Tuesday, October 30, 2007
January 12, 2008
Lake Forest Country Day School Regional
Lake Forest Country Day School
145 S. Green Bay Rd.
Lake Forest, IL
Doors open at 7:30 AM
Opening ceremonies at 8:00 AM
Tournament ends at approximately 1:00 PM
Located just north of West Leigh on Green Bay Rd. Use Green Bay entrance and enter at the front door. Lunch of sub sandwiches, cookies and pop will be available.
Contact: Marc Arthur, 847-615-6161, firstname.lastname@example.org
OK, that being said, this was an exciting meeting. Mrs. Naughton contacted Allan Poole at Naperville Utilities and he has graciously agreed to assist the team with their energy project. He will come to our Thursday, 11/1 meeting to talk to the team. We again had 1/2 time on project and 1/2 time on missions. The project effort focused on preparing questions for Mr. Poole.
As a result of last meeting, the mission goal this week was to re-design the robot. Michael and Andrew brought in a new working robot and Joey brought in an innovative "stroller steering" robot design concept. First, the team generated a list of requirements on the white board. We then spent quite a long time discussing the best way to come up with a new design. Possible ways were 1) elect 2 or 3 boys to do it, 2) draw straws, 3) break into teams 4) build test robots. At the very end, Danny articulated the following: "we should combine the best of the robots we have into one robot, leaving out the parts of each that don't work". That lead to picking 3) and using his statement as a guideline.
During each team's mission time, they first used a voting method to prioritize the requirements. Then, they critiqued each of our 4 robots (tri-bot1, tri-bot2, Joey-bot & Toennies-bot), by thinking about what was most important, and came up with a composite design. Below is a shot of the white board with the requirements. The two teams were Black (Michael, Andrew, Patrick and Paul) and Red (Joey, Sam, Alex & Danny). The circled numbers indicate the priority of the requirements for each time. The hash marks were used as each team member picked what they considered most important (voting for each requirement only once). Also shown below are the Joey-bot (RCX) and Toennies-bot (NXT). The consensus for the teams is as follows:
Black Team: Liked Toennies-bot. Paul: need to move the NXT up vertically to make room for programmable battery. All: move NXT forward and make 1" shorter to be no longer than tri-bots. Needs a light sensor. Some questions about the casters.
Red Team: Also liked Toennies-bot. Joey is anti-caster due to their tendency to steer the robot when changing directions. Mr. Emge challenged them to come up with a better caster design. Alex suggested improving implement attachment. Alex, Sam and Danny didn't like the caster design either.
General re-design: use the Toennies-bot. It has good weight distribution but needs to be shorter and the caster design needs some work. In tests it seems to have good traction. The arm motor leaves good access to the buttons and screen. Michael and Andrew will address some of these issues and bring the bot back for next week. The team wants to move to the final design as soon as possible since it impacts their programs.
Requirements Joey-bot Toennies-bot
Great work by all this week.
Mr. Emge's engineering secret was "Don't Believe in Magic". When things don't happen like you expect, there is a reason why and you can figure it out. We discussed how we can use critical thinking, experiment and ask others to help us think it through and solve the mystery.
Mr. Emge and Michael segued directly to a repeatability problem when deploying the solar satellite. After some close observation it was determined that the robot was losing traction. Michael lowered the power level and it became more repeatable. They further analyzed the problem and found poor weight distribution.
During the meeting summary, Joey demonstrated his rack and pinion front-steer robot design concept. The team discussed the pros and cons of the two types of steering and as a group agreed that they would like to keep the differential steering mechanism of tri-bot. The robot traction problem was also discussed. Mr. Emge presented the issue with front-wheel drive vehicles and their weight transfer during acceleration. The team suggested re-designing the robot for better traction and that is the goal for the next meeting.
As we discussed the re-design, Michael had a very good question, "why did we build this robot if it doesn't work well"? The answer, that they didn't know then what they know now, really shows how far they've come in understanding what is important for their robot. The coaches are extremely proud of the progress they've made in the missions.
Sunday, October 21, 2007
Alex tallied another 25 points by placing the hydro dam. He built a rig for pushing it out and programmed the robot to make it happen.
