But in that case , if we use only two wheels will it be able to traverse a rough terrain ?
On Jan 9, 2008 4:07 PM, Jordi <[EMAIL PROTECTED]> wrote: > > If you don't need a perfect simulation, you can make just a physical tank > with 2 wheels and a visual mesh with 8 wheels. Maybe tanks has more wheels > only because that way they have no single point of attack but all the wheels > in one side are moving at the same time what to all practical effects can be > managed by differencial wheeling. > > About the mass effect you comment I have just tried it with a 47000 kilo > ball and it is > falling though the ground also. It is an ODE problem and it surely can be > tweaked, I think that Nate will be able to solve it, stick with 40.000 till > then. > > > > > > On Jan 9, 2008 7:23 PM, hemanth korrapati <[EMAIL PROTECTED]> > wrote: > > Hey thanks for ur help. > > > > I too dont know whether tanks use differential drive or steering. > > But if a tank has 8 wheels how can we use a differential drive? I mean > > which wheels use the drive and which are the followers ? > > > > Also another problem is that I made a small model for the tank for > > which i have set the "mass" parameter as 47 tons. When I start the > > simulator the robot fall off through the ground. If I reduce the mass > > to 40 then it becomes stable. Why is it ? Can we solve it ? > > > > Thanks > > > > > > > > > > On Jan 9, 2008 3:39 PM, Jordi <[EMAIL PROTECTED]> wrote: > > > > > > The controller you are looking for can be found in the patch tracking > > > system. It can control any number of wheels, even 8 as steering or > > > non-steering roles. > > > That code has not been integrated due to a bug in how the steering > wheels > > > are managed, I hope it will be solved soon and integrated next week. > > > > > > Tanks are managed with steering? I'd bet they use a differential drive > > > system. > > > > > > > > > > > > > > > > > > On Jan 9, 2008 5:17 PM, hemanth korrapati < [EMAIL PROTECTED]> > > > wrote: > > > > Hey > > > > > > > > Thanks for that. > > > > But a tank has 8 wheels with equal number of them on both sides.But > > > > the controller for pioneer is for a differential drive system which is > > > > not the one in a tank. > > > > I guess it is difficult to build a controller for a tank. But is there > > > > any controller which controls a normal vehicle with four wheels ( > > > > front wheels are steered and the back wheels follow). > > > > > > > > > > > > > > > > > > > > > > > > On Jan 8, 2008 11:48 AM, Jordi <[EMAIL PROTECTED] > wrote: > > > > > > > > > > I know nothing about tanks (luckily) but I guess you can use the > > > > > differential_position controller with it (the pioneer example is > using > > > it). > > > > > About the weight you can search wikipedia. The shape, in your > sources > > > > > directory you have a doc/ subdirectory with a mesh_tutorial.html > file in > > > it. > > > > > There you have some links to free models that can be exported to > Gazebo > > > and > > > > > instructions. You may be lucky and find a tank (and some other > > > insteresting > > > > > models). > > > > > > > > > > > > > > > > > > > > > > > > > On Jan 8, 2008 3:07 PM, hemanth korrapati < > [EMAIL PROTECTED]> > > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > > hi > > > > > > > > > > > > does anybody have a model for a tank like vehicle which simulates > its > > > > > > weight,shape,etc.. > > > > > > > > > > > > > > > > > > thanx > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > > Check out the new SourceForge.net Marketplace. > > > > > > It's the best place to buy or sell services for > > > > > > just about anything Open Source. > > > > > > > > > > > > > > > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > > > > > > _______________________________________________ > > > > > > Playerstage-gazebo mailing list > > > > > > Playerstage-gazebo@lists.sourceforge.net > > > > > > https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > Jordi Polo Carres > > > > > Natural language processing laboratory > > > > > NAIST > > > > > http://www.bahasara.org > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > > Check out the new SourceForge.net Marketplace. > > > > > It's the best place to buy or sell services for > > > > > just about anything Open Source. > > > > > > > > > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > > > > > _______________________________________________ > > > > > Playerstage-gazebo mailing list > > > > > Playerstage-gazebo@lists.sourceforge.net > > > > > https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > Check out the new SourceForge.net Marketplace. > > > > It's the best place to buy or sell services for > > > > just about anything Open Source. > > > > > > > > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > > > > _______________________________________________ > > > > Playerstage-gazebo mailing list > > > > Playerstage-gazebo@lists.sourceforge.net > > > > https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo > > > > > > > > > > > > > > > > -- > > > Jordi Polo Carres > > > Natural language processing laboratory > > > NAIST > > > http://www.bahasara.org > > > > > > > ------------------------------------------------------------------------- > > > > > > > > > Check out the new SourceForge.net Marketplace. > > > It's the best place to buy or sell services for > > > just about anything Open Source. > > > > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > > > _______________________________________________ > > > Playerstage-gazebo mailing list > > > Playerstage-gazebo@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo > > > > > > > > > > ------------------------------------------------------------------------- > > Check out the new SourceForge.net Marketplace. > > It's the best place to buy or sell services for > > just about anything Open Source. > > > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > > _______________________________________________ > > Playerstage-gazebo mailing list > > Playerstage-gazebo@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo > > > > > > -- > Jordi Polo Carres > Natural language processing laboratory > NAIST > http://www.bahasara.org > > ------------------------------------------------------------------------- > Check out the new SourceForge.net Marketplace. > It's the best place to buy or sell services for > just about anything Open Source. > http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace > _______________________________________________ > Playerstage-gazebo mailing list > Playerstage-gazebo@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo > > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. 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