MoMAS
® employs a control principle which is exactly suited for temperature control in metal extruders. By exploiting the cyclic property of the process, one can successfully manage to master the large time-lags and disturbances inherent for the extrusion process.
The core of MoMAS® is the exit temperature measurement and control
system which
is employed to maintain the exit temperature at a constant predetermined
value.
MoMAS® employs the iterative learning predictive feed- back and adaptive
feed- forward control principles. The extremely robust off- line
open-loop control in conjunction with an on- line closed loop permits a
variety of possibilities for optimising the extrusion process. The
off-line technique facilitates the application of non-causal filtering
for lag-free smoothing of the pyrometer signal and the elimination of
effects of the sluggishness of the extruder. At the same time existing
safety measures are not influenced.
Runs of profile
temperature and ram speed over cycles retrieved from the
MoMAS Data base
The function of the control can be seen by clicking here: Video
