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• 社区&开源

  社区运营&开源工具

  学习资源 社区运营 一键安装 FishROS2GO
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  3

  @minato6 找到了一个原因，在moveit2_tutorials.repos文件中
  moveit_task_constructor:
  type: git
  url: https://gh-proxy.com/github.com/ros-planning/moveit_task_constructor.git
  version: humble
  的version在教程里是ros2，换成humble，这个功能包就能编译通过了。

• 产品&店铺

  鱼香ROS 店铺&产品相关问题

  FishBot二驱机器人 FishBot四驱机器人V2 多协议传输控制器
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  2

  树莓派安装Ubuntu22.04通过有线方式读雷达数据一直报绑定不上串口驱动
  报错如下图
  IMG_20250710_092921.jpg
  之后在终端打印驱动加载日志，命令 sudo dmesg | grep ttyUSB0，输出如下:
  [ 5.584720] usb 1-1.3: ch341-uart converter now attached to ttyUSB0
  [ 8.770364] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
  无法连接ttyUSB0
  之后询问AI说是驱动冲突问题，用以下命令解决:
  sudo systemctl stop brltty ModemManager
  sudo systemctl disable brltty ModemManager
  sudo apt purge brltty -y
  sudo reboot

• VIP问答专区

  针对社区VIP用户问答专区

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  2

  e1d744a8-c2f1-4092-a3c9-63c5000e7532-ccadef6b-38e3-4d46-a578-a643ddc21c77.png

  下面是我的代码
  import launch
  import launch_ros
  from ament_index_python.packages import get_package_share_directory
  import os
  import launch_ros.parameter_descriptions

  def generate_launch_description():
  urdf_package_path=get_package_share_directory('fishbot_description')
  default_urdf_path=os.path.join(urdf_package_path,'urdf','first_robot.urdf')

  action_declare_arg_mode_path=launch.actions.DeclareLaunchArgument( name='model',default_value=str(default_urdf_path),description='加载的模型文件路径' ) substitutions_result=launch.substitutions.Command(['cat ',launch.substitutions.launch_configuration('model')]) robot_description_value=launch_ros.parameter_descriptions.ParameterValue(substitutions_result,value_type=str) action_robot_state_publisher=launch_ros.actions.Node( package='robot_state_publisher', executable='robot_state_publisher', parameters=[{'robot_description':robot_description_value}] ) action_joint_state_publisher=launch_ros.actions.Node( package='joint_state_publisher', executable='joint_state_publisher', ) action_rviz_node=launch_ros.actions.Node( package='rviz2', executable='rviz2', ) return launch.launch_description([ action_declare_arg_mode_path, action_robot_state_publisher, action_joint_state_publisher, action_rviz_node, ])
• ROS2机器人开发：从入门到实践

  《ROS2机器人开发：从入门到实践》书籍配套资料答疑专区

  ROS 2相关问题
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  7

  按照配套视频2.1.1节写代码，ctrl+c退出后生成日志：
  [main:7]:Hello Python Node!
  ^CTraceback (most recent call last):
  File "/home/aokawayou/chapt2/ros2_python_node.py", line 12, in <module>
  main()
  File "/home/aokawayou/chapt2/ros2_python_node.py", line 8, in main
  rclpy.spin(node)
  File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/init.py", line 226, in spin
  executor.spin_once()
  File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 751, in spin_once
  self._spin_once_impl(timeout_sec)
  File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 740, in _spin_once_impl
  handler, entity, node = self.wait_for_ready_callbacks(timeout_sec=timeout_sec)
  File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 723, in wait_for_ready_callbacks
  return next(self._cb_iter)
  File "/opt/ros/humble/local/lib/python3.10/dist-packages/rclpy/executors.py", line 620, in _wait_for_ready_callbacks
  wait_set.wait(timeout_nsec)
  KeyboardInterrupt
  然后ros2 node list显示为空，请问是怎么回事，问deepseek说是什么防火墙配置有问题，但按他生成的代码改还是会报错

