System of 2 second order coupled differential equations with Mathcad
System of 2 second order coupled differential equations with Mathcad
(OP)
Hello,
Using Mathcad to solve a system of 2 second order coupled differential equations, I issue a problem with the "D" function (used to solve a diffrentiel equation) when there is more than 1 parameter inside.
Here is the system :

I convert this system to have only first order equations :

Then, I can't find other way than making a D matrix with my parameters :

Then, I issue my problem : its seems that mathcad refuse to have a D function with more than 1 parameter :

So, if anybody here can find a way to solve this system, please let me know !
Regards
Kevin
Using Mathcad to solve a system of 2 second order coupled differential equations, I issue a problem with the "D" function (used to solve a diffrentiel equation) when there is more than 1 parameter inside.
Here is the system :

I convert this system to have only first order equations :

Then, I can't find other way than making a D matrix with my parameters :

Then, I issue my problem : its seems that mathcad refuse to have a D function with more than 1 parameter :

So, if anybody here can find a way to solve this system, please let me know !
Regards
Kevin





RE: System of 2 second order coupled differential equations with Mathcad
You can also incorporate the parameters A, B and K into the DE, setting their derivatives to be 0.
Read the Help on rkfixed for further information.
RE: System of 2 second order coupled differential equations with Mathcad
Scroll down to get to the D array. There is a lot of extra stuff.
http://www.deltamotion.com/peter/Mathcad/TwoTanks/...'s%20two%20tanks%20Cascade.pdf
Peter Nachtwey
Delta Computer Systems
http://www.deltamotion.com