Hi All,(adsbygoogle = window.adsbygoogle || []).push({});

for a Van Der Pol dyanmical sysetm , governed by the eqautions

x' = a * (x - 0.3 x ^3 ) - y

y' = x

i read at http://www.scholarpedia.org/article/Van_der_Pol_oscillator that when the system is away from the curve y=x−x3/3 , "a relation |x˙| >> |y˙|=O(1/ϵ) is obtained from equations (2) and (3). Therefore, the system moves quickly in the horizontal direction. When the system enters the region where |x−x3/3−y|=O(1/ϵ2) , x˙ and y˙ are comparable because both of them are O(1/ϵ)".

I really do not get this entirely.`I am unsure of how the relationship involving the infinitesimals are derived. How are these realtionship justified?

Can anybody please try to give us a hint? Thank you so much

Muzialis

**Physics Forums - The Fusion of Science and Community**

# Van Der Pol dynamics

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Van Der Pol dynamics

Loading...

**Physics Forums - The Fusion of Science and Community**