• 综合问题

  综合问题讨论版块 | 版主 @吴凯荣 @小鱼

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  8

  机械臂关节采用JointTrajectoryController控制器，但是运行时总是无法加载yaml文件中相关参数

  controller_manager: ros__parameters: update_rate: 100 # Hz dm_joint_state_broadcaster: type: joint_state_broadcaster/JointStateBroadcaster dm_arm_controller: type: joint_trajectory_controller/JointTrajectoryController joints: - joint1 - joint2 - joint3 - joint4 - joint5 - joint6 command_interfaces: - position - velocity state_interfaces: - position - velocity action_name: follow_joint_trajectory interpolation_method: splines constraints: stopped_velocity_tolerance: 0.05 goal_time: 0.0 joint1: trajectory: 0.1 goal: 0.05 joint2: trajectory: 0.1 goal: 0.05 joint3: trajectory: 0.1 goal: 0.05 joint4: trajectory: 0.1 goal: 0.05 joint5: trajectory: 0.1 goal: 0.05 joint6: trajectory: 0.1 goal: 0.05 dm_hand_controller: type: joint_trajectory_controller/JointTrajectoryController joints: - joint7 command_interfaces: - position - velocity state_interfaces: - position - velocity action_name: follow_joint_trajectory interpolation_method: splines constraints: stopped_velocity_tolerance: 0.05 goal_time: 0.0 joint7: trajectory: 0.1 goal: 0.05

  launch文件中加载参数

  controller_manager_node = launch_ros.actions.Node( package='controller_manager', executable='ros2_control_node', name='controller_manager', parameters=[ {'robot_description': robot_description_value}, ros2_control_yaml_path ], output='screen' )

