ROS使用gmapping以及hector进行slam建图

1>启动已有的机器人仿真环境。

roslaunch mbot_gazebo view_mbot_with_laser_gazebo_suyunzzz_world.launch

该launch文件如下

<launch>

    <!-- 设置launch文件的参数 -->
    <arg name="world_name" value="$(find mbot_gazebo)/worlds/suyunzzz_world.world"/>
    <arg name="paused" default="false"/>
    <arg name="use_sim_time" default="true"/>
    <arg name="gui" default="true"/>
    <arg name="headless" default="false"/>
    <arg name="debug" default="false"/>

    <!-- 运行gazebo仿真环境 -->
    <include file="$(find gazebo_ros)/launch/empty_world.launch">
        <arg name="world_name" value="$(arg world_name)" />
        <arg name="debug" value="$(arg debug)" />
        <arg name="gui" value="$(arg gui)" />
        <arg name="paused" value="$(arg paused)"/>
        <arg name="use_sim_time" value="$(arg use_sim_time)"/>
        <arg name="headless" value="$(arg headless)"/>
    </include>

    <!-- 加载机器人模型描述参数 -->
    <param name="robot_description" command="$(find xacro)/xacro --inorder '$(find mbot_description2)/urdf/xacro/gazebo/mbot_with_laser_gazebo.xacro'" /> 

    <!-- 运行joint_state_publisher节点，发布机器人的关节状态  -->
    <node name="joint_state_publisher" pkg="joint_state_publisher" type="joint_state_publisher" ></node> 

    <!-- 运行robot_state_publisher节点，发布tf  -->
    <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher"  output="screen" >
        <param name="publish_frequency" type="double" value="50.0" />
    </node>

    <!-- 在gazebo中加载机器人模型-->
    <node name="urdf_spawner" pkg="gazebo_ros" type="spawn_model" respawn="false" output="screen"
          args="-urdf -model mrobot -param robot_description"/> 

</launch>

相对于机器人建模的那个文件更换了一个地图，该地图是自己绘制保存下来的。

2>启动建图节点(gmapping、hector)以及rviz

roslaunch wheel_chair_navigation gmapping_demo.launch
(roslaunch wheel_chair_navigation hector_demo.launch)

以gmapping为例，launch文件如下所示

<launch>

    <include file="$(find wheel_chair_navigation)/launch/gmapping.launch"/>

    <!-- 启动rviz -->
    <node pkg="rviz" type="rviz" name="rviz" args="-d $(find wheel_chair_navigation)/rviz/gmapping.rviz"/>

</launch>

其中，gmappiing.launch如下：

<launch>
    <arg name="scan_topic" default="scan" />

    <node pkg="gmapping" type="slam_gmapping" name="slam_gmapping" output="screen" clear_params="true">
        <param name="odom_frame" value="odom"/>
        <param name="map_update_interval" value="5.0"/>
        <!-- Set maxUrange < actual maximum range of the Laser -->
        <param name="maxRange" value="5.0"/>
        <param name="maxUrange" value="4.5"/>
        <param name="sigma" value="0.05"/>
        <param name="kernelSize" value="1"/>
        <param name="lstep" value="0.05"/>
        <param name="astep" value="0.05"/>
        <param name="iterations" value="5"/>
        <param name="lsigma" value="0.075"/>
        <param name="ogain" value="3.0"/>
        <param name="lskip" value="0"/>
        <param name="srr" value="0.01"/>
        <param name="srt" value="0.02"/>
        <param name="str" value="0.01"/>
        <param name="stt" value="0.02"/>
        <param name="linearUpdate" value="0.5"/>
        <param name="angularUpdate" value="0.436"/>
        <param name="temporalUpdate" value="-1.0"/>
        <param name="resampleThreshold" value="0.5"/>
        <param name="particles" value="80"/>
        <param name="xmin" value="-1.0"/>
        <param name="ymin" value="-1.0"/>
        <param name="xmax" value="1.0"/>
        <param name="ymax" value="1.0"/>
        <param name="delta" value="0.05"/>
        <param name="llsamplerange" value="0.01"/>
        <param name="llsamplestep" value="0.01"/>
        <param name="lasamplerange" value="0.005"/>
        <param name="lasamplestep" value="0.005"/>
        <remap from="scan" to="$(arg scan_topic)"/>
    </node>
</launch>

