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Справка Scilab >> Xcos > palettes > Continuous time systems palette > CLR


Continuous transfer function

Block Screenshot


This block realizes a SISO linear system represented by its rational transfer function Numerator/Denominator. The rational function must be proper (denominator degree must be less or equal to numerator degree).


  • Numerator

    This parameter sets the numerator of the transfer function.

    This must be a polynomial in s.

    Properties : Type 'pol' of size 1.

    In the provided expression, any subexpression being an exponent given either by a variable (of the context) whose name is more than 1-character long, or by an expression (not a literal integer) must end with a space to be correctly displayed on the block's icon.

    This constrain has no consequence on the computational validity of the expression.

    Examples: "s^12+1", "s^ +12+1", "s^+ 12+1" are all displayed as "s^{12}+1", while "1+s^ab+s^2" will be displayed as "1+s^{ab+s^2}" (but will be well computed as 1 + s^ab + s^2). To make it well displayed, "1+s^ab +s^2" will have to be entered (for instance).
  • Denominator

    This parameter sets the denominator of the transfer function.

    This must be a polynomial in s.

    Properties : Type 'pol' of size 1.

    Take care about multichar exponents (see Numerator).

Default properties

  • always active: yes

  • direct-feedthrough: no

  • zero-crossing: no

  • mode: no

  • regular inputs:

    - port 1 : size [1,1] / type 1

  • regular outputs:

    - port 1 : size [1,1] / type 1

  • number/sizes of activation inputs: 0

  • number/sizes of activation outputs: 0

  • continuous-time state: yes

  • discrete-time state: no

  • object discrete-time state: no

  • name of computational function: csslti4

Interfacing function

  • SCI/modules/scicos_blocks/macros/Linear/CLR.sci

Computational function

  • SCI/modules/scicos_blocks/src/c/csslti4.c (Type 4)

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Last updated:
Tue Feb 25 08:54:58 CET 2020