Method for controlling cyclic process to control rotation speed of crankshaft of vehicle, involves converting cyclic offset into variable portion by element, where element is transfer function that describes pole locations of trouble

摘要

The method involves comparing an actual value (Y) with a reference value (W) to form an actual offset (E). A cyclic offset is formed based on the actual offset by an element. The cyclic offset is converted into a cyclic manipulated variable portion by another element, where the latter element is a transfer function that describes pole locations of a periodical trouble (D). A parallel manipulated variable portion (U'') is formed by a controller (K). A manipulated variable (U) is formed from the portions, where the variable is influenced by the trouble and acts on a controlled system (G). The periodical trouble is sinusoidal.