doggie_breath
  • Member for 1 year, 11 months
  • Last seen more than a month ago
  • United States
(not trivial) ROS how to subscribe to multiple topics and publish to another topic within one loop
Accepted answer
3 votes

What you have there should be okay. Basically, each time you construct a subscriber for a new topic, rospy.Subscriber(...), a thread will be started to poll for messages received on that topic. So in ...

View answer
Controller algorithm implementation in ROS/Gazebo
Accepted answer
2 votes

That is a long list of broad questions. Some of the answers depend heavily on application and personal preference. Assuming you're not using ROS2, then you might consider looking at the ros_control ...

View answer
Compute path in absolute frame from sequence of measurements
Accepted answer
1 votes

Assuming frame $0$ is the 'absolute frame', if we let $^j P_i$ be the $i^{th}$ position/orientation expressed in the $j^{th}$ coordinate frame, then what you're asking for is the sequence $$\{(^0P_i)...

View answer
Problem defining rotation matrix
Accepted answer
1 votes

It looks like both frames are attached to the end effector at point P, and are offset by a constant angle $\beta$. So you don't really have to consider the D-H parameters to answer this question - ...

View answer
Are Rospy subscriber callbacks executed sequentially for a single topic?
0 votes

The short answer is yes. In rospy, every subscriber/timer gets its own thread. So for a single topic that means the callback will be executed sequentially. If you are going to be regularly receiving ...

View answer