About

Location

Zurich


Please tell us a bit about your UAV interest

http://www.inf.ethz.ch/personal/lomeier/


Hometown:

Zurich


Activity Feed

Lorenz Meier commented on Maxx_UAV's blog post New ArduPilot plugin for Gazebo
"Fantastic work! I'm maintaining the official Dronecode Gazebo plugin. We're currently working hard to bring more coordination and rigor to our simulation ecosystem and it would be great to discuss how we can re-integrate your work into upstream…"
Jan 2, 2016
Lorenz Meier commented on PX4's blog post PX4 - Call for VTOL test pilots
"@Pedro sure you can."
Dec 19, 2014
Lorenz Meier commented on PX4's blog post PX4 - Call for VTOL test pilots
"Yes, the motors are fixed. Its a very lightweight and durable that way."
Dec 18, 2014
Lorenz Meier commented on PX4's blog post PX4 - Call for VTOL test pilots
"It can almost certainly carry a small p&s. And the good thing with wings is: You can get them in all sizes and shapes, and a slightly larger one can definitely carry one easily."
Dec 17, 2014
Lorenz Meier commented on PX4's blog post PX4 - Call for VTOL test pilots
"Hi Brandon,
Many people have shown the control approach, some I'm sure there are tons of videos out there. The current controller is nothing special compared to what is used in academia, but more advanced than what is used often in the community in…"
Dec 17, 2014
Lorenz Meier commented on Joseph Aletky's blog post Out of the Black: SLT VTOL UAV
"Hi Joe,
We're flying a quad+wing tail sitter at ETH - if you're interested in flight code doing both fixed wing and multicopter control, you could check this branch out:
https://github.com/PX4/Firmware/pull/1375

Feel free to join the dev mailing…"
Nov 2, 2014
Lorenz Meier commented on Lorenz Meier's blog post ARM announces new Cortex M7 core, uses PX4 and 3DR vehicles as use case
"Arducopter runs on top of the PX4 middleware, which would be the place that needs adoption. However, ST's press release for the F7 suggests it should be a minor update: http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1858?icmp=ss185..."
Sep 24, 2014
Lorenz Meier commented on Lorenz Meier's blog post ARM announces new Cortex M7 core, uses PX4 and 3DR vehicles as use case
"Bill,
I'm fully aware of the full/small system layout and there are many, many more examples than Symbian OS. There are also POSIX compliant RTOS which could guarantee timing and still offer a Linux-style API. But they both have their limitations.…"
Sep 24, 2014
Lorenz Meier posted a blog post
Cross-post from my original G+ plus post, based on a The Register article: ARM just announced a new embedded core, the Cortex M7 with up to 400 MHz clock speed. The CPU is in general faster and has an improved pipeline, the real game changer four…
Sep 24, 2014
Lorenz Meier replied to xoltri's discussion Pixhawk causing motor sync issues.
"@Papi78: Why would you assume that all the other boards are outputting 5V levels? Have you measured them all? It would be interesting data, so please share. Here is the schematic of the CC (the CC3D doesn't seem to have any shifter onboard, too, as…"
Sep 2, 2014
Lorenz Meier replied to xoltri's discussion Pixhawk causing motor sync issues.
"Hi Kendall,
There are two main reasons we opted for 3.3V: The first reason being that in the complete population of receivers we tested (Spektrum, Futaba, FrSky) the output voltage was 3.0 to 3.3V. So essentially the de-facto standard is 3.3V (also…"
Sep 2, 2014
Lorenz Meier replied to xoltri's discussion Pixhawk causing motor sync issues.
"While I perfectly agree this is a difference, its not the only one, and we shouldn't conclude this is *the* relevant one (as explained in my last post). Pixhawk's output *changes* at 400 Hz, while APM maxes out at 200 Hz changes (APM has a 490 Hz…"
Sep 2, 2014
Lorenz Meier replied to xoltri's discussion Pixhawk causing motor sync issues.
"To consider these scope shots as data, they need to show the complete picture. The claim of 5V levels being necessary all builds on the assumption that this would be the standard / required - if we make that assumption, we have to prove this first.…"
Sep 2, 2014
Lorenz Meier replied to xoltri's discussion Pixhawk causing motor sync issues.
"Kendall,
May I suggest you provide scope shots of your preferred Futaba, Spektrum or FrSky receiver (assuming a model released in the last ~3 years) as well?
Thanks!
-Lorenz"
Sep 1, 2014
Lorenz Meier commented on Roberto Navoni's blog post VR Brain 5 (PRO) vs VR Micro Brain vs Pixhawk
"@Roberto: I think comparison matrices are great for users, but also quite delicate if not done by a 3rd party, so please allow a few comments: Its quite interesting how you compare weight (with and without enclosure, or like some would say, apples…"
Aug 17, 2014
Lorenz Meier commented on PX4's blog post Adding optical flow to the mix
"@Vega: Some interesting claims you're making there. What would be your comment about the light sensitivity of these (anonymous) products compared to an automotive machine vision sensor like the MT9V034 used in this flow sensor?"
Jul 15, 2014
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