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Marius


ETH Zürich

Active since 2015

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Answered
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...

nästan 8 år ago | 0

Answered
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?...

nästan 8 år 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...

nästan 8 år ago | 1 answer | 0

1

answer

Question


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 ...

nästan 8 år ago | 0 answers | 0

0

answers

Question


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...

ungefär 8 år ago | 1 answer | 0

1

answer

Question


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: ...

ungefär 8 år ago | 1 answer | 0

1

answer

Answered
Mass 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...

ungefär 8 år 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 = ...

ungefär 8 år ago | 4 answers | 0

4

answers

Question


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...

ungefär 8 år ago | 1 answer | 0

1

answer

Question


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...

ungefär 8 år ago | 3 answers | 0

3

answers

Question


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...

ungefär 8 år ago | 0 answers | 0

0

answers

Question


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. ...

ungefär 8 år ago | 2 answers | 0

2

answers

Question


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...

nästan 9 år ago | 2 answers | 0

2

answers