gmapping.rviz配置如下：

Panels:
  - Class: rviz/Displays
    Help Height: 78
    Name: Displays
    Property Tree Widget:
      Expanded:
        - /Global Options1
        - /RobotModel1/Links1/base_footprint1
        - /Map1/Position1
      Splitter Ratio: 0.652661026
    Tree Height: 661
  - Class: rviz/Selection
    Name: Selection
  - Class: rviz/Tool Properties
    Expanded:
      - /2D Pose Estimate1
      - /2D Nav Goal1
    Name: Tool Properties
    Splitter Ratio: 0.428570986
  - Class: rviz/Views
    Expanded:
      - /Current View1
    Name: Views
    Splitter Ratio: 0.5
  - Class: rviz/Time
    Experimental: false
    Name: Time
    SyncMode: 0
    SyncSource: LaserScan
Visualization Manager:
  Class: ""
  Displays:
    - Alpha: 0.5
      Cell Size: 0.5
      Class: rviz/Grid
      Color: 88; 88; 90
      Enabled: true
      Line Style:
        Line Width: 0.0299999993
        Value: Lines
      Name: Grid
      Normal Cell Count: 0
      Offset:
        X: 0
        Y: 0
        Z: 0
      Plane: XY
      Plane Cell Count: 80
      Reference Frame: map
      Value: true
    - Angle Tolerance: 0.100000001
      Class: rviz/Odometry
      Covariance:
        Orientation:
          Alpha: 0.5
          Color: 255; 255; 127
          Color Style: Unique
          Frame: Local
          Offset: 1
          Scale: 1
          Value: true
        Position:
          Alpha: 0.300000012
          Color: 204; 51; 204
          Scale: 1
          Value: true
        Value: true
      Enabled: false
      Keep: 100
      Name: Odometry
      Position Tolerance: 0.100000001
      Shape:
        Alpha: 1
        Axes Length: 1
        Axes Radius: 0.100000001
        Color: 255; 25; 0
        Head Length: 0.300000012
        Head Radius: 0.100000001
        Shaft Length: 1
        Shaft Radius: 0.0500000007
        Value: Arrow
      Topic: /odom
      Unreliable: false
      Value: false
    - Angle Tolerance: 0.100000001
      Class: rviz/Odometry
      Covariance:
        Orientation:
          Alpha: 0.5
          Color: 255; 255; 127
          Color Style: Unique
          Frame: Local
          Offset: 1
          Scale: 1
          Value: true
        Position:
          Alpha: 0.300000012
          Color: 204; 51; 204
          Scale: 1
          Value: true
        Value: true
      Enabled: false
      Keep: 100
      Name: Odometry EKF
      Position Tolerance: 0.100000001
      Shape:
        Alpha: 1
        Axes Length: 1
        Axes Radius: 0.100000001
        Color: 255; 25; 0
        Head Length: 0.300000012
        Head Radius: 0.100000001
        Shaft Length: 1
        Shaft Radius: 0.0500000007
        Value: Arrow
      Topic: /odom
      Unreliable: false
      Value: false
    - Alpha: 1
      Class: rviz/RobotModel
      Collision Enabled: false
      Enabled: true
      Links:
        All Links Enabled: true
        Expand Joint Details: false
        Expand Link Details: false
        Expand Tree: false
        Link Tree Style: Links in Alphabetic Order
        back_caster_link:
          Alpha: 1
          Show Axes: false
          Show Trail: false
          Value: true
        base_footprint:
          Alpha: 1
          Show Axes: false
          Show Trail: false
          Value: true
        base_link:
          Alpha: 1
          Show Axes: false
          Show Trail: false
          Value: true
        front_caster_link:
          Alpha: 1
          Show Axes: false
          Show Trail: false
          Value: true
        kinect_frame_optical:
          Alpha: 1
          Show Axes: false
          Show Trail: false
        kinect_link:
          Alpha: 1
          Show Axes: false
          Show Trail: false
          Value: true
        left_wheel_link:
          Alpha: 1
          Show Axes: false
          Show Trail: false
          Value: true
        right_wheel_link:
          Alpha: 1
          Show Axes: false
          Show Trail: false
          Value: true
      Name: RobotModel
      Robot Description: robot_description
      TF Prefix: ""
      Update Interval: 0
      Value: true
      Visual Enabled: true
    - Alpha: 0.5
      Class: rviz/Map
      Color Scheme: map
      Draw Behind: true
      Enabled: true
      Name: Map
      Topic: /map
      Unreliable: false
      Use Timestamp: false
      Value: true
    - Alpha: 1
      Autocompute Intensity Bounds: true
      Autocompute Value Bounds:
        Max Value: 0.30399999
        Min Value: 0.30399999
        Value: true
      Axis: Z
      Channel Name: intensity
      Class: rviz/LaserScan
      Color: 255; 0; 0
      Color Transformer: FlatColor
      Decay Time: 0
      Enabled: true
      Invert Rainbow: false
      Max Color: 255; 255; 255
      Max Intensity: 4096
      Min Color: 0; 0; 0
      Min Intensity: 0
      Name: LaserScan
      Position Transformer: XYZ
      Queue Size: 10
      Selectable: true
      Size (Pixels): 3
      Size (m): 0.100000001
      Style: Spheres
      Topic: /scan
      Unreliable: false
      Use Fixed Frame: true
      Use rainbow: true
      Value: true
  Enabled: true
  Global Options:
    Background Color: 0; 0; 0
    Default Light: true
    Fixed Frame: map
    Frame Rate: 30
  Name: root
  Tools:
    - Class: rviz/MoveCamera
    - Class: rviz/Interact
      Hide Inactive Objects: true
    - Class: rviz/Select
    - Class: rviz/SetInitialPose
      Topic: /initialpose
    - Class: rviz/SetGoal
      Topic: /move_base_simple/goal
  Value: true
  Views:
    Current:
      Class: rviz/XYOrbit
      Distance: 17.4334984
      Enable Stereo Rendering:
        Stereo Eye Separation: 0.0599999987
        Stereo Focal Distance: 1
        Swap Stereo Eyes: false
        Value: false
      Focal Point:
        X: 0.491072416
        Y: -4.53872395
        Z: 4.76837158e-07
      Focal Shape Fixed Size: true
      Focal Shape Size: 0.0500000007
      Invert Z Axis: false
      Name: Current View
      Near Clip Distance: 0.00999999978
      Pitch: 1.47479641
      Target Frame: <Fixed Frame>
      Value: XYOrbit (rviz)
      Yaw: 4.70039797
    Saved: ~
Window Geometry:
  Displays:
    collapsed: false
  Height: 874
  Hide Left Dock: false
  Hide Right Dock: false
  QMainWindow State: 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
  Selection:
    collapsed: false
  Time:
    collapsed: false
  Tool Properties:
    collapsed: false
  Views:
    collapsed: false
  Width: 1358
  X: 2435
  Y: 113

