a

config/nav2_params.yaml

+amcl:
+  ros__parameters:
+    use_sim_time: True
+    alpha1: 0.2
+    alpha2: 0.2
+    alpha3: 0.2
+    alpha4: 0.2
+    alpha5: 0.2
+    base_frame_id: "base_footprint"
+    beam_skip_distance: 0.5
+    beam_skip_error_threshold: 0.9
+    beam_skip_threshold: 0.3
+    do_beamskip: false
+    global_frame_id: "map"
+    lambda_short: 0.1
+    laser_likelihood_max_dist: 2.0
+    laser_max_range: 100.0
+    laser_min_range: -1.0
+    laser_model_type: "likelihood_field"
+    max_beams: 60
+    max_particles: 2000
+    min_particles: 500
+    odom_frame_id: "odom"
+    pf_err: 0.05
+    pf_z: 0.99
+    recovery_alpha_fast: 0.0
+    recovery_alpha_slow: 0.0
+    resample_interval: 1
+    robot_model_type: "Differential"
+    save_pose_rate: 0.5
+    sigma_hit: 0.2
+    tf_broadcast: true
+    transform_tolerance: 1.0
+    update_min_a: 0.2
+    update_min_d: 0.25
+    z_hit: 0.5
+    z_max: 0.05
+    z_rand: 0.5
+    z_short: 0.05
+    scan_topic: scan
+
+amcl_map_client:
+  ros__parameters:
+    use_sim_time: True
+
+amcl_rclcpp_node:
+  ros__parameters:
+    use_sim_time: True
+
+bt_navigator:
+  ros__parameters:
+    use_sim_time: True
+    global_frame: map
+    robot_base_frame: base_link
+    odom_topic: /odom
+    enable_groot_monitoring: True
+    groot_zmq_publisher_port: 1666
+    groot_zmq_server_port: 1667
+    default_bt_xml_filename: "navigate_w_replanning_and_recovery.xml"
+    plugin_lib_names:
+    - nav2_compute_path_to_pose_action_bt_node
+    - nav2_follow_path_action_bt_node
+    - nav2_back_up_action_bt_node
+    - nav2_spin_action_bt_node
+    - nav2_wait_action_bt_node
+    - nav2_clear_costmap_service_bt_node
+    - nav2_is_stuck_condition_bt_node
+    - nav2_goal_reached_condition_bt_node
+    - nav2_goal_updated_condition_bt_node
+    - nav2_initial_pose_received_condition_bt_node
+    - nav2_reinitialize_global_localization_service_bt_node
+    - nav2_rate_controller_bt_node
+    - nav2_distance_controller_bt_node
+    - nav2_speed_controller_bt_node
+    - nav2_truncate_path_action_bt_node
+    - nav2_goal_updater_node_bt_node
+    - nav2_recovery_node_bt_node
+    - nav2_pipeline_sequence_bt_node
+    - nav2_round_robin_node_bt_node
+    - nav2_transform_available_condition_bt_node
+    - nav2_time_expired_condition_bt_node
+    - nav2_distance_traveled_condition_bt_node
+
+bt_navigator_rclcpp_node:
+  ros__parameters:
+    use_sim_time: True
+
+controller_server:
+  ros__parameters:
+    use_sim_time: True
+    controller_frequency: 20.0
+    min_x_velocity_threshold: 0.001
+    min_y_velocity_threshold: 0.5
+    min_theta_velocity_threshold: 0.001
+    progress_checker_plugin: "progress_checker"
+    goal_checker_plugin: "goal_checker"
+    controller_plugins: ["FollowPath"]
+
+    # Progress checker parameters
+    progress_checker:
+      plugin: "nav2_controller::SimpleProgressChecker"
+      required_movement_radius: 0.5
+      movement_time_allowance: 10.0
+    # Goal checker parameters
+    goal_checker:
+      plugin: "nav2_controller::SimpleGoalChecker"
+      xy_goal_tolerance: 0.25
+      yaw_goal_tolerance: 0.25
+      stateful: True
+    # DWB parameters
+    FollowPath:
+      plugin: "dwb_core::DWBLocalPlanner"
+      debug_trajectory_details: True
+      min_vel_x: 0.0
+      min_vel_y: 0.0
+      max_vel_x: 0.26
+      max_vel_y: 0.0
+      max_vel_theta: 1.0
+      min_speed_xy: 0.0
+      max_speed_xy: 0.26
+      min_speed_theta: 0.0
+      # Add high threshold velocity for turtlebot 3 issue.
