MultiWii

Hi, I have just managed to load Multiwii 2.3 into my Arduino Pro Mini but the blue led is always blinking( I2C problem ? ) . On multiconf, some datas are wrong and blocked like ROLL. When I flashed the Multiwii2.2 , everything is OK . I didn't find any difference in I2C protocol. I only have GY85 IM...

Hello,

Thank for your explanation. Mathematically it's correct but the weight of the ACC_LPF_FACTOR became very light. ( no impact on the result )

Regards

Hello,

No, it's in multiwiiV2.2 but in an old release ( V1.9 ) the FLP was clearer :

"accLPF[axis] = accLPF[axis] * (1.0f - (1.0f/ACC_LPF_FACTOR)) + accADC[axis] * (1.0f/ACC_LPF_FACTOR);"

Regards

Hi , I can't understand how the acc_lp_factor works . "accLPF32[axis] -= accLPF32[axis]>>(ACC_LPF_FACTOR); accLPF32[axis] += accADC[axis]; accSmooth[axis] = accLPF32[axis]>>(ACC_LPF_FACTOR);" For me a LFP should be like : fXg = Xg * alpha + (fXg * (1.0 - alpha)); Someone can explain the fu...

Hello Hamburger ,

I tried your tips but the result is still the same. Isn't there any soft modification to smooth the ACC answer ?

Regards

Olivier

Hello, I tested the horizon mode with a bluetooth device to see online data with the GUI. I understood the problem. The pitch angle increases slowly ( the heli is always horizontal ) and crashes at 90° value. When the engine is off, no problem the level is good . I didn't find the kind of trouble on...

Hello,

I always struggle with the horizon mode and angle mode. Where can I found the synoptic of PID regulation with angle mode and horizon mode.
With horizon mode, I have a lot delay with my rccommand.

Thanks for your help

Olivier

Hi,

I wonder if it's possible to record datas during flight because I need to understand what happend during flight. I have some understanding reaction .

Thanks

Thanks to you

My tuning is close to yours.

I have
#define ITG3200_LPF_98HZ
and
#define GYRO_SMOOTHING {30, 30, 3}

Perhaps I should be more radical on the low pass filter

Incredible, i really should have a trouble of tuning. Can you give me , the PID values you use for level mode?

Regards

Olivier

Hi Hamburger,

Even with a lot of trim, the heli flight like a stone when I switch from accro to level mode. I can't take off in level mode ( too jerky ) . Can you take off in level mode ?
I will buy a bluetooth device to analyse data during flight .

regards

Led blinks slowly when heli tilted (25 degrees or more I think). For level to work you must at least once do calibration of acc sensor either via gui or your tx with sticks combination. Else the flip is guaranteed. Thanks for you reply . I don't find in the code where the led blinked when the heli ...

Hello, After several months enjoying with my FBL in acro mode , I tested the level mode, which seems to work good when the engine is off, and the crash was very closed. The only things the heli want to do is the back flip . I don't understand. When the engine is stop and I move the hell, the correct...

Hamburger, I expect you need to set phasing differently? (see my previous post for how I think it must be done). Maybe I am wrong? Will find out soon. If it already works for you, please confirm. Please, can you give me the link to your post about the phasing. For me, there isn't any difference betw...

Hamburger,

What do you mean with some "tweaks" for dfc. On my 450 with Tarot DFC head, I didn't make something special. Perhaps I need.

Olivier

Hi,

I have gived up the mag not for tilt reason but because of interaction with tail servo. When I move the tail servo ( not in flight ) the heading change. Nevertheless , according to this article (https://www.loveelectronics.co.uk/Tutor ... o-tutorial) it's possible to have a tilt compensation till 40° (not enough for heli ).

regards

Hi, Some feedback of my integration on my HDX450 with a FBL Tarot DFC. I use an IMU ( GY 85 ) I decided to separate from arduino shield. I put on at the same place of the gyro. It's not the best place for mag because of magnetic interaction with tail servo but it was worst near the controller or bru...

Hi,

I tryied to said , if I want to have the head lock like my GY401, should I active headfreeze function ( with mag ) or should I have to increase the I of the PID yaw.

Patrick,

It means, I need to recompile multiwii_conf.ino with this modification ?

Hi, I always have jerk problem even with high value in low pass filter ( it's better but a lot of lag ... and unstable ). It seems, the trim ( acctrim ) and (offset ) are not applyed. Is there any tip to verify ? When I put a value offset, nothing happends on the servo . Is it normal ? How can we re...

Hi, I had my first flight this afternoon with FBL head and normal mode , after setting up PID for roll and nick (P=3 /I=0.01/ D=10 ) and smoothing (20,20,4) . For the yaw, I kept my GY401 working ( not everthing at the same time step by step ). There're some little jerks for rapid movement but it's ...

Hi, I've finished the integration in my HDX450. It seems to be great but I have something I don't understand. After calib_acc, when I switch from acc_mode to passthru , nothing spends and I find that's good. But when I switch to normal mode, the left and nick servos move slowly to an around 50 offse...

Thanks for your answers. I'll give you feedback after my first tests.

Hi, I'm new user of the Patrick.E code and I have fitted a FBL head on my HDX450 with and the management is made by arduino mini... Before 1st test I have some questions : - Why do you have to connect the throttle to the arduino and not directly to the ESC. You needn't to manage engine for FBL? - In...