Recent content by e-dard

ok, well i have just realized i haven't asked a question that perhaps i should know the answer to. we know that when both thrusters act on the vehicle their combined forces produce the linear acceleration through the centre of gravity a = ((tport + tstar) - Drag) / mass we also know that the...

is it not possible to make it so that the heading change is directly proportional to the differential thrust? Indeed, isn't this what i was doing when i was using the ICR?? Also, why is it that none of the equations (i mean the ones you have formulated ) are not in the basic Newtonian...

Because in real life they would have control of two things: thruster star and thruster port. This is all the neural networks will have control of too. Using evolution they will learn how to avid obstacles, follow way points and group together in the water. My point was that if it is a massive...

Hi Chusslove, thanks for taking the time to post again, this is beginning to make more sense to me now. I will probably implement the changes to my model tomorrow and let you know. :) I am not actually interested in controllers that can control a `difficult to control' submersible...

I don't think that's called for, do you? Who said i didn't appreciate his posts? when did i ever say i was trying to make a serious simulation? If i was, i would be spending months doing it, would probably be modeling fluid dynamics, and certainly not limiting things to 2 dimensions. As...

ok, well i guess the first thing i don't understand is why the vehicle's translational velocity would not be in the same direction as the two velocities produced by the thrusters? They are fixed in position and are parallel. Also, i don't quite understand a lot of the points, mainly how they...

wow, thanks a lot for the post, i appreciate it! However, i think its a little complicated for what i want! i am going to try and make head and tail of it and get back to you tomorrow, thanks, edd

ok :smile: So in that case, suppose the sub is rotating at 4r/s and the power is cut where does the force come from to reduce the subs rotational velocity to a negligible amount in a very short time? supposing the craft moves with 0 rotational velocity for a while, then turns for a while...

Apologies if my writing is not clear. I am not moving the water at all, i was mearly pointing out that as far as the AUV is concerned it moves in 2 axes: forward and a rotation upon the z axis, again you are still calculating the yvel for the auv which i don't understand. Of course, for the...

hi, there are never any accelerations in the y-axis (in the frame of the vehicle) because the vehicle only ever moves forward. Of course, moving the actual vehicle in the global environment there are changes in displacement in the X and Y axis but as far as the vehicle is concerned it only ever...

ok, that would be brilliant, thanks a lot! It may be worth pointing out that i am only interesting in the movement in the x,y plane and that the simulation will not include effects like currents etc. thanks, edd

c'mon guys! surely this is not difficult for physicists! I am fairly sure it is basic mechanics, i just need the right things in the right places. Please help! thanks

Hi all, this is my first post. Google has failed me, although i have learned a lot of physics in the meantime. I am not a physicist (am an evolutionary computation person). Anyway, i am building a physics simulator for an auv submersible and i wanted something cleared up :-)...