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End of preview. Expand in Data Studio

天机双臂折纸盒:按阶段提示词的 SFT 数据(v4)

天机双臂机器人把平铺的纸板折成盒子的示教数据。每条录像按人工标注切成 4 段,每段配一句阶段提示词,用于训练能按提示词逐段执行的 pi0.5 策略(subtask 模型)。

数据为 LeRobot v3.0 格式,三个子目录各是一个独立的数据集根目录。

目录 来源录像 episode 数 其中“保持”样本 帧数
train/ 155 条(10-10 至 10-13) 8,342 7,530 489,456
val_old/ 4 条(10-10 至 10-12 留出) 136 120 8,280
val_1013/ 8 条(10-13 按会话留出) 392 360 20,273

阶段与提示词

段 内容 提示词(task)
1 起后壁、压顶盖 Raise the back wall and press down the top lid.
2 第一侧 Fold the right side. 或 Fold the left side.(按实际先做的一侧)
3 第二侧 另一侧的提示词
4 推盒回位 Push the box back into place.

特征

  • observation.state(20 维):两臂各 10 维,依次为末端位置 xyz、旋转 6D(旋转矩阵前两列 r00 r10 r20 r01 r11 r21)、夹爪命令开合度。A 臂在前,B 臂在后。位姿为拍照时刻的实测末端。
  • action(600 维):从当前帧起按真实时间 15Hz 取 30 步(2 秒)的动作块,每步 20 维,排列同状态,按步展平(第 k 步在 [20k, 20k+20))。动作语义是控制器参考的末端位姿;夹爪是命令值。
  • 图像:observation.images.cam_high(头部,360×640)、cam_left_wrist、cam_right_wrist(腕部,480×640)。
  • 数据集 fps 写的是名义值 10。观测帧保留原始采样:10-10 至 10-12 的录像是 10Hz,10-13 的是 15Hz。时间戳和视频都按名义 10fps 编号;动作块已按真实时间预先算好,不依赖 fps。

构造方式

由 v3 数据(每条整段录像、单一提示词)加人工切段标注生成,规则参照 A1 机器人上验证过的做法,脚本见 scripts/build_v4.py:

  1. 按段拆条:每段单独成一条 episode,每帧配该段提示词。
  2. 段尾截断:动作块中超出本段最后一帧时刻的步,替换为本段最后一帧的第 0 步动作,表示“做完本段、没有收到下一段提示词就停住”。
  3. 切点前移抖动(仅训练集):每个切点随机往前挪 0 到 0.33 秒,挪出的帧配下一段提示词、动作为录像真实动作。
  4. 保持样本:每个人工切点之后 1 秒内的每一帧,单独成一条 1 帧的 episode。画面和状态取自该帧,提示词是上一段的,动作块 30 步全是“两臂保持当前实测位姿、夹爪保持上一段最后的命令”。在 build_report.json 里标为 cf_hold。
  5. 新数据加权:10-13 的 15Hz 录像复制两份,每份抖动独立。
  6. 标注修正:剔除未完成的 4 条(训练集序号 41、49、55、141);按标注员备注改正先做哪侧:训练集 19 改为先左、51 改为先右,val_1013 的 7 改为先左。

每个子目录的 build_report.json 记录了每条 episode 来自哪条源录像的哪几帧、第几段、是正常分段还是保持样本。

归一化统计

norm_stats.json 是训练 subtask 模型时用的归一化统计(与 v3 相同,状态和动作格式一致)。部署时须与模型一起使用。

使用

from huggingface_hub import snapshot_download
from lerobot.datasets.lerobot_dataset import LeRobotDataset

root = snapshot_download("loopeva/tianji-box-subtask-v4", repo_type="dataset")
train = LeRobotDataset("tianji_v4", root=f"{root}/train")

许可证

CC BY-NC 4.0:可自由使用、修改和再分发,须署名,不得用于商业目的。

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