126

>

4.2.3.2.1  Set  direction
The  diagram  assumes  a  nested  structure  of  the  control  process  (see  part  A  of  this  study).  The  central
element  of  track  control  is  formed  by  an  adjustment  process  for  the  heading,  which  determines  a  set
value  for  the  rudder  angle  from  the  control  deviation  of  the  heading.  In  a  control  loop  lying  above  this,
the  set  value  for  the  heading  is  determined  from  a  set  value  for  course  made  good.  In  the  outer  loop  is
located  the  actual  “track  control”,  which  determines  a  set  value  for  course  made  good  from  the  current
track  deviation.  The  advantage  of  this  approach  is  that  all  theoretically  possible  degrees  of  automation
can  be  reproduced  by  this  model,  from  manual  control  through  to  the  differing  adjustment  modes  of
modern  track  control  systems  (“heading/course/track  control”).

set  HDG

DFD  2.2.2:  Set  direction