TheMann58
 Second Officer
Flight distance : 18669501 ft
United States
Offline
|
NOTE: This is a REPOST of my original post in another thread on this same topic.
Natalia,
I have completed initial extensive testing of beta firmware V01.03.0510 dated 19 APR 2017 by flying nine batteries over the past three days in both windy and calm conditions and, in a word, WOW!
I am extremely pleased and impressed with the ability of my P4Pro with this beta firmware installed to be able to maintain an absolutely level gimbal horizon in all of the following testing scenarios:
1) Flying forward or backward up to full throttle in P-GPS mode with 11 mph winds aloft coming directly from the right side of aircraft. PASSED - absolutely level gimbal horizon.
2) Flying right or left at up to full throttle in P-GPS mode with 11 mph winds coming directly from the right side of aircraft (i.e., when flying to the right I am flying directly into the wind). PASSED - absolutely level gimbal horizon.
3) Flying forward, backwards, left, right and hovering with 3 mph winds aloft. PASSED - absolutely level gimbal horizon.
4) Flying forward or backward up to full throttle in P-GPS mode with 16 mph winds aloft coming directly from the right side of aircraft. PASSED - absolutely level gimbal horizon.
5) Flying right or left at up to full throttle in P-GPS mode with 16 mph winds coming directly from the right side of aircraft (i.e., when flying to the right I am flying directly into the wind). The P4Pro PASSED this SEVERE TEST and was able to maintain an absolutely level gimbal horizon.
6) Flying forward or backward up to full throttle in P-GPS mode with 14-16 mph winds aloft coming directly from the right side of aircraft. PASSED - absolutely level gimbal horizon.
7) Flying right or left at up to full throttle in P-GPS mode with 14-16 mph winds coming directly from the front right side of aircraft (i.e., wind is coming from direction of front right propeller towards center of aircraft). The P4Pro PASSED this SEVERE TEST with strong 45-degree angle winds and was able to maintain an absolutely level gimbal horizon with only one minor issue noted (not a firmware issue): at ground speeds above 24 mph flying to the right directly into 16 mph wind, the gimbal would occasionally become overloaded and tilt over at a 70-80 degree angle (horizon approaching vertical orientation) then snap back to a level horizon. This would not occur at speeds below 20 mph sideways directly into wind. This happened three times in a 20-minute flight.
8) Completed three complete 500-foot-radius POI circles around an apartment complex under construction with gusty 14-16 mph maximum winds while flying at 10.5 mph with no gimbal instability observed and a perfectly level gimbal horizon for the entire POI flight. PASSED - absolutely level gimbal horizon.
9) Flying a long-distance flight at 400' AGL elevation up to a maximum distance of 20,000 feet from home point in 5.8 GHz Auto HD transmission mode with the wind coming directly from the right side of the aircraft on the outbound leg of the flight and 14-16 mph wind coming directly from the left side of the aircraft on the return leg of the flight. PASSED - absolutely level gimbal horizon throughout the entire flight. One minor issue noted - at about midpoint of the flight as I slowed to a near stop above a water treatment pond and tilted the P4Pro camera directly downward with 14-16 mph wind coming from the right, the gimbal "twitched" 10 degrees or so then immediately stabilized. No other gimbal instability was noted throughout the entire 20-minute flight.
NOTES:
A) After installing the beta firmware version V01.03.0510, I performed a "cold" IMU calibration (put P4Pro aircraft without battery in the fridge for 10 minutes, then installed room-temperature battery and immediately execute the IMU calibration procedure).
B) The IMU calibration procedure yielded an absolutely level gimbal horizon, which I tested indoors by lifting the aircraft off its level calibration platform and observing various objects in my kitchen (doorways, cabinet tops, towell bar, etc.), which I have determined to be absolutely horizontal or vertical using a level and observing the live video image with grid lines turned on.
C) After performing the IMU calibration, I then performed a gimbal calibration, which yielded a gimbal horizon that was tilted about 1 degree to the right.
D) I repeated the IMU calibration procedure, which once again produced an absolutely level gimbal horizon on my P4Pro aircraft. So, I did not perform another gimbal calibration.
E) WIND SPEED MEASUREMENT PROCEDURE: All wind speeds aloft were measured by allowing the P4Pro to hover stationary in P-GPS mode at the same elevation as test flight to immediately follow, then switching to ATTI mode and, after waiting 20-30 seconds, observing the direction and reported aircraft horizontal speed in mph on the DJI GO 4 app as the P4Pro drifted with the wind.
F) For all testing scenarios listed above, a PolarPro ND8 filter with circular polarizer was installed on the P4Pro camera. This ND8+polarizing filter is definitely heavier than the original DJI screw-on UV filter for the camera lens.
Please pass on my CONGRATULATIONS and THANKS to the DJI firmware programmers that developed this beta firmware that achieves such extraordinary level gimbal horizon in even the severe testing conditions as noted above. GREAT JOB!
|
|
lvl.2
lvl.4
New
I hope that is only because it's a beta version.. I love having the smoothness turned up to 17, hope this is corrected without messing up the horizon.