Add Gimbal Pitch Speed to Visualize and Address Key Jerkiness in Pitch Changes

Daniel Snyder

One key Jerkiness is Gimbal Pitch.   Having the display of Gimbal Pitch SPEED in the list of Timeline parameters would greatly help prevent this kind of jerkiness in mission planning through better awareness.

 

 

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Comments

14 comments

  • Comment author
    stéphane GARNIER

    That means that jerkiness depends on gimbal speed according to you.
    Is it demonstrated ?

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  • Comment author
    Martin Reading Dronelink Expert Dronelink Expert

    As far as I'm aware gimbal pitch speed is related to how far away from the point of interest you are when you start tracking the POI and also the drones horizontal and vertical speeds as you get closer to the POI and also what type of interpolation you've got set

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  • Comment author
    Jim McAndrew Dronelink Staff

    I think we need to be specific about what jerkiness means. Most of the time this is referring to DL trying to send smooth commands to the drone but the drone not being able to accomplish it due to a wide range of factors.

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  • Comment author
    Mike (Arizona Wyldwest) Dronelink Expert Dronelink Expert

    Hey Daniel. As we discussed on Messenger, those DJI App seatings for advanced gimbal control will control the drones actual speed and smoothness on both. The mission preview cannot know which drone your using and what your Gimbal Pitch settings are set to in the DJI App. Mission preview is giving a good idea of what it will look like but the real world flight may vary especially with the gimbal speed. Any drone rotation or gimbal pitching with my MA2 work great and look slower and smoother then the preview. As Jim stated there can be other factors as described in the link but those DJI App settings make a huge difference.

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  • Comment author
    Daniel Snyder

    All,  Thank you for the feedback.  Let me amend my wording to reduce confusion.  Instead of "Jerkiness" let me call it "Pitchiness".  A too rapidly pitching gimbal makes for a very un-cinematic effect.  Since there are timeline displays for the other rotational speed (Yaw) - can there be one for Gimbal Pitch speed too?   For the current example, wherever the slope of the rotation is "steep" you have a rapid rotational acceleration.   This would present a jerky like experience.

     

    This current "Rotational Speed"  view is very helpful for the planner to avoid both excessive heading rotational speeds and accelerations that would be very un-cinematic in the final video.

     

    So likewise having this same capability to see Pitch Speed would be a great asset to help the cinematographer avoid the same problems with excessive Pitch Speed and acceleration.    

     

    Adding that view is my request.

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  • Comment author
    Daniel Larsson

    Hey, 

    Any updates on this, I have the exact same problem. I want to slowly change the pitch of the gimbal. do you need anything else than Premium Hobbyist for this? 

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  • Comment author
    Jim McAndrew Dronelink Staff

    My previous remark still stands.

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  • Comment author
    Daniel Larsson

    What i mean is in the mission planning on the computer i think that the gimball is rotating too fast. I wonder if you can like successive (slower) pitch the gimbal.

    For example:
    point A: gimbal pitch 20 degrees.
    Point B: gimbal pitch 40

    In this example it changes the gimbal pitch in a second, but I want it to change from 20 - 40 degrees between the whole distance A - B (20 seconds) .

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  • Comment author
    Martin Reading Dronelink Expert Dronelink Expert

    Have a play with the interpolation curve, find out more in Barry Houldsworth very good 5MF on the subject https://www.youtube.com/watch?v=E93pBGAHvEk&list=PLK_joCFfIhJ8Tvsk51zHJWDtVnJ7S0Vln&index=33&pp=iAQB

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  • Comment author
    Daniel Snyder
    • Edited

    Martin - the interpolation works fine for each mission component individually, but does not work when transitioning from one component to another. (For Example - there is no interpolation between an Orbit component and a waypoint component).

    All I was originally asking for was a visual presentation of "Rate of pitch rotational speed"... much like current drone rotational speed - in the mission preview.    Thinking further - this view might be coupled with a new parameter called pitch rotation speed limit in degrees per second.    Display would have been like this, which you can see would help avoid jerkiness in video planning:  

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  • Comment author
    Martin Reading Dronelink Expert Dronelink Expert

    Sorry Daniel Snyder, I was replying to the comment by Daniel Larsson

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  • Comment author
    Mike (Arizona Wyldwest) Dronelink Expert Dronelink Expert

    Daniel Larsson. As Martin explained the interpolation is the way to get it to not snap down fast at any waypoint or path marker if this is what you’re asking. If you want to slow down the actual gimbal pitch speed as well as the aircraft’s yaw, (rotation) rate that is controlled by the drones firmware. You can change the speed and smoothness to the values you want in the DJI app under gain & expo for each.

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  • Comment author
    Daniel Larsson

    Thank you for the explanation Mike and Martin Reading. Yes exactly, I "want to slow down the actual gimbal pitch speed" The interpolation I use for other purposes. 

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  • Comment author
    Mike (Arizona Wyldwest) Dronelink Expert Dronelink Expert
    • Edited

    I set my speed for both fairly low. I don’t remember exactly how they are set but I believe the Gimbal pitch speed is at about 12°s with smoothness of about 20. The Yaw, (rotation) rate at 20°s which is the lowest rate it will go with my MA2 with about the same smoothness. It takes roughly about 3 - 4 seconds to pitch the gimbal from 0° to -90°. Drone heading rotation from heading straight on path to 90° to the right of the path in about the same time. I capture video almost always so it’s important to me to get it to look slower and smoother. I’m sure you will find what you like best after several or more missions. Good luck.

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