Joe Trefilek Jeff Kubascik Paul Scheffler Matt Rockey Team RAPTORS Remote Avionics Packet Transceiver with Observational Real-Time Sensing Joe Trefilek Jeff Kubascik Paul Scheffler Matt Rockey Safety and Reliability Analysis Presented by Matt Rockey

Critical Safety Issues Plane-Person Collision Plane-Ground Collision Damage Risk Injury Risk Shock Hazard Interference Hazard Injury Risk Annoyance / Possible Injury Risk 1/2/2019 Team RAPTORS

Failure-Prone Components PIC24F Microcontroller (5.48 * 10-6, 20.8 yrs) RF Power MOSFET (1.872 * 10-6, 70 yrs) RF Transceiver (3.16 * 10-6, 36.1 yrs) Linear Regulator 1/2/2019 Team RAPTORS

FMECA Subsystem Analysis FAILURE MODE POSSIBLE CAUSE(S) EFFECTS CRITICALITY uC: Loss of / erroneous device output Code bug, trans-mission error, device failure Loss of control, unanticipated landing at high velocity Critical Power: Short across device (regulator) Device failure System failure, risk of fire or shock, loss of control Transmit: Erroneous output (settings) Code bug, device failure Improper transmit power, frequency Marginal Sensors: Loss of / erroneous output, failure to transmit Device failure, Mechanical failure, code bug Incorrect or no data from sensors given to user Negligible 1/2/2019 Team RAPTORS

Risk Mitigation Design analog redundancy for: RF amplification circuit Power regulator circuit Perform sanity checks on µC output: PWM output to servos and motor UART to transceiver Improve device lifetime by: Incorporating heatsinks Using MIL-SPEC components 1/2/2019 Team RAPTORS