Vehicle speed calculation method and device based on functional safety requirements

• Main Authors: YUAN XIAOYA, WANG QINGHAI, REN XIN, QIAN YAN, LI DONGHAO, JIANG YU, YANG GUODONG, LIU JUNSHUAI, YE SHENGWEI, HU YANJIAO, LI LEI
• Format: Patent
• Language: Chinese; English
• Published: 06.08.2021
• Subjects: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

The invention discloses a vehicle speed calculation method and device based on a function safety demand, and the conception of the vehicle speed calculation method is that in order to meet the ASIL D-level requirement, according to the overall design architecture of a vehicle speed function, a function safety analysis method is used for carrying out safety level distribution at the same time. The method specifically comprises the following steps: respectively calculating vehicle speeds by utilizing a plurality of existing modules of a vehicle, carrying out weight distribution according to different safety levels of the plurality of modules in combination with the credibility of the plurality of modules, the current road condition and the surrounding environment, and carrying out multi-vehicle-speed fusion so as to obtain a stable and high-precision target vehicle speed for subsequent processing. The safety level and stability of the vehicle speed can be improved, deviation is reduced, hardware and software do