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    • 15. 发明公开
    • Multiple loop feedback systems
    • 多环路反馈系统
    • EP0188866A3
    • 1988-06-22
    • EP85305224
    • 1985-07-23
    • Miller, Gary
    • Miller, Gary
    • G05B11/06G05F01/575
    • G05B11/06G05F1/575H03F3/347
    • A multiple loop feedback system arrangement as typically shown in the diagram which may be used to construct a control system, electronic amplifier or electronic regulator. The input signal combiners G1 (s) and G2(s) are selected to be either summing, summing inverting or differential and G3(s) is selected to be either inveting or noninverting so that the signal loop formed by G1 (s), and G2(s) has a net phase shift of zero degrees and the signal loop formed by G1 (s), G3(s), B(s) and G2(s) has a net phase shift of 180 degrees. By setting the gain of the zero phase shift loop to unity a balanced condition occurs where the error signals generated in G3(s) do not appear at the output Qo. Other embodiments of this invention include an arrangement where the input of G3(s) is coupled to the output of G2(s).
    • 通常在图中示出的可用于构建控制系统,电子放大器或电子调节器的多回路反馈系统布置。 输入信号组合器G1(s)和G2(s)被选择为求和,求和反相或差分,并且G3(s)被选择为入侵或同相,使得由G1(s)形成的信号环和 G2(s)具有0度的净相移,并且由G1(s),G3(s),B(s)和G2(s)形成的信号环具有180度的净相移。 通过将零相移环路的增益设置为1,发生G3(s)中生成的误差信号不出现在输出端Qo的平衡条件。 本发明的其它实施例包括其中G3(s)的输入耦合到G2的输出的布置。