MATLAB Answers

Solving BVP for DAE in Matlab

Benjamin Larin 님이 질문을 제출함. 3 Sep 2019
최근 활동 Torsten 님이 댓글을 추가함. 3 Sep 2019
How do I solve boundary value problems (BVP) for differential algebraic equation systems (DAE) in Matlab?
bvp4c and bvp5c can only handle differential equations. ode15i can handle DAE, but only initial value problems (IVP).
Transformation of the DAE into a differential equations system is too costly or impossible.
Also, I do not want to write my own BVP numerical routine that uses matlabs differential equation solvers (we use Matlab because when we do not want to write our own routines, right?).
Currently I am using bvp4c/bvp5c and the function containing the differential equations calls another functions that solved the algebraic (non-differential) subsystem before calculating the rhs of the differential equations. However, this seems highly unstable and inefficient to me.
Any recommendations or experience on solving BVP for DAE in Matlab is highly welcome.

  댓글 수: 0

로그인 to comment.

답변 수: 1

Torsten 님의 답변 3 Sep 2019
 채택된 답변

  댓글 수: 4

표시 이전 댓글 수: 1
Madhan, the explanation in your link is outdated. The option "Request an enhancement" is not available anymore. I have just made a regular technical request.
Ok, an "integrated" solver like COLDAE might perform better and more stable, but usually, your method of solving the differential and algebraic parts separately is a reasonable way to go.

로그인 to comment.

Translated by