On Ramp to Robotics with TI Rover Unit 1 (Motion) with Mars Rover Challenge Posted

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David Santucci

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Feb 26, 2018, 5:39:05 PM2/26/18
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We have just posted a set of lessons and a challenge using the TI Rover to teach fundamental concepts of robotic vehicle control. 
See the description and links below.
The materials were piloted in a middle school in Garland, Texas with students in grades 6-8.

For those of you who will be attending the T3 International Conference in San Antonio, come by the STEM room, Room 007C in the Convention Center, during open hours (Friday 11-1:15 and 3:45-5 and Saturday 12-2:15 and 4-6). We would be happy to talk with you and demonstrate the activities.

On Ramp to Robotics Unit 1 (Motion) with Mars Rover Challenge

Level: Middle School/ early high school

Summary: Students will learn and use basic concepts for robotic vehicle control along with math concepts to write a program to drive their Rover around the base of the Olympus Mons volcano on the surface of Mars. Note: Also, includes concepts to give students an on-ramp to participating on robotics teams.

Mars Rover Challenge for the TI-84 Plus CE OS 5.3

http://www.t3europe.eu/resources/?resource_id=2078 or http://bit.ly/2t03U3I

 

Mars Rover Challenge for the TI-Nspire CX OS 4.5

http://www.t3europe.eu/resources/?resource_id=2069  or http://bit.ly/2HDd5dJ



Dave Santucci, Fred Fotsch, Harshal Chhaya and Erick Archer

Heidi Rudolph

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Apr 10, 2018, 4:27:15 PM4/10/18
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I see the command for moving Rover "to Polar" but does that just mean to a Polar coordinate like the XY command?
What about a polar equation, or for that  matter, a linear (or other Cartesian) equation?  I assume that you would have to generate points in the Spreadsheet and use that data?  (way above my pay grade....)

John Hanna

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Apr 10, 2018, 6:06:13 PM4/10/18
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Yes, Heidi, Rover knows polar coordinates.

“TO POLAR a b” moves Rover to the polar coordinate r=a, theta=b in the polar coordinate system.

To ‘draw’ a cardioid:

                  

          Send “RV TO POLAR 0 10”

          Text “Insert marker”

          For theta,0,2pi, pi/12

               r:=5*(1+cos(theta))

               Send “RV TO POLAR eval(r) eval(theta)”

          EndFor

 

 

Regards,

         John

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Jody Crothers

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Apr 10, 2018, 7:11:24 PM4/10/18
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Hi Heidi


here is a polar equation file

It does just as you thought generates the points and then moves accordingly

There is also a second program in the file that generates values on the fly in a loop

Jody

Jody Crothers

Head of Learning Area (Mathematics)

Safety Bay Senior High School

Western Australia

www.jodstar.com
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Western Australia

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ToPolar2.tns

John Bament

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Apr 10, 2018, 8:03:16 PM4/10/18
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Morning all

I have started teaching Transformation of Graphs, both Trignometry and Piecewise, to my Year 11's.

I thought the Rover would be a fanastic way of visually showing this in action - especially with two Rovers moving at the same time!

Has anyone done something like this?

I'm looking forward to getting our class herd of Rovers next term to try this idea out!

Best wishes, regards

John

Rudolph, Heidi

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Apr 11, 2018, 7:43:09 AM4/11/18
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Fun!   You could start the Rovers at different "origins" first, then have them re-program to fulfill that transformation!?

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Jody Crothers

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Apr 11, 2018, 8:16:26 AM4/11/18
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Hi John


Are you using 1 set of axes or 2?

The transformation is very good conceptually when using sets of points initially.

I had year 8s translated their Cartesian coordinates images so one point was on the origin.

They did it in pairs. One translating the other typing in the new points.


cheers

Jody

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Jody Crothers

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Apr 11, 2018, 8:19:41 AM4/11/18
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Hi again

I forgot to add, the starting point of the function is the biggest issue,

with no  built in pen up or down the initial line as the rover leaves the origin can get messy

cheers

Jody


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John Hanna

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Apr 11, 2018, 10:32:38 AM4/11/18
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I believe something can be accomplished with this…

Translation:

-         Start at ‘home’ (0,0,east) (mark this location and heading!) and when running the program, input for a starting point.

-         Without a marker, move to starting point. Pause to…

-         Insert marker and draw the shape (lists), then Pause to remove marker.

-         Return ‘home’

-         Repeat (re-run or loop).

 

For other transformations add appropriate instructions.

To pause:

       CE: Pause “message”

       CX: Text “message”

 

Regards,

         John

Brown, Curtis

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Apr 11, 2018, 10:40:44 AM4/11/18
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One could also use the set RV position command to give a starting point other than to origin.

Send "SET RV.POSITION 2 3" would tell rover that its current position is at (2,3). The heading would still need to be dealt with, although I have found that if I am intending to start somewhere other than the origin, continuing to start with the default initial heading (east) is sufficient.

 

Regards,

CB

John Hanna

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Apr 11, 2018, 11:16:44 AM4/11/18
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What’s the diff between TO XY and SET RV.POSITION?

There’s also a SET RV.ORIGIN which makes the current position the origin.

 

Regards,

         John

Brown, Curtis

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Apr 11, 2018, 11:28:14 AM4/11/18
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SET RV.POSITION names the current position similar to SET RV.ORIGIN repositioning the grid. Example:

 

If I want to set rover down on a grid at the point (3,4) and then drive to the origin, I could use

Send "CONNECT RV"

Send "SET RV.POSITION 3 4"

Send "RV TO XY 0 0"

 

The initial heading (unless otherwise controlled) is still assumed to be east, but with this you can control rover’s understanding of its initial position.

 

Hope this helps,

John Hanna

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Apr 11, 2018, 12:38:19 PM4/11/18
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Aha~ read the manual, eh? ;)

Jody Crothers

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Apr 11, 2018, 7:14:44 PM4/11/18
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Great Idea

I like the idea of move then wait command, it will work well with the drop in pen rovers but not the screw in one.


cheers

Jody


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