Linearization of nonlinear non homogenous ODE

  • Thread starter mike79
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  • #1
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Hi everybody,
could anyone help me in the linearization of the following non linear non-homogeneous ODE?

A*dy/dt+B*y^(4)=C

where A, B and C are constants. y is a function of t. is it possible to reduce this equation to a Riccati equation? do you know any analytical, approximate or not, methods to solve the equation?

thanks in advance
 

Answers and Replies

  • #2
Defennder
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Just to be clear, is this the DE:

[tex]A \frac{dy}{dt} + By^4 = C[/tex]

If so, then note that you can easily express it as a http://en.wikipedia.org/wiki/Bernoulli_differential_equation" [Broken]and solve it directly without having to approximate it.
 
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  • #3
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the DE is right...the BERNOULLI equation is homogeneous and I actually can't tarnsform my equation in a Bernoulli one. can you suggest me how to transform it?
 
  • #4
Defennder
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I just had a second look at the DE and realised that there is no need to solve it as a Bernoulli DE. The original DE is separable, though the resulting integral is a little tough to integrate, but certainly doable.
 
  • #5
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i have found in literature the Chini equation, which is similar to the equation I'm trying to solve. unfortunately i can't found the solution. can everyone help me, please?
 
  • #6
HallsofIvy
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Defennder has already pointed out that this equation is separable:
[tex]/frac{Ady}{C- By^4}= dt[/tex]
Integrate both sides, using "partial fractions" on the left.
 

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