RK4 Solver Issue: Shoot the Moon with C Program

  • Thread starter Thread starter Illuminati
  • Start date Start date
  • Tags Tags
    Rk4
AI Thread Summary
A user is developing a 4th order Runge-Kutta program in C to simulate a spacecraft's trajectory to the moon but is encountering issues with the RK4 implementation. The user has shared the code file, specifically recommending the "shoot_the_moon3.c" version, which includes a .plt file for generating output data in .png format. The spacecraft is intended to follow a circular orbit but is instead exhibiting behavior akin to a massed spring. The user suspects that the problem may be related to an initial value issue and is seeking assistance from those more experienced in C programming to identify the errors in the code.
Illuminati
Messages
5
Reaction score
0
Hey Folks,

So I've been making an 4th order Runge-Kutta program for finding a way to shoot the moon with a spacecraft . However for some reason the RK4 part of the program does not work and I cannot figure it out.

I've written it in C and attached the file. If someone who is more well versed in C could take a look at it and let me know what I'm screwing up I would be greatly appreciative.

Thanks!

Edit: I've attached a couple different methods to this post. If viewing try using shoot_the_moon3.c, it should have a working .plt file to output a .png of the data
 

Attachments

Last edited:
Technology news on Phys.org
I suppose I should add that the spacecraft is supposed to have some kind of circular orbit, instead it acts more like a massed spring

it might be an initial value problem
 

Thread 'Learning Assembly and computer architecture for x86'

Dear Peeps I have posted a few questions about programing on this sectio of the PF forum. I want to ask you veterans how you folks learn program in assembly and about computer architecture for the x86 family. In addition to finish learning C, I am also reading the book From bits to Gates to C and Beyond. In the book, it uses the mini LC3 assembly language. I also have books on assembly programming and computer architecture. The few famous ones i have are Computer Organization and...
View full post »

Thread 'Learning data structures and algorithms in different programming languages'

I have a quick questions. I am going through a book on C programming on my own. Afterwards, I plan to go through something call data structures and algorithms on my own also in C. I also need to learn C++, Matlab and for personal interest Haskell. For the two topic of data structures and algorithms, I understand there are standard ones across all programming languages. After learning it through C, what would be the biggest issue when trying to implement the same data...
View full post »

Similar threads

I Runge-Kutta 4 w/ some sugar on the top: How to do error approximation?
2
Replies
65
Views
6K
Help printing to a Zebra label printer from Tcl or C please
Replies
2
Views
3K
C/C++ C++ Program Suddenly Ends after Reading Huge Data
Replies
22
Views
4K
Fortran Fortran external functions vs subroutines
Replies
8
Views
4K
What is the semantic error in my code
Replies
8
Views
2K
I Simulating Binary Systems with RK4 in C
Replies
4
Views
2K
Issues with Apollo 11 TLI Simulation – Discrepancies in Return Orbit
Replies
3
Views
1K
Fortran Fortran programming help arrays and arithmetic
Replies
13
Views
4K
C/C++ [C++] What's wrong with my program?
Replies
17
Views
2K
C/C++ Running a Fortran 77 program in a C++ enviorment/program
Replies
2
Views
12K

Hot Threads

Recent Insights

Back
Top