Runge-Kutta matlab library
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Hi everybody, I am currently trying to understand this code that I have taken from this research paper: https://waterloouav.files.wordpress.com/2010/01/parachute.pdf
I have 2 questions:
1) I am trying to figure out if RK4_TI is a matlab library or did he manually write his own runge katta code as i couldnt find it in his research paper.
2) i realised he didnt assign the value of T*step to a variable, but i am unsure on what i should assign it to instead.
Hope somebody can give me some advice on this! Thank you.
clear;
T = 0.01;
end_time = 10;
num_of_steps = floor(end_time / T);
u=cell(1,num_of_steps);
x=cell(1,num_of_steps);
x{1} = [0; 0; 0; 0; 0; 0; 7; 0; 2; 0; 0; 0];
for count = 1:num_of_steps
u{count} = zeros(2,1);
end
disp = 0;
for step = 1:num_of_steps
x{step+1}=RK4_TI(@six_dof_parachute,T,x{step},u{step});
if disp == 100
disp = 0;
T*step
else
disp = disp + 1;
end
end
six_dof_plot(x,u,num_of_steps,T)
4 Commenti
Walter Roberson
il 22 Apr 2022
The only other reference to RK4_TI that I can seem to find is https://people.math.sc.edu/Burkardt/f_src/stochastic_rk/stochastic_rk.html in the context of Stochastic Differential Equations . However, the paper you are looking at does not appear to be using Stochastic Differential Equations.
Risposte (1)
Benjamin Thompson
il 22 Apr 2022
ode45 is the closest Runge Kutta implementation for what you are describing. Type "doc ode45" for details.
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