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OpenClaw 机器人抓取平台搭建全流程详解 | 极客日志
Python AI 算法
OpenClaw 机器人抓取平台搭建全流程详解 在 Ubuntu 系统上搭建 OpenClaw 机器人抓取仿真平台的全流程。内容包括环境准备（Ubuntu, ROS, Gazebo）、Catkin 工作空间创建、机器人 URDF 模型设计、控制器配置、Gazebo 仿真世界构建以及基于 Python 的抓取控制脚本编写。通过编译运行，可实现基础的夹爪抓取仿真测试与调试。
城市逃兵 发布于 2026/4/6 更新于 2026/5/20 前言
OpenClaw 是一个开源的机器人抓取仿真平台，基于 ROS (Robot Operating System) 和 Gazebo 仿真环境。本文将详细讲解如何在 Ubuntu 系统上完整搭建 OpenClaw 开发环境，并进行基础的抓取仿真测试。
一、环境准备与系统配置
1.1 硬件和软件要求
在开始搭建之前，需要确保您的系统满足以下要求：
硬件配置：
CPU：Intel i5 或同等性能以上
内存：至少 8GB（推荐 16GB）
硬盘：至少 50GB 可用空间
显卡：支持 OpenGL 3.3+ 的独立显卡（推荐）
软件环境：
操作系统：Ubuntu 20.04 LTS 或 22.04 LTS
ROS 版本：ROS Noetic（Ubuntu 20.04）或 ROS2 Humble（Ubuntu 22.04）
1.2 安装 Ubuntu 系统
如果您还没有安装 Ubuntu 系统，请按照以下步骤操作：
sudo dd if =ubuntu-20.04.6-desktop-amd64.iso of=/dev/sdb bs=4M status=progress
1.3 系统基础配置
安装完 Ubuntu 后，进行基础配置：
sudo apt update
sudo apt upgrade -y
sudo apt install -y \
build-essential \
cmake \
git \
vim \
curl \
wget \
net-tools \
htop \
terminator
二、ROS 环境搭建
2.1 ROS Noetic 完整安装
sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt install curl curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc | sudo apt-key add -
sudo
sudo
sudo
echo
"source /opt/ros/noetic/setup.bash"
source
sudo
2.2 验证 ROS 安装
roscore
rosrun turtlesim turtlesim_node
rosrun turtlesim turtle_teleop_key
2.3 安装 Gazebo 仿真环境
sudo apt install -y \
gazebo11 \
libgazebo11-dev \
ros-noetic-gazebo-ros-pkgs \
ros-noetic-gazebo-ros-control \
ros-noetic-gazebo-plugins
gazebo --version
三、创建工作空间
3.1 Catkin 工作空间概念 Catkin 是 ROS 的官方构建系统，工作空间是开发 ROS 项目的目录结构：
openclaw_ws/ # 工作空间根目录
├── src/ # 源代码目录
│ ├── CMakeLists.txt # 顶层 CMake 配置（自动生成）
│ ├── openclaw/ # OpenClaw 主包
│ ├── openclaw_msgs/ # 消息定义包
│ ├── openclaw_description/# 机器人描述包
│ ├── openclaw_control/ # 控制器包
│ └── openclaw_gazebo/ # Gazebo 仿真包
├── build/ # 编译中间文件（自动生成）
├── devel/ # 开发文件（自动生成）
│ ├── setup.bash # 工作空间环境变量
│ └── lib/ # 编译生成的库文件
└── install/ # 安装文件（可选）
3.2 创建工作空间
mkdir -p ~/openclaw_ws/src
cd ~/openclaw_ws
catkin_make
ls -la
echo "source ~/openclaw_ws/devel/setup.bash" >> ~/.bashrc
source ~/.bashrc
echo $ROS_PACKAGE_PATH
四、获取 OpenClaw 源代码
4.1 创建代码仓库结构 由于 OpenClaw 可能是一个特定的项目，我们需要创建标准的 ROS 包结构：
cd ~/openclaw_ws/src
catkin_create_pkg openclaw \
roscpp \
rospy \
std_msgs \
geometry_msgs \
sensor_msgs \
control_msgs \
trajectory_msgs
catkin_create_pkg openclaw_msgs \
std_msgs \
geometry_msgs \
message_generation \
message_runtime
catkin_create_pkg openclaw_description \
urdf \
xacro \
robot_state_publisher \
joint_state_publisher \
rviz
catkin_create_pkg openclaw_control \
roscpp \
controller_manager \
joint_trajectory_controller \
position_controllers \
velocity_controllers \
effort_controllers
catkin_create_pkg openclaw_gazebo \
gazebo_ros \
gazebo_ros_control \
gazebo_plugins \
hector_gazebo_plugins
4.2 如果 OpenClaw 已有代码仓库
cd ~/openclaw_ws/src
git clone https://github.com/yourusername/openclaw.git
git clone https://github.com/yourusername/openclaw_msgs.git
git clone https://github.com/yourusername/openclaw_description.git
git clone https://github.com/yourusername/openclaw_control.git
git clone https://github.com/yourusername/openclaw_gazebo.git
git clone https://github.com/yourusername/openclaw_examples.git
五、设计机器人模型
5.1 URDF/XACRO 模型详解 URDF (Unified Robot Description Format) 是 ROS 中描述机器人模型的 XML 格式。我们将创建一个三指夹爪模型：
<?xml version="1.0" ?>
<robot name ="openclaw" xmlns:xacro ="http://www.ros.org/wiki/xacro" >
