René van de Molengraft

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— The design of a CACC system and corresponding experiments are presented. The design targets string stable system behavior, which is assessed using a frequency-domain-based approach. Following this approach, it is shown that the available wireless information enables small inter-vehicle distances, while maintaining string stable behavior. The theoretical(More)
Atomic Force Microscopes (AFMs) are widely used for the investigation of samples at the nanometer scale. The metrological AFM used in this work uses a 3 degrees-of-freedom (DOFs) stage, driven by piezo-stack actuators, for sample manipulation in combination with a fixed cantilever. The piezo-stack actuators suffer from hysteresis, which acts as a nonlinear(More)
SUMMARY The tracking performance of systems that perform repetitive tasks can be significantly improved using iterative learning control (ILC). During successive iterations, ILC learns a high performance feedforward signal from the measured tracking error. In practical applications, the tracking errors of successive experiments contain a repetitive part and(More)
Robots increasingly operate in dynamic environments and in order to operate safely, reliable world models are indispensable. A world model is the robot's view of the world and contains information about obstacle locations and velocities. A two level algorithm is proposed. It is of particular use for teams of cooperating robots and the algorithm is based on(More)
The RoboCup Middle-Size League (MSL) is one of the founding leagues of the annual RoboCup competition. Ever since its birth it has been a league where development of hard-and software happens simultaneously in a real-world decentralized multi-robot soccer setting. Over the years the MSL achieved scientific results in robust design of mechatronic systems,(More)
—This paper focusses on direct dynamic visual servo-ing at high sampling rates in machines used for the production of products that consist of equal features placed in a repetitive pattern. The word " direct " means that the system at hand is controlled on the basis of vision only. More specifically, the motor inputs are driven directly by a vision-based(More)
In this paper, we present the core concept and the benefits of an approach called RoboEarth which will be highly beneficial for future robotic applications in science and industry. RoboEarth is a world-wide platform which robots can use to exchange position and map information as well as task-related, hardware-independent action recipes. This will enable(More)