"Hi Jan,
You asked me about sampling gyros and accelerometers under low sampling rates. Unless you are doing "dead reckoning" from the accelerometers, (I assume that you are not) get as many gyro samples as you can. Your suggestion of…"
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Jan Vervoorst
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- Urbana, IL
- United States
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Jan Vervoorst's Discussions
Parts for miniquad
Started this discussion. Last reply by Jan Vervoorst Jan 23. 5 Replies 0 Likes
Hi,I recently revised my miniquad design and have some hardware left over from my first version.1. Miniquad frame:This frame is built using 1mm carbon plate and 4mm pultruded carbon tubing. Tubing is…Continue
3.3V voltage regulator questions
Started this discussion. Last reply by Jan Vervoorst Aug 22, 2011. 3 Replies 0 Likes
Hi,I recently had a bad crash and the 3.3V voltage regulator on the Oilpan that is located close to the I2C port was damaged. I replaced it with an absolutely identical chip (got the correct part…Continue
IMU board or magnetometer broken
Started this discussion. Last reply by basshead Aug 16, 2011. 7 Replies 0 Likes
Hi,I suffered a pretty bad crash last week and since then I can't get my compass to work anymore. However, I am not sure if it's the compass that's actually broken or maybe my IMU board.The compass…Continue
Arducopter maximum loop speed
Started this discussion. Last reply by jasonshort May 16, 2011. 3 Replies 0 Likes
Hi,I'm just starting out with my Arducopter project and still have a lot to learn about the code, so pardon me if this question has been addressed before.I understand that the autopilot main loop…Continue
Jan Vervoorst's Page
Latest Activity
Jan Vervoorst commented on Melih Karakelle's blog post Smallest Quadrocopter with GoPro"How is the quality of these new 5" propellers from HobbyKing? Are they well balanced? The fake GWS 5" propellers they had before where very very bad!"
Jan Vervoorst replied to Randy's discussion ArduCopter 2.4 released"Uhm, this may be a silly question, but where do you find the new DCM code on GIT?"
Jan Vervoorst commented on trappy's blog post Monument Valley (TBS @ USA Road Trip)"Wie immer unglaublich! Amazing as always!"
Jan Vervoorst replied to Keith S's discussion Lots of smoke and a loud pop!"It is generally recommended that all ESCs are of the same type, because different ESCs might have different time constants (take different amounts of time to spool up the motors to your input command). Using another ESC might mess with proper…"
Jan Vervoorst commented on Sergiu's blog post ADXRS453 Gyros with Ultrahigh vibration rejection"Why is there a huge price difference between the ADXRS453 and the ADXRS450 when the datasheet doesn't show much difference at all? What am I missing? http://www.analog.com/en/mems-sensors/mems-gyroscopes/products/index.html#MEMS_Gyroscopes"
Jan Vervoorst commented on s.v.itterzon's blog post QRM [DIY quadcopter] update 2"Looks very nice! What's the distance from motor to motor and total weight of assembled frame without any other components?"
Jan Vervoorst replied to Denny Rowland's discussion Stability comes from the FC computer not from the size of the model."I don't think latency is the correct term here! Latency usually means time delay, and time delay of your system is not a function of the airframe. Latency is the time it takes for your transmitter stick input to go the receiver, from there be…"
Jan Vervoorst replied to Denny Rowland's discussion Stability comes from the FC computer not from the size of the model."No surprises at all! He's a great pilot and I'm sure there's many more like him! And you are bringing up exactly the right points:- he's using T-Motor MT2208 motors, very good quality and have plenty of power for their weight-…"
Jan Vervoorst replied to Denny Rowland's discussion Stability comes from the FC computer not from the size of the model."Uhm, no! The pilot (warthox) is so good he could make a barndoor fly like that. He uses standard MultiWii controller and flies in rate mode only, so most of the skill is on the pilot and not on the controller. Not saying that MultiWii is not a very…"
Jan Vervoorst replied to Igor van Airde's discussion Attitude control structure, changing from PI to PID?"The angular rate derived from the accelerometers? Where has this ever been computed, what variable name?
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Jan Vervoorst replied to Jan Vervoorst's discussion Parts for miniquad"Yes, all is sold! I should've mentioned that, sorry!"
Hans Jakob Bosshard replied to Jan Vervoorst's discussion Parts for miniquad"Hi Jan, also via this way. I am very intersted in your frame. I have just received an APM for a Tyni Quad.
I would by the frame, motors and props. I am living in Switzerland.
Best regards
Hans Jakob"
Jan Vervoorst replied to wraith's discussion location of the board on frame"I have implemented the complementary filter algorithm used on APM in Matlab/Simulink in order to test the performance. When shifting the IMU sensor location away from the center of gravity, the measured accelerations are greatly magnified, but the…"
Jan Vervoorst commented on Bill Nesbitt's blog post AutoQuad ESC32 v1r5"Jeff, not sure if these can be flashed, but they are considered by some "ESC experts" to be a good and cheap ESC: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11429And they are currently available, so hurry! I just…"
Profile Information
- About Me:
- Student in control theory
- Tell us a bit about your UAV interest
- I am attempting to build a quadrotor UAV as a testbed for the implementation of adaptive control algorithms
- Hometown:
- Urbana, IL
Comment Wall (3 comments)
- At 4:34pm on November 16, 2011,
DeveloperWilliam Premerlani said… Hi Jan,
If you have some questions about DCM, post them on my comment wall. That way it won't clutter up the forum, but if anyone else is interested in the answers, they will be able to see them. I think that is what the comment wall is for.
Best regards,
Bill
- At 5:54pm on November 16, 2011,
DeveloperWilliam Premerlani said… Hi Jan,
I am not familiar with the ArduCopter implementation. Jason Short would probably be the best one to ask about the ArduCopter strategy for accounting for acceleration in roll-pitch gyro drift compensation.
You have to account for the effect of acceleration on the gravity reference vector used in the roll-pitch gyro drift compensation calculations when the average value of the acceleration in the body frame of reference is not zero over a significant period of time.
Best regards,
Bill
- At 3:25pm on April 7, 2012,
DeveloperWilliam Premerlani said… Hi Jan,
You asked me about sampling gyros and accelerometers under low sampling rates. Unless you are doing "dead reckoning" from the accelerometers, (I assume that you are not) get as many gyro samples as you can. Your suggestion of getting one accelerometer vector and as many gyro vectors as you can in each communication pass of the I2C seems to be the best approach.
Best regards,
Bill Premerlani
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Season Two of the Trust Time Trial (T3) Contest has now begun. The third round was a reliablilty/aerial photography round for both planes and copters, which is now closed. Stay tuned for the next round, beginning soon.A list of all T3 contests is here.
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