Figure 17 Simulated behaviour for a slow variation of the optimum. When was varied faster, but still as a sine added to a constant level, the control-signal was not able to follow the optimum (Fig. 18, left figure), but reducing t and increasing u could remedy the situation. If the variations in was regarded as a disturbance around a constant optimum value instead, the simulations again showed that the control algorithm was sensitive to disturbances with large variance. However, the control algorithm behaved differently for different frequencies of the disturbance.
Published on Nov 9, 2011