Dean has posted a pdf spec sheet for AttoPilot. Here are the basics:
Specifications and Features:
Small size: 1.0 ounce control unit 1” x 1” x 1.5”, 2.6 ounces total with GPS and all sensors
6 servos and 6 R/C inputs: 4 flight control + 2 auxiliary servos. Elevon and V-tail mixing are easy to setup. 100% compatible with all 1-2ms pulse 5V
and 3V logic R/C receivers, and the newer 2.4GHz R/C systems
Flight modes (4):
• Autonomous – specific coordinate flight plan, or template plan
• Autopilot bypass; remote radio control with Elevon or V-tail mixing
• Remote radio control with autopilot stabilization assistance for pitch and roll
• Remote radio control with autopilot stabilization for pitch and roll plus navigation; fly by wire
Stabilization system: 50 Hz attitude control with automatic control gain scheduling based on airspeed. Elevator gain scheduling for optimal altitude
control through turns
Onboard data logging: 40+ parameters logged as a comma-delimited .txt file to removable micro-SD media
Two-way telemetry: Downlink of 3 nmea GPS sentences plus a proprietary $ATTO nmea message for live moving map in 3D plus virtual cockpit, real
time flight plan editing, commanded mission abort, and semi-autonomous flight
List of sensors:
• Pressure (2): Pitot airspeed and Barometric altitude
• 3-axis horizon sensing with dynamic bias correction using other sensors as cross reference
• 5Hz GPS with added data smoothing via real time least squares fits
• Power sensing: 0-53 Volts, 0-92 Amps, 0-4900 Watts. Energy consumption tracked to 210 Amp hours (Ah)
• Auxiliary analog input for user defined function (temperature probe, 2nd voltage or current sensor, etc…)
GPS: 5Hz update rate, 10 ft CEP (circular error of probability), DGPS (differential GPS) enabled
Waypoints:
• 100 user defined waypoints: lat, lon, altitude, airspeed, and multiple trigger options
• Lat and Lon to 5th decimal degrees (3 ft) and 3 ft for altitude
• Return-to-home position: defaults to start location or specify at a remote location
• Create waypoint paths graphically with point and click ease on your PC, with or without internet connection
• Waypoint file optionally may be marked as a template. AttoPilot remaps a template path to current location upon GPS lock at power up.
Useful for photo mapping grid at various flight locations without a laptop PC in the field. A big saving of pre-flight setup time for multiple
repeated missions in various locales.
Triggers:
• RTL (return to launch) based on low pack voltage, mAh consumption, or maximum time allotment
• Loiter at waypoints, specify circle radius, altitude, direction, and duration
• Auxiliary servo or logic controls at specified waypoints or between waypoints with time or distance intervals
• Distance interval triggers are perfect for grid photo mapping
Barometric altitude: Estimation to 0.3 ft and real world control to +/- 6 ft. Barometric climb rate estimated to 0.3 ft/s
Maximum Limits:
• Distance per waypoint leg: unlimited
• Flight plan total distance: unlimited
• Turn rate: 120 deg/s
• Pitch and roll rate: 300 deg/s
• Pitch angle: 60 deg
• Roll angle: 60 deg
• Altitude: 30,000 ft barometric and 60,000 ft GPS
• Airspeed: 125 mph via Pitot tube
• Speed: Above 125 mph, GPS speed is used
January (depending on cables arriving and plastic cases done at injection molder). Although Atto does a heck of a lot more than the Picopilot NAT (in fact it exceeds the U3500FW but with price savings of thermopiles), I decided to start Atto v1.8 at $800 to go head-to-head with the Pico-NAT.
The digital values are there, but video resolution was too poor to show it. I also think they number boxes should be about 2X the size. I did more flights this morning with 2x the video resolution, and will post a 14th video on RCGroups on the same page
Michael, I lost the link you sent for MicroGS... I can't even seem to find it here. Anyway, I have the telemetry downlink data you asked about. Today I did a 20 minute flight with system on the ground logging telemetry downlink byte stream to micro-SD card. I can give it to you as a "TEL.txt" file, or send you a simpe hardware item and micro-SD that replays the data into a USB COM port as if it were a live downlink. Should be very useful for testing a live virtual cockpit once you get the parsing setup.
Oops, now I see it is MicroGCS, not microGS.. will try again
Comments
January (depending on cables arriving and plastic cases done at injection molder). Although Atto does a heck of a lot more than the Picopilot NAT (in fact it exceeds the U3500FW but with price savings of thermopiles), I decided to start Atto v1.8 at $800 to go head-to-head with the Pico-NAT.Any ideas when it will be avalible and what we can expect to pay????
(going to be used on a moddified 4.0m motor glider with gimbal...... I Hope ;)
Cheers
Jamie
This is just display of some downlinked parameters, not uplink control of plane (coming soon). Check it out!
MicroGCS still will not run on W2K.
Jim
Oops, now I see it is MicroGCS, not microGS.. will try again
Chris is relaying the Atto news.