AVR Atmel for UAV

[andyg]

I have been contemplating a project since I have gotten into microcontrollers. Would it be possible to make a UAV out of a AVR microcontroller some accelerometers and a digital compass? I still dont know how I would aquire the altitude and airspeed though. I was thinking that just to get the plane in the air and flying straight and level would be great, and then incorporate a gps into the design so it could have waypoints. Any ideas or suggestions? THANKS

[Comatose]

Accelerometers by themselves don't make for a very good attitude sensor. GPS will give you altitude and airspeed. A digital compass, gps and an extremely stable (thing gas freeflight) airframe should do the trick without having to resort to active attitude control. Throttle controls altitude, rudder controls heading.

An AVR will be fine for your micro.

[momomomo]

Altitude and airspeed can acquire form pressure sensor
GPS can send air speed data and altitude data but it not accurate. altitude error approximate >50 m.

i think ATMEL 8 bit rise microcontroll can,t not use for this project. Becasue it not cappability for calulate all function for filght control ext. travel path, control loop servomotor, ground communication, mathmatic algorithm ...

i think must use >8bit microcontroller

Now i use two 16 bit rise CPU for my uav. all sensor and feature is list below
1 GPS
1 Altitude sensor
1 airspeed sensor
3 axis accelerator sensor
3 rate gyroscope sensor
1 RF communication to ground station
1 Multiplexer
1 RC reciever
1 mass storage datalogger
all system provide in airplane and helicopter. and now testing algorithm

Next generation i will use 32 bit MCU because now it nearly of system capability

[LukeZ]

momo, what sensors specifically are you using for altitude and airspeed? I'm getting ready to purchase mine and am curious about what others are using.