Trajektorien des menschlichen Aufstehens für die Entwicklung eines kooperativen Assistenzsystems

What is in the workspace

This workspace contains five simulations of two robots, the "simple robot" and the KUKA robot, following predefined trajectories. The packages are named according to the degrees of freedom (DoF) required by the "simple robot" to perform each motion: one simulation for 1 DoF, two for 2 DoF, and two for 3 DoF. Each movement can be executed with one of two velocity profiles—constant or trapezoidal.

Getting started

Required setup : Ubuntu 22.04 LTS

1. Install ros2 packages. The current development is based of ros2 humble. Installation steps are described here.

2. Source your ros2 environment:

   source /opt/ros/humble/setup.bash

   NOTE: The ros2 environment needs to be sources in every used terminal. If only one distribution of ros2 is used, it can be added to the ~/.bashrc file.

3. Install colcon and its extensions :

   sudo apt install python3-colcon-common-extensions

4. Pull relevant packages, install dependencies, compile, and source the workspace by using:

   git clone https://gitlab.kit.edu/uquzq/trajektorien-des-menschlichen-aufstehens-fuer-die-entwicklung-eines-kooperativen-assistenzsystems.git
   rosdep install --ignore-src --from-paths . -y -r
   colcon build --cmake-args -DCMAKE_BUILD_TYPE=Release --symlink-install
   source install/setup.bash

Launching a simulation

1. In the first tab navigate to the launch folder of the KUKA iiwa robot:

   cd ~/trajektorien-des-menschlichen-aufstehens-fuer-die-entwicklung-eines-kooperativen-assistenzsystems/ros2_ws/src/iiwa/iiwa_bringup/launch

2. Launch the RViz simulation with the KUKA iiwa robot:

   ros2 launch iiwa.launch.py

3. In a separate tab navigate to the workspace:

   cd ~/trajektorien-des-menschlichen-aufstehens-fuer-die-entwicklung-eines-kooperativen-assistenzsystems/ros2_ws/

4. And launch one of the simulations with the simple robot (ex: 1 degree of freedom):

   ros2 launch simple_robot_1dof simple_robot_rviz_simulation_1dof_launch.py

This will open a separate RViz window with a "simple robot" that performs a repeating motion. In this simulation, the KUKA robot will execute the motion only once, timed to align with the second cycle of the simple robot’s movement.

Parameters

There are parameters that can be defined during the launching, that define the velocity profile and the exact movement:

• constant_speed - Specifies which speed profile should be executed. Set to true for a constant velocity profile, or false for a trapezoidal profile.
• simultaneous - Determines whether the two movements are performed simultaneously (applicable only for 2 and 3 DoF movements). Set to true for simultaneous movement, or false for sequential movement.
• velocity_constant - Sets the velocity for the constant velocity profile (float).
• acceleration, decelaration, max_velocity - Define the acceleration, deceleration, and maximum velocity values for the trapezoidal velocity profile (float).