Moda's profile - activity

I'm using ubuntu 12.04, ros hydro, and my computer seems to be too slow sometimes, making ros crashes. So I'm wondering if I should use a cloud services. Did somebody already use the Amazone EC2? If yes, did it work fine? Thank you

I have a map (the .png file and the .yaml file) and I want to create a .world file, how to do this? Thank you

When I launch my move_base.launch, ( http://wiki.ros.org/navigation/Tutori... ) , I got this error :

Waiting on transform from /base_link to /map to become available before running costmap, tf error: 
[ WARN] [1406541885.908819812]: No laser scan received (and thus no pose updates have been published) for 1406541885.908702 seconds.  Verify that data is being published on the /scan topic.

This is my frames.pdf file

This is the rqt_graph :

I want to code a complete coverage path planner. So first I got a map, and I want to know how can I divide my map in little square cell and in the middle of each cell put a point. With visualization_msg, the point can just be seen by us, and not by the robot. What I want is that this point can be seen by it. So then I will be able to tell to my robot to get throw all the mark. Thank you

Thanks a lot, I'm gonna try this solution

Hi,

I'm trying to use a targus amp13eu has a way to teleoperate my robot. Has anyone already done that or would know how to do?

Thanks a lot for your help!

When I launch my move_base.launch, ( http://wiki.ros.org/navigation/Tutori... ) , I got this error :

Trajectory Rollout planner initialized with param meter_scoring not set. Set it to true to make your settins robust against changes of costmap resolution

This is my base_local_planner.yaml file

TrajectoryPlannerROS:
  max_vel_x: 0.01 #0.45
  min_vel_x: 0.005
  max_rotational_vel: 0.02 #1.0
  min_in_place_rotational_vel: 0.002 #0.4

  acc_lim_th: 0.01 #0.06 #3.2
  acc_lim_x: 0.01 #0.05 #2.5
  acc_lim_y: 0.5 #2.5

  holonomic_robot: false
  dwa: true

I have a differential robot, with a laser Hokuyo, and I want my robot to cover the whole part of a map. I saw that there is some algorithms but I can't find a code. So have someone already implement such algorithms?

Thank you

I succed finally to launch my move_base.launch file. And when with rviz I tried to tell where the robot is in the map, with the 2d Pose Estime, i got this message :

Failed to transform initial pose in time (Lookup would require extrapolation into the future.  Requested time 1407222627.317546291 but the latest data is at time 1407222627.301636934, when looking up transform from frame [map] to frame [base_link])

I think that there is a link with my previous problem http://answers.ros.org/question/18796...

This is my view_frames

My local costmap is :

local_costmap:
  global_frame: /odom
  robot_base_frame: base_link
  update_frequency: 5.0
  publish_frequency: 2.0
  static_map: false
  rolling_window: true
  width: 6.0
  height: 6.0
  resolution: 0.05

My global costmap is global_costmap: global_frame: /map robot_base_frame: base_link update_frequency: 5.0 static_map: true

The link beetween map and /odom is done in the move_base.launch file :

  <node pkg="tf" type="static_transform_publisher" name="odom_map_broadcaster" args="0 0 0 0 0 0 /map /odom 100" />

When I launched roswtf i got this error

Loaded plugin tf.tfwtf
No package or stack in context
================================================================================
Static checks summary:

No errors or warnings
================================================================================
Beginning tests of your ROS graph. These may take awhile...
analyzing graph...
... done analyzing graph
running graph rules...
... done running graph rules
running tf checks, this will take a second...
... tf checks complete

Online checks summary:

Found 3 warning(s).
Warnings are things that may be just fine, but are sometimes at fault

WARNING The following node subscriptions are unconnected:
 * /amcl:
   * /tf_static
   * /clock
   * /initialpose
   * /scan
 * /robot_state_publisher:
   * /joint_states
 * /rpid_velocity:
   * /rwheel
 * /diff_tf:
   * /lwheel
   * /rwheel
 * /map_server:
   * /clock
 * /odom_map_broadcaster:
   * /clock
 * /move_base:
   * /move_base_simple/goal
   * /tf_static
   * /clock
 * /lpid_velocity:
   * /lwheel

WARNING These nodes have died:
 * mark2_arduino-2

WARNING Received out-of-date/future transforms:
 * receiving transform from [/robot_state_publisher] that differed from ROS time by 1407396264.96s
 * receiving transform from [/diff_tf] that differed from ROS time by 1407396264.45s


Found 1 error(s).

Update The new tf view_frames

did you solve the issue?

Did some solve the issue?