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Hossein


TU Braunschweig

Last seen: meer dan 4 jaar ago |  Active since 2014

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Numerical integral with syms variables
Hi everybody, I am trying to make numerical integral from a function which consists of several symbolic. It's clear that I want...

ongeveer 5 jaar ago | 1 answer | 0

1

answer

Question


writing a matrix in a .xml data
Hi, I am trying to import a pressure profile from my calculations in Matlab to Ansys. The problem begins to appear when I need ...

ongeveer 7 jaar ago | 1 answer | 0

1

answer

Question


Symbolic matrix problem, how to take out the arrays of a symbolic matrix?
Hi, I have a matrix 5X1 as a Symfun data, where I want to take out the 5 elements seperately and do more calculations on them...

meer dan 7 jaar ago | 1 answer | 0

1

answer

Question


Problem adding two symbolic functions
Hi, I have a problem adding two fuctions with deriatives of symbolic variables. The main purpose ist to solve a differential eq...

meer dan 7 jaar ago | 2 answers | 0

2

answers

Question


Calculating the length of a curve
Hi everyone, can anybody tell me how to calculate the length of a curve being defined in polar coordinate system using follow...

bijna 8 jaar ago | 0 answers | 0

0

answers

Question


Out of memory problem using ODE solver
Hi everyone, I have the problem of out of memory in a time domain stiff simulation using ODE15s. What I have tried to solve t...

bijna 9 jaar ago | 1 answer | 0

1

answer

Question


Time normalization in FFT!
Hi everyone, I'm trying to take a FFt from a time signal being resulted from an ODE procedure for simulating an imbalance res...

bijna 9 jaar ago | 1 answer | 0

1

answer

Question


FFT from a time signal with unequal time increment
Hi everyone, I am trying to take a FFT from a simulated time signal, which is resulted from an ODE simulation. The problem is t...

bijna 9 jaar ago | 1 answer | 0

1

answer

Question


3D Plot from finite 2D Plots in each section!
Hi everyone, I am searching for a solution to create a 3D plot to show the whole distribution of load over a cylinder using fin...

ongeveer 9 jaar ago | 1 answer | 0

1

answer

Question


Generating a results report possible?
Hi everyone, is there any comfortable solution to print different results as a combination of different figures and tables in...

ongeveer 9 jaar ago | 1 answer | 0

1

answer

Question


Matlab command history question
Hi everyone, is there any way to recall a command of a long time ago fast and without searching back day by day or is there a...

meer dan 9 jaar ago | 3 answers | 1

3

answers

Question


Is there any way to calculate the eigenvalues of Jacobian matrix in any non-stiff ODE solver like ode113?
Hi everybody, Is there any way to calculate the eigenvalues of Jacobian matrix in any non-stiff ODE solver like ode113? ma...

meer dan 9 jaar ago | 1 answer | 0

1

answer

Question


a well-known problem: Out of Memory during the ode process!
Hi everyone, I'm trying to run a model using ode113 with 5252 state variables, the solver works pretty well in predefined tim...

meer dan 9 jaar ago | 1 answer | 0

1

answer

Question


Update the variables in ODE routines?
Hi everyone, I have a question concerning the ODE routines. I should model a complicated nonlinear dynamic system in time dom...

meer dan 9 jaar ago | 1 answer | 0

1

answer

Question


solving a ODE using ode45 or etc. with certain number of timestepping
Hi everybody, I want to solve an ODE using Adams-Bashforth 4th order method which needs the initial values of previous steps ...

meer dan 9 jaar ago | 2 answers | 0

2

answers

Question


best way to access past outputs within a function written for ode routines (like ode45)?
Hi everyone, any suggestion to save past valid outputs within a function written for ode routines considering this fact that od...

meer dan 9 jaar ago | 0 answers | 0

0

answers

Question


Adaptive time stepping for Adam Bashforth methode
Hi everyone, can anybody give me a suggestion for coding a alghorithm with the aim of optimal time stepping while using Adam ...

meer dan 9 jaar ago | 1 answer | 0

1

answer

Question


problem using ODE functions during simulation a nonlinear motion! please help!
Hi Everybody, I am trying to simulate the equation of motion for a rotor-bearing system in time-domain. the quations to solve...

meer dan 9 jaar ago | 0 answers | 0

0

answers

Answered
finding the roots of a nonlinear equation....faster method than the Newton-Raphson method?
u've right buddy seems there is no main solution but I'm thinking of a trick or something like that. The things that I know are ...

bijna 10 jaar ago | 0

Question


finding the roots of a nonlinear equation....faster method than the Newton-Raphson method?
Hi everyone, I was wondering if there is any other way to find the roots of a nonlinear equation numerically which can be fas...

bijna 10 jaar ago | 2 answers | 0

2

answers

Question


Simulink Error: LINK1248: image size exceeds maximum allowable size, what should be done?
Hi everyone, I should build a matrix with the size of 4851 X 4851 in my simulink model which needs much more memory size and ...

meer dan 10 jaar ago | 0 answers | 0

0

answers

Question


same models in MATLAB and Simulink but different results! what would you do in this case?
Hi everyone, I am building a model in simulink which I have done it in MATLAB before. In one specific part of the model a PDE...

meer dan 10 jaar ago | 0 answers | 0

0

answers

Question


Switch problem in Simulink!
Hi everybody, I work with a Simulink model describing the behaviour of some kind of mechanical bearing. In latest step I'm us...

meer dan 10 jaar ago | 0 answers | 0

0

answers

Question


Different results from Matlab and Simulink from a same Iteration process
Hi eveyone, I'm trying to solve a PDE in Simulink which is already done by me in MATLAB code through the double-iteration for...

meer dan 10 jaar ago | 0 answers | 0

0

answers

Question


how to define iteration region by simulink?
Hi every body, I'm trying to rebuild a modell in Simulink which is already done as a MATLAB code. In a specific part of this ...

meer dan 10 jaar ago | 0 answers | 0

0

answers

Question


Fix point tool runing error by Simulink
Hi everyone, I have a Simulinik model that uses Cos block (a fix point tool). Previously it runs fine but it can't run anymor...

meer dan 10 jaar ago | 1 answer | 0

1

answer

Answered
Help Help Help...Problem with Matlab-Function Block in Simulink!
im still having the problem...any idea?

meer dan 10 jaar ago | 0

Question


Help Help Help...Problem with Matlab-Function Block in Simulink!
Hi everyone, im having trouble while using the Matlab fcn block in my Simulink model, recieving the Error: CRL: "ANSI_C" ca...

meer dan 10 jaar ago | 2 answers | 0

2

answers

Answered
Help Help Help...Problem with Matlab-Function Block in Simulink!
my Mex properties: Name: 'Microsoft Windows SDK 7.1 (C)' Manufacturer: 'Microsoft' Language: 'C' V...

meer dan 10 jaar ago | 0

Question


iteration in Simulink for solving Reynolds equation
Hi everybody, i have already written a code for modelling some kind of bearing in MATLAB and now i want to re-build it in sim...

meer dan 10 jaar ago | 0 answers | 0

0

answers

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