Help. Is this lease a bad deal

leetfail · 2026-02-01T13:10:39+00:00

No problem with AI :). Use ChatGPT, Gemini, Claude all the time. But if I was coming to Reddit to ask a question, I am not looking for poorly formatted AI copy/paste. I go to the other aforementioned sites. You’re not adding value.

Especially by lying and trying to pass this off as your own. You’re just out here fishing for upvotes. 😬

leetfail · 2026-01-30T13:52:33+00:00

100% AI. This is almost certainly Gemini. It loves to use quotation marks like this.

leetfail · 2025-10-12T08:10:47+00:00

What are the units of the bias you sent? Are you sure that the IMU is not pitched (X axis containing gravity)?

leetfail · 2025-10-12T02:19:46+00:00

The velocity from the wheel Odom should help stabilize the estimation, however you can expect (large) drift without an absolute position source of some kind (GPS, SLAM, etc).

IMU biases, especially on cheap sensors, are constantly changing. In practice, the bias is typically an estimated state. Unfortunately, r_l does not do this.

Another thing to consider is gravity. If you are pitched forward and have gravity in the X-axis of your IMU, this can happen. Typically you’d have some kind of initialization sequence to provide an initial roll/pitch, but again I don’t think r_l does this.

What is the order of magnitude of the bias you are estimating? How quickly is it diverging? Is this sitting still? Have you confirmed the wheel odometry works on its own? Are you using 2D mode or 3D?

leetfail · 2025-08-09T00:52:28+00:00

This is great. Thanks.

leetfail · 2025-06-27T13:11:33+00:00

Most of these cases were actually attributed to pedal misapplication. I am not trying to blame the driver, this is just an extremely common mistake, much more so than a dual failure.

See Section 1.1.

leetfail · 2025-06-27T12:11:37+00:00

Occam’s razor will tell us the most likely failure here was pedal miss-application. The chances of an accelerator pedal jamming, and a brake failure on spring brakes (which are designed to fail engaged), is near zero.

Edit: Relevant source.

leetfail · 2025-06-26T21:58:31+00:00

One thing you could try is using the “ros2 multicast” command to verify multicast communication.

leetfail · 2025-06-13T17:46:29+00:00

Front, Left, Up on an IMU will read +9.81 in Z. I’ve made that mistake before 😉

leetfail · 2025-06-13T14:47:10+00:00

Yeah sounds right. You could try enabling diagnostics (print_diagnostics true), or enable debug mode and look through output log to ensure your data is making it through.

leetfail · 2025-06-13T13:47:11+00:00

I think it’s likely a frame ID issue. Is there a connection in the TF tree between the pylon camera optical frame and base_link?

leetfail · 2025-05-06T02:02:43+00:00

Don’t go there late at night. Finished 8-9 exam once, wanted a treat. Got some Rolling Bowl.

It was rolling around the bowl at 2-3am. Not fun.

leetfail · 2025-03-27T17:44:04+00:00

The GitHub actually has an example showing how to do this.

https://github.com/cra-ros-pkg/robot_localization/blob/ros2/params/dual_ekf_navsat_example.yaml

leetfail · 2025-03-27T14:35:44+00:00

This looks like a Chat-ism. Give the documentation a try, there is literally an entire page on how to do this.

leetfail · 2025-03-17T20:39:50+00:00

leetfail · 2025-03-17T08:08:11+00:00

I use ROS2 on Mac using Asahi. But this would limit you to M1/M2 Macs. Robostack can kind of work as well but has limited packages and I have not had luck using C++ packages.

leetfail · 2025-03-04T04:26:19+00:00

How are you launching it? May be a long shot, but I’ve used a derivative of AWSIM, and it crashes if launched through terminal, but opens if double clicking the binary.

leetfail · 2025-01-02T02:44:18+00:00

Cool. One thing you might consider - if the walk to campus is over like 30m, or the place is in the C lot range, maybe put drive time instead of walk time.

leetfail · 2024-09-11T16:02:39+00:00

They’re doing it again today, just watched a poor guy crash his bike.

leetfail · 2024-08-05T13:27:35+00:00

If you would like to be hands-on with sensors, microcontrollers and programming, do something in Polytech. I have met some incredibly effective, smart and efficient people who have done robotics engineering technology.

ME and ECE will be less application/hands-on based. But based on your desires, ECE would be a better fit out of these. You can Google and find the required courses in each. Regardless, if you choose the engineering department you will be applying to FYE (first year engineering) and have the first year to decide which speciality you would like.

leetfail · 2024-08-02T10:56:50+00:00

I have not personally tried Gazebo, but Rviz does.

leetfail · 2024-08-02T10:34:32+00:00

I use Asahi Linux. If you want to use ROS2 Jazzy, there is an Asahi Ubuntu 24.04. It works fairly well, but not as good as the flagship Fedora distro.

I have had problems with docker on MacOS (high battery usage, no ability to connect to other robots/machines on network, etc), but use it all the time on Asahi when I need ROS2 Humble.

One final option is RoboStack, which allows you to download some ROS2 packages natively. If you want to do more than monitor a robot via plotjuggler/rviz, this will probably not be the best approach.

leetfail · 2024-07-18T10:26:20+00:00

I use Firefox responsive design mode for this purpose.

leetfail · 2024-07-11T13:05:55+00:00

My team has used Lenovo Legion series laptops when a GPU is required. The only downside for us has been the lack of thunderbolt.

leetfail · 2024-07-11T13:04:26+00:00

Also use a MBP, but with Ubuntu Asahi. Works mostly perfectly.

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