+      # https://github.com/ROBOTIS-GIT/turtlebot3_simulations/issues/75
+      acc_lim_x: 2.5
+      acc_lim_y: 0.0
+      acc_lim_theta: 3.2
+      decel_lim_x: -2.5
+      decel_lim_y: 0.0
+      decel_lim_theta: -3.2
+      vx_samples: 20
+      vy_samples: 5
+      vtheta_samples: 20
+      sim_time: 1.7
+      linear_granularity: 0.05
+      angular_granularity: 0.025
+      transform_tolerance: 0.2
+      xy_goal_tolerance: 0.25
+      trans_stopped_velocity: 0.25
+      short_circuit_trajectory_evaluation: True
+      stateful: True
+      critics: ["RotateToGoal", "Oscillation", "BaseObstacle", "GoalAlign", "PathAlign", "PathDist", "GoalDist"]
+      BaseObstacle.scale: 0.02
+      PathAlign.scale: 32.0
+      PathAlign.forward_point_distance: 0.1
+      GoalAlign.scale: 24.0
+      GoalAlign.forward_point_distance: 0.1
+      PathDist.scale: 32.0
+      GoalDist.scale: 24.0
+      RotateToGoal.scale: 32.0
+      RotateToGoal.slowing_factor: 5.0
+      RotateToGoal.lookahead_time: -1.0
+
+controller_server_rclcpp_node:
+  ros__parameters:
+    use_sim_time: True
+
+local_costmap:
+  local_costmap:
+    ros__parameters:
+      update_frequency: 5.0
+      publish_frequency: 2.0
+      global_frame: odom
+      robot_base_frame: base_link
+      use_sim_time: True
+      rolling_window: true
+      width: 3
+      height: 3
+      resolution: 0.05
+      robot_radius: 0.22
+      plugins: ["voxel_layer", "inflation_layer"]
+      inflation_layer:
+        plugin: "nav2_costmap_2d::InflationLayer"
+        cost_scaling_factor: 3.0
+        inflation_radius: 0.55
+      voxel_layer:
+        plugin: "nav2_costmap_2d::VoxelLayer"
+        enabled: True
+        publish_voxel_map: True
+        origin_z: 0.0
+        z_resolution: 0.05
+        z_voxels: 16
+        max_obstacle_height: 2.0
+        mark_threshold: 0
+        observation_sources: scan
+        scan:
+          topic: /scan
+          max_obstacle_height: 2.0
+          clearing: True
+          marking: True
+          data_type: "LaserScan"
+      static_layer:
+        map_subscribe_transient_local: True
+      always_send_full_costmap: True
+  local_costmap_client:
+    ros__parameters:
+      use_sim_time: True
+  local_costmap_rclcpp_node:
+    ros__parameters:
+      use_sim_time: True
+
+global_costmap:
+  global_costmap:
+    ros__parameters:
+      update_frequency: 1.0
+      publish_frequency: 1.0
+      global_frame: map
+      robot_base_frame: base_link
+      use_sim_time: True
+      robot_radius: 0.22
+      resolution: 0.05
+      track_unknown_space: true
+      plugins: ["static_layer", "obstacle_layer", "inflation_layer"]
+      obstacle_layer:
+        plugin: "nav2_costmap_2d::ObstacleLayer"
+        enabled: True
+        observation_sources: scan
+        scan:
+          topic: /scan
+          max_obstacle_height: 2.0
+          clearing: True
+          marking: True
+          data_type: "LaserScan"
+      static_layer:
+        plugin: "nav2_costmap_2d::StaticLayer"
+        map_subscribe_transient_local: True
+      inflation_layer:
+        plugin: "nav2_costmap_2d::InflationLayer"
+        cost_scaling_factor: 3.0
+        inflation_radius: 0.55
+      always_send_full_costmap: True
+  global_costmap_client:
+    ros__parameters:
+      use_sim_time: True
+  global_costmap_rclcpp_node:
+    ros__parameters:
+      use_sim_time: True
+
+map_server:
+  ros__parameters:
+    use_sim_time: True
+    yaml_filename: "turtlebot3_world.yaml"
+
+map_saver:
+  ros__parameters:
+    use_sim_time: True
+    save_map_timeout: 5000
+    free_thresh_default: 0.25
+    occupied_thresh_default: 0.65
+    map_subscribe_transient_local: False
+
+planner_server:
+  ros__parameters:
+    expected_planner_frequency: 20.0
+    use_sim_time: True
+    planner_plugins: ["GridBased"]
+    GridBased:
+      plugin: "nav2_navfn_planner/NavfnPlanner"
+      tolerance: 0.5
+      use_astar: false
+      allow_unknown: true
+
+planner_server_rclcpp_node:
+  ros__parameters:
+    use_sim_time: True
+
+recoveries_server:
+  ros__parameters:
+    costmap_topic: local_costmap/costmap_raw
+    footprint_topic: local_costmap/published_footprint
+    cycle_frequency: 10.0
+    recovery_plugins: ["spin", "back_up", "wait"]
+    spin:
+      plugin: "nav2_recoveries/Spin"
+    back_up:
+      plugin: "nav2_recoveries/BackUp"
+    wait:
+      plugin: "nav2_recoveries/Wait"
+    global_frame: odom
+    robot_base_frame: base_link
+    transform_timeout: 0.1
+    use_sim_time: true
+    simulate_ahead_time: 2.0
+    max_rotational_vel: 1.0
+    min_rotational_vel: 0.4
+    rotational_acc_lim: 3.2
+
+robot_state_publisher:
+  ros__parameters:
+    use_sim_time: True
\ No newline at end of file

launch/navigation_launch.py

+# Copyright (c) 2018 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument, SetEnvironmentVariable
+from launch.substitutions import LaunchConfiguration
+from launch_ros.actions import Node
+from nav2_common.launch import RewrittenYaml
+
+
+def generate_launch_description():
+    # Get the launch directory
+    bringup_dir = get_package_share_directory('dev_loc')
+
+    namespace = LaunchConfiguration('namespace')
+    use_sim_time = LaunchConfiguration('use_sim_time')
+    autostart = LaunchConfiguration('autostart')
+    params_file = LaunchConfiguration('params_file')
+    default_bt_xml_filename = LaunchConfiguration('default_bt_xml_filename')
+    map_subscribe_transient_local = LaunchConfiguration('map_subscribe_transient_local')
+
+    lifecycle_nodes = ['controller_server',
+                       'planner_server',
+                       'recoveries_server',
+                       'bt_navigator',
+                       'waypoint_follower']
+
+    # Map fully qualified names to relative ones so the node's namespace can be prepended.
