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Reliability and Safety Analysis of Printer Power Management System

This project focuses on the development of a printer power management system using a light sensor integrated with a power indicator LED. It aims to control the printer's power based on light levels, efficiently route incoming print jobs, and manage criticality levels of system components. It employs the PIC32MX795F512H microcontroller, LM3102 voltage regulator, and DK1A-L-3V-F power relay. Reliability analysis parameters yield MTTF values, indicating a comprehensive approach to safety, ensuring optimal functionality and reduced risk of failure in operational environments.

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Reliability and Safety Analysis of Printer Power Management System

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  1. Project PRINTTCSP 8 – Reliability & Safety Analysis Team 8 – Siddharth Bhosale

  2. Project Abstract • Printer power management system. • Use the power indicator LED as a light sensor. • Control printer's power based on light levels. • Route incoming print jobs to local storage/printer.

  3. Criticality Levels • High Criticality • Could lead to user injury • Medium Criticality • Device not working, cannot be repaired • Low Criticality • Repairable problems

  4. Components Chosen • PIC32MX795F512H Microcontroller • High complexity, 64 I/O pins • LM3102 Voltage Regulator • High temperature • Vout greater than 3.6 could burn components • DK1A-L-3V-F Power Relay • Carries 110 VAC • Risk of injury if not handled properly

  5. Reliability Analysis Parameters

  6. PIC32MX795F512H Microcontroller λP = (C1 x πT + C2 x πE) x πQ x πL λP = (0.56 x 0.10 + 0.032 x 2) x 10 x 1 λP = 1.2 Failures / 106 hours of operation MTTF = 1/ λP = 833,333 hours = 95 years

  7. LM3102 Voltage Regulator λP = (C1 x πT + C2 x πE) x πQ x πL λP = (0.010 x 0.10 + 0.0091 x 2) x 10 x 1 λP = 0.192 Failures / 106 hours of operation MTTF = 1/ λP = 5,208,333 hours = 594 years

  8. DK1A-L-3V-F Power Relay λP = (C1 x πT + C2 x πE) x πQ x πL λP = (0.010 x 0.10 + 0.0016 x 2) x 10 x 1 λP = 0.042 Failures / 106 hours of operation MTTF = 1/ λP = 23809524hours = 2716 years

  9. FMECA

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