engineering recuitment MAHATRANSCO AE Electrical Mock Test Control Systems Signal Flow Graph and Block Diagram Mason's Gain Formula
The block diagram of a feedback control system is shown in the figure. The overall closed – loop gain G of the system is
1
\({\rm{G}} = \frac{{{{\rm{G}}_1}{{\rm{G}}_2}}}{{1 + {{\rm{G}}_1}{{\rm{H}}_1}}}\)
2
\({\rm{G}} = \frac{{{{\rm{G}}_1}{{\rm{G}}_2}}}{{1 + {{\rm{G}}_1}{{\rm{G}}_2} + {{\rm{G}}_1}{{\rm{H}}_1}}}\)
3
\({\rm{G}} = \frac{{{{\rm{G}}_1}{{\rm{G}}_2}}}{{1 + {{\rm{G}}_1}{{\rm{G}}_2}{{\rm{H}}_1}}}\)
4
\({\rm{G}} = \frac{{{{\rm{G}}_1}{{\rm{G}}_2}}}{{1 + {{\rm{G}}_1}{{\rm{G}}_2} + {{\rm{G}}_1}{{\rm{G}}_2}{{\rm{H}}_1}}}\)
5
\({\rm{G}} = \frac{{{{\rm{G}}_1}{{\rm{G}}_2}}}{{1 + {{\rm{G}}_1}{{\rm{G}}_2} + {{\rm{G}}_2}{{\rm{H}}_1}}}\)