Michael is making progress on the solar sattelite and truck, but his design depends on an arm, and the arm used on the oil rig may change. He does have a nice claw for grabbing the truck that can be used once the main robot design is locked down. Joey was out so Andrew continued working on the oil rig, which is turning out to be challenging. Mr. Emge discussed lever arms and force direction to help him analyze problems with deploying the arm. The simple-vs-complex session also discussed the oil rig problem. He was encouraged to discuss with other team members to get ideas. Paul suggested an attached container, for example. Andrew also tried pulling the barrels out instead of pushing the arm. He is learning a lot, even if it's a bit frustrating working on one of the more difficult missions. No doubt he will succeed!
Danny built a new container for power plant power and worked with Paul to shorten the implement used on the 2nd mission set. Paul and sam worked on harvesting Uranium. They're almost there, but their mission also includes getting corn and coal, so they have a way to go.
Friday, October 19, 2007
Joey and Andrew continued to make progress on getting oil from the oil-rig. Mr. Emge got an answer on whether or not they could lose contact with their container during the mission and the answer was "yes". Joey also brought in an RCX mock-up of a front-steer robot to show the group, but it was too fragile so he decided to put that off. Michael is now doing the solar sattelite before getting the truck, so he started working on the combined missions.
Nate had a design worked out for installing the solar panel, but found out that it violated the rules by attaching it to his implement. He worked on other ideas that do not require attachment.
At the end of the meeting, Mr. Emge introduced the "KISS" design principle: "Keep It Simple, Supernova" - make the design as simple as you can while still getting the job done. Time was almost out, so we'll continue that next time.
We also discussed the mission order and the team agreed to Sam and Paul's recommendation that Wind Turbines and Tree Planting should be combined with Corn Harvest and Uranium Mining, with the new combined missions being performed second. Joey suggested that steps 4 and 5 be swapped so that while the Solar Panel and Wave Turbine are being deployed, they can fill the fuel container for the Power Plant mission. The team agreed and the new order is published at the right.
Next meeting is Sunday, 10/21 from 3:00-4:30.
10/14 was our first Sunday meeting. The team concentrated on their mission work. We're now tracking our progress on the white board by points we've accomplished individually. Danny and Sam brought in our first 50 points!
Mr. Emge was out of town for both of these meetings.
Thursday, October 4, 2007
Patrick's revised "Mission Tracker" is now the top link on this page. The team is continuing to evaluate this order and it will likely change again as they find more efficient ways to solve the puzzle.
Danny and Sam made some great progress on planting trees and installing wind turbines. They made a prototype of an implement, shown to the left, that is proving to be useful for other missions as well. They both spent a good amount of time testing their implement, "thinking like a robot". Paul helped with mounting to the robot and they began programming.
Joey showed some great initiative bringing a Lego building book to illustrate an idea he had about using rack and pinion instead of differential steering, as our current robots are built. The team has to figure out if this is the direction they'd like to go since it's a big change from what they have done so far. Joey did a great job getting his ideas across.
Patrick and Paul worked on design of a corn and uranium harvesting machine. Patrick was also thinking like a robot to test their ideas while Paul helped Danny and Sam. In their end-of-meeting summary they suggested changing the order so that they can dump the coal and push the truck out in the same mission. They are also considering abandoning their first design and trying Sam and Danny's implement.
Joey and Andrew worked together to bring oil barrels from the oil-rig to base. This is a challenging and critical mission since any oil in the water subtracts a lot of points. They are up for the challenge and tested Nate's oil catcher. They discussed improving Andrew's robot since the wheels have a lot of camber (angled).
Nate worked on ideas for the wave turbine and solar panel. He's planning to use the light sensor to navigate and requested to the team that one be designed into the robot and it was agreed to do this. He also plans to use a moving arm to lift the panel. Nate has a challenging pair of missions but he has great ideas and will be successful.
Alex worked on ideas for the power plant energy supply. He's still kicking around ideas but is also considering using Sam and Danny's implement. He was able to resist jumping straight to building to consider the options.
Halfway through the meeting, Mr. Emge spent 10 minutes on "Engineering Secrets". This week it was the secret to design - thinking it through before jumping to a solution saves a lot of time and testing helps to improve the ideas. Also, don't lose your programming work accidentally by saving your new work over the stuff you just got working. He showed the team a couple of complex circuit boards to show that you can accomplish some predictable results if you spend the time to do some planning on your ideas.
