基于MatLab的线性网络及其灵敏度分析

来源期刊：中南大学学报(自然科学版)2004年第4期

论文作者：王恒升 何清华

文章页码：622 - 627

关键词：线性网络;灵敏度;信号流图

Key words：linear network; sensitivity; signal flow graph

摘    要：将线性电路网络转换成信号流图,以系统环节的信息变换、环节间的信息传递和互连方式来代替实际的电路网络,消除电流的负载效应,明确信号间的运算关系。针对网络分析中的灵敏度问题,通过附加灵敏电源点的方式,推出灵敏度计算关系。根据MatLab的数值计算与符号运算功能,给出具体算例的计算模型,得到电路参数变化的全程灵敏度曲线,验证所述方法的有效性。

Abstract: By transferring the circuit network to signal flow graph, the relation and handling between signals (not the actual electric variables) were presented explicitly without considering the loading effect of the electricity. The sensitivity formula was derived by mean of attaching a sensitive source point to the parameter shifting. The computation becomes easier by using MatLab system toolbox, such as the symbol operations, numerical algorithms and graph functions. The MatLab model was set up and the sensitivity curve was obtained according to the examples given for proving the effectiveness of the methods presented.