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人形机器人马拉松冠军“天工”开源代码解读1:运行和整体框架

  • 2026-02-05 01:08:14
人形机器人马拉松冠军“天工”开源代码解读1:运行和整体框架

https://github.com/Open-X-Humanoid/TienKung-Lab是北京人形机器人创新中心开源的“天工”人形机器人代码仓库,天工机器人ultra版本在2025北京亦庄半程马拉松获得了冠军,本仓库中使用的是lite版本。

lite
ultra

项目运行

legged_lab/assets/tienkung2_lite/usd下可以找到 usd 文件在 isaac-sim 中看它的结构。

usd

在安装好 isaacsim 和 isaaclab 的前提下,执行下面命令安装 TienKung-Lab 代码。

cd TienKung-Labpip install -e .cd TienKung-Lab/rsl_rlpip install -e .

训练命令python legged_lab/scripts/train.py --task=walk --logger=tensorboard --num_envs=512 --headless。4090 单卡,50000次迭代,需要执行 10 个小时。

TienKung-Lab代码所在路径/logs/任务名称(比如walk)/年月日_时分秒路径下可以看到保存的模型

image

推理命令python legged_lab/scripts/play.py --task=walk --load_run=2026-02-02_14-52-13 --checkpoint=model_10000.pt --num_envs=4。可以在 isaac-sim 中查看训练的效果。

下面三个 gif 分别是模型训练 1000,10000和49900轮的效果。

1000轮的时候还走一走就会倒下。
10000轮的时候已经基本稳定了。

49900轮看起来和10000轮差别不大。


下面开始解读项目代码。首先关注机器人环境配置,启动脚本 train.py 和策略runner。(如果第一次了解 Isaac 系列可以了解一下)IsaacLab 的项目都遵循相同的规范:仿真环境用 task_registry.register 注册;train.py 负责获取配置启动训练,代码在不同的任务中区别不大;train.py 中调用 runner_class,这里实现针对具体任务的算法。

任务启动脚本

--task 参数需要从注册的名称中选

# legged_lab/envs/__init__.pytask_registry.register("walk", TienKungEnv, TienKungWalkFlatEnvCfg(), TienKungWalkAgentCfg())sk_registry.register("run", TienKungEnv, TienKungRunFlatEnvCfg(), TienKungRunAgentCfg())task_registry.register("walk_with_sensor", TienKungEnv, TienKungWalkWithSensorFlatEnvCfg(), TienKungWalkWithSensorAgentCfg())task_registry.register("run_with_sensor", TienKungEnv, TienKungRunWithSensorFlatEnvCfg(), TienKungRunWithSensorAgentCfg()

省去一大堆获取配置项和打日志的代码,核心就是初始化runner类和执行

# legged_lab/scripts/train.pyrunner_class: OnPolicyRunner | AmpOnPolicyRunner = eval(agent_cfg.runner_class_name)runner = runner_class(env, agent_cfg.to_dict(), log_dir=log_dir, device=agent_cfg.device)runner.learn(num_learning_iterations=agent_cfg.max_iterations, init_at_random_ep_len=True)

learn 方法

下面来看rsl_rl/rsl_rl/runners/amp_on_policy_runner.py中learn()的具体实现。

训练前准备

首先随机初始化 episode 长度,目的是让不同的环境处于不同的 episode 阶段,防止机器人每次从头开始学,前面学的好,后面渣渣。这种技术在学术界通常被称为 RSI (Reference State Initialization),由著名的 DeepMimic 论文提出。

if init_at_random_ep_len:    self.env.episode_length_buf = torch.randint_like(        self.env.episode_length_buf, high=int(self.env.max_episode_length)            )

接下来初始化了三个观测状态

  • obs (普通观测): 机器人能够获取到的关节角度,躯干姿态等。用于 Policy(策略网络) 决定下一步该做什么。
  • privileged_obs (特权观测):作为上帝视角,机器人运行中获取不到的数据,比如地面摩擦力等。训练过程中只对 Critic 网络可见,用于评估。
  • amp_obs(Adversarial Motion Prior对抗运动先验):获取运动姿态的数据,用于和人类数据作对比。
 obs, extras = self.env.get_observations() privileged_obs = extras["observations"].get(self.privileged_obs_type, obs) amp_obs = self.env.get_amp_obs_for_expert_trans() obs, privileged_obs, amp_obs = obs.to(self.device), privileged_obs.to(self.device), amp_obs.to(self.device) self.train_mode()  # switch to train mode (for dropout for example)