Mr. Emge will be out of town for the next 2 meetings.
Summary and Agenda
Announcements to transition to new meeting structure:
* Added a second meeting – Sundays from 3-4:30, starting 10/14
* Added 2 stations for design and building
* Removed the electrical and wheel parts – ask coaches for the box if you need it
* We’ll have a sample schedule ready before the next meeting. All projects need small goals to meet the big one. The group will look it over and change it as necessary.
* We’re buying another robot! Need to establish rules for changing the robot chassis.
New meeting structure:
* Summary of last meeting
* Agenda for this meeting
* Engineering secrets, ~ 10 minutes
* Groups of 2 (or 3) Work at 4 stations, rotating every 15 or 20 minutes
* Each group summarizes their work during this meeting ~ 10 minutes (2 minutes each)
* Remind the group of any commitments
Mrs. Naughton – update on project
Engineering secrets: Learning from others – experts: how to design
Requirements - what is needed, at what cost and by when?
Concept Design - what basic strategy do we have?
Detailed Design - taking the concept ideas to a working robot
- robot (mechanical) design
- smarts (software) design
Testing - Does it do what we thought?
- if not, what can we improve?
- May need to “tweak” concept or details
Group work. Since we have so much information to show this week, we will only swap from robot testing and design one time. Mrs. Emge may also have some programming information at one station instead of design.
1. Joey & Andrew table/computer
2. Michael table/computer
3. Sam & Danny design*
4. Paul & Patrick design*
5. Alex & Nate design *
*Those not designated as table/computer can use 3rd computer for programming or join Mrs. Emge learning about programming
The main results are:
- Agreement to add a second meeting on Sundays at 3-4:30, starting 10/14. Mrs. McCurdy will send out an email to formally inform the parents. We can adjust the day and time if there are too many conflicts. We're hoping most of the team can make it most meetings.
- Consensus that a second robot kit will help by giving us more building pieces and allow the kids to break up into more groups to design and test their missions. This will pretty much consume the rest of the money collected at the season start. We discussed using the highlands tie-die shirts for team shirts since most kids have them and there are a couple spares among the coaches families.
- There are many ways to organize a group. Supernova is among the youngest and largest groups allowed by FIRST Lego League. We are lucky to have so many talented kids and we want them to be in an environment that feeds their amazing creativity. Long term, we decided on having 4 work stations going at a time. 2 for programming, 1 for robot hardware design and 1 for project work (adjust as necessary). We will rotate the kids every 15 to 20 minutes so they don't get bored. We'll try to keep groups to 2 kids, 3 as necessary. Depending on progress being made, we will adjust on the fly if it makes sense to let a group continue to focus.
- Meeting structure will be:
- Summary of last meeting and state agenda for this one. Mr. Emge and Mrs. Naughton will plan the meeting agenda by email on Tuesdays before each meeting.
- 10 minutes of "engineering secrets"
- work on challenge at the stations
- last 10 minutes each group summarizes what they did during this session as practice for the technical presentation
Mr. Emge and attended the IL coaches' kickoff meeting and Mrs. McCurdy attended via conference call. We got a lot of good information about the rules and rubrics for tournaments, which was conveyed to the team. Mr. Emge also reviewed "TrialBot1" and the team discussed its design.
Mrs. Naughton worked with the kids to generate a list of questions for the Highlands contact that is helping us with our building survey. Those questions have been delivered.
Mrs. Emge is going to put up a poster of the rules, and insert the rules and Q&A into a binder for easy access without disturbing those using computers for robot or project work.
Trib-bot was back for practice and the boys worked in groups to work on designing their missions.
Patrick brought in a new mission order and discussed with Mr. Emge. It's now posted on the white board.
Mrs. Emge: put up poster and put rules & Q&A into binder.
Mr. Emge: 1) Send window ratings information to Alex from a magazine he has. 2) Answer question: can we intentionally lose contact with an item, like a container, as long as we regain contact and return to base, or is it a stray object immediately?
Mrs. Naughton: send questions to highlands
All Coaches: coaches meeting before next Thursday.
Team: Continue their mission designs.