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G N M S

G N M S. Safety and Reliability Analysis. Eric Ellett Daniel Grum Larry Price Jason Rice. Abstract.

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G N M S

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  1. GNMS Safety and Reliability Analysis Eric Ellett Daniel Grum Larry Price Jason Rice

  2. Abstract The GNMS (GNMS's Not Microsoft Surface) Touch Surface is a multi-touch enabled table designed specifically for touch-based gaming. The surface utilizes Frustrated Total Internal Reflection [FTIR] technology to create an engrossing computing experience for a fraction of the cost of similar products.

  3. Block Diagram

  4. Low • Low critical failures mean that the user will be inconvenienced in his or her use of the product or certain peripheral features will not work. The main functionality of the product, that of providing an immersive touch interface, will not however be impeded. •  10-6 is the target failure range for this type of failure. • Medium • Product is rendered inoperable in its main functionality. •  10-7 is the target failure range for this type of failure. • High • Product is rendered inoperable and the user is exposed to risk of injury. •  10-9 is the target failure range for this type of failure. Definition of Criticality Levels

  5. AT32UC3B164 • Microcontroller that controls everything on our PCB. • Contains complicated integrated circuits such as ATD convertors, PWM, and 28 input/output pins. • LM3671 • Step-Down DC power convertor that converts 5.0V down to 3.3V. • Has complicated integrated circuitry inside a very small package. • MAX232ECWE • Allows us to send our serial communication out to our motherboard. • Has complicated integrated circuitry. • TIP120 • Controls both of our 200mm cooling fans. • Handles 12.0V and around 40mA of current. Parts Chosen for Analysis

  6. AT32UC3B164 FMECA Analysis

  7. AT32UC3B164 FMECA Analysis

  8. AT32UC3B164 Reliability Analysis • Equation Used: λp =(C1* πT+C2*πe)*πL*πQ • Result: λp=3.72 Failures/10^6 hours

  9. LM3671 FMECA Analysis

  10. Equation Used: λp =(C1* πT+C2*πe)*πL*πQ • Result: λp=5.92 Failures/10^7 hours LM3671 Reliability Analysis

  11. MAX232ECWE FMECA Analysis

  12. MAX232ECWEReliability Analysis • Equation Used: λp =(C1* πT+C2*πe)*πL*πQ • Result: λp=9.52 Failures/10^7 hours

  13. TIP120 FMECA Analysis

  14. Equation Used: λp =λb*πT*πA*πR*πS*πQ*πE • Result: λp=2.915304 Failures/10^7 hours TIP120Reliability Analysis

  15. ?

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