  启动信息

  [INFO] [launch]: All log files can be found below /home/hizaml/.ros/log/2025-07-09-22-24-00-351696-Hizam-82561 [INFO] [launch]: Default logging verbosity is set to INFO [INFO] [robot_state_publisher-1]: process started with pid [82563] [INFO] [rviz2-2]: process started with pid [82565] [INFO] [ros2_control_node-3]: process started with pid [82567] [robot_state_publisher-1] [INFO] [1752071040.539492469] [robot_state_publisher]: got segment base_link [robot_state_publisher-1] [INFO] [1752071040.539638296] [robot_state_publisher]: got segment dummy [robot_state_publisher-1] [INFO] [1752071040.539650469] [robot_state_publisher]: got segment link1 [robot_state_publisher-1] [INFO] [1752071040.539655158] [robot_state_publisher]: got segment link2 [robot_state_publisher-1] [INFO] [1752071040.539659015] [robot_state_publisher]: got segment link3 [robot_state_publisher-1] [INFO] [1752071040.539662822] [robot_state_publisher]: got segment link4 [robot_state_publisher-1] [INFO] [1752071040.539666589] [robot_state_publisher]: got segment link5 [robot_state_publisher-1] [INFO] [1752071040.539670186] [robot_state_publisher]: got segment link6 [robot_state_publisher-1] [INFO] [1752071040.539673713] [robot_state_publisher]: got segment link7_1 [robot_state_publisher-1] [INFO] [1752071040.539677460] [robot_state_publisher]: got segment link7_2 [robot_state_publisher-1] [INFO] [1752071040.539681137] [robot_state_publisher]: got segment link_hand [rviz2-2] QStandardPaths: wrong permissions on runtime directory /run/user/1000/, 0755 instead of 0700 [ros2_control_node-3] [WARN] [1752071040.549684168] [controller_manager]: [Deprecated] Passing the robot description parameter directly to the control_manager node is deprecated. Use '~/robot_description' topic from 'robot_state_publisher' instead. [ros2_control_node-3] [INFO] [1752071040.550035775] [resource_manager]: Loading hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071040.550712710] [resource_manager]: Initialize hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071040.550881711] [DmArmHardware]: 对了，对了！！！关节数为：7 [ros2_control_node-3] [INFO] [1752071040.553177870] [DmArmHardware]: hardware initialize successfully [ros2_control_node-3] [INFO] [1752071040.553246200] [resource_manager]: Successful initialization of hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071040.553414089] [resource_manager]: 'configure' hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071040.553424699] [resource_manager]: Successful 'configure' of hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071040.553430690] [resource_manager]: 'activate' hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071041.254576291] [DmArmHardware]: all motors enable successfully [ros2_control_node-3] [INFO] [1752071041.254646475] [resource_manager]: Successful 'activate' of hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071041.261977552] [controller_manager]: update rate is 100 Hz [ros2_control_node-3] [INFO] [1752071041.262037335] [controller_manager]: Spawning controller_manager RT thread with scheduler priority: 50 [ros2_control_node-3] [WARN] [1752071041.262176690] [controller_manager]: No real-time kernel detected on this system. See [https://control.ros.org/master/doc/ros2_control/controller_manager/doc/userdoc.html] for details on how to enable realtime scheduling. [rviz2-2] [INFO] [1752071043.449363084] [rviz2]: Stereo is NOT SUPPORTED [rviz2-2] [INFO] [1752071043.449661230] [rviz2]: OpenGl version: 4.2 (GLSL 4.2) [rviz2-2] [INFO] [1752071043.506870636] [rviz2]: Stereo is NOT SUPPORTED [INFO] [spawner-4]: process started with pid [82676] [ros2_control_node-3] [INFO] [1752071044.152492026] [controller_manager]: Loading controller 'dm_joint_state_broadcaster' [ros2_control_node-3] [WARN] [1752071044.157073422] [rcl.logging_rosout]: Publisher already registered for provided node name. If this is due to multiple nodes with the same name then all logs for that logger name will go out over the existing publisher. As soon as any node with that name is destructed it will unregister the publisher, preventing any further logs for that name from being published on the rosout topic. [spawner-4] [INFO] [1752071044.202711759] [spawner_dm_joint_state_broadcaster]: Loaded dm_joint_state_broadcaster [ros2_control_node-3] [INFO] [1752071044.206101538] [controller_manager]: Configuring controller 'dm_joint_state_broadcaster' [ros2_control_node-3] [INFO] [1752071044.206280608] [controller_manager]: 'joints' or 'interfaces' parameter is empty. All available state interfaces will be published [spawner-4] [INFO] [1752071044.244925844] [spawner_dm_joint_state_broadcaster]: Configured and activated dm_joint_state_broadcaster [INFO] [spawner-4]: process has finished cleanly [pid 82676] [INFO] [spawner-5]: process started with pid [82708] [ros2_control_node-3] [INFO] [1752071046.141788692] [controller_manager]: Loading controller 'dm_arm_controller' [ros2_control_node-3] [WARN] [1752071046.148223692] [rcl.logging_rosout]: Publisher already registered for provided node name. If this is due to multiple nodes with the same name then all logs for that logger name will go out over the existing publisher. As soon as any node with that name is destructed it will unregister the publisher, preventing any further logs for that name from being published on the rosout topic. [ros2_control_node-3] [WARN] [1752071046.163136248] [controller_manager]: [Deprecated]: "allow_nonzero_velocity_at_trajectory_end" is set to true. The default behavior will change to false. [spawner-5] [INFO] [1752071046.188710095] [spawner_dm_arm_controller]: Loaded dm_arm_controller [ros2_control_node-3] [INFO] [1752071046.190602551] [controller_manager]: Configuring controller 'dm_arm_controller' [ros2_control_node-3] [WARN] [1752071046.190727137] [controller_manager]: 'joints' parameter is empty. [ros2_control_node-3] [INFO] [1752071046.190740211] [controller_manager]: No specific joint names are used for command interfaces. Using 'joints' parameter. [ros2_control_node-3] [ERROR] [1752071046.190745992] [controller_manager]: 'command_interfaces' parameter is empty. [ros2_control_node-3] [ERROR] [1752071046.190754288] [controller_manager]: After configuring, controller 'dm_arm_controller' is in state 'unconfigured' , expected inactive. [spawner-5] [ERROR] [1752071046.191433815] [spawner_dm_arm_controller]: Failed to configure controller [ERROR] [spawner-5]: process has died [pid 82708, exit code 1, cmd '/opt/ros/humble/lib/controller_manager/spawner dm_arm_controller --controller-manager controller_manager --ros-args']. [INFO] [spawner-6]: process started with pid [82725] [ros2_control_node-3] [INFO] [1752071047.126284023] [controller_manager]: Loading controller 'dm_hand_controller' [ros2_control_node-3] [WARN] [1752071047.126583410] [rcl.logging_rosout]: Publisher already registered for provided node name. If this is due to multiple nodes with the same name then all logs for that logger name will go out over the existing publisher. As soon as any node with that name is destructed it will unregister the publisher, preventing any further logs for that name from being published on the rosout topic. [ros2_control_node-3] [WARN] [1752071047.140239527] [controller_manager]: [Deprecated]: "allow_nonzero_velocity_at_trajectory_end" is set to true. The default behavior will change to false. [spawner-6] [INFO] [1752071047.157263783] [spawner_dm_hand_controller]: Loaded dm_hand_controller [ros2_control_node-3] [INFO] [1752071047.159341579] [controller_manager]: Configuring controller 'dm_hand_controller' [ros2_control_node-3] [WARN] [1752071047.159564711] [controller_manager]: 'joints' parameter is empty. [ros2_control_node-3] [INFO] [1752071047.159711239] [controller_manager]: No specific joint names are used for command interfaces. Using 'joints' parameter. [ros2_control_node-3] [ERROR] [1752071047.159722059] [controller_manager]: 'command_interfaces' parameter is empty. [ros2_control_node-3] [ERROR] [1752071047.159741316] [controller_manager]: After configuring, controller 'dm_hand_controller' is in state 'unconfigured' , expected inactive. [spawner-6] [ERROR] [1752071047.160704752] [spawner_dm_hand_controller]: Failed to configure controller [ERROR] [spawner-6]: process has died [pid 82725, exit code 1, cmd '/opt/ros/humble/lib/controller_manager/spawner dm_hand_controller --controller-manager controller_manager --ros-args']. ^C[WARNING] [launch]: user interrupted with ctrl-c (SIGINT) [rviz2-2] [INFO] [1752071595.186616144] [rclcpp]: signal_handler(signum=2) [robot_state_publisher-1] [INFO] [1752071595.186621174] [rclcpp]: signal_handler(signum=2) [ros2_control_node-3] [INFO] [1752071595.186613069] [rclcpp]: signal_handler(signum=2) [ros2_control_node-3] [INFO] [1752071595.186994806] [controller_manager]: Shutdown request received.... [ros2_control_node-3] [INFO] [1752071595.187377965] [controller_manager]: Shutting down all controllers in the controller manager. [ros2_control_node-3] [INFO] [1752071595.187514445] [controller_manager]: Deactivating controller 'controller_manager' [ros2_control_node-3] [INFO] [1752071595.187616679] [controller_manager]: Shutting down controller 'controller_manager' [ros2_control_node-3] [INFO] [1752071595.187846415] [controller_manager]: Shutting down controller 'controller_manager' [ros2_control_node-3] [INFO] [1752071595.187911499] [controller_manager]: Shutting down controller 'controller_manager' [ros2_control_node-3] [INFO] [1752071595.188175932] [resource_manager]: 'deactivate' hardware 'DmArmHardware' [INFO] [robot_state_publisher-1]: process has finished cleanly [pid 82563] [INFO] [rviz2-2]: process has finished cleanly [pid 82565] [ros2_control_node-3] [INFO] [1752071595.889474691] [DmArmHardware]: all motors disable successfully [ros2_control_node-3] [INFO] [1752071595.889542410] [resource_manager]: Successful 'deactivate' of hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071595.889551787] [resource_manager]: 'shutdown' hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071595.889557699] [resource_manager]: Successful 'shutdown' of hardware 'DmArmHardware' [ros2_control_node-3] [INFO] [1752071595.889590281] [controller_manager]: Shutting down the controller manager. [INFO] [ros2_control_node-3]: process has finished cleanly [pid 82567]``` code_text
• 机械臂力控板块

