Kategorie: ‘IGMR’
Active Collision Avoidance in Human-Robot Collaboration
Against the background of human-robot collaboration, the IGMR at RWTH Aachen University is investigating innovative approaches for the safe design of partially automated assembly and production processes.
Commercially available cobots are usually equipped with speed and distance monitoring or power and force limitation according to ISO/TS 15066. In the event of a hazard situation or collision, corresponding robots therefore react by reducing movement speeds or stopping operation completely, which may adversely affect industrial processes.
The presented approach therefore demonstrates how collisions between humans and robots can be actively avoided. The method uses the kinematic redundancy of the KUKA LBR iiwa to avoid obstacles detected by sensors through the internal reconfiguration of the robot kinematics. The trajectory of the end effector is not changed in the process, so that the specified process sequence is maintained. In this context, alternative safety concepts can be developed to enable collision-free automation in the context of human-robot collaboration.
Active collision avoidance with the KUKA LBR iiwa – reference movement without obstacle avoidance:
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Active collision avoidance with the KUKA LBR iiwa – optimized motion course with obstacle avoidance through kinematic reconfiguration:
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Contacts:
TCP and null space impedance for bypassing objects with the KUKA iiwa
In the video two different types of impedance control of the KUKA iiwa are shown: TCP and null space impedance. Furthermore, the bypassing of objects using impedance control has been implemented.
https://youtu.be/VHrV-nh5oTU
First, the two different types of impedance control are demonstrated. Different stiffnesses can be programmed around the individual TCP axes. Two different stiffnesses within a plane are shown in the video. On the other hand, there is null space impedance. In this case, the robot maintains the pose of the TCP and the elbow can be pushed away. As shown in the video, this can be used to bypass an object while maintaining the programmed TCP path.
Project page: NextGeneration
Contacts:
IGMR as a member of the German Rescue Robotics Centre e.V.
This competence centre, which is funded by the German Federal Ministry of Education and Research (BMBF), works together with partners from the public sector, research and users on research into robotics in the fields of firefighting, police work and civil protection. Work on the first section of the test site in Dortmund has recently been completed. The attached videos of the “Deutsches Rettungsrobotikzentrum e.V.” give a first impression.
Szenariofilm:
https://youtu.be/_EnzZrXJwJo
Meilensteintreffen:
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Website:
https://rettungsrobotik.de/
Contact:
Prof. Mathias Hüsing
Haptic feedback system RePlaLink
At IGMR, the haptic feedback system RePlaLink (Reconfigurable Planar Linkage) is being developed. With this system, hand-actuated mechanisms can be haptically simulated and interactively synthesized. Furthermore, users can interactively synthesize these mechanisms. This should allow mechanisms with optimal haptic properties to be developed.
People frequently interact with hand-actuated mechanisms in everyday life, e.g., in car doors, furniture doors, reconfigurable furniture, or fitness equipment. Their haptic properties largely determine the perceived quality of these mechanisms. The RePlaLink (Reconfigurable Planar Linkage) aims to support the design and development of these mechanisms by applying haptic feedback systems based on virtual prototypes. The haptic simulation and synthesis method allows users to directly feel mechanisms’ kinematic and kinetostatic properties while operating the system. In addition, users can interactively modify these properties and receive direct haptic feedback. In the first video, the design of the RePlaLink, consisting of a planar five-link with an additional serial link for the handle, is shown.
https://youtu.be/pemrysX4Cr8
The second video shows haptic simulation and synthesis using a kitchen cabinet door as an example.
https://youtu.be/0AqONOv1R5E
Project page:
https://www.igmr.rwth-aachen.de/index.php/de/gt/gt-replalink
Contact:
Mahshid Pour Ebrahimabadi M.Sc.
Exercise with the Fanuc Education Cell in the module Robotic Systems
As part of the practical exercise of the Robotic Systems module https://www.igmr.rwth-aachen.de/index.php/de/lehrveranstaltungen/rs the Fanuc Education Cell with the Roboguide software is used in our Robotic Lab.
