Schlagwort: ‘Parameteridentifikation’
Optimal Control to Suppress Vibrations
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In pick-and-place tasks, which are often implemented with delta robots in industrial practice, short cycle times are desired. These lead to high accelerations of the robot and thus to high inertial forces, which cause the frame to vibrate. The frame vibrations reduce the performance and positioning accuracy of the robot and lead to material fatigue. To reduce frame vibrations, we have developed an optimal control approach that calculates vibration-reducing trajectories. To reduce vibrations, the free frame vibration is suppressed at the end of the trajectory. The chosen approach optimizes the trajectory holistically, i.e., both the geometric path and the motion law along the path are optimized. The optimization uses a multibody simulation model that was constructed with the aid of experimental system identification. Application- and robot-specific boundary conditions can be taken into account in the calculation of vibration-reducing trajectories.
contact:
Nils Brückmann
Christian Mirz
Preprint of the corresponding paper can be found here.
Further information on the Delta robot can be found here.
New research topic at IGMR: Pick & Toss
Today’s production plants would be unthinkable without robotic pick & place processes. Handling objects are picked by the robot and placed at the target position with the desired target orientation. An innovative possibility to significantly increase the workspace of a robot and to reduce process times is the extension of this process by the targeted throwing of handling objects. Possible areas of application are the sorting of products that are not damaged during the throwing process (e.g. screws or nuts) or whose damage is of secondary relevance (e.g. sorting out defective products, separating materials in recycling plants).
Our goal is to describe the robotic pick & toss process using a combination of classical analytical and machine learning models to make the innovative process industrially viable.
Contacts:
Nils Brückmann
Johannes Bolk
Cross section group: Application Dynamics
The Application Dynamics team is made up of members from all IGMR research areas. This allows the skills in vibration analysis and machine dynamics to be optimally combined with the expertise and many years of experience in power transmission and robotics. This fusion of the Institute’s internal research priorities enables solutions to be found to problems that require both technical knowledge of dynamics and application-specific expertise. This cross section of knowledge is applied, for example, in the form of a needs-based investigation and exploitation of the dynamic effects of a system. The focus is on applications in robotics and gearing, but also covers all types of mechanical motion systems. The current research horizon ranges from kinematic redundancy and high-speed trajectories to the use of neural networks to extend the workspace through innovative object manipulation.
Contact: Johannes Bolk
IGMR Seminar 01. Februar 2021 14:30 Uhr: Veronika Zumpe, Kuka AG
Wir begrüßen Frau Veronika Zumpe von Kuka zum IGMR Seminar. Auch dieser Veranstaltung wird weiterhin virtuell durchgeführt:
How to design a robot. A perspective from corporate research.
For specific handling tasks, there is a need for the development of new robotic systems. It is necessary to develop and design the system with respect to the given task, environment and other constraints. The design process includes finding a suitable kinematic, developing drive concepts for the robot axes, designing the structural parts and finalizing the robot design. For applications with human robot collaboration, more aspects like lightweight design play a significant role and thus should be taken into account. This talk gives a rough overview of the design process of a robot from my corporate research perspective.
Montag, 01. Februar 2021 14:30 Uhr in Zoom
https://rwth.zoom.us/j/98454895570?pwd=NkpiSWkyaTJtdWlralJrSUtnMDdDZz09
Meeting-ID: 984 5489 5570
Kenncode: 186393
Die Datenschutzhinweise zur Nutzung von Zoom und eine Handreichung für Teilnehmer (Studierende) können von den Seiten des CLS der RWTH Aachen University heruntergeladen werden.
Die Veranstaltungen im Wintersemester 2020/2021 werden in Zusammenarbeit mit dem VDI-GPP-Arbeitskreis des Bezirksvereins Aachen durchgeführt.
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