IMPROVEMENT OF TRANSIENT-RESPONSE BY MEANS OF VARIABLE SET-POINT WEIGHTING

A new approach is introduced for speeding up the transient set point r esponse of a control system by adapting the set point weighting factor in the controller. For a proportional-integral-derivative (PLD) contr oller, the initial set point weighting factor, the instants at which t his factor should be varied, and the adapted value of the set point we ighting factor are all given by a set of correlation formulae which ca n be used in conjunction with the refined Ziegler-Nichols tuning formu la, Analysis has also led to an equivalent block diagram more suitable for its implementation as a set point filter with a variable zero in its transfer function.