<xacro:property name ="PI" value ="3.1415926535897931" />
<xacro:property name ="base_width" value ="0.1" />
<xacro:property name ="base_height" value ="0.05" />
<xacro:property name ="finger_length" value ="0.15" />
<xacro:property name ="finger_width" value ="0.02" />
<material name ="black" >
<color rgba ="0.0 0.0 0.0 1.0" />
</material >
<material name ="red" >
<color rgba ="1.0 0.0 0.0 1.0" />
</material >
<material name ="blue" >
<color rgba ="0.0 0.0 1.0 1.0" />
</material >
<link name ="base_link" >
<visual >
<geometry >
<box size ="${base_width} ${base_width} ${base_height}" />
</geometry >
<origin rpy ="0 0 0" xyz ="0 0 0" />
<material name ="black" />
</visual >
<collision >
<geometry >
<box size ="${base_width} ${base_width} ${base_height}" />
</geometry >
</collision >
<inertial >
<mass value ="0.5" />
<inertia ixx ="0.001" ixy ="0" ixz ="0" iyy ="0.001" iyz ="0" izz ="0.001" />
</inertial >
</link >
<link name ="left_finger" >
<visual >
<geometry >
<box size ="${finger_width} ${finger_length} ${finger_width}" />
</geometry >
<origin rpy ="0 0 0" xyz ="0 ${finger_length/2} 0" />
<material name ="red" />
</visual >
<collision >
<geometry >
<box size ="${finger_width} ${finger_length} ${finger_width}" />
</geometry >
</collision >
<inertial >
<mass value ="0.1" />
<inertia ixx ="0.0001" ixy ="0" ixz ="0" iyy ="0.0001" iyz ="0" izz ="0.0001" />
</inertial >
</link >
<link name ="right_finger" >
<visual >
<geometry >
<box size ="${finger_width} ${finger_length} ${finger_width}" />
</geometry >
<origin rpy ="0 0 0" xyz ="0 ${finger_length/2} 0" />
<material name ="blue" />
</visual >
<collision >
<geometry >
<box size ="${finger_width} ${finger_length} ${finger_width}" />
</geometry >
</collision >
<inertial >
<mass value ="0.1" />
<inertia ixx ="0.0001" ixy ="0" ixz ="0" iyy ="0.0001" iyz ="0" izz ="0.0001" />
</inertial >
</link >
<joint name ="left_finger_joint" type ="revolute" >
<parent link ="base_link" />
<child link ="left_finger" />
<origin xyz ="-${base_width/4} ${base_height/2} 0" rpy ="0 0 0" />
<axis xyz ="0 0 1" />
<limit effort ="10" velocity ="1" lower ="-0.5" upper ="0.5" />
<dynamics damping ="0.1" friction ="0.01" />
</joint >
<joint name ="right_finger_joint" type ="revolute" >
<parent link ="base_link" />
<child link ="right_finger" />
<origin xyz ="${base_width/4} ${base_height/2} 0" rpy ="0 0 0" />
<axis xyz ="0 0 1" />
<limit effort ="10" velocity ="1" lower ="-0.5" upper ="0.5" />
<dynamics damping ="0.1" friction ="0.01" />
</joint >
<transmission name ="left_finger_trans" >
<type > transmission_interface/SimpleTransmission</type >
<joint name ="left_finger_joint" >
<hardwareInterface > hardware_interface/PositionJointInterface</hardwareInterface >
</joint >
<actuator name ="left_finger_motor" >
<mechanicalReduction > 1</mechanicalReduction >
</actuator >
</transmission >
<transmission name ="right_finger_trans" >
<type > transmission_interface/SimpleTransmission</type >
<joint name ="right_finger_joint" >
<hardwareInterface > hardware_interface/PositionJointInterface</hardwareInterface >
</joint >
<actuator name ="right_finger_motor" >
<mechanicalReduction > 1</mechanicalReduction >
</actuator >
</transmission >
<gazebo >
<plugin name ="gazebo_ros_control" filename ="libgazebo_ros_control.so" >
<robotNamespace > /openclaw</robotNamespace >
</plugin >
</gazebo >
</robot >
5.2 创建启动文件
<?xml version="1.0" ?>
<launch >
