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Numerical integration of an ODE?

조회 수: 43(최근 30일)
답변: Priyanka Rai 2020년 11월 18일
Hey! I'm trying to integrate the following 2nd order ODE:
from time t=0 to any random time, say t=50 seconds
ω and A are constants.
I need to integrate the above equation twice, numerically. Any idea how i can do this and what method i'll be using?
  댓글 수: 2
riccardo 2020년 11월 16일
Why numerically ?
If A and w are constants, x(t) = A*sin(w*t) is surely the primitive (plus initial conditions if not zero).

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Priyanka Rai
Priyanka Rai 2020년 11월 18일
To be able to integrate 2nd Order ODE numerically you can use the following methods, based on your use case:
  1. If function f is to be integrated, then for definite integral you can use
int(f, a, b)
2. Numerically evaluate double integral
q = integral2(fun,xmin,xmax,ymin,ymax)
approximates the integral of the function z = fun(x,y) over the planar region xminxxmax and ymin(x)yymax(x).
Numerical integration functions can approximate the value of an integral whether or not the functional expression is known.When you know how to evaluate the function, you can use integral to calculate integrals with specified bounds.

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