About

Gender

Male


Location

Hood River, OR


About Me:

KalmanFilters-R-Us


Please tell us a bit about your UAV interest

Guidance, navigation, and control


Hometown:

Hood River


Activity Feed

MariusN commented on Lorenz Meier's blog post Earth rotation rate contest (temperature compensation of sensors)
"I'm curious how you determined that gyrocompassing is possible with today's MEMS sensors. The ST L3GD20H gyro, which is relatively new, has a published sensitivity of 8.75 mdps/digit at its lowest measurement range setting. This translates to 31.5…"
Dec 23, 2013
MariusN commented on William Premerlani's blog post Magnetometer alignment
"Bill, you might be interested to read the paper "Magnetometer Autocalibration Leveraging Measurement Locus Constraints" by Prof. Egziabher in the AIAA Journal of Aircraft, Vol.44, No.4. The algorithm he proposes solves for hard iron bias, scale…"
Oct 18, 2011
MariusN commented on William Premerlani's blog post Magnetometer alignment
"In theory you only need 3 points, but in practice, due to measurement noise, it would be preferable to have an overdetermined system that you can then solve by least squares or by a recursive algorithm such as a Kalman filter or the fixed-gain…"
Oct 18, 2011
MariusN commented on ionut's blog post New record was set for the absolute duration of an unmanned autonomous vehicle (UAV) flight
"Any idea what is the role of the white triangular fin on the rear part of the combined Pitot/alpha/beta probe ?"
Dec 25, 2010
MariusN commented on Curtiss Chiang's photo
"Gary:
A static margin of 10 to 30% MAC is reasonable. The more stable the aircraft is statically, the more control deflection is needed to maneuver or change flight condition. You can't really compare, in terms of mass distribution, the electric RC…"
May 23, 2010
MariusN commented on Curtiss Chiang's photo
"Judging based only on this picture, it seems this airplane has a serious design issue. A canard configuration with rear-swept wing results in a neutral point location too far behind the CG, making the aircraft too statically-stable in pitch. This…"
May 23, 2010
MariusN replied to Overwatch's discussion GPS module for high altitude unmanned balloon
"The discontinued chip u-Blox TIM-LP works for sure. I've flown it up to 100,000. No idea about the newer u-Blox products."
Apr 8, 2010
MariusN commented on Harald Molle's blog post ardupilot goes into the water Part 7
"Another way to handle the integrator windup is to design a nested-loop control law: your inner loop drives the rudder with integral feedback of turn rate error, and your outer loop generates the turn rate command by proportional feedback of heading…"
Apr 5, 2010
MariusN commented on Morli's blog post Yet Another Potential Platform for nitro powered Cheap UAV
"I recall the full-size version of this aircraft requires a significant amount of rudder trim (5 to 10 deg.) to fly straight, due to the prop wash on the vertical tail. Therefore, you will probably need to set some throttle-to-rudder mixing if you…"
Feb 11, 2010