Inverse

Library

Non_linear

Description

This block computes $y(i)=1/u(i)$. The input (output) size is determined by the context

Default properties

• always active: no
• direct-feedthrough: yes
• zero-crossing: no
• mode: no
• number/sizes of inputs: 1 / -1
• number/sizes of outputs: 1 / -1
• number/sizes of activation inputs: 0 /
• number/sizes of activation outputs: 0 /
• continuous-time state: no
• discrete-time state: no
• name of computational function: invblk

Interfacing function

scilab/macros/scicos_blocks/nonlinear/INVBLK_f.sci

Computational function (type 0)

      subroutine invblk(flag,nevprt,t,xd,x,nx,z,nz,tvec,ntvec,
     &     rpar,nrpar,ipar,nipar,u,nu,y,ny)
c     Copyright INRIA

c     Scicos block simulator
c     Outputs the inverse of the input
c
      double precision t,xd(*),x(*),z(*),tvec(*),rpar(*),u(*),y(*)
      integer flag,nevprt,nx,nz,ntvec,nrpar,ipar(*)
      integer nipar,nu,ny


      double precision ww
c
      if(flag.eq.6) then
         do 10 i=1,nu
            ww=u(i)
            if(ww.ne.0.0d0) then
               y(i)=1.0d0/ww
            endif
 10         continue
      endif
c
      if(flag.eq.1) then
         do 15 i=1,nu
            ww=u(i)
            if(ww.ne.0.0d0) then
               y(i)=1.0d0/ww
            else
               flag=-2
               return
            endif
 15      continue
      endif
      end