how to solve this equation in matlab? Please help

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Prince
Prince 2016-2-23
评论： Torsten 2016-2-25
please help me for solving this equation in matlab , thank you all , see the attached file.

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采纳的回答

Torsten
Torsten 2016-2-23
Use MATLAB's bvp4c to solve
y1' = y2
y2' = a*sin(y1)*cos(y1)
(a=V^2/V_th^2*Pi^2/L^2)
with boundary conditions
y1(0.01)=Pi/2
y1(L)=Pi/2
Best wishes
Torsten.
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Prince
Prince 2016-2-25
Hi , can you please check the mfile i have attached it for the this equation?, and also how can i plot the equation? thanks a lot for your kind help.
Torsten
Torsten 2016-2-25
To plot, add
x = linspace(0,L,20);
y = deval(sol,x);
plot(x,y(1,:));
after the line
sol=bvp4c(@(x,y)ode(x,y,a),@bc,solinit);
Best wishes
Torsten.

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更多回答（1 个）

Explorer
Explorer 2016-2-23
编辑：Explorer 2016-2-23
L =0.2;
K11 =4.8e-12;
E0 =8.85e-12;
delta_E =0.78;
Vth = (pi/L) * sqrt(K11/(E0*delta_E))

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