Jetson RACECAR Build – Software Install 2

In part one of the RACECAR software install, we set the stage. In this article, we install the RACECAR packages. Looky here:

Background

One of the packages that is installed is for Ackerman Steering. This is the type of steering geometry that is used in most automobiles. Angled steering arms allow the wheel angles to change at a different rate. In the old horse buggy days, parallel steering arms were used on which when the wheels turned, both turned at the same angle. As you know, the wheel closest to a turn follows a smaller radius circle than the outside wheel. In other words, the outside wheel travels further than the inner wheel, so it is intuitive that the angle of the outer wheel should be different than the inner one. Angled steering arms provide a mechanical solution to the problem. The R/C car used in the Jetson RACECAR has this type of steering mechanism connected to the steering servo.

Installation

This is a straightforward installation which installs the ROS racecar package, along with packages for nodes controlling the VESC (Vedder Electronic Speed Controller) and an Ackerman Steering node. There is also a Stereolabs ZED camera package installed, and support for some other sensors.

All of these packages come straight from the MIT RACECAR repository. The install script is in the JetsonHacks account on Github.

$ git clone https://github.com/jetsonhacks/installRACECAR.git
$ cd installRACECAR
$ ./installRACECAR.sh

Conclusion

Most of the needed software is now installed on the Jetson RACECAR. The one remaining issue before we can get the vehicle rolling is the VESC, which needs firmware installation and configuration. This is done using a software tool called ‘bldc-tool’, and is the subject of the next article. Stay tuned!

Setting up the VESC

8 Comments

  1. Hi Jim

    I noticed that you have the Scanse.io LIDAR sweep, I do too 🙂 really good, however I would like to know if you have the same issue as me.

    I had install the sweep node and alos the point to cloud laser scan node (ros-kinetic-pointcloud-to-laserscan) but I can’t see any data comming our from the sensor via rostopic echo, not even when running the visualization with rviz nodes.

    have you experimented this issue?

    I have a TX1 BTW 🙂

    thanks for any guidance

  2. Hi.
    I just get below commend during ./installRACECAR.sh , what should I do?

    Catkin Make
    ./installRACECAR.sh: line 39: catkin_make: command not found
    ./installRACECAR.sh: line 40: catkin_make: command not found

    thanks.

  3. I just get below log, when I installed ROS.
    ubuntu@tegra-ubuntu:~/installROSTX1$ ./setupCatkinWorkspace.sh jetsonbot
    ./setupCatkinWorkspace.sh: line 5: /opt/ros/kinetic/setup.bash: No such file or directory
    Creating Catkin Workspace: /home/ubuntu/jetsonbot
    /home/ubuntu/jetsonbot/src
    ./setupCatkinWorkspace.sh: line 20: catkin_init_workspace: command not found
    ./setupCatkinWorkspace.sh: line 22: catkin_make: command not found

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