Search found 679 matches

by fferri
26 Feb 2014, 12:04
Forum: General questions
Topic: how to avoid deformable or bending links
Replies: 5
Views: 2790

Re: how to avoid deformable or bending links

This is the dynamic content during simulation:

Image

I cannot try with Vortex, but with ODE the bending effect is less prominent.

Here is the scene file
by fferri
26 Feb 2014, 09:32
Forum: General questions
Topic: how to avoid deformable or bending links
Replies: 5
Views: 2790

how to avoid deformable or bending links

Hello, Again I'm trying to design a dynamic simulation for our robot, starting from the most complex part which is the tracked flipper-bogie-flipper body. I believe I followed the recommendations for designing a dynamics simulation and here's the model tree during the simulation: http://s28.postimg....
by fferri
06 Feb 2014, 10:14
Forum: General questions
Topic: pass-thru passive joint
Replies: 1
Views: 1514

pass-thru passive joint

How to implement such a joint? (see picture) http://s29.postimg.org/ccwuob5w7/Screen_Shot_2014_02_06_at_10_05_50.png It is a passive joint but with two links attached on opposite sides. I tried several variants, but the links always fall off when moving away from the standard configuration 1 link ->...
by fferri
17 Oct 2013, 14:59
Forum: General questions
Topic: compass (magnetic) sensor
Replies: 2
Views: 3013

Re: compass (magnetic) sensor

here is the simple magnetic sensor.

it requires setting the magnetic vector for the current geographic location (default: {0,1,0})

http://dfiles.eu/files/m7mnv5kiu
by fferri
16 Oct 2013, 21:43
Forum: General questions
Topic: How to Program in C++ or Python
Replies: 3
Views: 7008

Re: How to Program in C++ or Python

You can't write a script in C++ or Python. You can however write a plugin in C++, using the regular API. Or you can write an external Python program, and use the remote API to interface with V-REP. If you want to write a script, use Lua. It has a very simple syntax, easy to understand, and you can g...
by fferri
16 Oct 2013, 20:54
Forum: General questions
Topic: compass (magnetic) sensor
Replies: 2
Views: 3013

compass (magnetic) sensor

has anyone ever attempted creating a magnetic sensor? those sensors are used in reality for measuring the magnetic field along the three axes X, Y and Z. this (eventually in conjunction with an accelerometer) can be used to obtain the orientation of the magnetic north. how to make such a sensor in V...
by fferri
10 Sep 2013, 16:58
Forum: General questions
Topic: problem in linking my model's pieces, physics simulation, re
Replies: 7
Views: 5265

Re: problem in linking my model's pieces, physics simulation

how about using such a configuration?

Image

that is: there is a dynamic joint linking the two bogies, and a dependent joint linking one bogie to the body, having angle = 0.5*dynamicBogiesJoint.angle ?
by fferri
09 Sep 2013, 23:27
Forum: General questions
Topic: problem in linking my model's pieces, physics simulation, re
Replies: 7
Views: 5265

Re: problem in linking my model's pieces, physics simulation

thanks. I added dynamic joints to link body to tracks (I needed them anyway, because the tracks are not fixed, but they rotate wrt the body), plus other fixes. https://dl.dropboxusercontent.com/u/52374228/talos-20130910.png however, in the real robot, there is a differential lock, so the two track j...
by fferri
09 Sep 2013, 19:51
Forum: General questions
Topic: problem in linking my model's pieces, physics simulation, re
Replies: 7
Views: 5265

problem in linking my model's pieces, physics simulation, re

hi all, this is my first attempt in modeling a robot. it is a tracked robot with 4 active flippers that can be rotated individually: http://www.bluebotics.com/wp-content/uploads/2012/03/absolem.jpg I try to put the pieces together, by copying the structure of components/locomotion/caterpillar model,...