Question

I was wondering if there is a .launch file that allows to run the different planner algorithms (e.g. APF, A*, Dijkstra's....) ? Or perhaps if there might be a file in the base_move package to perform that automatically?

I am performing my simulation in Gazebo/RViz platform using the turtlebot3/navigation packages and would like to use different algorithms for path planning and compare their performance. I would like to only have to run one launch file several times instead of re-configuring multiple other files to adjust to each different algorithm since I will be running many simulations with several path planning algorithms.

I am using ROS kinetic & Ubuntu 16.04.

Thank you in advance.

Asked by jesus on 2019-02-25 13:10:05 UTC

Answer 1

If you are using the default "global_planner/GlobalPlanner" plugin, you have the option to toggle between 2 different types of global planners, A* and Dijkstra's. If you are not already using the GlobalPlanner plugin, you can do so by first going over to "turtlebot3_navigation/launch/move_base.launch" and adding the following line to your move_base node as follows:

<node pkg="move_base" type="move_base" respawn="false" name="move_base" output="screen">
   <param name="base_local_planner" value="dwa_local_planner/DWAPlannerROS" />
   <param name="base_global_planner" value="global_planner/GlobalPlanner"/>
   <rosparam file="$(find turtlebot3_navigation)/param/global_planner.yaml" command="load" ns="GlobalPlanner"/>
   ...

You can then toggle between A* and Dijkstra's in your global_planner.yaml file. Please create this param file according to the global_planner documentation. An example is provided below:

allow_unknown: true 
default_tolerance: 0.0 
visualize_potential: false 
use_dijkstra: true
use_quadratic: true 
use_grid_path: false 
old_navfn_behavior: false 
lethal_cost: 253 
neutral_cost: 50
cost_factor: 1.0
publish_potential: True
orientation_mode: 1 
orientation_window_size: 1 
outline_map: true

If you would like to try out alternative global planners aside from the defaults, you can check out sbpl_lattice_planner from the navigation_experimental repo.

Alternatively, if you need to write your own global planner plugin to suit your needs, you can refer to Writing A Global Path Planner As Plugin in ROS

Asked by JohnTGZ on 2021-10-02 11:14:07 UTC

Global Planner With Different Planner Algorithms

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