Interface SecondOrderODE
 All Known Subinterfaces:
SecondOrderDifferentialEquations
This interface should be implemented by all real second order
differential equation problems before they can be handled by the
integrators converter to first order
.
A second order differential equations problem, as seen by an
integrator is the second time derivative d2Y/dt^2
of a
state vector Y
, both being one dimensional
arrays. From the integrator point of view, this derivative depends
only on the current time t
, on the state vector
Y
and on the first time derivative of the state
vector.
For real problems, the derivative depends also on parameters that do not belong to the state vector (dynamical model constants for example). These constants are completely outside of the scope of this interface, the classes that implement it are allowed to handle them as they want.

Method Summary
Modifier and TypeMethodDescriptiondouble[]
computeSecondDerivatives
(double t, double[] y, double[] yDot) Get the current time derivative of the state vector.int
Get the dimension of the problem.

Method Details

getDimension
int getDimension()Get the dimension of the problem. Returns:
 dimension of the problem

computeSecondDerivatives
double[] computeSecondDerivatives(double t, double[] y, double[] yDot) Get the current time derivative of the state vector. Parameters:
t
 current value of the independent time variabley
 array containing the current value of the state vectoryDot
 array containing the current value of the first derivative of the state vector Returns:
 second time derivative of the state vector
