Mirror/ardupilot
5
0
Fork 0
mirror of https://github.com/ArduPilot/ardupilot synced 2025-01-22 16:48:29 -04:00
Code Issues Packages Projects Releases Wiki Activity

Plane: update release notes for 3.9.7

Browse Source
This commit is contained in:
Andrew Tridgell 2019-04-01 17:42:13 +11:00
parent f50a6b59cc
commit 9bc1a537b5
1 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
ArduPlane/release-notes.txt
View File

@ -1,3 +1,21 @@
Release 3.9.7, 1st April 2019
-----------------------------
This is a minor release to fix a single important bug in speed/height
handling. The bug was in the TECS (total energy control system) and
could cause a sustained pitch down due to a transient glitch in
airspeed demand resulting in a large negative pitch integrator.
The log that found the bug was of a quadplane in CRUISE mode, and
resulted in the aircraft forcing nose down for long enough to crash.
The fix includes both protections for the pitch integrator and a fix
for the cause of the transient in airspeed demand affecting the TECS
demanded airspeed.
Happy flying!
Release 3.9.6, 4th March 2019
-----------------------------