reliability of new high tech roller coasters by: topher schott dses-6070 hv5 statistical methods for...
TRANSCRIPT
Reliability of New High Tech Roller Coasters
By: Topher Schott
DSES-6070 HV5 Statistical Methods for Reliability Engineering
Spring 2008 Professor Ernesto Gutierrez-Miravete
What could go wrong in a roller coaster?
Launch Track
Urethane Wheels
Sensors Magnets
Brake RunsLift Hill
Train
TrackInversion
Launch Track
Reliability of Launch Tracks
Hydraulic
Linear Induction Motor
“[Many new coasters] rarely
open during its first season”
“Many of these rides
ran reliably once the
kinks were worked out…”
Methodologies for Project
• Event Tree• Fault Tree• Monte Carlo Simulation• FMECA
Wind Weight Precipitation Momentum Will it fly? Availability speed momentum reqd7 1960 68 789800 1 1.000 150 4350008 1873 344 665961 1
18 246 18 554796 113 216 17 551293 145 2003 112 771719 111 1729 212 699563 1
8 213 53 541370 12 1073 141 637411 16 2589 175 832493 1
15 2620 97 870555 120 2779 115 883824 139 194 118 516862 114 287 42 554632 1
3 1040 79 653489 1- - - - -
Assumptions:
Wind/Weight/Precipitation Distribution
Momentum>435000 ft lb per second
Momentum negatively proportional to Wind/Precip
Goal;
Least “Maximum Speed” required?
Results
Speed Availability100 65%110 80%120 90%130 98%140 99%150 100%160 100%
Availability
50%
60%
70%
80%
90%
100%
110%
100 110 120 130 140 150 160 170
Speed Capability
Ava
ilab
ilit
y
The greater the maximum speed capabilities, the
better availability of the coaster!
Conclusion
• How do you make these go faster?
• What is a failure to the end customer?
• Complete FMECA used to prevent catastrophe