The structures of modern automatic control systems often have many contours. The method of structural schemes automated transformation to obtain the transfer functions of the system with an arbitrary combination of external input and output actions of the blocks has been proposed. The inputs of the blocks are connected to the outputs of the previous blocks. Therefore, the analysis of output actions is simultaneously considered to be the analysis of input actions. But there is also a need to analyze separately the actions at inputs and outputs of the blocks. The result of the manipulation is matrix of transfer functions of the system. It can be for outputs and inputs of blocks’ actions. The presented method can be used in the controllers’ synthesis.

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