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    VOXL M500 vision problem!!

    VOXL Flight Deck
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    • Vũ Văn LongV
      Vũ Văn Long
      last edited by Vũ Văn Long

      Hello, me again my voxl m500 frame is driff while fly in position mode Screenshot from 2021-01-20 10-42-11.png

      here is the voxl/vision-px4.conf text. last time after reset the configuration to the factory -> then i also changed the offboard mode to "off" and the m500 can fly in poistion mode but the performance is not good, it's mean sometime the the driff was maintained. i think the problem is not here. (about reset the vision-config to the factory, i just reset and not config anything...
      pls help me!

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      • Chad SweetC
        Chad Sweet ModalAI Team
        last edited by

        Is the tracking camera looking at interesting "features" when it takes off, or is it just white floor? If it can start on a carpet or something, the vision system will have something to track. this will help VIO reduce drift.

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        • Vũ Văn LongV
          Vũ Văn Long
          last edited by

          it just is a whitle floor like this 140399418_1382482975425604_1999387540459859908_n.jpg

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          • Chad SweetC
            Chad Sweet ModalAI Team
            last edited by

            Can you put some pieces of duct tape on the floor or something to make it more interesting to the VIO system? Especially since it looks like that floor might be reflective. Random small pieces of tape, like electrical or duct tape, would likely help.

            You can monitor the VIO stability on QGC. Those numbers should stabilize after takeoff, but obviously you want them stable on the ground too.

            Vũ Văn LongV 1 Reply Last reply Reply Quote 0
            • Vũ Văn LongV
              Vũ Văn Long @Chad Sweet
              last edited by

              hi, here is the video i just captured https://drive.google.com/file/d/1Am63zD09am8nx_BBpAB2JfTYcf_IFMST/view?usp=sharing

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              • Vũ Văn LongV
                Vũ Văn Long
                last edited by

                the local NED position is look good at the init state as well as when i move the drone into the other location.

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                • Chad SweetC
                  Chad Sweet ModalAI Team
                  last edited by

                  thanks for sending, I will pass along to someone more familiar. Was this all working before? Do you know what has changed?

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                  • Vũ Văn LongV
                    Vũ Văn Long
                    last edited by

                    last week it used to work normally. i did't changed any strange thing, just re-configuration the drone to the factory state. by "voxl-configure-vision-px4 -f" to take again the NED position cuz before that i had config vision lib by "voxl-configure-modalai-vl" and the local poistion is lost.

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                    • Vũ Văn LongV
                      Vũ Văn Long
                      last edited by

                      pls help me soon. we can set up an online support via teamview to make the problem more clearly.

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                      • James StrawsonJ
                        James Strawson ModalAI Team
                        last edited by

                        Does this behavior only occur in PX4 position mode? Does it fly in PX4 manual mode?

                        Vũ Văn LongV 1 Reply Last reply Reply Quote 0
                        • Vũ Văn LongV
                          Vũ Văn Long @James Strawson
                          last edited by

                          @James-Strawson yes,we only test uav in position mode. we didn't use manual for testing.

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                          • Chad SweetC
                            Chad Sweet ModalAI Team
                            last edited by

                            Please try manual mode. it seems there might be a PX4 parameter mismatch. It would be good to see if the m500 flies properly without VIO.

                            @modaltb Do you have a pointer to the Flight Core factory parmeters?

                            The VIO indoor EKF parameters are here

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                            • modaltbM
                              modaltb ModalAI Team
                              last edited by

                              There's a few files (as we use DRY even on params 😉 The procedure to do this is here

                              When you reload the airframe (via these parameters) you'll end up losing calibration and having to go through the calibration process. This is documented here

                              You'll end up loading these, in this order:

                              • configures core airframe for m500 with 4S battery (standard):
                                https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/raw/master/platforms/v1.10/m500_4s_config.params

                              • VIO indoor EKF
                                https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/raw/master/helpers/ekf2_indoor_vio.params

                              • Serial params (to be safe, these should be set by default)
                                https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/blob/master/helpers/mavlink_serial_ports.params

                              • If needed and applicable, radio
                                https://gitlab.com/voxl-public/flight-core-px4/px4-parameters/-/blob/master/helpers/gimbal_dx8_config.params

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