Based on the mathematical model of the permanent magnet synchronous motor (PMSM), a novel sliding mode variable structure input-output feedback linearization controller is proposed. A precision linearization method is employed to achieve input-output linearization and decoupling control of the motor, which is decoupled into a second-order linear speed subsystem and a first-order linear d-axis c...

An analytic approach combining the effect of equilibrium diamagnetic flows and the finite ion-sound gyroradius associated with electron-ion decoupling and kinetic Alfvén wave effects is derived to study resistive drift instabilities in a plasma slab. Linear numerical computations using the NIMROD code are performed with cold ions and hot electrons in a plasma slab with a doubly periodic box bou...

We systematically investigate the intercore coupling in triple-core photonic crystal fibers (PCFs). Coupledmode equations are developed and solved analytically in the linear approximation. We derive the eigenmodes in triple-core PCFs, in particular we model the decoupling mode and test its stability against perturbations. The coupling coefficients and the coupling length are determined experime...

This paper deals with control of Timed Event Graphs (TEG). In a first part the disturbance decoupling problem for TEG is defined. In a second part we propose the synthesis of an optimal output feedback controller ensuring the disturbance decoupling and preserving the state of the system.

This paper addresses the input-output decoupling problem for discrete-time nonlinear systems by measurement feedback. Necessary and sufficient conditions are given to solve the problem by static or dynamic measurement feedback, respectively. Since the dynamic measurement solution presented here depends on the solution of the input-output linearization problem, a sufficient condition for lineari...

The purpose of this paper is to derive constructive necessary and sufficient conditions for the problem of disturbance decoupling with algebraic output feedback. Necessary and sufficient conditions have also been derived for the same problem with internal stability. The same conditions have also been expressed by the use of invariant zeros. The main tool used is the dual-lattice structures intr...

Hydraulic actuators are well described by nonlinear system modeling. Nonlinear control for differential cylinders may be realized in order to obtain disturbance decoupling. However, such a system cannot be decoupled from the disturbance and therefore it is necessary to compute a nonlinear disturbance attenuation controller that reduces the influence of the disturbance with respect to the system...

In this paper, we experimentally demonstrate non-degenerate parametric resonance in a torsional micro electro mechanical (MEM) oscillator with two interacting mechanical modes of oscillation. The parametric oscillation results from a displacement-dependent electrostatic force generated in both the modes of oscillation. There is a decoupling of the input and the output frequencies in this mode o...

High-resolution charge-exchange recombination spectroscopic measurements of B 5+ ions have enabled the first spatially resolved calculations of the radial electric field (E r) in the Alcator C-Mod pedestal region [E. offer new challenges for theory and simulation and provide for important comparisons with other devices. Qualitatively, the field structure observed on C-Mod is similar to that on ...

The extreme precision requirements in semiconductor manufacturing drive the need for an active vibration isolation system in a laser pattern generator. Optimizing the controller would not only improve isolation performance, but could also reduce the cost of ownership by extending lifetime of consumables and stretch service intervals. The optimization has been performed and evaluated in a model ...