locusrobotics / robot_navigation

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DluxGlobalPlanner: path too close to obstacle #62

Closed dschnabel closed 4 years ago

dschnabel commented 4 years ago

I'm using the DluxGlobalPlanner with AStar and GradientPath to calculate global paths. The problem is that the resulting path is too close to obstacles: image

I was playing around with neutral_cost and scale but the few values I tried didn't make a huge difference on the path. What parameters should be looked at to get a path closer to the one I want?

Used parameters:

DluxGlobalPlanner:
  neutral_cost: 50
  scale: 3.0
  unknown_interpretation: lethal
  path_caching: false
  improvement_threshold: -1.0
  publish_potential: false
  print_statistics: false
  potential_calculator: dlux_plugins::AStar
  traceback: dlux_plugins::GradientPath

  # AStar
  manhattan_heuristic: false
  use_kernel: true
  minimum_requeue_change: 1.0

  # GradientPath
  step_size: 0.5
  lethal_cost: 250.0
  iteration_factor: 4.0
  grid_step_near_high: false
dschnabel commented 4 years ago

Ok, got it the way I wanted by increasing the value for cost_scaling_factor in the inflation_layer of my global_costmap. Old values:

  inflation_layer:
    cost_scaling_factor: 2.20
    inflation_radius: 1.75

New values:

  inflation_layer:
    cost_scaling_factor: 10.0
    inflation_radius: 2.0

This makes the DluxGlobalPlanner calculate a path which is far enough away from obstacles.

tugbakara commented 1 year ago

Is there any solution in source code? Because I already tried all params to achieve yours but I failed again and again . I tried GIMP to draw map for dangereous corners but when someone stands on the robot and robot try to create and follow new path it gets stack in location that I draw in GIMP.