JSBSim Flight Dynamics Model 1.2.3 (07 Jun 2025)
An Open Source Flight Dynamics and Control Software Library in C++
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Public Member Functions | List of all members
FGRKFehlberg Class Reference

Detailed Description

Runge-Kutta-Fehlberg method.

This is a semi adaptive implementation of rkf - the interval only shrinks. As a result interval calculations remain trivial, but sometimes too many calculations are performed. Rationale: this code is not meant to be a universal pain-reliever for ode's. Rather it provides some safety if the number of intervals is set too low, or the problem function behaves a bit nasty in rare conditions.

Definition at line 156 of file FGRungeKutta.h.

#include <FGRungeKutta.h>

+ Inheritance diagram for FGRKFehlberg:
+ Collaboration diagram for FGRKFehlberg:

Public Member Functions

double getEpsilon ()
 
int getShrinkAvail ()
 
void setEpsilon (double e)
 
void setShrinkAvail (int s)
 
- Public Member Functions inherited from FGRungeKutta
void clearStatus ()
 
double evolve (double y_0, FGRungeKuttaProblem *pf)
 
double getError ()
 
int getIterations ()
 
int getStatus ()
 
double getXEnd ()
 
int init (double x_start, double x_end, int intervals=4)
 
void setTrace (bool t)
 

Additional Inherited Members

- Public Types inherited from FGRungeKutta
enum  eStates {
  eNoError =0 , eMathError =1 , eFaultyInit =2 , eEvolve =4 ,
  eUnknown =8
}
 
- Protected Attributes inherited from FGRungeKutta
double err
 
double h
 
double h05
 
FGRungeKuttaProblem * pfo
 

Constructor & Destructor Documentation

◆ FGRKFehlberg()

FGRKFehlberg ( )
inline

Definition at line 159 of file FGRungeKutta.h.

159: shrink_avail(4), epsilon(1e-12) { };

◆ ~FGRKFehlberg()

~FGRKFehlberg ( )
virtual

Definition at line 163 of file FGRungeKutta.cpp.

163{ };

Member Function Documentation

◆ getEpsilon()

double getEpsilon ( )
inline

Definition at line 161 of file FGRungeKutta.h.

161{ return epsilon; }

◆ getShrinkAvail()

int getShrinkAvail ( )
inline

Definition at line 162 of file FGRungeKutta.h.

162{ return shrink_avail; }

◆ setEpsilon()

void setEpsilon ( double  e)
inline

Definition at line 163 of file FGRungeKutta.h.

163{ epsilon = e; }

◆ setShrinkAvail()

void setShrinkAvail ( int  s)
inline

Definition at line 164 of file FGRungeKutta.h.

164{ shrink_avail = s; }
The documentation for this class was generated from the following files: