MultiWii

jevermeister

Okay, I applied Alex's fix2 on both uplaoded files.

Change of arm following tomorrow.

Nils

jevermeister

I will reupload it tomorrow with the newest code from alex and a first try of your ideas, thanks for your input

jevermeister

couldnt we do something like this? Set a variable true if ACC calibration is activated. If this variable == true switching aux1 will not activate stable mode but capture the sensor readings. Set it to false after completing the procedure. Wich would enable stable mode again. (I am a noob coder, jus...

jevermeister

No problem dude.
We would be very pleased if you contribute to that wiki. I like yoir effort!

jevermeister

Hi,
really!? another wiki?

Why not use this one?

viewtopic.php?f=7&t=661

Nils

jevermeister

Hi, I uploaded a new function into my branch of the SVN: svn/ branches/ jevermeister/ 1.9_inflight_acc_calibration The function is described as follows: A copter is never perfect, if you do a ACC calibration at the ground, you never have a perfectly leveled ground or an exactly built copter. I thoug...

jevermeister

shoot me!!!

bad, VERY BAD Typo!!!!!

jevermeister

Kees: About the channel layout: left stick: throttle and yaw, right stick: Pitch and roll? So to activate the function throttle down and full yaw left and pitch forward and roll right. I wil review the code and see where the problem is, maybe it is too specific for my setup sorry for stealing your t...

jevermeister

About the usefulnes of the autocalibration: I was in the hills today and had no flat surface to do the calibration, so my new function was very handy

jevermeister

You are right with the new topic. dont forget to take back the trimming? i need to talki to alex about that, I take 50 values for calibration, while alex takes 400, maybe it is not enough. +1 on PID Parameter saving in GUI for import/export (already possible on Android Tool) +1 on different paramter...

jevermeister

Hi Phebus, Can you also make another test, the motor is running but sensor not touching central plate, jut to make sure, that what you see is acceleration, but not electromagnetic interference from ESC's. On this picture of my oscilloscope, the switching of motor poles is at 750 Hz corresponding to...

jevermeister

It is easier and dependable.

On the ground calibratiin does not work.you nearly always need to do some trimming via trial and error.

It is my personal opinion,that this function is needful. In theory,this should be the best way to finetune the levelmode to perfection.

Nils

jevermeister

Hi, my Bad, maybe I am a little too deep in the code. Okay you need to hold both sticks like described in the same moment. You should watch what is happening in the gui without a lipo, you can calibrate the acc via gui while the copter is tilted and then follow the procedure. It works in Acro and Ho...

jevermeister

Hi, I just uploaded the inflight ACC Calibration into: svn/ branches/ jevermeister/ 1.9_inflight_acc_calibration/ I would be happy if someone tests it, I did some flights indoor with it and the results were good. Just be careful not to crash your bird. Do a ground test first. I included a HowTo. Nils

jevermeister

Sorry for the return with my problem:

does noone have these twitches while in acc mode??

Nils

jevermeister

Repeat the Gyrocalibration if the copter is moved in the process of calibration

jevermeister

Autamitc inflight ACC calibration.

I will supply you with the code next week.

nils

jevermeister

I tested it with 115200 on my flyduino, the data looked good, but I have not flown it yet...

Nils

jevermeister

I like that, thanks hamburger

Nils

ps.: Next try to include my inflight acc trim

jevermeister

Ok, I did some thinking and in my opinion vibrations are more of a problem for an ACC sensor. A gyro should not recognize them as long as they are not angular. But a vibration is a wave of accelerations mostly linear. So my vibrations are ruining the sensor read. This is just my theory and that stan...

jevermeister

Hmm, damn, I thought we had the solution... But we should not forget the most important fact: Phebus said, that it is a vibration issue. I had my first BMA020 fixed with sticky foam like the gyro but on my new copter I use the flydusense 2 and the BMA020 is fixed with pinheaders. I did not have the ...

jevermeister

I tested that but I am afraid that does not work, stillt twitches, might be even worse.

Sorry...

Nils

jevermeister

Really strange behavior you are describing there. I have not tested it in flight yet. But the effect only occurs if I have the gopro onbaord, because the copter is heavier I have to set higher throttle and this influences accZ a lot. Anyway: no drift in the basement without camera... Sa we have to w...

jevermeister

Okay, I just tested this fix of yours the same way I tested before: This is the result: 1. Motors off, copter flat on table, Fix applied: http://dl.dropbox.com/u/9886652/accdrifttest/007-dev20111029%2Cmotors%20off%2C%20acczfix%20applied.png 2. Motors on, full throttle flat on table, fix applied: htt...

jevermeister

http://scotandlinnie.com/multiwii19.jpg after uploading 1.9, this is what i get when i turn on stable mode with motors off sitting on a level surface, turn it off and it goes flat. Hi Alex, hi guys, first off: Thank you for your work, I was very looking forward to the release and jsut tested it in ...

jevermeister

Remember my bench test!? Try it for yourself and watch the gauges and especially AccZ, Alex implemented a feature to turn of unwanted readings in the grapics.

Just be very very very VERY V-E-R-Y careful with the props!!!!

Nils

jevermeister

Same for me here.
I did some FPV too and was pretty happy with the nodrift situation.
I am one of those who suffer from the BMA0202 ACCZ Problem...

jevermeister

Hi,
I wrote something in my blog that might be interesting:

http://ncopters.blogspot.com/2011/11/flyduino.html

I would like to thank Paul who is supplying me with alle the prototypes and the stuff I need....

jevermeister

Hi, Paul from Flyduino sent me a GPS bob to test with but I have some startup problems. I use a FLyduino v2.1 and I am unsure which serial I have to use with the 20111029 DEV version, I need to use the serial Port with RX3 TX3 written on it, because the bob does not have the smal gps connector yet. ...

jevermeister

I know and understand you may not want to hear this but I have two of the BMA020, one is junk and the other I get some very weird readings from it. No probem richie, if it really is a bad sensor I will replace it I just want a good copter. Any tips for a better sensor? What about the standard nunch...

jevermeister

Sorry, forgot that, I edited the first post:

it is a Bosch BMA020

@ziss: I will do that tomorrow night: the walking dead are waiting

Nils

jevermeister

ziss_dm wrote:Hi,

3) With not TRUSTED_ACCZ you cannot use MAG and Alt. Hold.

Thanks for the info

that is sad news...

I wonder what is causing this mess..
maybe richie is right and the ACC is s**t

jevermeister

send me one

But after the test I WILL keep it

jevermeister

Hi Alex, I did some testing today: The setup is as follows: Flyduino v2.1 Genuine WM+, BMA020, BMP085, HMC5883L, QuadX, SumPPM, HK SS18A ESC, eMax CF2822 I have my Copter stationary on the table and pressing it down while I power up the engines in acro mode/hover mode 1. Test: Multiwii 1.8p2 with im...

jevermeister

Hi Alex, good news, I am looking forward to 1.9 hopefully the devs of the android tools can keep up, those tools are pure luxury for conficuration in the field. My question is: Do you have a clue why the ACCZ is behaving like this? Is it a problem with the sensors (defective hardware) or is there so...

jevermeister

Hi, are you using the 1.7 stability mode in the dev version? This code also affects the mag. I had true north with the mag in 1.8 and 1.8p2 but with the stability mode imported into 1.8p2 my mag is showing east when it is heading north. I believe this is a mistake in the old 1.7 code (the mag code w...

jevermeister

Hi Alex, hi richie, sorry for my last post. I calibrated and trimmed the acc but the problem persists. BUT: I flew with 1.7 Code activated today and have the same drift. So I think the problem is with my setup. That is very weird since the copter seems to be level when lying on my table - I need som...

jevermeister

Hi again,
I put my normal compass onto the flyduino while throttling up and even this compass is changing it's heading.
I think I have some pretty strong fields in there...

Nils

jevermeister

Hi,
I relocated the Mag to the top of the flydusense but the disturbances by a running engine are even stronger now.

The Mag is now near to the PWM wires from Flyduine to the ESCs, is this a problem?

Nils

jevermeister

Hi Alex.
I did some testflying today.
I am not very happy with the results. Tere is still a constant drift.
It was alittle windy though but the drift is there. It is not connected to the wind.

I have some vibrations in one motor so I will try again tomorrow.

Nils

jevermeister

Hi,

will there be an update, so that it works with the GPS code of the current dev?

Because of the new EEPROM Parameters it does not work anymore...

Nils

jevermeister

Hi, I have noticed that my MAG hold feature is strange when I accelerate the copter. So I tested it without props in the "Lab". I noticed that the direction starts to jitter - I think this is a problem with the currents, that go through the ESC cables right? So relocating the mag would sol...

jevermeister

Hm, dev mag worked well the last days in stationary flight, but if I try some action, the copter randomly changes directions. I did some ground testing by tilting the copter: There were only minimal fluctuations in directions while tilting it. ^°° But when I start the motors and trottle up while pre...

jevermeister

´Don't know. how many settings can you modify? The Super Simple only have Brake and Lipo/NiMh.

jevermeister

If anyone is interested: I fixed my problem by decreasing Level P by a few digits.
Now it is rock solid...

jevermeister

Ok Alex, I flew the new version twive now: 1. Test indoor: I noticed a constant drift to front right. After I did a lot f calibration via stick input it was back after a few moments. Still front right. It might be the ground effect though. 2. Test outdoor (sorry very windy conditions right now) I th...

jevermeister

A few days ago I mentioned my problems with the escalation of correction in stability mode: My first copter had no problems like this: Only difference are the ESCs, I use Super Simple 18A instead of turnigy Plush25 now, every other detail is the same (except that I bought them all new ) Here is a Vi...

jevermeister

Hi Alex, in the meantime I analyzed the sourcecode and saw that the compass heading is way more simple, I tried to inject the new one into the old code but this is far above my udnerstanding. I will try the new code as soon as possible and report back. @dramida: The compass is ok, I tested it with 1...

jevermeister

Hi Alex, I tested the dev Version where one can enable the old stability mode. The stability works better for me now. But I think I have a small problem there, it seems that the compass mode works different now - my xopter is twitiching back and forth all the time while trying to keep the current he...

jevermeister

Maybe we can reuse the stable mode of 1.7.
I can ask alex if he helps me in inserting it into 1.8, since there are numerous problems with the stable mode.

Do you have problems with acro mode and the escs?

Nils

ps.: I really wonder what is wrong here...

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