Gender
Male
About
Location
Belle Plaine, MN
About Me:
Mechanical Engineer. Always interested in flight and the engineering challenges.
Please tell us a bit about your UAV interest
Full scale UAV with aspirations to make it an MAV Quadcopter configuration. 2.4 meter rotor diameter. 36 HP with 175 Kg gross wt. Testing single rotor performance, various blade, hub, drive configurations.
Hometown:
BELLE PLAINE
Activity Feed
"That is a great report, but it just waves its hand and completely avoids the issue of how to remove motion acceleration from the accel vector to find the gravity vector."
"Phil, I'm writing an arduino flight controller. I started with code from Joop Brooking (YouTube) and migrated up to the STM32 microcontroller but still using Arduino IDE. Joop's code is based on Euler Angles so I'm now trying to convert my…"
My new project is to create an RC model of the BlackFly PAV. There are many technical challenges to solve and my plan is to first build a 2 motor / 2 elevon VTOL flying wing. (I'm writing my own FC code using the STM32 Blue Pill). I would like to…
"Chris, first time I've been affirmed for being a "quitter", but I'll take it.
Bitter-sweet to let go of this project. I've got 6 lab notebooks full of sketches, calculations and ideas.
But as I said, I learned so much by DOING and those lessons are…"
Bitter-sweet to let go of this project. I've got 6 lab notebooks full of sketches, calculations and ideas.
But as I said, I learned so much by DOING and those lessons are…"
Well, the day finally has come when I am ready to give up on this endeavor. My goal was to build a manned, internal combustion quad copter. I will not say the project was a failure because I learned so much on my journey, but I just see other…
"This is ingenious! Very, very cool."
Test VideoI was finally able to perform a test of the new drive test stand. The previous test stand used a 4-stroke engine and a less rigid test frame. This test stand consists of a 6.5 HP, 2-stroke DuraForce engine coupled to a V-Belt centrifugal…
"Josip,
Yes, my assumptions were that if you just scaled the model up using same materials.
I think you are right that carbon, especially carbon with a light filler material changes the equation dramatically.
The variable pitch quad I am working on…"
Yes, my assumptions were that if you just scaled the model up using same materials.
I think you are right that carbon, especially carbon with a light filler material changes the equation dramatically.
The variable pitch quad I am working on…"
"I wondered the same thing. Here are my thoughts..
Multicopter Scalability"
Multicopter Scalability"
"So I was thinking...
If I use a triple redundant system, it would be feasible to allow one of the 3 controllers to implement integral control.
The potential side effects could be:
This controllers servo's would do more work. With proper limiting…"
If I use a triple redundant system, it would be feasible to allow one of the 3 controllers to implement integral control.
The potential side effects could be:
This controllers servo's would do more work. With proper limiting…"
"Chris, Yes, if the broken servo free-wheels, I'm SOL.
Regarding pitch control range, I'm planning to only use the middle 2/3 of the servo's range during normal operation so that extra range on the servo is available to compensate for a…"
Regarding pitch control range, I'm planning to only use the middle 2/3 of the servo's range during normal operation so that extra range on the servo is available to compensate for a…"
"I posted a comment on Axel Borg's (AmazingDIYProjects) youtube video wondering how he handled integral control with 5 independent controllers, and....HE ANSWERED! Which is very uncharacteristic for him. He indicated that the flight controllers…"
"Armin, Yes this is a bit tricky. I was wrong before thinking that PID on the roll/pitch rate control would avoid divergence between controllers. This will be a problem if I use integral control. I wonder how the guy in Amazing DIY Projects handled…"
"Armin,
The algorithm I'm playing with has a roll/pitch angle proportional controller cascaded to a roll/pitch rate PID controller.
If I'm thinking correctly, the separate controllers shouldn't "wind up" their integral term, because the PID loop is…"
The algorithm I'm playing with has a roll/pitch angle proportional controller cascaded to a roll/pitch rate PID controller.
If I'm thinking correctly, the separate controllers shouldn't "wind up" their integral term, because the PID loop is…"
"Armin, I hear what you are saying, and....this project has already gotten more complex than I had originally hoped.
So, my approach at this point is to let the healthy systems compensate for the unhealthy ones. I acknowledge that during a failure,…"
So, my approach at this point is to let the healthy systems compensate for the unhealthy ones. I acknowledge that during a failure,…"
I continue to develop my "full scale" gas powered, variable pitch quad-copter.After watching the video below at Amazing DIY ProjectsI realized (more vividly) how vulnerable a quad is to any fault in the control system.Then I saw his video here…
