Package org.hipparchus.migration.ode

Interface SecondOrderDifferentialEquations

All Superinterfaces:
SecondOrderODE
@Deprecated public interface SecondOrderDifferentialEquations extends SecondOrderODE
Deprecated.
as of 1.0, replaced with SecondOrderODE
This interface represents a second order differential equations set.

This interface should be implemented by all real second order differential equation problems before they can be handled by the 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 Type
    Method
    Description
    default double[]
    computeSecondDerivatives(double t, double[] y, double[] yDot)
    Deprecated.
    Get the current time derivative of the state vector.
    void
    computeSecondDerivatives(double t, double[] y, double[] yDot, double[] yDDot)
    Deprecated.
    Get the current time derivative of the state vector.

    Methods inherited from interface org.hipparchus.ode.SecondOrderODE

    getDimension

  • Method Details

    • computeSecondDerivatives

      default double[] computeSecondDerivatives(double t, double[] y, double[] yDot)
      Deprecated.
      Get the current time derivative of the state vector.
      Specified by:
      computeSecondDerivatives in interface SecondOrderODE
      Parameters:
      t - current value of the independent time variable
      y - array containing the current value of the state vector
      yDot - array containing the current value of the first derivative of the state vector
      Returns:
      second time derivative of the state vector

    • computeSecondDerivatives

      void computeSecondDerivatives(double t, double[] y, double[] yDot, double[] yDDot)
      Deprecated.
      Get the current time derivative of the state vector.
      Parameters:
      t - current value of the independent time variable
      y - array containing the current value of the state vector
      yDot - array containing the current value of the first derivative of the state vector
      yDDot - placeholder array where to put the second time derivative of the state vector