The students learn the basic operation of a robotic cell and implement a logistics scenario by themselves using the Roboguide software. This semester we are also able to maintain the practical exercises remotely. For this purpose, teaching materials have been digitized so that students can simulate the task from their own computers.
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Internet page for the course:
https://www.igmr.rwth-aachen.de/index.php/de/lehrveranstaltungen/rs
Contact:
Markus Schmitz
Teaching the KUKA iiwa by manual guidance
The hand guidance of the collaborative robot KUKA iiwa is well suited for programming spatial points. This is possible both within a program and in the robot’s T1 mode.
https://youtu.be/v7D4yknlxJI
The video shows the manual guidance of the KUKA iiwa within a program. The robot can be guided by hand on the flange when the user presses the gray consent button. After releasing it, the program asks whether the current position is correct and should be saved. Any number of additional positions can then be added. At the end of the program, all stored room points are traversed in the taught sequence.
Contacts:
Robot-Guided Form Scan and Coating
Automatic shape recognition via laser scanner and trajectory planning for coating.
In this project, shapes are detected and their edges are realized by a laser scanner mounted on the end effector of the robot. The collected data is synchronized and filtered, and a suitable trajectory is created for coating the inner surface of the forms. Several variables, such as nozzle speed, spacing and gaps, nozzle size, and outlier for homogeneous coating can be selected during trajectory planning.
The project was carried out in cooperation with International Partners in Glass Research e.V.
Watch this video on YouTube: https://youtu.be/SAHmeuPKeG4
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Contact person:
Camera calibration in SHAREWORK
In the EU project SHAREWORK we develop a framework for industry that allows human-robot collaboration even with heavy industrial robots. We are developing camera-based methods for localizing objects in the workspace and deriving process states from them, which in turn can be further used in task planning algorithms.
For the camera network, we set up and calibrated four Stereolabs ZED stereo cameras in our hall. Random, checkerboard, Aruco, as well as ChAruco patterns were used for the calibration. In the end, we have managed to calibrate the cameras to sub-pixel accuracy. In the video, you can see some data from our calibration sets. Currently the data is being processed and we hope to show more in a few weeks.
Watch this video on YouTube: https://youtu.be/8goCBVKaKtU
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Project page:
https://www.igmr.rwth-aachen.de/index.php/de/rob/rob-sharework
Contact person:
Robot Companion: A mobile helper in case of need
Robot Companion is a framework to implement robot tracking systems in a simple and cost-saving way. For this purpose, IGMR develops methods for tracking with different sensors (laser, radar, camera), agile path planning and actuation.
The current objective of Robot Companion is to provide a robot for emergency rescue. In doing so, the robot will autonomously follow first responders and enable the transport of materials and equipment, as well as the removal of debris and casualties. A first path to this vision was implemented with the basic module. The basic module has methods for tracking with a camera and laser, and enables autonomous tracking of an operator.
The video shows the tracks of the vertical and horizontal trackers, as well as the state of detection (top right). In a tracking test, 100% accuracy was achieved at low speeds.
https://youtu.be/imU8j2zlQrQ
Project website:
https://www.igmr.rwth-aachen.de/index.php/de/rob/rob-comp
Contact:
Next Generation – developing inclusive work with flexible robot solutions
Person sits at a production workplace and is supported by a collaborative robot.
The Next Generation project aims to develop inclusive workplaces with the help of human-robot collaboration (HRC) in order to improve the quality of life.
People with severe and multiple disabilities usually work below their personal cognitive abilities. This causes great dissatisfaction.
For this reason, the project “Next Generation – developing inclusive work with flexible robot solutions” develops workplaces with the aid of human-robot collaboration (HRC).
The project is intended to enable people with disabilities to participate in working life. This can increase the quality of life as well as self-determination and positive personality development.
For tasks from industry, numerous companies from the Cologne area were asked to provide possible sample applications for the conception of the inclusive workplace.
In the process, two activities at Buschhoff Stanztechnik GmbH & Co. KG and at Cölner Hofbräu P. Josef Früh KG were selected. The conception and implementation can now begin. Further up-to-date information is available on the website of the Next Generation project.
Website Next Generation-Project.
Contacts:
