04. Technical Safety Requirement Attributes

L5 09 Technical Safety Requirement Attributes

Table of Results

Requirement ID Technical Safety Requirement FTTI ASIL
TechSafReq01 The LDW safety component shall ensure that the amplitude of the 'LDW_Torque_Request' sent to the 'Final electronic power steering Torque' component is below 'Max_Torque_Amplitude. 50 ms C
TechSafReq02 As soon as the LDW function deactivates the LDW feature, the 'LDW Safety' software block shall send a signal to the car display ECU to turn on a warning light. 50 ms C
TechSafReq03 As soon as a failure is detected by the LDW function, it shall deactivate the LDW feature and the 'LDW_Torque_Request' shall be set to zero. 50 ms C
TechSafReq04 The validity and integrity of the data transmission for 'LDW_Torque_Request' signal shall be ensured. 50 ms C
TechSafReq05 Memory test shall be conducted at start up of the EPS ECU to check for any faults in memory. ignition cycle A

Quiz

ASIL

What would be the ASIL for the technical safety requirements derived for the lane keeping assistance function? Remember that the technical safety requirements inherit the ASIL of the functional safety requirements.

SOLUTION: B

FTTI

What would be a reasonable fault tolerant time interval for the lane keeping assistance function's technical safety requirements?

SOLUTION: 500 mS

Next Concept