Tuning Multiwii Rate settings

[teslahed]

I've been looking into tuning my Multiwii Rate settings for better acrobatic flight.

So far I've been using these settings;



But have just changed them to this;




Based on what i read here;

Hi,

At the beginning, there was only the pitch / roll rate settings.
It was introduced because the looping and flips were way to slow with default settings.
The principle is to decrease to correction control when the sick is far from the center.
This way, the rotation rate is less constrained when the sticks are not centered => with a value of 1, you will have the maximum possible rotation rate and the ability to do multiple flips per seconds.
It acts as a "super expo", and you it doesn't change the accuracy near the center.

The RC RATE was introduced after specially for Warthox
The purpose is just to be able increase the rotation rate in a linearly way.

So it depends on what you expect.
- want to fly cool and be able to do fast flips sometimes => pitch/roll rate
- want a very nervous multi in all circumstances => rc rate
Now you have the choice, and you have also the rc expo curve acting as a third parameter.

The above post was nicked from the Multiwii forums. I hope Alexinparis doesn't mind. You can find the original thread here;

http://www.multiwii.com/forum/viewtopic.php?f=17&t=1346

In the past I've just been upping the individual Roll/Pitch and Yaw Rates, but these just make things twitchier at the extremes of travel. Hopefully upping the main 'RC Rate' will give a smoother response when pulling stunts compared to upping the individual Roll/Pitch and Yaw settings.

[neagron]

Hi,I would be inclined to have the rates on the GUI high,then you can adjust it on the transmitter for flight modes 1,2,3,4 and 5,if you whant,Marty.

[Gaza07]

We used to set planes up for maximum movement mechanically and then set dual rates and expo to tone it down for different types of flying 

[teslahed]

I've been looking at the other PID settings i've been using and discovered i can up the P setting quite a lot (6.5 from 4.5). I'm running simonK flashed ESCs and i've set the Multiwii code to update at the faster rate;

Code Select Expand

/**********************************    I2C speed   ************************************/
    //#define I2C_SPEED 100000L     //100kHz normal mode, this value must be used for a genuine WMP
    #define I2C_SPEED 400000L   //400kHz fast mode, it works only with some WMP clones



After doing this i was able to up P quite a bit before i started getting oscillations. My quadcopter seems to be flying a bit better now.



Quadcopter Practice - flips, loops and flying downwards

[Gaza07]

I might try my board with the higher speed I know the older sensors wouldnt work at that speed but will try my mpu6050 paris board