www.gusucode.com > 直流电机拖动系统simulink仿真源码程序 > code/exam2_3.m
clear x0=[620 10 70]; tspan=[0,30]; [t,x]=ode45('fun2_3',tspan,x0); plot(t,x(:,1),'k',t,x(:,2),'k--',t,x(:,3),'k:'); xlabel('time(天) t0=0,tf=30'); ylabel('x(人);x1(0)=620,x2(0)=10;x3(0)=70'); legend('x1','x2','x3'); grid;