Verfahren und Schaltungsanordnung zur Regelung eines zweidimensionalen Vektors einer Strecke mittels eines wertediskreten Stellgliedes mit begrenzter Schaltfrequenz.

摘要

The invention relates to a method and a circuit arrangement (32) for controlling a two-dimensional vector (us) of a path (10, 12), by means of a discrete-value actuating element (8) having a limited switching frequency (fs). According to the invention, a control variable desired value (ip*) is initially selected which is produced from the desired values (us*, is*) of this two-dimensional vector (Us) of the control path (10, 12), these control variable actual values (ipn, ipn+1, ipn+2) are alternated during one switching period (Tges) in a prescribed sequence and with prescribed dwell durations (Tm, Tm+1, Tm+2) such that the time mean value of the first vector (us) is equal to its desired value (us*) over one revolution of a formed desired trajectory (TR*), and the next vector (ipn+1, ipn+2, ipn) of the selected control variable vector triple is then driven precisely when the separation between the vector (us) and the next corner point (uso) of the location curve (TR*) is minimal. Thus, with a given, limited switching frequency (fs) a minimum deviation from the desired value is obtained, the time mean value corresponding to the desired value, and a control-response time which is as short as possible is obtained at the same time. ……