<arg name ="model" default ="$(find openclaw_description)/urdf/claw.xacro" />
<arg name ="gui" default ="true" />
<arg name ="rvizconfig" default ="$(find openclaw_description)/rviz/urdf.rviz" />
<param name ="robot_description" command ="$(find xacro)/xacro '$(arg model)'" />
<node name ="robot_state_publisher" pkg ="robot_state_publisher" type ="robot_state_publisher" >
<param name ="publish_frequency" value ="50.0" />
</node >
<node name ="joint_state_publisher_gui" pkg ="joint_state_publisher_gui" type ="joint_state_publisher_gui" if ="$(arg gui)" />
<node name ="joint_state_publisher" pkg ="joint_state_publisher" type ="joint_state_publisher" unless ="$(arg gui)" />
<node name ="rviz" pkg ="rviz" type ="rviz" args ="-d $(arg rvizconfig)" required ="true" />
</launch >
六、配置控制器
6.1 控制器配置文件
openclaw:
joint_state_controller:
type: joint_state_controller/JointStateController
publish_rate: 50
left_finger_position_controller:
type: position_controllers/JointPositionController
joint: left_finger_joint
pid: {p: 100.0 , i: 0.01 , d: 10.0 }
right_finger_position_controller:
type: position_controllers/JointPositionController
joint: right_finger_joint
pid: {p: 100.0 , i: 0.01 , d: 10.0 }
gripper_controller:
type: position_controllers/JointTrajectoryController
joints:
- left_finger_joint
- right_finger_joint
constraints:
goal_time: 0.5
stopped_velocity_tolerance: 0.05
stop_trajectory_duration: 0.5
state_publish_rate: 25
action_monitor_rate: 10
6.2 控制器启动文件
<?xml version="1.0" ?>
<launch >
<rosparam file ="$(find openclaw_control)/config/control.yaml" command ="load" />
<param name ="robot_description" command ="$(find xacro)/xacro '$(find openclaw_description)/urdf/claw.xacro'" />
<node name ="controller_spawner" pkg ="controller_manager" type ="spawner" output ="screen" args =" joint_state_controller left_finger_position_controller right_finger_position_controller gripper_controller " />
<node name ="robot_state_publisher" pkg ="robot_state_publisher" type ="robot_state_publisher" />
<node name ="joint_state_publisher_gui" pkg ="joint_state_publisher_gui" type ="joint_state_publisher_gui" />
</launch >
七、配置 Gazebo 仿真环境
7.1 Gazebo 世界文件
<?xml version="1.0" ?>
<sdf version ="1.6" >
<world name ="grasping_world" >
<include >
<uri > model://sun</uri >
</include >
<include >
<uri > model://ground_plane</uri >
</include >
<model name ="table" >
<pose > 0 0 0 0 0 0</pose >
<static > true</static >
<link name ="link" >
<collision name ="collision" >
<geometry >
<box >
<size > 1.0 1.0 0.1</size >
</box >
</geometry >
</collision >
<visual name ="visual" >
<geometry >
<box >
<size > 1.0 1.0 0.1</size >
</box >
</geometry >
<material >
<ambient > 0.5 0.5 0.5 1</ambient >
<diffuse > 0.8 0.8 0.8 1</diffuse >
</material >
</visual >
</link >
</model >
<model name ="cube" >
<pose > 0 0 0.05 0 0 0</pose >
<link name ="link" >
<inertial >
<mass > 0.1</mass >
<inertia >
<ixx > 0.0001</ixx >
<ixy > 0</ixy >
<ixz > 0</ixz >
<iyy > 0.0001</iyy >
<iyz > 0</iyz >
<izz > 0.0001</izz >
</inertia >
</inertial >
<collision name ="collision" >
<geometry >
<box >
<size > 0.05 0.05 0.05</size >
</box >
</geometry >
</collision >
<visual name ="visual" >
<geometry >
<box >
<size > 0.05 0.05 0.05</size >
</box >
</geometry >
<material >
<ambient > 1 0 0 1</ambient >
<diffuse > 1 0 0 1</diffuse >
</material >
</visual >
</link >
</model >
<model name ="sphere" >
<pose > 0.2 0 0.05 0 0 0</pose >
