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DEV call 27 Mar 2017 3pm PST = 27 Mar 2017 2300 UTC

@CraigElder wrote:

Copter

  • 3.5 Update
  • Vision Update

Plane
* nice flight of tilt-tri-quadplane
* fixed quadplane transition bug

Issues

  • https://github.com/ArduPilot/ardupilot/pull/5935
  • https://github.com/ArduPilot/ardupilot/pull/5930
  • RC Failsafe handling issue?
    -Helicopter rotor speed control setting does not check for RC Failsafe. I knew this was weak, but assumed that the RC signaling was deterministic. I tested RC Failsafe action a few times, and it seemed to work.
  • RC outputs during Failsafe appear to be non-deterministic. I have logs indicating that ~30% of the time, as RC comes back, just before the Failsafe flag is cleared, the RC output appears to publish an erroneous number.
  • During RC Failsafe, the RC library is logging 874, when no pulses are being sent. Why? It should probably be sending 0, or maybe -1, something that very clearly indicates to consumers that is not a real value.
    874 could be misinterpreted by downstream users of the data.
    I suspect, that as the failsafe clears, a few 874 signals get out sometime. That is likely what is triggering the short motor shutdown.
    Properly protecting the RSC logic with Failsafe checks will solve the problem for helicopters.
    But I think the underlying issue with RC library should be looked at, to prevent future problems.
    Basically, I believe helicopter was the canary in the coal mine.

AP Sync

Hardware

  • CANBus Update
  • Joule carrier requests- sany specific needs, now is the time

GSOC

Posts: 1

Participants: 1

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