Developer

ArduCopter 2.8 / 2.8.1 released

Arducopter 2.8.1 is now in the mission planner and in the downloads area! Remember to do your MP configuration again after loading this code, since it erases your EEPROM and sets it to the new defaults. 

Note: Issues with APM1 user's level feature not working are now resolved.  If you installed 2.8 we highly recommend you upgrade to 2.8.1 as 430 extra bytes of RAM have been freed up which reduces the chance of memory corruption (although we haven't seen any cases of this on the APM2 at least) .

Note #2: this release has not gone out for Traditional Helicopters until they can be tested fully.  Flip and Toy mode have also not been fully tested.

Improvements over 2.7.3:

  • Improved ACRO mode (Leonard Hall)
  • Improved stability patch to reduce "climb-on-yaw" problem (Leonard, Rob Lefebvre, Randy)
  • Rate controller targets moved to body frames (yaw control now works properly when copter is inverted) (Leonard/Randy)
  • Less bouncy Stabilize yaw control (Leonard)
  • OpticalFlow sensor support for APM2.5 (Randy)
  • DMP works again by adding "#define DMP_ENABLED ENABLED" to APM_Config.h You can also log DMP vs DCM to the dataflash by adding "#define SECONDARY_DMP_ENABLED ENABLED" (Randy)
  • Watch dog added to shutdown motors if main loop feezes for 2 seconds (Randy)
  • Thrust curve added to linearize pwm->thrust. Removes deadzone found above 90% throttle in most ESC/motors (Randy)
  • More timing improvements (main loop is now tied to MPU6000s interrupt) (Randy)
  • GPS NMEA bug fix (Alexey Kozin)
  • Logging improvements (log I terms, dump all settings at head of dataflash log) (Jason)

 

Bug Fixes / Parameter changes:

  • fixed skipping of last waypoint (Jason)
  • resolved twitching when no GPS attached (Tridge)
  • fixed loss of altitude if alt hold is engaged before first GPS lock (Randy/Jason)
  • moved Roll-Pitch I terms from Stabilize controllers to Rate controllers
  • TILT_COMPENSATION param tuned for TradHeli (Rob)


Code Cleanup:

  • HAL changes for platform portability (Pat Hickey)
  • Removed INSTANT_PWM (Randy)


As per usual PIDs are optimised for the 3DR/jDrones quad with 850 motors and 10" props. If you're using more powerful motors/props and are seeing bad flight behaviour in stabilize, start by turning down Rate Roll P in 25% steps.

Please note that on this release we've moved the Roll and Pitch I terms from the Stabilize controller to the Rate controller. There's some evidence that says this can lead to flips on take-off if you move the roll or pitch sticks around as you take-off so we recommend you leave these sticks in the middle until you're in the air.

Please feel free to report issues you find in the discussion below and/or add them to the issues list.

Thanks and enjoy!

Tags: ACM, APM1, APM2, ArduCopter, Heli, Quad

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Replies to This Discussion

Permalink Reply by Виталик on January 28, 2013 at 12:39am

Hi. Who has all of the original 3d robotics and quadrocopter. Who is stable flies lay pozhalustay file param, and that I can not adjust the quadrocopter especially pids.


DeveloperPermalink Reply by leonardthall on January 28, 2013 at 1:01am

This is what I am using.

You will want to redo your accel and compass calibration.

Attachments:
Permalink Reply by Виталик on January 28, 2013 at 1:13am

A suit from 2.9 to 2.8.1


DeveloperPermalink Reply by leonardthall on January 28, 2013 at 1:26am

Sorry, I don't know what you are asking.

Permalink Reply by Виталик on January 28, 2013 at 1:38am

param from 2.9 to 2.8.1 will approach


DeveloperPermalink Reply by leonardthall on January 28, 2013 at 2:01am

Ahh, sorry, you were looking for 2.8.1. The Roll, Pitch Yaw should be fine but other than that I can't help you. Sorry I thought you were upgrading to 2.9.

Permalink Reply by Виталик on January 28, 2013 at 11:45am

my vibration
Permalink Reply by Виталик on January 28, 2013 at 11:47am

later. after struggling with vibration. How do you?

Permalink Reply by Harley Engholm on February 10, 2013 at 1:33pm
Randy
Can throttle accel be activated/checked in 2.8?

DeveloperPermalink Reply by Randy on February 10, 2013 at 4:44pm

Harley,

     No, all the accel related throttle stuff is in 2.9/2.9.1 only.

Permalink Reply by Виталик on April 13, 2013 at 2:54am

Please tell me how to set the RTL. Or at least tell me where are the parameters RTL_ALT, RTL_LOIT_TIME, RTL_ALT_FINAL. The first option I found, but others do not see at close range. Mission Planner 1.2.27.

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