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 not need to be excessively upgraded for an existing vehicle model, and the vehicle speed meeting the ASIL D requirement of the whole vehicle level can be achieved through existing resources of the whole vehicle.

    本发明公开了一种基于功能安全需求的车速计算方法及装置,本发明的构思在于,为满足ASIL D级要求,依据车速功能的整体设计架构,同时运用功能安全分析方法,进行安全等级分配。具体是利用车辆已有的多个模块分别计算车速,并结合多个模块的可信度以及当前路况及周边环境,按照多模块的不同安全级别进行权重分配,并以此进行多车速的融合,得到稳定且具有较高精度的目标车速用于后续处理。本发明能够提升车速的安全等级以及稳定性并减少偏差,针对现有车型不需要过度升级软硬件,利用整车现有资源即可实现整车级的ASIL D需求的车速。


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    Title :

    Vehicle speed calculation method and device based on functional safety requirements


    Additional title:

    基于功能安全需求的车速计算方法及装置


    Contributors:
    YE SHENGWEI (author) / HU YANJIAO (author) / JIANG YU (author) / LI DONGHAO (author) / WANG QINGHAI (author) / YUAN XIAOYA (author) / QIAN YAN (author) / LIU JUNSHUAI (author) / REN XIN (author) / LI LEI (author)

    Publication date :

    2021-08-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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