ros noetic中将URDF转换成DH的python函数
时间: 2023-09-28 22:06:07 浏览: 259
在ROS Noetic中,可以使用Python编写脚本来将URDF转换为DH参数。下面是一个示例函数,它使用`urdf_parser_py`和`pybullet`库来实现转换:
```python
import rospy
import urdf_parser_py.urdf as urdf
import pybullet as pb
def urdf_to_dh(urdf_file):
# 加载URDF文件
model = urdf.URDF.from_xml_file(urdf_file)
# 创建Pybullet物理引擎
physics_client = pb.connect(pb.DIRECT)
# 创建机器人模型
pb.loadURDF(urdf_file, flags=pb.URDF_USE_SELF_COLLISION)
# 获取机器人关节信息
joint_info = pb.getJointInfo(physics_client, 0)
num_joints = len(joint_info)
dh_parameters = []
for i in range(num_joints):
joint_info = pb.getJointInfo(physics_client, i)
joint_name = joint_info[1].decode("utf-8")
joint_type = joint_info[2]
if joint_type == pb.JOINT_REVOLUTE:
joint_axis = joint_info[13]
joint_axis = [axis for axis in joint_axis if axis != 0]
if len(joint_axis) == 3:
joint_axis = [1, 0, 0] # 默认为x轴
joint_origin = model.joints[joint_name].origin
joint_origin_xyz = [joint_origin.x, joint_origin.y, joint_origin.z]
joint_transform = pb.getLinkState(physics_client, i)[0]
joint_transform_xyz = joint_transform[:3]
dh_parameters.append([joint_name, joint_axis, joint_origin_xyz, joint_transform_xyz])
pb.disconnect(physics_client)
return dh_parameters
```
你可以将上述代码保存为一个Python脚本,在你的ROS Noetic环境中运行它。该函数将返回一个包含DH参数的列表,每个元素表示一个关节的DH参数。
请注意,这只是一个简单的示例函数,你可能需要根据你的具体需求进行修改和调整。另外,确保已经安装了`urdf_parser_py`和`pybullet`库,可以使用以下命令进行安装:
```
sudo apt-get install python3-rosdep
sudo rosdep init
rosdep update
pip install pybullet urdf-parser-py
```
希望对你有所帮助!
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