Festo Кабели и принадлежности - Manual (Page 433)

B. Optimizing the positioning behaviour
B−3
Festo P.BE−SPC200−EN en 0901d
B.1 Basic information on control
The basis for control of the pneumatic axes is a model control
path stored in the SPC200. This model assumes a pneumatic
axis which is built up in accordance with specifications, e.g.
with regard to:
ć the compressed air provided
ć the valve−cylinder combination used
ć the permitted mass load
ć tubing sizes and lengths, etc.
The basic parameters of this control path are:
ć the axis and application data to be entered
ć internal data ascertained by the system identification and
by adaptation.
System identification During commissioning, variables such as the maximum
achievable speed, acceleration ability, static friction and
valve characteristics of the axis are ascertained based on a
dynamic and static system identification run.
Adaptation With adaptation, the positioning behaviour is continuously
monitored during operation.. Internal controller data are
adapted here to the actual state of the axis, e.g. in order to
compensate for system wear etc. during the service period.