P.W.J.M. Nuij

TL;DR: In this article, a feedback control approach for real-time, autonomous suppression and stabilization of tearing modes in a tokamak is presented. But the system combines an electron cyclotron emission diagnostic for sensing of the tearing mode in the same sight line with a steerable ECRH/ECCD antenna, and set-points are generated in real time and forwarded to the steerable launcher and as a modulation pulse train to the gyrotron.

TL;DR: In this paper, a frequency domain based method for controller design for nonlinear systems is presented, which is applied to optimally design a feed forward friction compensator for an industrial motion stage in a transmission electron microscope.

TL;DR: A mapping from the parameters defining the nonlinear and LTI dynamics to the output spectrum is derived, which allows analytic description and analysis of the corresponding higher order sinusoidal input describing functions.

TL;DR: In this paper, an integrated installation that facilitates closed-loop control of magnetohydrodynamic (MHD) events in a tokamak by means of electron cyclotron resonance heating and current drive is presented.

TL;DR: In this paper, a broadband signal is used to measure a linear approximation of the system dynamics and the influence of nonlinearities, which yields a quantitative measure of the power generated by nonlinearity at harmonics of the input frequency as a function of this frequency and signal amplitude.