1 / 9

Reliability and Safety Analysis of Digijock Home Security System

This analysis report delves into the reliability and safety of the Digijock Home Security System. It evaluates critical components such as the microcontroller (MC9S12), voltage translator (74LVC8T245), and voltage regulators, assessing their criticality levels. The report discusses predicted failure modes, causes, and effects, determining the potential reliability of each component. Data indicates that smoke detection has high criticality, while failure rates for all components are calculated, ensuring informed decision making for enhancing home security systems.

jacoba
Télécharger la présentation

Reliability and Safety Analysis of Digijock Home Security System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. D.H.S. Digijock Home Security ECE477 – Team 7: Linda Stefanutti Zach Smith Stuart Pulliam Will Granger

  2. Summary: • Reliability and safety analysis: • Criticality • Components considered • Failure modes: • Causes • Effects Digijock Home Security

  3. Components considered • Microcontroller (MC9S12) • Voltage translator (74LVC8T245) • Voltage regulators Digijock Home Security

  4. Criticality • High criticality: detecting smoke • Medium: inability to activate alarm • Low: user inconvenience • Microcontroller: high • Voltage regulators: 1 high, 1 medium • Voltage translators: medium Digijock Home Security

  5. Microcontroller • Predicted number of failures (λp) • C1 (die complexity): 0.12 (16-bit MOS MCU) • πT(temp coeff.) : 0.49 (45 degrees Celsius) • C2 (const) : 0.025 (hermetic SMT, < 60 pins) • πE (envir. const) : 2.0 (ground fixed) • πL (learning factor) : 1.0 (>2 years) • πQ(quality factor) : 10 (commercial grade) • λp = (C1xπT+C2xπe)xπqxπl = 1.088 failures/106 hours Digijock Home Security

  6. Voltage translator • Predicted number of failures (λp) : • C1 (die complexity): .01 (digtl MOS <100 gates) • πT (temp coeff.) : 0.49 (45 degrees Celsius) • C2 (const) : 0.0087(hermetic SMT, 24 pins) • πE (envir. const) : 2.0 (ground fixed) • πL (learning factor) : 1.0 (>2 years) • πQ(quality factor) : 10 (commercial grade) • λp = (C1xπT+C2xπe)xπqxπl = 0.223 failures/106 hours Digijock Home Security

  7. Voltage regulators • Classification: low frequency diode • Predicted number of failures (λp) • Λb(base failure rate) : 0.0020 (voltage reg) • πT(temp coeff.) : 1.5 (45 degrees Celsius) • πS(electrical stress factor) : 1.0 (voltage reg) • πC (contact constr. factor) : 1.0 (metalurgically bonded) • πQ(quality factor) : 6.0 (plastic) • πE (envir. const) : 6.0 (ground fixed) • λp = λbπTπSπCπQπE = 0.108 failures/106 hours Digijock Home Security

  8. Failuremodes/ effects Digijock Home Security

  9. Questions? Digijock Home Security

More Related