self.pub_path = rospy.Publisher("/topic_msgs_path", Path, queue_size=10) self.msg_path = Path() self.pub_expect_path = rospy.Publisher("/topic_expect_path", Path, queue_size=10) self.twist_msg = Twist() self.pub_orient = rospy.Publisher("/topic_orient", Odometry, queue_size=1) self.pub_cmd_vel = rospy.Publisher("cmd_vel",Twist,queue_size=1) self.static_transformStamped = geometry_msgs.msg.TransformStamped() self.setup_transform() # msgDetect(pub,msg,e,n,psi,psi_d,tau_d,force_d,vel_u,vel_u_d,T_l,T_r) self.t_range = P.t_range self.n_points = P.n_points # self.generate_path()
时间: 2024-04-20 22:23:21 浏览: 184
这段代码是一个类的初始化函数,在ROS中使用rospy库创建了多个发布者对象。这些发布者对象用于将不同类型的消息发布到相应的话题上。
首先,创建了一个名为"/topic_msgs_path"的话题发布者,消息类型为Path,队列大小为10,并将其赋值给self.pub_path。
接下来,创建了一个Path类型的消息对象self.msg_path。
然后,创建了另一个名为"/topic_expect_path"的话题发布者,消息类型为Path,队列大小为10,并将其赋值给self.pub_expect_path。
接着,创建了一个Twist类型的消息对象self.twist_msg。
然后,创建了一个名为"/topic_orient"的话题发布者,消息类型为Odometry,队列大小为1,并将其赋值给self.pub_orient。
最后,创建了一个名为"cmd_vel"的话题发布者,消息类型为Twist,队列大小为1,并将其赋值给self.pub_cmd_vel。
在类的其他代码中,还包括了一些其他功能,如设置静态变换、生成路径等。
相关问题
import roslib import rospy from geometry_msgs.msg import PoseWithCovarianceStamped from nav_msgs.msg import Odometry class OdomTRANS(): def __init__(self): rospy.init_node('odom_trans', anonymous=False) # 定义发布器nav_msgs/Odometry self.odom_pub = rospy.Publisher('output', Odometry,queue_size=10) # 等待/odom_combined消息 rospy.wait_for_message('input', PoseWithCovarianceStamped) # 订阅/odom_combined话题 rospy.Subscriber('input', PoseWithCovarianceStamped, self.do_Msg) rospy.loginfo("Publishing combined odometry on /odom_trans") def do_Msg(self, msg): odom = Odometry() odom.header = msg.header odom.child_frame_id = 'base_footprint' odom.pose = msg.pose self.odom_pub.publish(odom) if __name__ == '__main__': try: OdomTRANS() rospy.spin() except: pass
这段代码使用ROS(机器人操作系统)中的Python库,实现将一个消息类型为PoseWithCovarianceStamped的话题(/input)转换为消息类型为Odometry的话题(/output)的功能。具体来说,它订阅了/input话题,当有消息发布到该话题时,会调用do_Msg函数将PoseWithCovarianceStamped类型的消息转换为Odometry类型的消息,并发布到/output话题上。这段代码的作用是将机器人的位姿信息从一个消息类型转换为另一个消息类型,方便其他节点使用。
更正这个Python代码import rospy from mavros_msgs.msg import State from mavros_msgs.srv import CommandBool, SetMode from geometry_msgs.msg import PoseStamped import time current_state = State() def state_cb(msg): global current_state current_state = msg rospy.init_node('position') rate = rospy.Rate(20.0) state_sub = rospy.Subscriber("mavros/state", State, state_cb) local_pos_pub = rospy.Publisher("mavros/setpoint_position/local", PoseStamped, queue_size=10) arming_client = rospy.ServiceProxy("mavros/cmd/arming", CommandBool) set_mode_client = rospy.ServiceProxy("mavros/set_mode", SetMode) wait for FCU connection while not rospy.is_shutdown() and not current_state.connected: rate.sleep() pose = PoseStamped() pose.pose.position.x = 0 pose.pose.position.y = 0 pose.pose.position.z = 1.5 offb_set_mode = SetMode() offb_set_mode.custom_mode = "OFFBOARD" arm_cmd = CommandBool() arm_cmd.value = True state = 3 last_request = rospy.Time.now() while not rospy.is_shutdown() and (rospy.Time.now() - last_request < rospy.Duration(5.0)): if not current_state.armed: if arming_client(arm_cmd) and arm_cmd.response.success: rospy.loginfo("Vehicle armed") if current_state.mode != "OFFBOARD": if set_mode_client(offb_set_mode) and offb_set_mode.response.mode_sent: rospy.loginfo("Offboard enabled") rate.sleep() while state > 0: last_request = rospy.Time.now() while not rospy.is_shutdown() and (rospy.Time.now() - last_request < rospy.Duration(5.0)): pose.pose.position.x = 0 pose.pose.position.y = 0 local_pos_pub.publish(pose) rospy.loginfo("SUCCESS0") rate.sleep() last_request = rospy.Time.now() while not rospy.is_shutdown() and (rospy.Time.now() - last_request < rospy.Duration(5.0)): pose.pose.position.x = 2 pose.pose.position.y = 2 local_pos_pub.publish(pose) rospy.loginfo("SUCCESS1") rate.sleep() state -= 1 rospy.loginfo("state=" + str(state)) offb_set_mode.custom_mode = "AUTO.LAND" if set_mode_client(offb_set_mode) and offb_set_mode.response.mode_sent: rospy.loginfo("AUTO.LAND enabled") last_request = rospy.Time.now() rospy.spin()
这段 Python 代码主要是控制飞行器执行一定的动作。代码中,首先通过导入 rospy、mavros_msgs.msg、mavros_msgs.srv、geometry_msgs.msg 等模块,定义了一些变量和函数。
然后,在 while 循环中,程序会等待与飞控系统的连接建立,之后会设置飞行器的起飞高度为 1.5 米,然后进入一个 while 循环,其中会执行飞行器的上升和向右移动,最后执行自动降落的任务。
其中,offb_set_mode.custom_mode = "OFFBOARD" 会将飞行器的模式设置为 OFFBOARD,arm_cmd.value = True 会将飞行器的电机解锁,local_pos_pub.publish(pose) 会将飞行器的位置信息发布到话题中,set_mode_client(offb_set_mode) 会将飞行器的模式切换为指定的模式,arming_client(arm_cmd) 会将飞行器的电机锁定或解锁。
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