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1500 questions
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4 answers

differential drive PID controller

I have a differential drive robot that works fine (good PD parameters) driving at say 1 m/s. Now, if it speeds up (to 1.2 m/s) it starts wobbling again. What would be a good strategy for a controller that is able to cope with the whole speed range…
tired_of_nitpickers
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Spatial tracking between two UAVs

I have two Unmanned Aerial Vehicles (planes) which work well. They can fly to various waypoints automatically using GPS. Now I would like them to fly together in formation. I would like them to fly side-by-side fairly close. This is too close to…
Rocketmagnet
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An architecture for testing autonomous flight and sensors

I'm designing a simple autopilot software on top of Ardupilot, my goal is to possibly interface an Raspi on top of ArduPilot Mega (APM). I am stuck on setting up a simulation environment using either V-Rep or Gazebo. The quadcopter will have basic…
Bonk
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How to explain bandwidth of a measurement to a noob?

I am working on a system which is measuring a force. The specification is to have a 500Hz bandwidth on the measurement. Now I was trying to explain this 500Hz bandwith to my mom and I could not really explain it easily. What is the most easy way to…
2pietjuh2
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Effectiveness of a Mobile Robot In Relation To Mass

Do mobile and/or autonomous robots become more or less effective the bigger they get? For example, a bigger robot has bigger batteries, and thus bigger motors, whereas a smaller robot has the exact opposite, making it need less energy, but also have…
OneChillDude
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Cyclonedds: Can see topic when using ros2 topic list, but only can echo some of the topics over the wireless network

I have two PC in my setup. PC A [ROS Foxy] is connected to the router via Ethernet while PC B [ROS Humble] is connected to the router via WIFI. When I run ros2 topic list on PC B, I can see all the topics from PC A however no all the topic can be…
Chun Jye Beh
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SLAM for Autonomous car

I am working on SLAM for autonomous car like vehicles with 2D lasers and IMU (deriving odometry). I would like to know how efficient is using the existing SLAM algorithms (for example: gmapping in ROS based on rao blackwellized particle…
nayab
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Benefits of the Number of Propellers

I am planning on creating a quad-copter with my Arduino that I have. I have created a few land robots before but no aerial vehicles, so this is all new to me. I was looking on the Internet for different models, and I see that most robots have 4…
Justin Chang
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Why do we need to know the translation between Camera and IMU?

In Visual Inertial Odometry, assuming the camera and the IMU are attached to the same rigid body, why isn't it enough to know just the relative rotation between the camera and the IMU? Why do we need to know the relative translation too? Imagine a…
jordi
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Network Issues: ROS2 Topic visibility dependency to Network Interfaces

My colleagues and I had the issue that sometime ros2 topics were not shown in “ros2 topic list” or that we could not “ros2 topic echo” the data. After further investigation, we concluded that the problem occurred when we connected/disconnected new…
Renzo
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Generic name for two-motor wheeled/tracked robots?

Is there a generic name for the category of robots that move using two opposing wheels or tank-like treads?
Mark Harrison
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Kinect for Xbox: SDK selection

My application is basically about sound source localization and visual servoing. I selected Kinect as the main hardware. I already know the basic differences between Kinect for Windows and Kinect for Xbox. I cannot access to windows version from my…
baci
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Cons and pros of wireless technologies for rescue robot

robotics enthusiasts! I'm a member of a team which has to develop a mobile rescue robot to cooperate with firemen (e.g. on earthquake sites). The problem we have is connection of a commander post with the robot. The robot has to enter buildings, so…
Martin Pecka
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Overcorrecting Kalman Filter

I'm trying to get an extended Kalman Filter to work. My System Model is: $ x = \begin{bmatrix} lat \\ long \\ \theta \end{bmatrix}$ where lat and long are latitude and longitude (in degree) and $\theta$ is the current orientation of my vehicle…
Niklas
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F/OSS Optical Object Avoidance

I am beginning work on a larger scale, 250-350 lbs wheeled robot and looking to use both optical and other means of object avoidance. I am concerned with a robot this large causing issues with running into things, including people as it has a top…
Jeff Records
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