<link name ="link" >
<inertial >
<mass > 0.1</mass >
<inertia >
<ixx > 0.0001</ixx >
<ixy > 0</ixy >
<ixz > 0</ixz >
<iyy > 0.0001</iyy >
<iyz > 0</iyz >
<izz > 0.0001</izz >
</inertia >
</inertial >
<collision name ="collision" >
<geometry >
<sphere >
<radius > 0.025</radius >
</sphere >
</geometry >
</collision >
<visual name ="visual" >
<geometry >
<sphere >
<radius > 0.025</radius >
</sphere >
</geometry >
<material >
<ambient > 0 1 0 1</ambient >
<diffuse > 0 1 0 1</diffuse >
</material >
</visual >
</link >
</model >
</world >
</sdf >
7.2 Gazebo 启动文件
<?xml version="1.0" ?>
<launch >
<arg name ="paused" default ="false" />
<arg name ="use_sim_time" default ="true" />
<arg name ="gui" default ="true" />
<arg name ="headless" default ="false" />
<arg name ="debug" default ="false" />
<arg name ="world" default ="$(find openclaw_gazebo)/worlds/grasping.world" />
<param name ="robot_description" command ="$(find xacro)/xacro '$(find openclaw_description)/urdf/claw.xacro'" />
<include file ="$(find gazebo_ros)/launch/empty_world.launch" >
<arg name ="world_name" value ="$(arg world)" />
<arg name ="paused" value ="$(arg paused)" />
<arg name ="use_sim_time" value ="$(arg use_sim_time)" />
<arg name ="gui" value ="$(arg gui)" />
<arg name ="headless" value ="$(arg headless)" />
<arg name ="debug" value ="$(arg debug)" />
</include >
<node name ="spawn_urdf" pkg ="gazebo_ros" type ="spawn_model" args ="-param robot_description -urdf -model openclaw -x 0 -y 0 -z 0.1" />
<include file ="$(find openclaw_control)/launch/control.launch" />
</launch >
八、编写抓取控制程序
8.1 Python 控制脚本
import rospy
import actionlib
from control_msgs.msg import FollowJointTrajectoryAction, FollowJointTrajectoryGoal
from trajectory_msgs.msg import JointTrajectoryPoint
from std_msgs.msg import Float64
import sys
import time
class OpenClawGraspController :
"""OpenClaw 抓取控制器"""
def __init__ (self ):
rospy.init_node('openclaw_grasp_controller' , anonymous=True )
self .left_finger_joint = 'left_finger_joint'
self .right_finger_joint = 'right_finger_joint'
self .left_finger_pub = rospy.Publisher(
'/openclaw/left_finger_position_controller/command' , Float64, queue_size=10
)
self .right_finger_pub = rospy.Publisher(
'/openclaw/right_finger_position_controller/command' , Float64, queue_size=10
)
self .client = actionlib.SimpleActionClient(
'/openclaw/gripper_controller/follow_joint_trajectory' , FollowJointTrajectoryAction
)
rospy.loginfo("等待控制器服务器..." )
self .client.wait_for_server()
rospy.loginfo("控制器服务器已连接" )
rospy.sleep(1.0 )
def open_gripper (self ):
"""打开夹爪"""
rospy.loginfo("打开夹爪" )
self .left_finger_pub.publish(-0.5 )
self .right_finger_pub.publish(0.5 )
rospy.sleep(2.0 )
def close_gripper (self ):
"""闭合夹爪"""
rospy.loginfo("闭合夹爪" )
self .left_finger_pub.publish(0.5 )
self .right_finger_pub.publish(-0.5 )
rospy.sleep(2.0 )
def grasp_object (self, force=0.3 ):
"""抓取物体（带力控制）"""
rospy.loginfo("开始抓取物体，力度：%.2f" , force)
steps = 10
for i in range (steps):
left_angle = -0.5 + (i / steps) * 1.0
right_angle = 0.5 - (i / steps) * 1.0
self .left_finger_pub.publish(left_angle)
self .right_finger_pub.publish(right_angle)
rospy.sleep(0.1 )
rospy.loginfo("抓取完成" )
def release_object (self ):
"""释放物体"""
rospy.loginfo("释放物体" )
self .open_gripper()
def trajectory_grasp (self ):
"""使用轨迹控制进行抓取（更平滑的运动）"""
rospy.loginfo("使用轨迹控制进行抓取" )
goal = FollowJointTrajectoryGoal()
goal.trajectory.joint_names = [
