抄録
In computer control systems, especially in a DDC system, digital controllers act according to the computer control algorithms.
In this paper the discrete PI control algorithm in DDC systems is discussed. Using the method by J.W. Sten to obtain the two time constants and dead time for a second-order process, the general solutions that give a set of optimall control parameters are obtained. In order to find the optimal control parameters the conjugate gradient method is used.
