ROS ：发送一个目标位置，机器人自动规划路线，移动到该位置。_ros如何指定一个点,每次导航时可以自动移动到该点

使用 Action ：move_base_msgs::MoveBaseAction（move_base在world中的目标）

新建send_goal.cpp

/*
 * send_goal.cpp
 *
 *  Created on: Aug 10, 2016
 *      Author: unicorn
 */

#include <ros/ros.h>
#include <move_base_msgs/MoveBaseAction.h>
#include <actionlib/client/simple_action_client.h>
/*move_base_msgs::MoveBaseAction
 move_base在world中的目标
*/ 
typedef actionlib::SimpleActionClient<move_base_msgs::MoveBaseAction>  MoveBaseClient;
int main(int argc, char** argv) {
ros::init(argc, argv, "send_goals_node");

/*
// create the action client
// true causes the client to spin its own thread
//don't need ros::spin()
创建action客户端，参数1：action名，参数2：true，不需要手动调用ros::spin()，会在它的线程中自动调用。
*/
MoveBaseClient ac("move_base", true);
// Wait 60 seconds for the action server to become available
ROS_INFO("Waiting for the move_base action server");
ac.waitForServer(ros::Duration(60));
ROS_INFO("Connected to move base server");
// Send a goal to move_base
//目标的属性设置
move_base_msgs::MoveBaseGoal goal;
goal.target_pose.header.frame_id = "map";
goal.target_pose.header.stamp = ros::Time::now();
goal.target_pose.pose.position.x = 21.174;
goal.target_pose.pose.position.y = 10.876;
goal.target_pose.pose.orientation.w = 1;
ROS_INFO("");
ROS_INFO("Sending goal");
ac.sendGoal(goal);
// Wait for the action to return
ac.waitForResult();
if (ac.getState() == actionlib::SimpleClientGoalState::SUCCEEDED)
ROS_INFO("You have reached the goal!");
else
ROS_INFO("The base failed for some reason");
return 0;
}
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CMakeList.txt

add_executable(send_goal src/send_goal.cpp)
target_link_libraries(send_goal
   ${catkin_LIBRARIES}
 )
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新建launch文件goal_launch.launch

<launch>
  <master auto="start"/>
  <param name="/use_sim_time" value="true"/>
  <include file="$(find navigation_stage)/move_base_config/move_base.xml"/>

  <node pkg="stage_ros" type="stageros" name="stageros" args="$(find navigation_stage)/stage_config/worlds/willow-pr2-2.5cm.world" respawn="false" >
    <param name="base_watchdog_timeout" value="0.2"/>
  </node>
  <include file="$(find navigation_stage)/move_base_config/amcl_node.xml"/>  
  <node name="rviz" pkg="rviz" type="rviz" args="-d $(find navigation_stage)/single_robot.rviz" />
  <node name="send_goal" pkg="navigation_example" type="send_goal" output="screen"/>
</launch>
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launch 中的节点

<node name="map_server" pkg="map_server" type="map_server" args="$(find navigation_stage)/stage_config/maps/" respawn="false" />
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使用willow-full-0.025.pgm 0.025，注意要换成自己的文件目录，我的是在navigation_stage/stage_config/maps/文件中。
其他节点类似。

运行launch。

结果：