two wheel balanced moving cart ( need help)

J

jalal

New Member

• Apr 30, 2007

• #1

hi everyone,
I need help with this project which is a cart with only two wheels but it should be balanced, which means if it fill down on one side front or rear it should re balance it self again. for this i thought that i can use a zero crossing detector which will know if it fill on one side it trigger the comparator to compare with the zero refrence but i'm not sure that it will work efficentlly.
It also should be moving forward and backward, right and left.
do u got any ideas??
please help me i got only month to implement that idea and i'm so bussy that i'm working 12 our night shift 6 days a week.

 

ericgibbs

Well-Known Member

Most Helpful Member

• Apr 30, 2007

• #2

hi jalal

You can buy 'tilt' sensors, that can be set to switch at a preset angle [ by positioning the tilt sensor]

Put one at each edge of the cart, so if the cart tilts towards that edge the tilt switch closes.

How do you plan to correct the tilt of cart, when you have detected the tilt??

 

Roff

Well-Known Member

• Apr 30, 2007

• #3

Dean Kamen solved this problem in the Segway. It is not a simple problem.

 

Sceadwian

Banned

• Apr 30, 2007

• #4

You need really high speed control loops and high update rate sensors to do something like that, very high torque motors as well. I've seen mpeg's of a guy on the net that built his own segway using the same principles (though not nearly as elegent)

 

J

jalal

New Member

• May 2, 2007

• #5

when the professor gave me this idea he told me that it is easy to be done and i'm sure he knows the right circuit for this project. it must have an easier solution.
thanks anyway
if i got an easier answer of this problem i'll try and then i'll keep hear so you can make sure if its ok or not.

 

Roff

Well-Known Member

• May 2, 2007

• #6

Do a Google search on "balancing robot". You can probably steal someone else's design. You might not learn much, but you'll get a good grade, unless your professor also knows about Google.

 

K

kamdy

New Member

• May 3, 2007

• #7

Hi
Try to watch the following video from Engineering TV web site

1- **broken link removed**

2- **broken link removed**

 

Last edited: May 3, 2007

dknguyen

Well-Known Member

Most Helpful Member

• May 3, 2007

• #8

Have you ever worked with an inverted pendulum in your control classes before? If you haven't, you might not be able to get your project done in time...

 

J

jalal

New Member

• May 18, 2007

• #9

Is there any reference i can go back to about the inverted pendulum
just to get the general idea of it

 

B

bobledoux

Member

• May 18, 2007

• #10

Balancing Robot

I've seen designs that eliminate gyros and accelerometers by aiming an infrared distance sensor at the ground from the top of the robot. It only works on flat ground.

Here's a design that uses an ultrasonic sensor controlled by a Basic Stamp:

**broken link removed**

 

evandude

New Member

• May 18, 2007

• #11

jalal said:

Is there any reference i can go back to about the inverted pendulum
just to get the general idea of it

Click to expand...

Uh, yes, GOOGLE, which should almost always be your first reference.

 

Sceadwian

Banned

• May 18, 2007

• #12

Wikipedia is a good start for 99% of electronics topics.