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本文扼要地综述了国外求多变量系统信号流图的四种计算方法:简化规则计算法;返还回路法;最优拓扑法;最优拓扑树法。并附有计算实例。这些方法都具有实际工程应用价值。众所周知,梅逊增益公式只适用于单输入,单输出系统。梅逊公式运用的信号流图称为标量信号流图,它对多输入、多输出系统是不适用的。为了求得多输入、多输出系统的传输相应地出现了所谓的矩阵
This article briefly summarizes four foreign multi-variable system signal flow graph calculation methods: simplified rule calculation method; return loop method; optimal topology method; optimal topology tree method. And with a calculation example. All of these methods have practical application value. As we all know, Mason gain formula only applies to single-input, single-output system. The signal flow graph used by the Mason formula is called a scalar signal flow graph and is not suitable for multi-input, multi-output systems. In order to find the multi-input, multi-output system transmission corresponding to the emergence of the so-called matrix