2015/11/14 ME369-系统模型、分析与控制 7.2频率特性图 School of Mechanical Engineering ME369-lecture 7.2 Shanghai Jiao Tong University Fall 2015 伯德图/波德图(Bode diagrams)定义 -对数幅频图(Magnitude Plot) L(@)=201g|G(j@)|vs logo@ 对数相频图(Phase Plot) p(o)=∠Gjo)vs log1oo 20 150 decade (dec) 40 一个十倍频程 0 02 04 0.60.8 1 0 10e 0 个 一个十倍颜程 倍频程 倍频程 150 60 octave School of Mechanical Engineering ME369-lecture 7.2 Shanghai Jiao Tong University Fall 2015 12015/11/14 1 BE315-Lecture 7.2 Fall 2011 ME369-lecture 7.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 7.2 频率特性图 ME369-系统模型、分析与控制 BE315-Lecture 7.2 Fall 2011 ME369-lecture 7.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 伯德图/波德图（Bode diagrams ）定义 decade (dec) L G j ( ) 20lg | ( ) |       ( ) ( )  G j VS 10 log  --对数幅频图(Magnitude Plot ) VS 10 log  --对数相频图(Phase Plot ） octave