manavkataria / invertedpendulum

Summer Project at IIT Bombay
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mechanical design issue.. #6

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago
What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?

Please use labels and text to provide additional information.

Original issue reported on code.google.com by mudit.da...@gmail.com on 13 May 2010 at 3:18

GoogleCodeExporter commented 9 years ago
Hi here we need a discussion to finalize the mechanical design

options:
1. Cart based
2. Rotatory 
3. Sliding based

Cart based:
it can be simplifies by resticting motion in 1d but still there is a huge 
possibility that ..... cart may run in a particular direction even though it 
has 
balanced ....it wont look that robust although problem is solved.

Slider based: it has resticted area to move so problem is not with that ....but 
pendulum may fall when our slider reaches boundary and its not a very pleasant 
condition either if we dont have swing up mechanism....
Although we can try our hands in swing up mechanism later but its not at all 
our 
primary objective we must concentrate on balancing first to complete our 
primary 
model as early as possible.

Rotary based: In my view this is the best alternative we have ...b' coz in this 
design we have leisure to rotate as many times as it wants ...It has lots of 
distance to balance the pendulum. Also we can add on swing up mechanism later 
without having to alter the design..Also its a big issue to store the project 
in our 
room ....slider mechanism would account for a large mechanical body so we have 
to 
dismantle it to store...rotatory and cart based have smaller bodies to be 
stored.
Although last point may seem worthless but its too a important factor if we 
want to 
go on improve our design....our mechanical design must be robust to last longer.

But give this thing a thot that rotatory based would change equations of motion 
or 
not...we dont want them to get complex to add on difficulties...
i think they wont because still applied force is in the link below ..only 
difference 
is locus of the moving rod would be cylinderical surface instead of a plane. 

pls post here your views so that we can lock our mechanical design issue. 

Original comment by mudit.da...@gmail.com on 13 May 2010 at 3:37

GoogleCodeExporter commented 9 years ago
I too agree with the rotatory base....i read some docs and also saw videos on 
the 
same...as far as equations of motion are concerned ,i don't think thats going 
to 
pose a serious hurdle.......needs a few modifications

Original comment by rhythm2...@gmail.com on 13 May 2010 at 5:43

GoogleCodeExporter commented 9 years ago
[deleted comment]
GoogleCodeExporter commented 9 years ago
i too agree with the rotary type.
Equations of motion will be based on Lagrangian dynamics, see this link 
regarding the
dynamics.
[www.cse.wustl.edu/~nganesan/ese447/dynamics.pdf]

Original comment by sushanti...@gmail.com on 13 May 2010 at 8:58

GoogleCodeExporter commented 9 years ago
i think its too much...I have uploaded a file named 0964A in file section pls 
watch 
it...its standard design by microchip and no such things are required.

Original comment by mudit.da...@gmail.com on 13 May 2010 at 12:05

GoogleCodeExporter commented 9 years ago
This is a good documentation. 
Update this with our current discussions on mechanical design. 
And follow up with your plans for simulating mechanical design on software. 

Original comment by manavkataria on 25 May 2010 at 6:56

GoogleCodeExporter commented 9 years ago

Original comment by manavkataria on 16 Jun 2010 at 9:02

GoogleCodeExporter commented 9 years ago
"Pot ki shaheedi bachane ke liye, ek tarkeeb!"

On discussing with a friend we came up with the following solution for saving 
the pot from becoming a martyr - We give it a Metal Jacket! - Iron Man Style! 
...Ok! I better stop now! :P

For documentation: The major problem we face is that the pot splits into 2 due 
to 
  + The centripetal force acting on it
  + it does not have any support keeping it from splitting
  + Its shaft solely bears the load & centripetal force of link2

Original comment by manavkataria on 21 Jun 2010 at 5:48

Attachments:

GoogleCodeExporter commented 9 years ago
+ The Setup could control the pendulum relatively better in a certain sector of 
the platform.
+ This indicates that mechanical design highly contributes to the development 
of a good Inverted Pendulum.

Following updates are being planned: 
+ Implementing a new caster wheel
+ Using a Spirit Level to level the platform and link1. 

@ MUDIT : 
It would be a good idea to upload a video here showing the current state of 
we've achieved.

Original comment by manavkataria on 23 Jun 2010 at 5:13