**simulation of a mechanism...**Hello,
I am studying Mechanical Engineering and i have to solve and simulate
a specific mechanism. Actually, i solved the mechanism and the m file
is below! But unfortunately i can't simulate it.
teta2 is an angle which is given by me and is turning from 1 to 360
degrees and the program calculates the necessary results according to
that angle. Lenghts are known. All i have to do is make the joint
points and draw them. But i have no clue how to do it! If you can't
find the solution please least give me the directions how to draw a
line frow known 2 points.
ps: This program includes ju...

**mechanical system simulation**Dear Ptolemy users,
I recently installed Ptolemy. I am interested in the simulation of
electromechanical systems.
I started by modelling the equations of a damped mechanical oscillator
subject to an external force, which I modelled using a CurrentTime actor
and an Expression actor, in my case an exponential impulse. This example
works great.
Now, I would like to substitute the exponential impulse by a more
complex, arbitrary, waveform of the external force. My idea is to use a
piece-wise linear waveform that I could modify to resemble a realistic
mechanical impulse.
C...

**mechanic arm simulation**Hi,
as homework, I have to simulate a mechanic arm that pulls up a weight
from 0 to 45 degrees, piloted by a DC motor but I have not idea where to
start from.
I read some of the simulink documentation, but it didn't help much.
Does anyone have some good documentation to point me to, so I can get
started with this project?
Thanks in advance for you help.
Salvo
...

**Computer for Mechanical Dynamics Simulators**Our company is in the process of adopting Solidworks. We are about
to purchase some new computers for this with the following specs;
-Dell optiPlex GX280 SMT
with Int Broadcom=AE GbNIC Intel=AE Pentium=AE 4
Processor 550 (3.40GHz, 1M, 800MHz FSB) 34GT
-Memory; 2.0GB DDR2 Non-ECC SDRAM,533MHz, (2DIMM) 2G2N52
-video; NVIDIA QUADRO FX 1300 with 128meg DDR memory on PCI express
We are also strongly considering using Cosmos Motion in the future. I
recall reading that there is no significant benefit to using
dual-processors for Solidworks. Therefore the money is better put
towards more and f...

**2d creature locomotion simulation**Hello,
I want to locomote artificial creatures that are made of joints and
links (their quantity may vary). The worId of the creatures is 2d, for
simplicity and convenience to plot. I have searched the net so long,
but I could not find any way or any method that performs this task.
There are many papers and sources telling that they've achieved this by
calculating torques (and so on), but unfortunately none of them tell
how they achieved.
Guess the creature is at origin and wants to reach the target
coordinates. It's a tree like structure, made up of joints and links. I
want to utili...

**how to simulate 2d motion controler**i am doing my project on two dimensional motion controller
i want to simulate it using matlab's simulink fascility
can anybody share me some idea
thank u
...

**trying to simulate 2d with 3d. How?**I'm trying to draw a box that will fit the boundaries of the client
area of a window using opengl and
gluPerspective( 45.0f, aspect, zNear, zFar);
where aspect = clientrect.right / clientrect.bottom
zNear = .1 and zFar = 10000.0
If I have a box defined as the same size as the window's client
rectangle (but shifte so that it's center is the center of opengl's
coordinate system), is there a way to find out what z-distance to draw
the box so that it just fills the screen? I'm trying to draw some
things inside this box, so that it looks like it is drawn in 2d
instead of 3d. I...

**The uses of 2D fluid simulations**Hey all,
I am just curious if any of you know of any uses for 2D fluid simulations on
the graphics world. I already have the following. I'm writing a paper on the
subject, and we have our own specific uses for it, mainly, to simulate a slice
of a symmetric object, and then extrapolate to 3D). But I am trying to think
of others. So can anyone suggest others? And, if possible, references to work
that has been done and published would be great.
We did think of another use: time-varying texture synthesis. However, we
couldn't find much on the subject.
Thanks.
Dave
On Dec 19, 9...

**simulation of rolling wheel in 2D**
Assuming a wheel is rotating on a slip-proof curved surface in 2D. Im
converting the angular acceleration to linear acceleration , but what is the
direction of the linear acceleration? Is it parallel to the tangent of the
surface at the contact point?
TIA
...

