Shyam Balasubramanian
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Shyam Balasubramanian's Discussions

Regulations for outdoor multicopter flight

Started this discussion. Last reply by CrashingDutchman Jan 30. 1 Reply

Hi All,I have been pursuing a research project at a company (in Netherlands) where I need to occasionally fly waypoints outdoors. The task is an autonomous flight within line-of-sight and and some…Continue

Tags: Regulation, Quadcopters

Motors stuck and grumbles.. RC Timer 5010-14, 360kV..Why??

Started this discussion. Last reply by Shyam Balasubramanian Dec 5, 2013. 4 Replies

Hi All,I took a flight today with my giant copter, I found 2 of the motors were not responsive.I tried to spin the motors using simple motor spin test using CLI test in Mission Planner.'Hear' the…Continue

Tags: RC, equipment, 2.X, Arducopter, Planner

So, are we "really using" MPU-6K features for APM 2.5+ ?

Started this discussion. Last reply by Shyam Balasubramanian Nov 15, 2013. 6 Replies

I Quote from APM 2.x release notes:"We’ve tested it (APM 2.x) for months, including lots of flying, and it…Continue

Tags: Algorithms, AutoPilot, ArduIMU

Copter jumping Up-Down constantly without input in Alt-Hold (with sonar + baro)

Started this discussion. Last reply by Randy Dec 20, 2013. 70 Replies

Hi Everyone,There are a couple of people I know who have already faced this in RC5. In 3.0.1 I see that I do not get issues, so posting it as a separate forum.I am using sonar (XL-EZ0, MB1200) +…Continue

Tags: Arducopter, 2.X

 

Shyam Balasubramanian's Page

Latest Activity

adam bazley replied to Shyam Balasubramanian's discussion Triggering a Camera: APM or Arduino
"Hey Shyam sorry to keep asking questions about this but I'm getting errors. I have this in the userVariables.h file const int camPin = 8; pinMode(camPin,OUTPUT); unsigned long alphaMillis = millis(); then in the UserCode file i have void…"
Apr 9
adam bazley replied to Shyam Balasubramanian's discussion Triggering a Camera: APM or Arduino
"that looks great thanks!"
Apr 9
Shyam Balasubramanian replied to Shyam Balasubramanian's discussion Triggering a Camera: APM or Arduino
"Hi Adam, To your question: Yes, it was in the Arducopter Arduino code. Hardware I used a simple thyristor circuit in between APM and DLSR camera. I attached that to the DLSR camera to trigger the photo. I send a simple high digital pulse (5V when…"
Apr 9
adam bazley replied to Shyam Balasubramanian's discussion Triggering a Camera: APM or Arduino
"Hi Shyam The code that you wrote to trigger the camera, was it written in the ArduCopter arduino code ? if so where did you write it? Im trying to set a Quadcoper up so that it takes a photo at every waypoint by default. My logic is that i can put…"
Apr 9
Shyam Balasubramanian replied to John Leach's discussion Mission Planner 1.2.50+ on Ubuntu Linux with mono
"Hi Meine, While updating, after editing repo, it says: Err https://launchpad.net precise/main amd64…"
Apr 8
Shyam Balasubramanian commented on Bill Bonney's blog post Announcing APM Planner 2.0 RC1 -- the cross-platform GCS for Mac, Windows and Linux
"Hi Bill, Nice work! I would want to run this on my Ubuntu 12.04 LTS. Would this work? I see a link here, which when installed for my Ubuntu for complaints that libudev1 >386. Also, I tried to compile the APMPlanner similar to done on Raspberry…"
Apr 8
Shyam Balasubramanian replied to Randy's discussion ArduCopter-3.1 released!
"@Willy,  I think something is wrong with the setting up of Loiter_Circle, something looks wrong there. Have you mentioned the number of circles to take, and the radius of the circle. I believe it is going to the infinite mode and it stucks…"
Mar 18
Shyam Balasubramanian replied to Alexey Kozin's discussion arducopter compass gain in the group ArduCopter User Group
"Good observation, it does happen. However, it is the rate at which the compass values are updated (in loop) and averaged. I believe there is a parameter for this in Mission Planner settings that will lead to a faster convergence. Someone can point…"
Mar 14
Juraj Kolesar replied to Shyam Balasubramanian's discussion MAVLink Tutorial for Absolute Dummies (Part –I) in the group ArduCopter User Group
"Hi Shyam, Yes we have tried it. As you can see here https://groups.google.com/forum/#!topic/qgroundcontrol/dk3-ekMhxPI MissionPlanner works ok, but it is in C# and debugable mainly under Windows. Our libraries are in C++ using Qt. And we all are…"
Mar 12
Shyam Balasubramanian replied to Shyam Balasubramanian's discussion MAVLink Tutorial for Absolute Dummies (Part –I) in the group ArduCopter User Group
"Hi Juraj, Have you tried using qgroundControl first? This might be an alternate to using Mission Planner. You just have to establish connection with the GCS on your computer and it will auto list all the commands coming in from the APM and going to…"
Mar 11
Shyam Balasubramanian replied to Shyam Balasubramanian's discussion MAVLink Tutorial for Absolute Dummies (Part –I) in the group ArduCopter User Group
"Hi Phonix, If you are just starting out with a secondary controller, it might be good to use a beaglebone or Raspberry Pi as there is a lot of support there for it. I have tried it on the Rpi and it would work well. However, I didn't get your…"
Mar 11
Juraj Kolesar replied to Shyam Balasubramanian's discussion MAVLink Tutorial for Absolute Dummies (Part –I) in the group ArduCopter User Group
"Hi, Your manual was very helpful for me and my mates in our project beginnings. We are working on kind of GCS using our own map libraries. We implemented already some messages of MAVLink, and for example we are able to show actual GPS position of…"
Mar 10
Shyam Balasubramanian replied to Abbas Mughal's discussion Can i use 10x6 Slowfly props as replacement for 10x4.7 APC in the group ArduCopter User Group
"Oh yes, you can! Performance will be affected but it will work. With same RPM you will get a greater lift as 6" pitch part of the blade will push more air underneath! Note: You may have to readjust the PID pich, roll, yaw rate values.. Shyam"
Mar 9
Ron replied to Shyam Balasubramanian's discussion MAVLink Tutorial for Absolute Dummies (Part –I) in the group ArduCopter User Group
"Thanks, I am trying to learn more! Blue Skies!"
Mar 8
Phoenix replied to Shyam Balasubramanian's discussion MAVLink Tutorial for Absolute Dummies (Part –I) in the group ArduCopter User Group
"Hi Shyam, I din't try it as eventually realized the packet will go via qgroundcontrol and that will be too slow. For what I need is able to send packets(attitude) from on board secondary controller when UAV is in flight. I started manipulating…"
Mar 7
Shyam Balasubramanian replied to Shyam Balasubramanian's discussion MAVLink Tutorial for Absolute Dummies (Part –I) in the group ArduCopter User Group
"Hi Phoenix, Sorry for the late response. I do not know if you have already solved the issue by now. As far as I remember, I had some trouble compiling that piece of code on qgroundcontrol's website, but was eventually able to compile the code…"
Mar 5