具体的状态可以在 legged_lab/envs/base/base_env.py 中找到

组成部分
obs
privileged_obs
amp_obs
角速度
 (ang_vel, 3维)
重力投影
 (projected_gravity, 3维)
速度命令
 (command, 3维)
关节位置
 (joint_pos, N维)
✓ (仅四肢)
关节速度
 (joint_vel, N维)
✓ (仅四肢)
上一动作
 (action, N维)
根节点线速度
 (root_lin_vel, 3维)
足端接触力
 (feet_contact, 2维)
手部末端位置
 (hand_pos, 6维)
脚部末端位置
 (foot_pos, 6维)
高度扫描
 (height_scan, H维)

AMP观测详细组成 (48维)

组成部分
维度
描述
右臂关节位置
3
right_arm_dof_pos
左臂关节位置
3
left_arm_dof_pos
右腿关节位置
6
right_leg_dof_pos
左腿关节位置
6
left_leg_dof_pos
右臂关节速度
3
right_arm_dof_vel
左臂关节速度
3
left_arm_dof_vel
右腿关节速度
6
right_leg_dof_vel
左腿关节速度
6
left_leg_dof_vel
左手局部位置
3
相对于根节点
右手局部位置
3
相对于根节点
左脚局部位置
3
相对于根节点
右脚局部位置
3
相对于根节点
总计48

Book keeping 这几个变量用于记录 reward 和 episode 长度。

ep_infos = []rewbuffer = deque(maxlen=100)lenbuffer = deque(maxlen=100)cur_reward_sum = torch.zeros(self.env.num_envs, dtype=torch.float, device=self.device)cur_episode_length = torch.zeros(self.env.num_envs, dtype=torch.float, device=self.device)

训练流程

下面开始正式训练的流程了,看看模型迭代一次做了什么。

rollout 的部分用 with torch.inference_mode(): 套起来,不参与梯度计算。下面的过程每一次模型迭代都要重复 num_steps_per_env (默认值 24)次

动作和状态采样。

actions = self.alg.act(obs, privileged_obs, amp_obs)obs, rewards, dones, infos = self.env.step(actions.to(self.env.device))

获取AMP 特征向量,用于判别器判断动作是否像人类

next_amp_obs = self.env.get_amp_obs_for_expert_trans()

因为当环境重置时,next_amp_obs 实际上是新回合的初始状态,而不是上一回合的终止状态。这里需要用上一回合的终止状态 (terminal_amp_states) 替换重置后新回合的初始状态。

next_amp_obs_with_term = torch.clone(next_amp_obs)reset_env_ids = self.env.reset_env_idsterminal_amp_states = self.env.get_amp_obs_for_expert_trans()[reset_env_ids]next_amp_obs_with_term[reset_env_ids] = terminal_amp_states

计算amp reward

rewards = self.alg.discriminator.predict_amp_reward(                amp_obs, next_amp_obs_with_term, rewards, normalizer=self.alg.amp_normalizer)[0]

记录 reward 和终止标记。

self.alg.process_env_step(rewards, dones, infos, next_amp_obs_with_term)

至此 num_steps_per_env (默认值 24)次 循环结束。计算整个 episode 的 return。

if self.training_type == "rl":    self.alg.compute_returns(privileged_obs)

inference_mode 结束,更新梯度

loss_dict = self.alg.update()

至此已经整体上介绍了训练代码的框架,下一步要深入 rsl_rl/rsl_rl/algorithms/amp_ppo.py 看算法的具体实现。

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  1. CONNECT:[ UseTime:0.000917s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001583s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000711s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000677s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001387s ]
  6. SELECT * FROM `set` [ RunTime:0.015992s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001540s ]
  8. SELECT * FROM `article` WHERE `id` = 472575 LIMIT 1 [ RunTime:0.036164s ]
  9. UPDATE `article` SET `lasttime` = 1770460117 WHERE `id` = 472575 [ RunTime:0.005777s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000687s ]
  11. SELECT * FROM `article` WHERE `id` < 472575 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001248s ]
  12. SELECT * FROM `article` WHERE `id` > 472575 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001141s ]
  13. SELECT * FROM `article` WHERE `id` < 472575 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004427s ]
  14. SELECT * FROM `article` WHERE `id` < 472575 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003605s ]
  15. SELECT * FROM `article` WHERE `id` < 472575 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.066784s ]
0.232358s