**Re: mechanical system simulation**I don't know much about electromechanical systems, but here are
some thoughts.
You might find the SigmaDelta example in
$PTII/ptolemy/domains/ct/demo/SigmaDelta/SigmaDelta.xml
to be of interest.
http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/ptolemy/domains/ct/demo/SigmaDelta/SigmaDelta.htm
Ptolemy II has a GR domain that is great for visualizing
mechanical systems.
The bouncing ball demos and the Newton's cradle demos could b of interest.
We've been doing a certain amount of work involving Zeno conditions,
hopefully more of that work will appear later.
...

**2D arrays simulated using lists**Hello,
I'm trying to maneuver around some 2D arrays, and I'm going crazy in
the meanwhile. Sometimes a certain syntax works, sometimes it doesn't
(for accessing elements).
Case in point: I have a function called
Comparer_Tableaux
which does this happily:
[...]
set NomAgentVieux *** $ListeAgentsParam($idxLigne,0) ***;
[...]
In an if in that function (which I understand is passed through expr,
so it is a special case), it even looks like this:
[...]
if { [string equal *** ListeActuelleAgentsParam($element,$idxColonne)
***
[...]
In this bit of code, I can't set the damn array...

**2D FDTD Simulation of wave Propagation**HI, is there any matlab implemention of 2D FDTD Simulation
of wave Propagation?
Thanks,
Ravi
Yes, I just posted a really simple one on the file exchange.
Hope you like it.
http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=21000&objectType=FILE
"Ravi " <ravi@mathworks.com> wrote in message
<g36fgl$jua$1@fred.mathworks.com>...
> HI, is there any matlab implemention of 2D FDTD Simulation
> of wave Propagation?
>
> Thanks,
> Ravi
Hi, I'm looking for a programme to create an 2D FDTD.
Could you help me, please?
&quo...

**WWW::Mechanize**Hey, all.
I'm using WWW::Mechanize for the first time because I have been tasked
with benchmarking the complete download time for my company's intranet
homepage from various branch offices. The problem is that this is a
very complex (horrible, ugly) page - multiple frames, images, external
CSS files, external javscript files, etc.
I've got the frames and images part working successfully, but it seems
WWW::Mechanize doesn't have the ability to detect the link and script
tags that point to external resources.
What's the best way to solve this problem? Do I need to switch...

**Simulating 2D 1/f pink noise**On Aug 15, 5:41 am, u...@domain.invalid wrote:
> Hi,
>
> I want to simulate 1/f (pink) noise on an 2D evenly spaced grid. I read
> the nice article in scholarpedia about this:
> (http://www.scholarpedia.org/article/1/f_noise) and I went through some
> of the papers like Gruneis (2001), Milotti (2007), Erland (2007) or
> Kaulakys (2007), however I did not understand much of it, especially not
> much about stochastic integrals(??). There seem to be many ways to
> create 1/f^alpha noise. Milotti even made a program.
>
> However all these papers resulted in 1D vect...

**simulating private member functions--static linkage**I've been thinking of doing things like the following:
[tmp]$ cat foo.h
struct foo{
int a;
void (*init)(struct foo *, int);
};
void new_foo(struct foo *self);
[tmp]$ cat foo.c
#include "foo.h"
static void init(struct foo *self, int a)
{
self->a = a;
}
void new_foo(struct foo *self)
{
self->init=init;
}
[tmp]$ cat a.c
#include "foo.h"
#include <stdio.h>
int main()
{
struct foo f;
new_foo(&f);
f.init(&f,10);
/* can't call init from foo.c directly, because it was declared
static */
}
Basically, I'm provi...

**2D fdtd acoustic simulation with gaussian source**Hello,
i have written the following code for 2D fdtd acoustic simulation. My purpose, is, to put the source in the middle of my grid and then create a wave (with fdtd). Then it will stop before the wave reaches the end of the grid. Something like this example: http://www.youtube.com/watch?v=hTNY26TBETY
Thank you very much. I will apreciate your answers.
%------------------------------------------------
clear; close all;
tic
%------------------------------------------------
% set global variables
SR = 44100; % sampling rate
c = 345; % speed of sound in air (m/s)
L = [0.87 0.87]; %...

