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FAULT INJECTION CAPTURE — SAFETY MECHANISM TIMING
PLAYBACK 0.05× REAL TIME
SENSOR
WHEEL SPEED · 2ch
FAULT INJECTED — STUCK HIGH
MICROCONTROLLER
ASIL D
APPLICATION SW
SAFETY MONITOR
DIAG · WDG · COMPARATOR
ACTUATOR
TORQUE DEMAND
ADC
PWM
CAPTURE — ACTUATOR DEMAND
DIAG THRESHOLD
NOMINAL OPERATION
SAFETY GOAL — REACH THE SAFE STATE BEFORE THE HAZARDOUS EVENT
SAFE STATE REACHED
168 ms — MARGIN 82 ms — PASS
TIMING DIAGRAM
HAZARDOUS EVENT
DETECTED
SAFE STATE
TIME AFTER FAULT [ms]
t = 0 ms
FDTI — FAULT DETECTION TIME INTERVAL
FRTI — FAULT REACTION TIME INTERVAL
FTTI — FAULT TOLERANT TIME INTERVAL
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CXTECH.ME — C. TRICULESCU
REV. A
FIG. 01 — FTTI VERIFICATION
SH. 1/1
ISO 26262-1:2018 · ISO 13849-1
SI UNITS