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...Example problems and solutions a simplify the block diagram shown in figure solution first move branch point of path involving hi outside loop h as then eliminating two loops results b combining blocks into one gives c obtain transfer function relating s r di tgr ln syrern simplified ock diagrams for ystem system reduction can be modified to that minor feedforward we which is thus given by same result also obtained proceeding follows since signal x sum signals gi have output g hence gx so before closed lr u chapter mathematical modeling dynamic systems successive reductions ol diagraln between right hand side con taining summing left see simplifying each further simplification from functions d e hc control systr m with reference input disturbance substituting equation get solving this last note response when both distur bance are present find let similarly shows inputs outputs derive cl deriving assume zero vice versa...