  机械臂力控板块 | 版主： @陆门马

  5
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  2

  400f79ff-8a2f-4584-b099-ffe7dbc31462.jpeg

  机械臂，遥操作+加力反馈，如何实现？

  遥操作：通过手柄，手机，或者任何形式的“遥控器”遥控机械臂的运动。最简单的形式就是以一个机械臂（主臂）遥控另一个机械臂（从臂）。

  力反馈：当从臂碰到障碍物时，主臂可以以力的形式感受到这个障碍物，所谓“感受”就是操作者感受到主臂的力。

  代码：https://gitee.com/qingqing-gaq/feel_force.git

  视频：https://www.bilibili.com/video/BV1KoEqzyEFR/?vd_source=36451ca805358187c4a0efa1c5694b35

  我的实现思路：
  软件：rso2
  硬件：双通道usb转can模块，六个达妙4310电机。

  六个电机，组成两个三自由度机械臂。一个can通道控制一个机械臂。

  大体逻辑：
  主臂时重力补偿模式，因为只有重力补偿才能任意拖动。主臂把实时的关节位置，发送给从臂，因此从臂必然是位置控制模式，这样才能跟踪主臂的位置。
  那么主臂如何感受从臂的力呢？这里就需要电机有力矩接口了（达妙电机的mit模式），当从臂电机受到阻力时，pid控制力就会变大，电机反馈会的力也会变大，这个变大的值就是阻力了。把这个力反馈给主臂即可。
  程序运行逻辑：
  23467808-ec76-44af-b4b5-f339ae8f85d4.png
  操作逻辑的代码：