**Use mechanism to simulate trayectory given by equation**Hello all,
I would like to simulate a parabolic movement (one piece thrown and that
moves with gravity), and I have a bucket elevator (buckets moving between
two sprokets) moving with uniform velocity. I want to see when an how this
piece impacts to the buckets.
Somebody has any idea to to that. (I have made all the algebra, I have the
equations of movement, and when is the impact, but I would like to have a
visual and more complete analysis). Is mechanism useful for that ??. First
how to simulate the movement of buckets fixed to a chain that moves between
two wheels, and then how...

**Soccer career simulator with 2D match: Championship Soccer 2004/05**The soccer career simulator 'Championship Soccer 2004/05' goes into the
next round.
The main goal of Championship Soccer is to offer a comprehensive
simulation of a dynamic soccer world. In a world of ~30.000 other soccer
players you can start your own career as a 16 years old prospect at your
favourite local team. You can choose what position you want to play,
goalkeeper, sweeper, defender, defensive midfield, midfield, offensive
midfield, winger, forward and other details about your player (age, hair
colour, starting reputation etc.). Then you will get random startin...

**Difficult problem: how to simulate an impulse response convolve with a 2D Gaussian function in Matlab?**
The problem is to simulate an impulse function convolving with a 2D Gaussian
function in matlab. So discretization is the first step. Suppose there is a
0.4m x 0.4m block, the impulse function is located at (1/6*0.4m,
1/2*0.4m)=(0.0666m, 0.2m) on this 0.4m x 0.4m block. The Guassian function
is assumed to centered at origin and its sigma is 1m. After convolution, we
are going to find the result value at points, e.g. (0.1m, 0.1m), (0.3m,
0.3m), etc.
I want to ask if the sampling step size for this 0.4m x 0.4m block, where
the impulse function is locaed, should be the same as the sampling ste...

**Problem: global variable with a 2d dynamic array simulated using a collection class within a singleton object**I am trying to use a singleton (global variable class) in which one of
the properties is
a List of innerclasses. My first question is should I be using a
Collection instead of
an ArrayList?
I am able to add each instance of my inner class to the arraylist
without error but it doesn't
seem to be retaining the individualized values of the innerclass and
secondly I am not able
to extract the innerclass values from teh list - regardless of what
i've tried...
I've tried casting, using myList.toArray() etc... Please help I am
totally stuck !
Here is the code below.......
import java....

**At wits' end: cannot find my error in simulating 2D heat/diffusion equation w/ finite diff. method**I would REALLY appreciate someone pointing out where I did something wrong.
I am trying to simulate a simple 2-dimensional heat diffusion situation where I have just a heated patch in the middle. I'm using the finite difference method to translate the heat equation with a 2-D laplacian into computer code. My problem is that my values blow up. Instead of the numbers diffusing outward such that they shrink around the central patch, I get nonsensical results as I step through time. I get numbers that keep getting larger, and, in fact, I get large negative numbers! .... ??
I am more or...

**Questions regarding creating mechanical product presentations, 2D & 3D animations, and printed reports incorporating AutoCAD drawings and 3D solid model assemblies**Hello everyone,
I am proficient with AutoCAD but a graphics / animation novice. I need
to create a presentation for a mechanical product, that will show how
the parts fit together and
assemble, and show the device in operation. I want to create a written
printed report with rendered images, drawings, supporting text, bills
of materials, etc., and I also want to create a simple website
(probably a free host) with drawings, supporting texts, and maybe a few
simple animations. Lastly, I want to create a decent quality
presentation and a 3D animation I can distribute on CD-ROM or DVD....

**Simulation simulation?**Hello all,
I am looking for a good software to simulate a software.
For training purposes we would like to simulate an ERP software.
That means we would like to take screen shots of the software we want to teach
and then simulate the processes which are done with the real data and only show
the results to the trainee. Of cause that can be done with p*werpoint, but we
would like to have different paths, choosen by selections made on the screens.
Any hint would be appreciated!
Thank you in advance,
Stephan.
...

**2D integral of 2D image**Hi all
My question concerns signal processing data. Basically taking a 2D integral of a 2D image.
I have a 64x64 pixel 2D image read into a two dimensional array of 64x64 cells. Each cell in the array has a number corresponding to the 'intensity' of the signal in each corresponding pixel, with the value of 0 in the cells of the array where it respective pixel has no signal.
The image has a centrally located roughly circular area with signal intensity that's above 0, the 'surrounding' outer areas have signal intensity of 0. (It's actually a CT image of a transverse se...