基于SLAM系统建图仿真,完成定位仿真
基于SLAM系统完成建图仿真,详见之前的博客
参考链接
Part 1: 准备工作
navigation安装
sudo apt install ros-melodic-navigation
Part 2: 编写 amcl 相关 launch文件
查看并复制 amcl 模版
roscd amcl
gedit examples/amcl_diff.launch
mycar_ws/src/nav_demo/launch/nav04_amcl.launch
<launch>
<node pkg="amcl" type="amcl" name="amcl" output="screen">
<!-- Publish scans from best pose at a max of 10 Hz -->
<param name="odom_model_type" value="diff"/>
<param name="odom_alpha5" value="0.1"/>
<param name="transform_tolerance" value="0.2" />
<param name="gui_publish_rate" value="10.0"/>
<param name="laser_max_beams" value="30"/>
<param name="min_particles" value="500"/>
<param name="max_particles" value="5000"/>
<param name="kld_err" value="0.05"/>
<param name="kld_z" value="0.99"/>
<param name="odom_alpha1" value="0.2"/>
<param name="odom_alpha2" value="0.2"/>
<!-- translation std dev, m -->
<param name="odom_alpha3" value="0.8"/>
<param name="odom_alpha4" value="0.2"/>
<param name="laser_z_hit" value="0.5"/>
<param name="laser_z_short" value="0.05"/>
<param name="laser_z_max" value="0.05"/>
<param name="laser_z_rand" value="0.5"/>
<param name="laser_sigma_hit" value="0.2"/>
<param name="laser_lambda_short" value="0.1"/>
<param name="laser_lambda_short" value="0.1"/>
<param name="laser_model_type" value="likelihood_field"/>
<!-- <param name="laser_model_type" value="beam"/> -->
<param name="laser_likelihood_max_dist" value="2.0"/>
<param name="update_min_d" value="0.2"/>
<param name="update_min_a" value="0.5"/>
<!-- set coordinate system: odom、map、base_link -->
<param name="odom_frame_id" value="odom"/>
<param name="base_frame_id" value="base_footprint"/>
<param name="resample_interval" value="1"/>
<param name="transform_tolerance" value="0.1"/>
<param name="recovery_alpha_slow" value="0.0"/>
<param name="recovery_alpha_fast" value="0.0"/>
</node>
</launch>
编写 amcl 测试 launch文件
mycar_ws/src/nav_demo/launch/test_amcl.launch
<!-- 测试文件 -->
<launch>
<!-- 启动 rviz -->
<node pkg="joint_state_publisher" name="joint_state_publisher" type="joint_state_publisher" />
<node pkg="robot_state_publisher" name="robot_state_publisher" type="robot_state_publisher" />
<node pkg="rviz" type="rviz" name="rviz"/>
<!-- 加载地图服务 -->
<include file="$(find nav_demo)/launch/nav03_map_server.launch" />
<!-- 启动 amcl 节点 -->
<include file="$(find nav_demo)/launch/nav04_amcl.launch" />
</launch>
Part 3: 执行 amcl
启动 gazebo 仿真环境
source ./devel/setup.bash
roslaunch mycar environment.launch
启动 amcl 测试 launch文件
source ./devel/setup.bash
roslaunch nav_demo test_amcl.launch
启动键盘控制节点
rosrun teleop_twist_keyboard teleop_twist_keyboard.py _speed:=0.3 _turn:=0.5
配置 rviz
RobotModel(加载机器人模型)
Map(显示SLAM构建的地图)
PoseArray(显示定位结果)
Part 4: 控制机器人运动,观察定位现象
调整至以下三个窗口均能观察到的布局,便于观看现象
通过键盘即可操控机器人运动