Reliability & Safety Analysis

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Presentation transcript:

Reliability & Safety Analysis Team 6

Definition of Criticality High – Failures that violate the safety of the user Medium– Failures that cause damage to the system Low – Failures that inconvenience the user

Parts Chosen For Analysis NCV4274 (+3.3V Linear Regulator) MC78M05 (+5V Linear Regulator) dsPic33FJ256GP (Microcontroller) CS4202 (Audio Codec)

FMECA Chart # Failure Mode Cause Effects Detection Criticality A1 0V on 3.3V output Failure of 3.3V regulator System stops functioning Observation Low A2 0V on 5V output Failure of 5V regulator A3 Output = Input of 3.3V Regulator System heats up, damages components, catches fire Observation, Feeling or smelling burning High A4 Output = Input of 5V Regulator Observation, Feeling or smelling burning B1 PWM Signal Remains Active Failure of dsPic Motors run continuously, string may break C1 Audio input = 0V Failure of audio codec System never tries to tune

Questions