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    Starling loosing stability when switching from position mode to trajectory mode

    Starling & Starling 2
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    • I
      iparra
      last edited by

      We are using voxl-mapper for autonomous indoor flights and we are experiencing strong height looses or even drifting sideways when switching from position mode (Drone hoovering in position hold mode with 90-100% QVIO quality) to offboard (trajectory). Sometimes it is a short drop in height, but most of the times the drone reaches the floor or drifts sideways at a considerable speed until we switch to manual mode and land. The times it is able to regain stability, voxl-mapper works as expected. Any idea of what can cause this?

      Thank you in advance

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      • I
        iparra @iparra
        last edited by

        @iparra I have narrowed it down a little. It has to do with apriltag detection. As soon as the service is enabled the drone looses stability even switching to figure_eight mode. The following options were enabled "en_transform_mavlink_pos_setpoints_from_fixed_frame": true, "en_tag_fixed_frame": true. Maybe it has something to do with the transforms. Any idea? Is the use of tag-detector in some way incompatible with autonomous navigation?

        ModeratorM 1 Reply Last reply Reply Quote 0
        • ModeratorM
          Moderator ModalAI Team @iparra
          last edited by

          @iparra Have you gone through the steps in the VIO troubleshooting guide? https://docs.modalai.com/flying-with-vio/#troubleshooting-vio

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          • I
            iparra @Moderator
            last edited by

            @Moderator Not all of them, recalibrated IMU, measured vibrations and some times vibrations were about 5 on the z axis. The problem happens when apriltag detection service is running.

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            • I
              iparra
              last edited by

              When we start voxl-tag-detector service with "en_tag_fixed_frame": true any change to offboard mode makes the drone loose the position, heavily drifting sideways. Isn't the px4 control referenced only to local frame? If so tag relocalization shouldn't affect the hold position. Is there any other configuration we are missing?

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