF

Steady state at start-up

Bool

off ..

Zero initial state

on ...

Initial steady state

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