poster id 31 continuous track design - ieom society · poster id 31 continuous track design ......
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Poster ID 31 Continuous Track Design
Mason Chen, Timothy Liu, and Jason Li
1 © IEOM Society International
Define Project
• Project Objective:
– Study Continuous Track Design
– Apply Minitab Statistics
• Project Scope:
– Play Hill Climb Racing Video Game
– Use Mountain Stage and Assess Five Cars
• Project Hypotheses:
– Any significant Player Dependency (Reproducibility)
– Continuous Track Design better than Wheel Design?
2 © IEOM Society International
• Continuous track, also called tank tread or caterpillar track, is a system of vehicle propulsion in which a continuous band of treads or track plates is driven by two or more wheels.
• The large surface area of the tracks distributes the weight of the vehicle, enabling a continuous tracked vehicle to traverse soft ground with less likelihood of becoming stuck due to sinking.
https://en.wikipedia.org/wiki/Continuous_track
Introduce Continuous Track Technology
3 © IEOM Society International
Advantages of Wheel Design • Lower Production Costs • Higher Maneuverability • Lighter Weight • Design Simplicity
• More Material Selection Disadvantages of Wheel Design • Drive over Obstacles
Advantages of Continuous Track Design • Higher Power Efficiency • Higher Traction/Friction • Moving on Rough Terrain • Less Ground Impact/Damage • Weight Growth Potential
Disadvantages of Continuous Track Design • Lower Speed • Less Maneuverability • Easier Track Broken • Shorter Life Cycle • Difficult to Repair
Compare Wheel vs. Continuous Track
https://www.intorobotics.com/wheels-vs-continuous-tracks-advantages-disadvantages/
4 © IEOM Society International
Mountain Stage Challenges (Peak Modulation Profile, Hill Slope)
(Engine Power, Tire Size/Traction, 4WD, Suspension)
5 © IEOM Society International
Design Experimental Study
• Measurement System Analysis
• Failure Mode Analysis
• Select and Compare Five Best Cars
– Wheel Design: Hot Rod with Bigger Tire Size, and Moon Lander with Lifting Feature
– Continuous Track Design: Tank (heavier), Super Offroad (lighter), and Hovercraft (larger contact area)
• Upgrade Car and Build Regression Model
– Identify which wheel/track design has more potential to overcome Mountain Stage Challenges
6 © IEOM Society International
Select Five Cars for Mountain Stage
7 © IEOM Society International
Measurement System Analysis I (Repeatability)
• Repeatability: run the same car on the same Mountain Stage for 10 Times: ensure player is well trained and who can repeat the same measurement
• Result: the distribution IQR= 168, Standard deviation= 120 due to two failure modes observed. Repeatability is acceptable.
8 © IEOM Society International
Measurement System Analysis II (Reproducibility)
Train three Players and check whether three players can reproduce the similar score distribution. • Three Players (Player C, Player J, and Player M) demonstrated similar score
pattern (no reproducibility concern)
9 © IEOM Society International
Scatterplot of Car Upgrade
Two Cars with Continuous Track Design (Track, Super Offroad) showed higher upgrade potential on the Mountain Stage
10 © IEOM Society International
Build Regression Model
Tank Regression Model has shown Slope= 29.95 (Highly Upgrading Potential) and R-Square= 97.4% (Highly Accurate Model)
11 © IEOM Society International
Results: Compare Regression Models
• Continuous Track Design has shown a higher potential than Wheel Design to run over the modulated peaks
• Heavier Continuous Track Tank has a better prediction (97.4%), though Lighter Super Off-Road has a better Potential Slope
• Even with Bigger Tire Size, Hot Rod still could not survive on the highly modulated Mountain Stage
12 © IEOM Society International
About Super Off-Road
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Pros: • It's very fast • Can reach long distances • Can climb tall hills • Stay more often on the ground than in the air Cons: • It's very easy to lose the spoiler • When you lose the spoiler, it's difficult to drive • Can't make any flips unless you lose a spoiler • Fuel runs pretty quickly (within 47sec)
http://neckflip.wixsite.com/hillclimbracing/super-offroad © IEOM Society International
Conclusions
• Conducted Measurement System Analysis: passed both repeatability and reproducibility
• Designed a successful experiment to study the Car Upgrade Potential among five different cars
• Demonstrated the Advantages of Continuous Track Design over the Wheel Design on the Mountain Stage
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Future Work
• Further Study the Track Design Upgrade Technologies:
Engine, Suspension, Tire, Fuel, and Downforce
© IEOM Society International