www.gusucode.com > control 案例程序 matlab源码代码 > control/CheckPassivityOfDynamicSystemExample.m

    %% Check Passivity of Dynamic System
% Test whether the following transfer function is passive:
%%
% 
% $$G\left( s \right) = \frac{{s + 1}}{{s + 2}}.$$
% 
%%
G = tf([1,1],[1,2]);
[pf,R] = isPassive(G)
%%
% |pf = 1| indicates that |G| is passive.  |R = 0.3333| indicates that |R|
% has a relative excess of passivity.