"void loop(){Accel(); float pitch = real_x; //should converts accelerometer 8 bit to degrees pitch *= .0078; //i don't know where i got all these constants pitch *= .5; // this may be because i am running it…"
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Paul Triantafyllou
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- Watchung, NJ
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Paul Triantafyllou's Discussions
How Can I Remove Vibration Noise From My Accelerometer?
Started this discussion. Last reply by Brett Smith Jul 24, 2012. 10 Replies 0 Likes
Hi All,I plan on building my own autonomous UAV from scratch. I'm using the following IMU: http://www.sparkfun.com/products/10183Right now, I have…Continue
Lowest ESC Update Frequency? 50Hz Too Slow?
Started this discussion. Last reply by Allen Babb Mar 19, 2012. 4 Replies 0 Likes
Hi Everyone,I'm currently building an autonomous UAV. I've been having issues with PID control and I've tried to increase the frequency of my control loop as I thought that would be the source of my…Continue
Quadrotor Helicopters - Quantifying Their Flight Behavior
Started this discussion. Last reply by Allen Babb Aug 15, 2011. 1 Reply 0 Likes
Hi Everyone, I'm in the process of making an autonomous quadrotor helicopter UAV. A concept that I have not been able to solidify or find anywhere is what exactly quantifies the manuevering and…Continue
Tags: autonomous, UAV, helicopter, control, PID
Senior Project UAV
Started this discussion. Last reply by Squalish Mar 26, 2011. 4 Replies 0 Likes
Hey Everyone, I'm a junior electrical engineering major and for my senior project next year, I've assembled a team of two electrical engineers and two mechanical engineers to design a fully…Continue
Tags: project, senior, autonomous, UAV, college
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Brett Smith replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?
Paul Triantafyllou replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"The Kalman filter slide made me laugh out loud. Informative PDF, thank you."
Bot Thoughts replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"Interested in seeing the code (or link to pastebin or something). If there's an error maybe we can spot it."
Brett Smith replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"I tried to get a grasp of the Kalman filter, but it quickly became too complicated. I looked into a DCM; it seems doable on an arduino board, but I still don't have my head around it.
Good news is: I set up a very basic complementary filter…"
Bot Thoughts replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"I found Kalman filtering for a 3D AHRS solution to be very math-intensive and for me very difficult. I'd spend my time working on dealing with the vibration mechanically long before diving into Kalman Filtering. Also, the ArduPilot…"
Paul Triantafyllou replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"Hi Brett,"
Brett Smith replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"Did you ever find a solution to this?? I am in a similar situation. I am trying to set up a drone on a Eflite UltraStick, and I am experiencing WAY too much mechanical interference. I am just looking into the Kalman Filter for the first time. Did…"
Bot Thoughts replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"Ok... umm... wow, I've looked at SO much. Let's see.... oh, here's a great tutorial on digital signal processing. http://www.dspguide.com/pdfbook.htm Very easy to understand.
Some commonly suggested papers for Kalman…"
Paul Triantafyllou replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"Thank you for your reply. I will investigate MatrixPilot and its documentation. I currently have a long list of things I want to learn and master, Kalman filtering and digital signal processing being among them. It's sort of like an easter egg…"
Bot Thoughts replied to Paul Triantafyllou's discussion How Can I Remove Vibration Noise From My Accelerometer?"If you haven't yet, carefully study the algorithms and approaches of other autopilot AHRSs which faced and dealt with the gyro/accel noise issue -- as well as many subsequent issues.
I suggest starting with MatrixPilot since it is well…"
Paul Triantafyllou posted a discussionHow Can I Remove Vibration Noise From My Accelerometer?
Hi All,I plan on building my own autonomous UAV from scratch. I'm using the following IMU: http://www.sparkfun.com/products/10183Right now, I have two main issues.1) My accelerometer picks up way too much vibration noise from the motors. The raw data is essentially useless unless I heavily filter the data. I do not want to filter the data so much as I'm doing a lot of floating point math and it kills the rise time constant of the…See More
Allen Babb replied to Paul Triantafyllou's discussion Lowest ESC Update Frequency? 50Hz Too Slow?"Some/most ESC's are auto-ranging, which means that they can adjust their frequencies to match whatever reciever they're connected to.
Standard PWM have a 1 to 2ms positive voltage and the rest zero'ed out. Look up "Turbo…"
Paul Triantafyllou replied to Paul Triantafyllou's discussion Lowest ESC Update Frequency? 50Hz Too Slow?"I suppose I should reiterate my question. I've been sending a 50Hz PWM signal to my ESCs but that means I can only update my ESC 50 times a second. I'm using the Turnigy Pentium/Plus 18A ESC.
I tried reflashing them to support higher…"
Paul Triantafyllou replied to Paul Triantafyllou's discussion Lowest ESC Update Frequency? 50Hz Too Slow?"You're saying I can operate my ESCs at higher frequencies without reflashing them?"
Greg Fletcher replied to Paul Triantafyllou's discussion Lowest ESC Update Frequency? 50Hz Too Slow?"ESC's should handle it no problem. I have tested cheap ones to 650 Hz. It's older analog servos that can't handle high update rates. I think Arducopter runs at 400 Hz to the ecs's, not a problem."
Paul Triantafyllou posted a discussionLowest ESC Update Frequency? 50Hz Too Slow?
Hi Everyone,I'm currently building an autonomous UAV. I've been having issues with PID control and I've tried to increase the frequency of my control loop as I thought that would be the source of my problems.I can get my control loop and sensors to operate in the 200Hz+ region. However, the electronic speed controllers I have (pentium/plush 18A) have an update frequency of 50Hz. Is this too slow? I've been trying to flash them and reprogram them to work in the 400Hz region but that may be too…See More
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- About Me:
- An electrical engineering major at The College of New Jersey.
- Tell us a bit about your UAV interest
- I plan on creating a UAV because it combines the hardware and software aspects of electrical engineering that I'm very interested in.
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