DLR

Block Screenshot

Contents

• Description
• Parameters
• Default properties
• Interfacing function
• Computational function

Description

This block realizes a SISO linear system represented by its rational transfer function (in the symbolic variable z). The rational function must be proper.

Parameters

• Numerator (z)

  This parameter sets the numerator of the transfer function.

  This must be a polynomial inz .

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

• Denominator (z)

  This parameter sets the denominator of the transfer function.

  This must be a polynomial inz .

  Properties : Type 'pol' of size 1.

  Take care about multichar exponents (see Numerator).

Default properties

• always active: no

• 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: 1

• number/sizes of activation outputs: 0

• continuous-time state: no

• discrete-time state: yes

• object discrete-time state: no

• name of computational function: dsslti4

Interfacing function

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

Computational function

• SCI/modules/scicos_blocks/src/c/dsslti4.c (Type 4)