Profile Information

About Me:
I am a master student in Embedded Systems at Eindhoven University of Technology, Netherlands. Originally from India, currently residing in Netherlands for almost 3 years now.

I am presently working at Thales Defense Systems.
Please tell us a bit about your UAV interest
I am passionate about UAV and trying my best to make this maze into a craze!!
Hometown:
Netherlands

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Comment Wall (7 comments)

At 5:18pm on August 1, 2013,
MR60
Forrest Frantz
said…

so what are your interests?

At 4:30pm on August 13, 2013, Coen said…

So being in The Netherlands, where do you buy your propellers for the arducopter? Mine are a bit damaged after a rough fall, so I need replacements. It will still fly but it's just not that stable.

At 5:28pm on August 13, 2013, Shyam Balasubramanian said…

Hi Coen,

You can purchase it from amazon.de (search for 'propeller 10x4.7' in the search box). Apart from that you can buy it from hobbyking.com (EU warehouse), www.buildyourowndrone.co.uk (same as Arducopter props) are available there. Ebay.nl or ebay.co.uk are also good options, btw!

You do not need to order it from 3DRobotics, USA (it is way too expensive from there, esp. due to shipping). I never order small parts from them. For screws, other hardware items I order from farnell or hobbytronics.co.uk

Btw, where do you live in NL?

Regards..

At 8:54am on August 23, 2013, Todd Stellanova said…
Hi Shyam, I'm a drone sw developer, currently working on updates to the px4 firmware and qgroundcontrol (among other things).

I wonder if you've come across any academic projects involving precision multirotor landing and takeoff? What I'm looking for is tech that will essentially allow a multirotor to land in a box not much bigger than itself. If you think of anything, let me know. Thanks!
At 9:07am on October 17, 2013, Usman Qayyum said…

Thanks Shyam for your comments. Here are some flow diagrams of (stabilize)/(altitude hold) modes. I have downloaded them earlier but they will give you a good idea about the controller. Hope this will provide you a kick start to understand the basic working of PID controllers. Please find the flow diagrams of the controllers attached!.

At 8:30am on October 19, 2013, Ian said…

Hi Shyam,

The batteries I used are wired as 4S4P. They are panasonic 18650B 3.7V

Li-Ion Batteries.

The total pack voltage is about 14V, and total AMP capacity is about 12A.

So it's wires 4 batteries in series for 3.7V x 4. And then those 4 packs

wired in parallel, for 12A.

                 | -(BATT)+  -(BATT)+  -(BATT)+  -(BATT)+  |

                 | -(BATT)+  -(BATT)+  -(BATT)+  -(BATT)+  |

Negative ---|

|--- Positive +14V 12A

                 | -(BATT)+  -(BATT)+  -(BATT)+  -(BATT)+  |

                 | -(BATT)+  -(BATT)+  -(BATT)+  -(BATT)+  |

Regards,

Ian

At 7:29am on February 25, 2014, serkancaska said…

Hi,

I request your advice about the issues below:

1) I want to import all sensor data of apm board (gps, magnetometer...) to matlab/simulink and send trajectory data(a set of 3 axis coordinates of target nodes in order)
2) I want to get speed transfer function of motors real time in order to get PID parameters via matlab/simulink(i know that we can tune PID parameters via mission planner soft. but i want to learn about this method)

 

Which method is useful for the purposes above:

-mission planner soft-matlab connection via serial port

-apm 2.6 and arduimo ide connection via xbee-usb and then arduino ide and matlab connection via serial port. Thank you.

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