self .left_finger_joint,
self .right_finger_joint
]
point1 = JointTrajectoryPoint()
point1.positions = [-0.5 , 0.5 ]
point1.time_from_start = rospy.Duration(1.0 )
point2 = JointTrajectoryPoint()
point2.positions = [0.5 , -0.5 ]
point2.time_from_start = rospy.Duration(3.0 )
goal.trajectory.points.append(point1)
goal.trajectory.points.append(point2)
self .client.send_goal(goal)
self .client.wait_for_result()
result = self .client.get_result()
rospy.loginfo("轨迹执行结果：%s" , result)
def multi_stage_grasp (self ):
"""多阶段抓取策略"""
rospy.loginfo("执行多阶段抓取" )
rospy.loginfo("阶段 1：预抓取位置" )
self .left_finger_pub.publish(-0.3 )
self .right_finger_pub.publish(0.3 )
rospy.sleep(1.0 )
rospy.loginfo("阶段 2：接近物体" )
for angle in [-0.4 , -0.2 , 0.0 , 0.2 ]:
self .left_finger_pub.publish(angle)
self .right_finger_pub.publish(-angle)
rospy.sleep(0.5 )
rospy.loginfo("阶段 3：施加抓取力" )
self .left_finger_pub.publish(0.4 )
self .right_finger_pub.publish(-0.4 )
rospy.sleep(1.0 )
rospy.loginfo("阶段 4：保持抓取" )
rospy.sleep(2.0 )
rospy.loginfo("阶段 5：释放" )
self .open_gripper()
def main ():
"""主函数"""
try :
controller = OpenClawGraspController()
if len (sys.argv) > 1 :
mode = sys.argv[1 ]
else :
mode = "simple"
rospy.loginfo("执行模式：%s" , mode)
if mode == "simple" :
controller.open_gripper()
rospy.sleep(1.0 )
controller.close_gripper()
rospy.sleep(1.0 )
controller.open_gripper()
elif mode == "grasp" :
controller.open_gripper()
rospy.sleep(1.0 )
controller.grasp_object(force=0.5 )
rospy.sleep(2.0 )
controller.release_object()
elif mode == "trajectory" :
controller.trajectory_grasp()
elif mode == "multistage" :
controller.multi_stage_grasp()
else :
rospy.loginfo("未知模式，使用默认模式" )
controller.open_gripper()
rospy.sleep(1.0 )
controller.close_gripper()
rospy.loginfo("抓取演示完成" )
except rospy.ROSInterruptException:
rospy.loginfo("程序被中断" )
except Exception as e:
rospy.logerr("发生错误：%s" , str (e))
if __name__ == '__main__' :
main()
8.2 创建启动文件
<?xml version="1.0" ?>
<launch >
<include file ="$(find openclaw_gazebo)/launch/gazebo.launch" />
<node name ="grasp_demo" pkg ="openclaw_examples" type ="grasp_object.py" output ="screen" required ="true" >
<param name ="grasp_force" value ="0.5" />
<param name ="grasp_speed" value ="0.1" />
</node >
<node name ="rviz" pkg ="rviz" type ="rviz" args ="-d $(find openclaw_description)/rviz/openclaw.rviz" />
</launch >
九、编译和运行
9.1 编译工作空间
cd ~/openclaw_ws
rosdep install --from-paths src --ignore-src -r -y
catkin_make -j4
catkin_make -j1
catkin_make --only-pkg-with-deps openclaw_control
catkin_make clean
catkin_make
9.2 运行仿真
source ~/openclaw_ws/devel/setup.bash
roslaunch openclaw_gazebo gazebo.launch
source ~/openclaw_ws/devel/setup.bash
rosrun openclaw_examples grasp_object.py simple
rosrun openclaw_examples grasp_object.py grasp
rosrun openclaw_examples grasp_object.py trajectory
rosrun openclaw_examples grasp_object.py multistage
9.3 使用 RViz 可视化
source ~/openclaw_ws/devel/setup.bash
rosrun rviz rviz
十、调试和监控
10.1 查看 ROS 信息
rosnode list
rostopic list
rosservice list
rosparam list
rostopic echo /openclaw/joint_states
rostopic hz /openclaw/joint_states
rostopic bw /openclaw/joint_states
10.2 使用 rqt 工具
rqt
rqt_graph
rqt_plot /openclaw/joint_states/position[0]
10.3 记录和回放数据
rosbag record -a -o grasp_demo.bag
rosbag record /openclaw/joint_states /openclaw/gripper_controller/state
rosbag info grasp_demo.bag
rosbag play grasp_demo.bag
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