"hi,
I need to purchase this, pls give link where it is available.
regds
sandeep"
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Caleb Chamberlain
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Caleb Chamberlain's Discussions
New multi-rotor autopilot
Started this discussion. Last reply by Sandeep Bajare Jan 11. 7 Replies 1 Like
Putting the Rotorcraft/Accelerometer Question to Rest
Started this discussion. Last reply by Caleb Chamberlain Oct 10, 2011. 14 Replies 5 Likes
Open Source Attitude Estimation Code with Euler Angle and Quaternion Support
Started this discussion. Last reply by Allen Babb Oct 16, 2011. 7 Replies 0 Likes
Caleb Chamberlain's Page
Latest Activity
Caleb Chamberlain commented on Matthew Beck's blog post 3d printable quadcopter!! PL1Q Vampire"Pretty cool! How much does the printed frame weigh?"
Allen Babb replied to Caleb Chamberlain's discussion Open Source Attitude Estimation Code with Euler Angle and Quaternion Support"Just reference to the Earth gravity vector, and use an arctangent function to find the X and Y Euler angles. Be careful about linear accelerations, as they'll throw off your calculations.
Note: the Z Euler angles will be invalid most of the…"
Caleb Chamberlain replied to Caleb Chamberlain's discussion Putting the Rotorcraft/Accelerometer Question to Rest"@Alex
Why do you want to use just accelerometers? You can add gyros without increasing your footprint size - Invensense sells a chip that combines gyros/accels into one small package and a common communication interface.
You COULD use…"
Alex replied to Caleb Chamberlain's discussion Putting the Rotorcraft/Accelerometer Question to Rest"Thanks for your helpful post Caleb. Would you possibly know an answer to the following question:
Attitude estimation with ONLY 3axis ACCELEROMETERS. and nothing else, based on a lowpass filter? where can I find an opensource way to do…"
Alex replied to Caleb Chamberlain's discussion Open Source Attitude Estimation Code with Euler Angle and Quaternion Support"Attitude estimation ONLY 3axis ACCELEROMETERS.
Dear DIYdrones friends,
I'm looking for an Attitude Estimation algorithm, and only have 3 axis accelerometers. I know this will may not be optimal, and will be slow. But, if you know an…"
Caleb Chamberlain replied to Caleb Chamberlain's discussion Open Source Attitude Estimation Code with Euler Angle and Quaternion Support"@Bot
That's great! I'll look forward to seeing what you come up with."
Bot Thoughts replied to Caleb Chamberlain's discussion Open Source Attitude Estimation Code with Euler Angle and Quaternion Support"I'm probably going to be working on something similar over the next few months. Maybe even with the 6DM that I bought. If I ever have something to show for my efforts, will let you know. :)"
Caleb Chamberlain replied to Caleb Chamberlain's discussion New multi-rotor autopilot"I see. Actually, I know of no single reference that is available right now. I learned about most of this stuff while working on my MS thesis."
Akshay Verma replied to Caleb Chamberlain's discussion New multi-rotor autopilot"References about autopilot design, what all instruments are included and how to design them?"
Caleb Chamberlain replied to Caleb Chamberlain's discussion New multi-rotor autopilot"@Tom,
I originally designed it to sell as a drop-in replacement for the Mikrokopter autopilot, and as the autopilot for a potential new quadrotor product. A few higher-priority projects have taken precedence, though, so I haven't…"
Caleb Chamberlain replied to Caleb Chamberlain's discussion New multi-rotor autopilot"@Akshay,
What references are you talking about?"
Tom Yochum replied to Caleb Chamberlain's discussion New multi-rotor autopilot"Nice Caleb!
I have a few questions I am hoping you can answer:
Did you use the same accels and gyros from your IMU board?
Why the two processors? Is one running the GPS/IMU code and the other autopilot code?
Cost? Are you going to be selling…"
Akshay Verma replied to Caleb Chamberlain's discussion New multi-rotor autopilot"Hi Caleb,
Done a great job!
Could you share some references that you were referring?
Regards,
Akshay."
Amr Marzouk replied to Caleb Chamberlain's discussion Putting the Rotorcraft/Accelerometer Question to Rest"Hey,
A friendly quick note: Fig. 7.1 in page 148 says ATMEGA128 and shows an Analog Devices ADIS16355 IMU. I was just skimming through pages :)
Best Regards,
Amr"
Caleb Chamberlain posted a discussionNew multi-rotor autopilot
Hey all, I'm finishing up a new quadrotor/octocopter autopilot design. I just got my second revision board populated and tested. I was excited enough about it that I thought I'd share it... :-D Some of the features of the autopilot are listed below: 1. Onboard gyros, accels, magnetometer, and absolute pressure2. MicroSD slot for telemetry logging3. Dual 72 Mhz ARM Cortex M3 processors (upgradeable to 120 Mhz)4. 8 Hobby PWM outputs for motor and servo control5. 8 i2c pinouts for connection with…See More
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