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Attempt to improve odometry using Opticalflow(&rangefinder)

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  • Jetson NanoJ Offline
    Jetson NanoJ Offline
    Jetson Nano
    Veteran
    wrote on last edited by
    #1

    Hey @Eric-Katzfey, @James-Strawson @Tom-Kaufmann,

    I've been using Starling for quite a while. Congratulations on a great product.
    One of the things I noticed was that when using voxl-mapper for a significant time (like 15mins), the accumulated drift becomes a serious issue. I want to try and reduce the accumulated drift.

    An option to solve this issue is to use an OpticalFlow/Rangefinder with an external FC. I have completed this setup successfully. I can use my MAV in position mode with the fused odometry without issues. VOA works as well.

    I know from the docs and GitLab that voxl-mapper takes 2 inputs whub_body_wrt_fixed and tof. Is there a way to pass the fused odometry instead of whub_body_wrt_fixed? [ I want the mapper to use this data instead of whub_body_wrt_fixed]. The message type of the fused odometry is nav_msgs/Odometry.

    1. Will I need to modify the voxl-mavlink-server to achieve this?
    2. How do I get the mapper to use the fused odometry data?
    3. How do I synchronize these new position estimates and the pointcloud?

    I'm currently working on this project. So any suggestions or ideas will be instantly implemented, tested and reported back. i hope to hear from you.

    Thank you

    Jetson NanoJ 1 Reply Last reply
    0
    • Jetson NanoJ Jetson Nano

      Hey @Eric-Katzfey, @James-Strawson @Tom-Kaufmann,

      I've been using Starling for quite a while. Congratulations on a great product.
      One of the things I noticed was that when using voxl-mapper for a significant time (like 15mins), the accumulated drift becomes a serious issue. I want to try and reduce the accumulated drift.

      An option to solve this issue is to use an OpticalFlow/Rangefinder with an external FC. I have completed this setup successfully. I can use my MAV in position mode with the fused odometry without issues. VOA works as well.

      I know from the docs and GitLab that voxl-mapper takes 2 inputs whub_body_wrt_fixed and tof. Is there a way to pass the fused odometry instead of whub_body_wrt_fixed? [ I want the mapper to use this data instead of whub_body_wrt_fixed]. The message type of the fused odometry is nav_msgs/Odometry.

      1. Will I need to modify the voxl-mavlink-server to achieve this?
      2. How do I get the mapper to use the fused odometry data?
      3. How do I synchronize these new position estimates and the pointcloud?

      I'm currently working on this project. So any suggestions or ideas will be instantly implemented, tested and reported back. i hope to hear from you.

      Thank you

      Jetson NanoJ Offline
      Jetson NanoJ Offline
      Jetson Nano
      Veteran
      wrote on last edited by
      #2

      @Chad-Sweet, @James-Strawson, @tom any updates?

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