Functional safety is an important aspect in development of safety-critical systems, unintended behavior of which can present risk of injury or death of humans. Safety-critical systems are prevalent in systems such as airplanes, medical devices and cars.
The goal of functional safety is reduction of risk caused by malfunctions of a system to an acceptable level, defined by the potential risk induced by a system malfunction.
This thesis focuses on ensuring functional safety of electrical systems of road vehicles, based on the international standard for functional safety of road vehicles ISO 26262.
The thesis is centered around the development of a motor control system with safe torque-off (STO) function, which is intended to be used in a car as a part of the LiDAR sensor cleaning system. LiDAR sensor is used for surroundings recognition for adaptive cruise control (ACC) and is considered to be a safety-critical element of the vehicle. Malfunctioning bahaviour of the LiDAR cleaning system may have a negative impact on operation of the LiDAR sensor, therefore, it should conform to appropriate functional safety levels as defined by ISO 26262.
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