3>启动键盘控制节点

rosrun mbot_teleop mbot_teleop.py

该脚本文件如下：

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import rospy
from geometry_msgs.msg import Twist
import sys, select, termios, tty

msg = """
Control mbot!
---------------------------
Moving around:
   u    i    o
   j    k    l
   m    ,    .

q/z : increase/decrease max speeds by 10%
w/x : increase/decrease only linear speed by 10%
e/c : increase/decrease only angular speed by 10%
space key, k : force stop
anything else : stop smoothly

CTRL-C to quit
"""

moveBindings = {
        'i':(1,0),
        'o':(1,-1),
        'j':(0,1),
        'l':(0,-1),
        'u':(1,1),
        ',':(-1,0),
        '.':(-1,1),
        'm':(-1,-1),
           }

speedBindings={
        'q':(1.1,1.1),
        'z':(.9,.9),
        'w':(1.1,1),
        'x':(.9,1),
        'e':(1,1.1),
        'c':(1,.9),
          }

def getKey():
    tty.setraw(sys.stdin.fileno())
    rlist, _, _ = select.select([sys.stdin], [], [], 0.1)
    if rlist:
        key = sys.stdin.read(1)
    else:
        key = ''

    termios.tcsetattr(sys.stdin, termios.TCSADRAIN, settings)
    return key

speed = .2
turn = 1

def vels(speed,turn):
    return "currently:\tspeed %s\tturn %s " % (speed,turn)

if __name__=="__main__":
    settings = termios.tcgetattr(sys.stdin)
    
    rospy.init_node('mbot_teleop')
    pub = rospy.Publisher('/cmd_vel', Twist, queue_size=5)

    x = 0
    th = 0
    status = 0
    count = 0
    acc = 0.1
    target_speed = 0
    target_turn = 0
    control_speed = 0
    control_turn = 0
    try:
        print msg
        print vels(speed,turn)
        while(1):
            key = getKey()
            # 运动控制方向键（1：正方向，-1负方向）
            if key in moveBindings.keys():
                x = moveBindings[key][0]
                th = moveBindings[key][1]
                count = 0
            # 速度修改键
            elif key in speedBindings.keys():
                speed = speed * speedBindings[key][0]  # 线速度增加0.1倍
                turn = turn * speedBindings[key][1]    # 角速度增加0.1倍
                count = 0

                print vels(speed,turn)
                if (status == 14):
                    print msg
                status = (status + 1) % 15
            # 停止键
            elif key == ' ' or key == 'k' :
                x = 0
                th = 0
                control_speed = 0
                control_turn = 0
            else:
                count = count + 1
                if count > 4:
                    x = 0
                    th = 0
                if (key == '\x03'):
                    break

            # 目标速度=速度值*方向值
            target_speed = speed * x
            target_turn = turn * th

            # 速度限位，防止速度增减过快
            if target_speed > control_speed:
                control_speed = min( target_speed, control_speed + 0.02 )
            elif target_speed < control_speed:
                control_speed = max( target_speed, control_speed - 0.02 )
            else:
                control_speed = target_speed

            if target_turn > control_turn:
                control_turn = min( target_turn, control_turn + 0.1 )
            elif target_turn < control_turn:
                control_turn = max( target_turn, control_turn - 0.1 )
            else:
                control_turn = target_turn

            # 创建并发布twist消息
            twist = Twist()
            twist.linear.x = control_speed; 
            twist.linear.y = 0; 
            twist.linear.z = 0
            twist.angular.x = 0; 
            twist.angular.y = 0; 
            twist.angular.z = control_turn
            pub.publish(twist)

    except:
        print e

    finally:
        twist = Twist()
        twist.linear.x = 0; twist.linear.y = 0; twist.linear.z = 0
        twist.angular.x = 0; twist.angular.y = 0; twist.angular.z = 0
        pub.publish(twist)

    termios.tcsetattr(sys.stdin, termios.TCSADRAIN, settings)

建图完成之后在想要保存地图的目录下使用

rosrun map_server map_saver -f <filename>

即可保存地图。