Thrust mapping (0-1) to force

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Rinto

• February 09, 2023 08:55

Hi, how do I map the thrust to a force? What's the relationship (linear, quadratic etc?). Does it depend on battery voltage or do you already compensate for that? 

 

Thanks in advance!

 

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  DJI Developer Support

  • February 09, 2023 11:51

  Unfortunately, the flight controller has not released the mapping relationship between throttle value and force, usually the throttle value is related to the actual load and flight environment. In the simulator, a throttle value of 50% will provide upward thrust. And in actual flight, it is necessary to adjust the throttle value in real time in combination with external height positioning.

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  Rinto

  • February 10, 2023 07:53

  What kind of distribution does it follow? Linear/ quadratic, etc? Then I can manually interpolate.
  
  If you don't know, please check the source code to what quantity the 0-1 value is related. PWM to motor ESC? RPM of propellers?

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  DJI Developer Support

  • February 15, 2023 01:36

  Sorry, this part is the part of the flight control, and it is not open to the SDK. We have asked the flight control department before, but unfortunately it has not been provided yet.

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  Rinto

  • February 15, 2023 14:10

  Okay please let me know if you have an update on:

  1. The influence of the battery voltage

  2. The distribution it follows (linear/ quadratic etc.)

  Thanks in advance!

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  Rinto

  • March 02, 2023 13:06

  Reopening this topic, since I have no answer. Can you bring me in contact with one of your engineers who knows more? We can't use an autonomous drone with an unknown mapping and no answer of the dependency on battery voltage.

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