Niels van Dijk

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Chatter is an instability phenomenon in machining processes which limits productivity and results in inferior workpiece quality, noise and rapid tool wear. The increasing demand for productivity in the manufacturing community motivates the development of an active control strategy to shape the chatter stability boundary of manufacturing processes. In this(More)
Profiling technologies are the facilitating force behind the vision of Ambient Intelligence in which everyday devices are connected and embedded with all kinds of smart characteristics enabling them to take decisions in order to serve our preferences without us being aware of it. These technological practices have considerable impact on the process by which(More)
In this paper, we experimentally demonstrate an extremum-seeking control strategy for nonlinear systems with periodic steady-state outputs, for the adaptive design of variablegain controllers. Variable-gain control can balance the tradeoff between low-frequency disturbance suppression and sensitivity to high-frequency noise in a more desirable manner than(More)
Fundamental Aspects of Materials and Energy, Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, Delft, 2629 JB, The Netherlands, Materials Innovation Institute, Mekelweg 2, Delft, 2628 CD, The Netherlands, Dalton Cumbrian Facility, The University of Manchester, Westlakes Science and Technology Park, Moor Row, Cumbria CA24 3HA, UK,(More)
  • Niels van Dijk, Nathan van de Wouwa, Wilco Pancrasb, Henk Nijmeijera
  • 2006
1 Introduction The research discussed here presents a method for determining time-optimal trajectories for industrial manipulators along a pre-defined path [1]. Instead of taking into account dynamic equations of a manipulator with actuator torque limits and possible torque-rate limits [2], we only require knowledge on the kinematics of a manipulator(More)