Abstract
In a feed-back control system, which is composed of two servo controllers and a controlled system of two inputs and two outputs with mutual interaction, it is necessary to investigate gains and parameters for compensating elements of each controller considering mutual relationship of two channels.
In this paper, when the open-loop forward gains of each channel are large for an ordinary servo control system, modifying and re-arranging the characteristic equations of the system, it shows that the system with mutual interaction could be treated approximately as separate equivalent circuits and the characteristics of the system could be easily obtained by the sample of calculation and diagrams of their root loci. In addition, the relationship in multi-channel system is discussed.
