Gerry's profile - activity

Hi,

Just a quick question. I found that the obstacles marked by ultrasound (plugin RangeSensorLayer) cannot be cleared by Laser Scan on costmap. But these obstacles can be cleared by ultrasound itself. On the other side, Laser Scan marked obstacles cannot be cleared by ultrasound either according to my experiment. I use ROS kinetic. Is my observation correct or there is something wrong in my configuration of experiment? Any insight would be highly appreciated.

Best regards, Gerry

Path following and obstacle avoidance controller in ROS Hi, I'm trying to find some path following and obstacle avoidan

I guess you can publish string "play"/"stop" via message std_msgs/String. Then you create another node listening to this

I guess you directly run the command [sudo apt-get install ros-distro-ros-tutorials]. Please replace distro with the ROS

OK, after some study and experiments, I guess I find the reason. The obstacle marked/cleared by ultrasound is performed

Range sensor layer marked obstacles cannot be cleared by LaserScan Hi, Just a quick question. I found that the obstacle

In our setup, all of the ROS nodes are running on the same computer. And I have checked that when navigation is launched

In out setup, all of the ROS nodes are running on the same computer. And I have checked that when navigation is launched

I tried to increase the frequency to 20 Hz, but the error is still reported without decreasing the time from timestamp i

Range sensor layer can't transform problem Hi, Basically, I have already setup ROS navigation stack. Recently, ultrasou

Range sensor layer can't transform problem Hi, Basically, I have already setup ROS navigation stack. Recently, ultrasou

about 10 Hz

Range sensor layer can't transform problem Hi, Basically, I have already setup ROS navigation stack. Recently, ultrasou

Hi, thanks for your comments again. Similar to your suggestion, our plan is to compare the surrounding environment prese

Hi, Thanks for your reply. The problem is that there are other obstacles in our environment except slopes. These obstacl

ROS Navigate through slope Basically, we use ROS Navigation Stack. According to those materials we have found so far, it

I'm a newbie to ROS Navigation and I will try to elaborate my problem as detailed as possible. Basically, I'd like to implement navigation stack with RGBD camera. To this end, I use maplab (https://github.com/ethz-asl/maplab) with its localization mode enabled as my localization system(a global map is created beforehand with maplab to be used in navigation). I have followed Navigation tutorials (http://wiki.ros.org/navigation/Tutori...) to create related tfs and publish necessary topics. The application is launched without any error and rviz is showing the 2D global map correctly. Then, I tried to click the button '2D Pose Estimate' in rviz to set robot's initial pose. Now the problem comes such that there is no effect shown in rviz, the robot still stays at the same place. I checked the topic /initialpose which is published by rviz. Everytime I click the button '2D Pose Estimate' and drag it to some place on the map, there is a message published from this topic that has position and orientation information. Why rviz failed to set initial pose of the robot?

I have some doubt about the subscribers of the topic /initialpose. In my navigation setup, actually, there is no subscriber of topic /initialpose currently. But I find out that AMCL is the subscriber of topic /initialpose in case laser scan is used. In my case, maplab is the localization system. Then, whether do I need to do some work to make maplab subscribe to topic /initialpose? If yes, how the localization system should use the subscribed topic /initialpose in general?

I'm really puzzled by this problem and any help is highly appreciated. Thanks in advance.

Best regards, Gerry

OK, I managed to get some comments from the author of maplab. No, this capability is not implemented. The author, howeve

rviz cannot set initial pose with button 2D Pose Estimate I'm a newbie to ROS Navigation and I will try to elaborate my