moveit2机械臂画方形
时间: 2025-03-26 21:34:38 浏览: 57
### 实现机械臂绘制方形轨迹
为了控制机械臂使用 MoveIt2 绘制方形轨迹,可以采用规划路径的方式。MoveIt 提供了丰富的 API 来定义和执行复杂的运动序列[^1]。
#### 创建 ROS 节点并初始化 MoveGroupInterface
首先,在 C++ 或 Python 中创建一个新的节点来管理机械臂的动作。这里提供一个基于 Python 的例子:
```python
import sys
import rospy
import moveit_commander
from geometry_msgs.msg import Pose, Point, Quaternion
import tf.transformations as tr
def plan_square_trajectory(group):
waypoints = []
scale = 0.1
wpose = group.get_current_pose().pose
wpose.position.z -= scale * 0.5
waypoints.append(copy.deepcopy(wpose))
# 定义四个角的位置
for i in range(4):
angle = (i + 1) * 90 / 180.0 * math.pi
quat = tr.quaternion_from_euler(0., 0., angle)
wpose.orientation.x = quat[0]
wpose.orientation.y = quat[1]
wpose.orientation.z = quat[2]
wpose.orientation.w = quat[3]
if i % 2 == 0:
wpose.position.x += scale
else:
wpose.position.y += scale
waypoints.append(copy.deepcopy(wpose))
(plan, fraction) = group.compute_cartesian_path(
waypoints,
eef_step=scale/2, # 设置步长
jump_threshold=0.0)
return plan, fraction
if __name__ == '__main__':
try:
moveit_commander.roscpp_initialize(sys.argv)
rospy.init_node('move_group_python_interface_tutorial', anonymous=True)
robot = moveit_commander.RobotCommander()
scene = moveit_commander.PlanningSceneInterface()
group_name = "manipulator"
move_group = moveit_commander.MoveGroupCommander(group_name)
display_trajectory_publisher = rospy.Publisher('/move_group/display_planned_path',
moveit_msgs.msg.DisplayTrajectory,
queue_size=20)
cartesian_plan, fraction = plan_square_trajectory(move_group)
move_group.execute(cartesian_plan, wait=True)
except Exception as err:
print(f"Error occurred: {err}")
```
这段代码通过 `compute_cartesian_path` 方法计算了一条由多个中间姿态组成的连续路径,并最终调用 `execute()` 执行这条路径。此过程中利用了四元数表示末端执行器的姿态变化。
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