1. 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

2. 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

3. 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

4. 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

5. 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