LC – Lead compensator

Block SymbolLicensing group: STANDARD

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

C (s) = \frac{td * s}{\frac{td}{nd} * s + 1},

where td is the derivative constant and nd determines the influence of parasite 1st order filter. It is recommended to use $2 \leq nd \leq 10$ . 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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