Hi!

I was wondering if there is a way for me to see the RPM (angular speed) of each of my motors in the flight logs?

Thank you very much! Any insight will be deeply appreciated!

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • During the flight you can see the SERVO_OUTPUT_RAW mavlink message.

  • Thanks Andre!

    I was wondering if there is a way for me to see flight logs live during a flight. I would like to see how much PWM each motor is getting during real time.

  • As long PWM range is calibrated (and does not "learn" new max along the way)  - it is kind of proportional to the RPM, - with the exception of voltage drops, and PWM changes instantly, while actual RPM takes some time..

    *sensed* RPM/power is a better way to detect minor problems and diagnostic use.  once, when the AP is aware of RPM & Current of each ESC, we will be able to detect all kinds or problems including disintegrated propeller.

  • Thanks for the response, Andre!

    Sorry for not mentioning, yes I am referring to a quadrotor.

    Is it true that the PWM (which can be seen as RCOU in the flight logs on Mission Planner) is proportional to the angular velocity? So theoretically I would just need to find the constant that relates the PWM to the angular velocity?

    Thanks again!

  • Assuming you mean multirotor:

    no, once UAV-CAN ESC's are common, this should be in place, PWM controlled ESC have simplex communication only. 

    On any case, you can add electronics that communicate over mavlink with GCS, and/or CAN/I2C with autopilot and monitor any/all motors if you want, but it requires some electronics and programming skills.

This reply was deleted.

Activity

Jørn Ramnæs liked VIDEO LINK's profile
May 28
Mark Harrison left a comment on Moderators
"Wow, Ning2 looks really great on mobile. I had sort of drifted away as my browse-time went more on my phone, so this is great."
May 28
Hank Deucker left a comment on PIXHAWK
"I am sure most will say not again, Pixhawk telemetry. I do need help and all can be reassured that I have spent many hours scouring the net for useful information. I am not new at quadcopter flying, I started in 2012 and have progressed through many…"
May 28
Hank Deucker left a comment on PIXHAWK
"Tomorrow, I am thinking about the wording at the moment."
May 28
More…