Re: [Paparazzi-devel] Questions about stability of lisa-l in quad rotor

[evan igor]

Hi;

Thanks for your helpful information and i must take it in my considerations after search and your all words i decided to use Lisa/m with aspirin v2.2 6 D.O.F and i'd like to know your recommendations for any other h/w should i use beside such Gps and airspeed sensor.

On Tue, Jan 29, 2013 at 11:03 PM, Stephen Dwyer <address@hidden> wrote:

Hello,

As far as choosing between Lisa/M and Lisa/L, it depends on your needs. The code running on each is the same, so it is more your preference based on the application, required peripherals that may or may not be onboard, etc. However, Transition Robotics is currently selling finished Lisa/M v2.0 units, while Lisa/L is much harder to come by (besides the aforementioned pcb availability at PPZUAV). In addition, there are many more Lisa/M devices around (especially in the hands of developers).

It is hoped that soon a Gumstix breakout board of sorts will be designed and released to easily interface with Lisa/M and other autopilots, reducing the need of having one onboard Lisa/L. Not sure if this will influence your decision.

Not sure if that helps or just makes it more confusing. Hopefully the former.

Thanks,

-Stephen Dwyer

On Mon, Jan 28, 2013 at 9:42 AM, Sergey Krukowski <address@hidden> wrote:

Hallo!

If you haven’t yet really chosen which board to use, there is a feature list of all autopilots on the following site:

http://paparazzi.enac.fr/wiki/Category:Autopilots

 

Imho, in the heigh-weight multirotor application the main problem is to have a really stable motor control, which means a reliable ESC and its control bus. In that way I wouldn’t recommend to use I2C motor controllers, when you have more than 6 rotors. The I2C bus is very sensible to any hardware problems (bad connection, long wires, ESC problems).

Regards,

Sergey

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