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Mass Matrix SWITCH Problem in Matlab
Now it gives me the error: Error using odearguments (line 92) @(T,Y)ROCKING_DGL(T,Y,TIME_R,DT,UG,VG,FSSFUN,SYS...
8 years ago | 0
Mass Matrix SWITCH Problem in Matlab
Is there another possibility to do this? Is it true that now it is substituting the variables in each step of the ODE15s solver?...
8 years ago | 0
Question
Preconditioner for non linear mass matrix
I have to solve an ODE system of the form: M(y,t)*dydt = F(y,t) The problem is, that it is very ill conditioned. I used...
8 years ago | 1 answer | 0
1
answerQuestion
Problems with Preconditioning for ODE Solver
I'm trying to solve a dynamic FEM Problem for a 3D cantilever beam with 2 Elements. I enterred the Input in mm, N etc. Now when ...
8 years ago | 0 answers | 0
0
answersQuestion
How to Compute MvPattern?
I'm trying to compute the MvPattern Sparsity Matrix S for the use in ODE15s solver because my Mass Matrix M(t,y) is strongly dep...
8 years ago | 1 answer | 0
1
answerQuestion
Provide Jacobian Matrix for ODE15s solver
I'm using the ODE15s solver and want to ad the input for a jacobian matrix. The following file calculates the jacobi matrix J: ...
8 years ago | 1 answer | 0
1
answerMass Matrix SWITCH Problem in Matlab
Thank you for your answer! 1)We would need to see how you initialized your flag variable to figure out why you are getting th...
8 years ago | 0
Question
Mass Matrix SWITCH Problem in Matlab
I'm having a problem with my ODE in Matlab. The code to start the ODE solver is the following: refine = 4; options = ...
8 years ago | 4 answers | 0
4
answersQuestion
Problem with Event Function
I created a function file which contains my ODE which has to be solved. In each step a value is calculated: i_up = 0 or 1. If it...
8 years ago | 1 answer | 0
1
answerQuestion
Problems with strrep: y(1)0 instead of y(10)
I'm having a problem replacing some strings with strrep. I have to replace some strings y1,y2,y3,y4 etc with y(1),y(2),y(3),y...
8 years ago | 3 answers | 0
3
answersQuestion
Convert symbolic system of differential Equations to numerical for ODE45
Hi all. I have to solve a FEM Problem. For this I created a function which computes the needed matrices and so the set of differ...
8 years ago | 0 answers | 0
0
answersQuestion
How to change the ODE to be solved for different ranges in ODE45
Hi I have to solve a dynamics problem with MATLAB. I have two differential equations which are only valid for positive resp. ...
8 years ago | 2 answers | 0
2
answersQuestion
Real time plot of vibration data
Hi everybody For a course at the university I need Matlab to compute a realtime plot of vibration data. Below you find the in...
9 years ago | 2 answers | 0