i am not getting chaotic plot because of warning

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nune pratyusha
nune pratyusha 2022-2-14
回答： Benjamin Thompson 2022-2-14
function dx = compactchua(t,x)
dx=zeros(4,1);
dx(1) = -(1/(8200*47*1e-9))*x(2);
dx(2) = (((x(3)-x(2))/2000) -(x(4).^3*4.7e3+1e3))/6.8e-9;
dx(3) = ((x(2)-x(3))/2000 - x(4))/68e-9;
dx(4) = (x(3))/(22*10^-9);
end
[t,x] = ode15s(@compactchua,[0 5e-7],[0 12.24e-3 12.24e-3 1.7]);
plot(x(:,2),x(:,3));
error
Warning: Failure at t=6.943264e-08. Unable to meet integration tolerances without reducing the step size below
the smallest value allowed (2.117582e-22) at time t.
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回答（1 个）

Benjamin Thompson
Benjamin Thompson 2022-2-14
Chaotic systems have behavior that is not well described using continuous and differentiable functions right? So a solver that attempts to reduce step size until it finds continuous and predictable differentiation results is probably not going to work there. Have you tried one of the other solvers to see if results are better?

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