I have the variable ydd (y double dot) that I want to integrate twice to get the variable y.
The formula of ydd is:
ydd = -tan(phi).*(zdd + gravity)
where phi, zdd are vectors of size (1xn) containing different angles and accelerations at each time instant.
And, gravity is also a vector of size (1xn) containing a constant value (which is 9.81) repeated n times.
So, ydd is also a (1xn) vector containing different accelerations at each time instant.
How can I use ode45 to integrate ydd twice?
Thank you for taking the time to read my question.