ISO/PAS 21448 & Perception Safety

#!/usr/bin/env python3
# SOTIF scenario-based validation: simulation + physical test
import json

# Worst-case scenarios from FIA (Zone 1 candidates)
scenarios = [
    {
        "id": "SC-001",
        "name": "AEB_Glare_Highway_50kmh",
        "description": "AEB with sun glare, highway, lead vehicle at 50 km/h",
        "method": "SIL simulation + HIL test",
        "pass_criterion": "AEB activates within TTC threshold; no false negative",
        "result": "PASS",
        "runs": 500,
    },
    {
        "id": "SC-002",
        "name": "LKA_Junction_OverlapMarkings",
        "description": "Lane keeping at junction with 3 overlapping marking types",
        "method": "Physical test track",
        "pass_criterion": "LKA deactivates or applies < 0.1 Nm corrective torque",
        "result": "FAIL — 2 of 50 runs applied > 0.1 Nm in wrong direction",
        "runs": 50,
    },
    {
        "id": "SC-003",
        "name": "AEB_Overhead_Gantry_80kmh",
        "description": "AEB with overhead gantry at 80 km/h motorway",
        "method": "HIL test",
        "pass_criterion": "No AEB activation for stationary overhead object",
        "result": "PASS",
        "runs": 200,
    },
]

print("SOTIF Validation Campaign Summary:")
passes = sum(1 for s in scenarios if s["result"].startswith("PASS"))
fails  = len(scenarios) - passes
print(f"  PASS: {passes}/{len(scenarios)} | FAIL: {fails}/{len(scenarios)}")
for s in scenarios:
    print(f"  [{s['id']}] {s['name']}: {s['result']} ({s['runs']} runs)")

if fails > 0:
    print("\nFAIL scenarios require Zone 1 mitigation before release.")

/* AEB ODD boundary monitor: detect when operating domain is exceeded */
#include "Dem.h"
#include "Com.h"

typedef struct {
    float32 precipitation_rate_mm_h;
    float32 visibility_m;
    float32 vehicle_speed_kmh;
    float32 ambient_light_lux;
} ODD_Conditions_t;

#define AEB_MAX_PRECIPITATION_MM_H   5.0f
#define AEB_MIN_VISIBILITY_M         100.0f
#define AEB_MAX_SPEED_KMH            200.0f
#define AEB_MIN_LIGHT_LUX            1.0f  /* Headlamp required below this */

AEB_Status_t ODD_Monitor_CheckAEB(const ODD_Conditions_t* conditions)
{
    /* Check each ODD boundary condition */
    if (conditions->precipitation_rate_mm_h > AEB_MAX_PRECIPITATION_MM_H) {
        Dem_ReportErrorStatus(DEM_EVENT_AEB_ODD_RAIN, DEM_EVENT_STATUS_FAILED);
        Com_SendSignal(COM_SIG_AEB_STATUS, AEB_STATUS_DEGRADED);
        return AEB_DEGRADED;
    }
    if (conditions->visibility_m < AEB_MIN_VISIBILITY_M) {
        Dem_ReportErrorStatus(DEM_EVENT_AEB_ODD_VISIBILITY, DEM_EVENT_STATUS_FAILED);
        return AEB_DEGRADED;
    }
    /* All conditions within ODD */
    Dem_ReportErrorStatus(DEM_EVENT_AEB_ODD_RAIN, DEM_EVENT_STATUS_PASSED);
    return AEB_ACTIVE;
}