Standards and Certifications Offer Guardrails for ADAS Development


According to the SAE website, the document includes more clarification on the distinction between Level 3 and 4, terms and definitions for remote assistance and remote driving, the use of “driver support systems” in Levels 1 and 2, classifying sustained driver automation, and, crucially, “defining and clarifying the concept of failure mitigation strategy.

Other Challenges: From HPC to Heat to Ingress Protection

The challenge of delivering high-performance computing (HPC) within the space, power, and environmental constraints of the automotive environment will be occupying engineers for the foreseeable future. It’s because the readily available ruggedized systems don’t generally offer the kind of performance that’s demanded. But ruggedized systems do provide good mean time between failure (MTBF) numbers.

Certifications, such as E-Mark, ECE ONU R10, ISO 16750, and IEC 60068-2-6/60068-2-27, can be useful in considering system or component reliability. 

Another complication is heat. Generally, the higher the performance of the computing system, the greater its heat output. Given that simple fans and vents can potentially admit moisture, dust, etc., liquid cooling should be a top consideration. While adding weight and complexity, it can also help move heat to a location where its dissipation is easier to achieve.

Ingress protection, for which the International Electrotechnical Commission (IEC) has developed ingress-protection (IP) ratings, can be useful in evaluating or considering enclosure options. For example, IEC 60529 rates resistance of enclosures of electric and electronic devices against the intrusion of dust and liquids as well as for potential hazards to personnel. The standard also defines the tests to ensure an enclosure meets these requirements.

The impact of the power source on ADAS must be carefully considered, too. Will there be an AC charging cycle or high-current-demand cranking duty—either of which could produce voltage and current irregularities? 

Unlike some ruggedized applications, such as in plant automation, the automotive system needs to be a jack of all trades, able to interface with serial port, CAN, CAN FD, FlexRay, LIN, and Ethernet. It must also provide USB 2.0 and 3.0 ports for cameras and both Mini PCIe and PCIe slots for different kinds of hardware. 

Finally, there’s the regulatory environment to consider. While there are generally accepted best practices regarding various levels of ADAS, regional and national peculiarities still must be recognized and accommodated.

And the competition in ADAS is fierce. Though some gearheads may bemoan the demise of the heart-pounding untamed cars of the past, consumers are voting for the convenience and security promised by continued advances in ADAS technology.

Reference

SAE J3016 Recommended Practice: Taxonomy and Definitions for Terms Related to Driving Automation Systems for On-Road Motor Vehicles.



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