当前位置:首页>自动驾驶>博世x清华 DiffVLA:面向自动驾驶的视觉语言引导扩散规划

博世x清华 DiffVLA:面向自动驾驶的视觉语言引导扩散规划

  • 2026-08-13 06:41:54
博世x清华 DiffVLA:面向自动驾驶的视觉语言引导扩散规划

本篇论文出发点:

端到端自动驾驶因“全可微、模块一体化优化”的优势,已成为研究热点,但现在端到端方法存在三个问题:

1.昂贵的bev计算:稠密bev计算开销大

2.动作多样性缺失,UniAD/VAD 回归单模态轨迹,忽略驾驶行为固有的多模态性与不确定性

3.复杂场景决策次优:在真实复杂场景中决策质量不佳

作者认为:扩散模型能建模多模态输出,VLM能提供高层驾驶决策常识,sparse表示能降低计算成本,三者各有优势但单独不足以同时解决上述三点。于是提出DiffVLA,把VLM高层引导+稀疏-稠密混合感知+截断扩散规划组合成一个框架。

本文主要贡献:

论文声明的三大组件:

1. VLM Guidance Module:基于Senna-VLM,输入多视角图像,输出高层驾驶指令(横向/纵向控制 one-hot 编码),与外部导航指令融合后作为扩散规划的语义引导。

2.Hybrid Perception Module:稀疏分支(Sparse4D-v3+SparseMEXT,输出3D框与地图矢量)+ 稠密分支(BEVDet式BEV投影,128×128网格、64×64m范围)。显式信息用于碰撞检测与可行驶区域检查,隐式信息用于轨迹扩散引导。

3.Diffusion-Based Planning Module:基于DiffusionDrive的截断扩散策略,k-means构造轨迹词表V,32个 anchor,缩短扩散schedule,并设计分层信息编码融合异构输入。

4.本文方法与相关方法对比

维度

UniAD

VAD

SparseDrive

DiffusionDrive

Senna

DiffVLA

感知表示

稠密 BEV

向量化

稀疏实例

稠密 BEV

端到端+VLM

稀疏+稠密混合

轨迹建模

单模态回归

单模态回归

单模态 + 多模态选择

多模态扩散

单模态(VLM 给 meta-action)

多模态截断扩散

VLM 引导

有(自然语言 meta-action)

有(one-hot 指令)

训练方式

端到端联合

端到端联合

两阶段

端到端

VLM 与 E2E 解耦训练

多模块分别训练(受时间限制)

Benchmark

nuScenes

nuScenes

nuScenes

NAVSIM v1

nuScenes/DriveX

NAVSIM v2(含反应式 stage-2)

知识点介绍:

VLM解耦引导(Senna范式)VLM不直接输出精确数值轨迹,而是输出高层决策(横向:变道/转弯;纵向:加速/制动),再由端到端模型生成精确轨迹

本文方法介绍:

  • 左侧多视角图像输入分两路上行:一路进Senna-VLM(ViT-L/14 +Driving Vision Adaptor + Vicuna-7B)产生高层指令;另一路进混合感知(稀疏 Sparse4D/SparseMEXT 出 3D 框+地图矢量;稠密BEVDet出BEV特征)。

  • VLM指令与外部导航指令经command encoder融合,与稀疏显式引导 z_e、稠密隐式引导 z_i 一起作为条件,输入截断扩散轨迹解码器,输出 32 个 anchor 的预测轨迹与分类得分。

  • 显式3D框/地图矢量另支路用于碰撞检测与可行驶域检查,对候选轨迹做后筛。

  • 该图支撑论文"VLM+混合感知+扩散规划三模块协同"的核心主张,但图本身未体现训练阶段冻结策略与 2% 减速后处理。

总结:

1.好的点

a)工程整合度高,把稀疏感知、稠密感知、VLM引导、截断扩散四个方向拼成一个能跑通NAVSIM v2反应式评测的完整系统。

b)稀疏+稠密互补、显式信息用于碰撞检测/可行驶域检查的设计务实可解释。

2.不好的点

a)零消融、零基线对比,贡献无法归因——方法学不达标。

b)"全可微端到端"动机与"分模块分别训练"实现自相矛盾。

DiffVLA: Vision-Language Guided Diffusion Planning for Autonomous Driving

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  1. CONNECT:[ UseTime:0.000974s ] mysql:host=127.0.0.1;port=3306;dbname=e_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001406s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000540s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000667s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001223s ]
  6. SELECT * FROM `set` [ RunTime:0.000479s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001366s ]
  8. SELECT * FROM `article` WHERE `id` = 538575 LIMIT 1 [ RunTime:0.000923s ]
  9. UPDATE `article` SET `lasttime` = 1786658645 WHERE `id` = 538575 [ RunTime:0.007360s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000531s ]
  11. SELECT * FROM `article` WHERE `id` < 538575 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000909s ]
  12. SELECT * FROM `article` WHERE `id` > 538575 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000994s ]
  13. SELECT * FROM `article` WHERE `id` < 538575 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001662s ]
  14. SELECT * FROM `article` WHERE `id` < 538575 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005836s ]
  15. SELECT * FROM `article` WHERE `id` < 538575 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003235s ]
0.110943s