  std::cout << "JointPositionControl::execute..............." << std::endl; //从对应的can接收线程中读取电机状态，并更新到机械臂类储存关节状态的变量（下面会用到）中 arm->update_current_joint_states();//一定要在get_current_joint_states()之前执行 arm2->update_current_joint_states();//一定要在get_current_joint_states()之前执行 //从机械臂类里返回储存关节状态的变量 const auto &curret_joint_states = arm->get_current_joint_states(); const auto &curret_joint_states2 = arm2->get_current_joint_states(); //根据当前的关节状态，计算逆动力学，进行重力补偿。 arm->computeInverseDynamics(arm->current_joint_positions, arm->current_joint_velocities, arm->current_joint_acceleration, arm->gravity_joint_tauqes); arm2->computeInverseDynamics(arm2->current_joint_positions, arm2->current_joint_velocities, arm2->current_joint_acceleration, arm2->gravity_joint_tauqes); std::vector<float> pos1(arm->getDof(), 0.0f); std::vector<float> pos2(arm->getDof(), 0.0f); std::vector<float> vel(arm->getDof(), 0.0f); std::vector<float> vel2(arm->getDof(), 0.0f); std::vector<float> tor(arm->getDof(), 0.0f); std::vector<float> tor2(arm2->getDof(), 0.0f); for (size_t i = 0; i < arm->getDof(); i++) { if(i==2) {//三号电机转向和模型相反，所以要单独加一个负号 tor[i] = -arm->gravity_joint_tauqes(i);//发送给主臂的重力补偿力矩 tor2[i] = -arm2->gravity_joint_tauqes(i);//发送给从臂的重力补偿力矩 } else { tor[i] = arm->gravity_joint_tauqes(i);//发送给主臂的重力补偿力矩 tor2[i] = arm2->gravity_joint_tauqes(i);//发送给主臂的重力补偿力矩 } //主臂的关节速度，发送给从臂 vel2[i] = 0.10 * curret_joint_states.at(i).velocity; // 系数越大手感越硬。 //主臂的关节位置，发送给从臂 pos2[i] = curret_joint_states.at(i).position; } float torque_threshold = 0.04f; // 设置阈值 //从臂受到的阻力，返回给主臂 for (size_t i = 0; i < arm->getDof(); i++) { if (std::abs(curret_joint_states2.at(i).torque) > torque_threshold) { tor[i] += -0.5 * (curret_joint_states2.at(i).torque - tor2[i]); // 如果超过阈值，按原逻辑计算 } else { tor[i] += 0.0f; // 否则赋值为 0 } } // pos2[0] = 0; tor2[0] = 0; arm->send_joint_states(pos1, vel, tor);//向主臂发送关节的状态 arm2->send_joint_states(pos2, vel2, tor2);//向从臂发送关节的状态

  其中：主臂位置发送给从臂的逻辑好理解。

  pos2[i] = curret_joint_states.at(i).position; //curret_joint_states.at(i).position：主臂的实时关节位置 //pos2[i]：发送给从臂的关节位置

  这一句是从臂的力矩反馈给主臂。有一步操作是从臂反馈的力矩减去了重力补偿力矩，这是因为，反馈的电机力矩是pid产生的。这个pid产生的控制力矩就包含重力力矩，如果把这个力也算上发送给主臂，那主臂就会变的很称，因为从臂把重力也传过来了。

  tor[i] += -0.5 * (curret_joint_states2.at(i).torque - tor2[i]); //tor[i]： 发送给主臂的关节力矩 //curret_joint_states2.at(i).torque：从臂电机反馈会来的力矩 //tor2[i]：发送给从臂的重力补偿力矩。 //-0.5：缩放系数

  这个if判断的作用是，避免从臂传来的力一直在小幅度波动，只有从臂反馈的力大于一个值，这个力才会被加载到主臂上。

  float torque_threshold = 0.04f; // 设置阈值 //从臂受到的阻力，返回给主臂 for (size_t i = 0; i < arm->getDof(); i++) { if (std::abs(curret_joint_states2.at(i).torque) > torque_threshold) { tor[i] += -0.5 * (curret_joint_states2.at(i).torque - tor2[i]); // 如果超过阈值，按原逻辑计算 } else { tor[i] += 0.0f; // 否则赋值为 0 } }

  这又是一个神奇的操作。就是让从臂有期望速度。作用就是会影响操作手感。

  vel2[i] = 0.10 * curret_joint_states.at(i).velocity; // 系数越大手感越硬。

  ok这就是整个的实现逻辑，非常简陋。

  程序框架简介：https://zwf9l1z0bm3.feishu.cn/docx/Ee3EdW8meoy79uxzBQVcXe11nfh?from=from_copylink
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  @2039235330 下面链接里面有https://github.com/micro-ROS/micro_ros_stm32cubemx_utils/tree/kilted/extra_sources