The spreading of SENT protocol (which is intended to allow transmission of high resolution data between sensors and ECUs) created new possibilities to increase the safety integrity level of E/E systems used in automotive industry.
I performed the safety analysis of a position sensor connected to a transmission control unit in my dissertation. First, I presented basic concepts of safety and the ISO 26262 standard then I explained the role of the position sensors in a dual clutch transmission. I followed the required steps by the standard from the concept phase till the level of HW development. I performed the FMEDA for both the analog and the digital sensor concept which is required by the standard as a validation method.
As a result of the FMEDA the analog sensor concept is classified as ASIL B, while the digital sensor concept managed to reach ASIL C.
I got the result which I expected when I started my dissertation. As a conclusion, it can be identified that using a position sensor with SENT interface can increase the automotive safety integrity level of a control unit in a significant way.