Internal Process Controls - Control of Color Imaging Systems: Analysis and Design - page 535

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

0 50 100 150 200 250

Print number, k

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0

0 50 100 150 200 250

(b) Print number, k

FIGURE 9.48 (continued) Area coverage profile used for the TC control algorithm
(obtained using a scanner from magazine samples).

improved steady-state error as compared with the PI controller with Smith predictor
and a nonoptimized model predictive controller (not described in this topic).
The ned as the ratio of the area under the curve

with disturbances and uncertainties to that without any such disturbance, is
calculated by measuring the area under the response curve with respect to the
target. In our comparison, the ideal

figure of merit, which is de

figure of merit is a step response from 3% to
4%. When the TC response is above the target value, then it is subtracted from the
required area. The

figure of merit in Table 9.2 shows overall improvement can be
achieved with state feedback methods. More advanced methods such as model
predictive controller can be further optimized to work similar to or better than the
state feedback method for the same problem.