+    # In case of the transforms (tf), currently, there doesn't seem to be a better alternative
+    # https://github.com/ros/geometry2/issues/32
+    # https://github.com/ros/robot_state_publisher/pull/30
+    # TODO(orduno) Substitute with `PushNodeRemapping`
+    #              https://github.com/ros2/launch_ros/issues/56
+    remappings = [('/tf', 'tf'),
+                  ('/tf_static', 'tf_static')]
+
+    # Create our own temporary YAML files that include substitutions
+    param_substitutions = {
+        'use_sim_time': use_sim_time,
+        'default_bt_xml_filename': default_bt_xml_filename,
+        'autostart': autostart,
+        'map_subscribe_transient_local': map_subscribe_transient_local}
+
+    configured_params = RewrittenYaml(
+            source_file=params_file,
+            root_key=namespace,
+            param_rewrites=param_substitutions,
+            convert_types=True)
+
+    return LaunchDescription([
+        # Set env var to print messages to stdout immediately
+        SetEnvironmentVariable('RCUTILS_LOGGING_BUFFERED_STREAM', '1'),
+
+        DeclareLaunchArgument(
+            'namespace', default_value='',
+            description='Top-level namespace'),
+
+        DeclareLaunchArgument(
+            'use_sim_time', default_value='true',
+            description='Use simulation (Gazebo) clock if true'),
+
+        DeclareLaunchArgument(
+            'autostart', default_value='true',
+            description='Automatically startup the nav2 stack'),
+
+        DeclareLaunchArgument(
+            'params_file',
+            default_value=os.path.join(bringup_dir, 'config', 'nav2_params.yaml'),
+            description='Full path to the ROS2 parameters file to use'),
+
+        DeclareLaunchArgument(
+            'default_bt_xml_filename',
+            default_value=os.path.join(
+                get_package_share_directory('nav2_bt_navigator'),
+                'behavior_trees', 'navigate_w_replanning_and_recovery.xml'),
+            description='Full path to the behavior tree xml file to use'),
+
+        DeclareLaunchArgument(
+            'map_subscribe_transient_local', default_value='false',
+            description='Whether to set the map subscriber QoS to transient local'),
+
+        Node(
+            package='nav2_controller',
+            executable='controller_server',
+            output='screen',
+            parameters=[configured_params],
+            remappings=remappings),
+
+        Node(
+            package='nav2_planner',
+            executable='planner_server',
+            name='planner_server',
+            output='screen',
+            parameters=[configured_params],
+            remappings=remappings),
+
+        Node(
+            package='nav2_recoveries',
+            executable='recoveries_server',
+            name='recoveries_server',
+            output='screen',
+            parameters=[configured_params],
+            remappings=remappings),
+
+        Node(
+            package='nav2_bt_navigator',
+            executable='bt_navigator',
+            name='bt_navigator',
+            output='screen',
+            parameters=[configured_params],
+            remappings=remappings),
+
+        Node(
+            package='nav2_waypoint_follower',
+            executable='waypoint_follower',
+            name='waypoint_follower',
+            output='screen',
+            parameters=[configured_params],
+            remappings=remappings),
+
+        Node(
+            package='nav2_lifecycle_manager',
+            executable='lifecycle_manager',
+            name='lifecycle_manager_navigation',
+            output='screen',
+            parameters=[{'use_sim_time': use_sim_time},
+                        {'autostart': autostart},
+                        {'node_names': lifecycle_nodes}]),
+
+    ])