This invention discloses a physically isolated minimal deterministic safety
actuator and its control method for intelligent driving, belonging to the field of
functional safety technology for intelligent driving. The device adopts a
hardware architecture physically independent of the main decision-making unit, possessing independent power supply and timing. Its runtime
working set is no larger than 10KB, and it has no
operating system or dynamic memory.
Deterministic control is achieved through hardware-fixed logic, with a worst-case
response time of no more than 50ms. The device is equipped with independent sensing paths and hardwired execution interfaces, enabling direct
actuator driving without relying on the
vehicle bus. Cross-domain health monitoring enables multi-node status monitoring and computing
power management. This invention can provide a safety fallback in the event of a
system-wide failure, resisting common-cause failures, meeting ASIL D
functional safety level, and features low cost, small size, easy integration, and suitability for
mass production. It solves the problems of insufficient independence and poor real-time performance of traditional safety islands.