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  • Actuator Design Trends for Functional Safety Systems in Electric and Autonomous Vehicles

    • SLYY183A january   2020  – january 2020 DRV3245Q-Q1 , TPS653853-Q1

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  • Actuator Design Trends for Functional Safety Systems in Electric and Autonomous Vehicles
  1.   1
  2.   Overview
  3.   Welcoming the by-wire era – this time with trust
  4.   “Fail-safe” systems transition to “fail-operational” systems
  5.   Electrification of the powertrain and the added considerations for functional safety
  6.   Functional safety in high-temperature applications
  7.   Human factors
  8.   Meeting the challenges of evolving functional safety systems
  9.   Related content
  10. IMPORTANT NOTICE
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Marketing White Paper

Actuator Design Trends for Functional Safety Systems in Electric and Autonomous Vehicles

Analog components developed for functional safety applications are enabling the creation of sophisticated electrical actuation systems for electrified, by-wire and fail-operational vehicle architectures.

Four automotive trends – connected, autonomous, shared and electric, also known as CASE – are the most exciting automotive developments since the first Model-T rolled off the assembly line over a century ago. Cleaner, safer and more efficient cars will keep cities clean while reducing our dependence on nonrenewable energy sources.

These trends are intersecting in an interesting way at the powertrain and chassis architectural levels. Traditional driver-directed functions are being replaced with automated functions that have the intelligence to operate in safer, more efficient ways. In this white paper, I focus on the impact of CASE trends on electrically actuated systems.

Welcoming the by-wire era – this time with trust

Technologies like steer-by-wire, brake-by-wire, shift-by-wire and electrified powertrains present a whole new set of exciting challenges for designers of these systems. The transition to electrical actuation of vehicle functions inherently means fewer mechanical components, which in turn reduces weight, eliminates common mechanical failure modes and enables the integration of smart features. For example, a steer-by-wire system that can intelligently adapt steering responses to road and weather conditions will improve vehicle dynamics and increase efficiency.

Another example is automatic shift and shift-by-wire technology, where an electrical actuator handles the transmission’s shift functionality in conjunction with the most efficient operating points of the engine. These systems have a safety benefit of helping prevent inactive or parked vehicles from rolling forward or backward.

Figure 1 shows actuators in a by-wire system that includes steering, transmission and breaking.

Although the hardware and software components required for by-wire systems have been available for several years, trust from consumers has been elusive.

GUID-4A5C9355-FC8C-48AD-96BF-D3B140362470-low.png Figure 1 Automotive Actuators That Will Transition to By-wire Control – Steering, Braking and Transmission – Can Benefit from Using TI Motor Drivers for Functional Safety Applications.

 

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