Safety (Electronics) is Still Beating Tom Borninski Autoliv - - PowerPoint PPT Presentation

The Heart of Passive Safety (Electronics) is Still Beating

Tom Borninski Autoliv Electronics America

Passive Safety and Our Naming Problem

With ~15 years and many millions of these “hearts” of passive safety in existence, we still haven’t agreed on a name for our product! Advanced Crash Safety Module Airbag Control Module Airbag Control Unit Airbag ECU Electronic Crash Sensor Occupant Restraint Controller Restraint Control Module Sensing and Diagnostic Module Although our product is sometimes considered to be “mature,” we see that there is still a lot of room for growth.

Warnings Occupant Status Sensors

Passive Safety System

Presence/ Classification

ECU

Onboard crash and inertial measurement sensing, system diagnostics, electronic data recording.

Loops

Load Limiters Airbags Pretensioners

Pressure Sensors

Others: Knee Bolsters, Adaptive Vents, Adaptive Tethers, etc.

Buckle Status Seat Track Position Gyro Sensors: Yaw, Pitch, Roll Acceleration Sensors Acceleration Sensors: X, Y, Z

Data

Radar

Crash Sensing & Inertial Measurement

Satellite Crash Sensors: Acceleration

• r Pressure

ECU X, Y, Z Roll Yaw Pitch Trends:

• Growing number
• Miniaturization
• Integration
• Pedestrian
• Rollover in cars

(FMVSS 226)

ESC Sensors Restraint Control Integration Advantages

Sensor Performance Less drift, better accuracy @ -40 .. +85 °C Sensor Performance Near Center-of-Gravity, less compensation required Sensor Reliability Improved solder joint / component life @ -40 .. +85 °C Vibration No mechanical actuators Alignment Secure/Aligned package typically used Usage Sensors are protected; can be used to improve crash sensing Network Bandwidth Requires transmitting data 100/s (10 ms intervals)

Algorithms

Algorithms will continue to be enhanced by the use of additional “traditional” crash sensors, but also by synergies with inertial measurement and active safety sensors.

How Many Loops?

Today, a typical mid-range vehicle may have 12-16 deployment “loops,” but the count is expected to increase at the high end:

• 7 Driver and passenger airbags with dual stages, vents, and tethers
• 6 Driver and passenger buckle and reel pretensioners, and load limiters
• 1 Collapsible steering column
• 2 Knee airbags
• 7 Belt bags
• 6 Side Curtains with multiple stages
• 4 Side thorax airbags
• 4 Hood lifters
• 1 Windshield airbags
• 2 Active bolts
• 2 Expandable structures
• 1 High voltage cutoff

> 40

Did you say 40?

Electronic Data Recording and eCall

Passive Safety Electronics embody the “black box” data recorder function and provide crash data to the eCall function. Recent developments include:  An SAE committee (J1698) is identifying potential future parameters for EDR.  A NHTSA-sponsored team from Virginia Tech will recommend EDR updates to improve crash reconstruction ability.  An AK-LV standard for EDR is being developed in Germany.

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Scalable Architectures

Full global scalability is expected, from the most basic features to the most advanced: This drives selection of scalable families of microcontrollers, integrated circuits, and sensors.

Loops Satellites Onboard Sensors Communications 4 X/Y HSCAN 8 2 X/Y, Yaw HSCAN 12 4 X/Y/Z, Yaw, Roll HSCAN 16 6 X/Y/Z, Yaw, Roll HSCAN 24 10 X/Y/Z, Yaw, Pitch, Roll FlexRay 32 12 X/X/Y/Y/Z, Yaw, Yaw, Pitch, Roll FlexRay … … … …

Others: Functional Safety and AUTOSAR

Newer industry standards, such ISO-26262 (Functional Safety) and AUTOSAR (the automotive open system architecture for software), have not been fully realized yet across the spectrum of Passive Safety products.  AUTOSAR provides a framework for transferability of functions throughout the vehicle network, but this must work within the constraints

• f Functional Safety.

Challenges:

• Redevelopment versus re-use.
• Efficient implementation.

ISO-26262 “V” Cycle

Communicative Safety Reactive Safety

Automotive Safety Trend

Pyrotechnic actuator intervention to protect people during a crash. The system controls actuators. Warnings to help the driver realize potential hazards before a crash. The driver controls vehicle motion. Vehicle motion actuator intervention to help the driver regain control. The system controls actuators.

Preventive Safety

Actuator intervention based on recognized hazards before a crash. The system controls the actuators.

Safety & Integration Roadmap

Brake ECU

Restraint/ Brake Controller

Integrated Brake + Restraint: 2014

Restraint Control + IMU

ESC IMU Brake ECU

In Serial Production Since 2008

Steering ECU Driveline ECU

Suspension ECU

Radar Radar Radar Vision GPS Radar Radar

Coordinated Motion Control 2018

Radar Radar Brake ECU Safety- Chassis Domain Controller OEM