A hierarchical fuzzy sliding-mode control is proposed to achieve asymptotic stability and favorable decoupling performance. In this approach, the nonlinear system is decoupled into several subsystems and the state response of each subsystem can be designed to be governed by a corresponding sliding surface. Then the whole system is controlled by a hierarchical sliding-mode controller. The propos...

Theories for the exact and approximative decoupling of 2 × 2 transfer function matrices are well developed and readily available in the literature. Extended to a 3 × 3 structure, decoupling approaches sometimes turn out to be somewhat complicated to perform. In this paper, a primary refiner is modeled using a linear 3× 3 system structure. In addition to consistency and motor load, refining zone...

Decoupling is a long-standing problem which our first works carried out on VHSIC decoupling, which at that time linked 100 bits, led to significant power noise reductions (réf. 1 and 2). Recently, WINKEL (ref. 3) made it clear that “Modern, especially high integrated, systems needs new, the so called hierarchical decoupling strategies, in order to cover the high-mid-and low frequency range. The...

We provide a general framework for constructing digital dynamical decoupling sequences based on Walsh modulation — applicable to arbitrary qubit decoherence scenarios. By establishing equivalence between decoupling design based on Walsh functions and on concatenated projections, we identify a family of optimal Walsh sequences, which can be exponentially more efficient, in terms of the required ...

Three-phase bearingless induction motor is a multi-variable, nonlinear and strong coupling object, to achieve its high performance control, the dynamic mathematical models was analyzed firstly. According to the derived mathematical model, the reversibility of bearingless induction motor system was discussed, and the dynamic mathematical models of inverse system were derived. Then, based on the ...

A novel design of decoupling network for a compact threeelement array is presented. The proposed decoupling network has simple and compact structure that can be implemented easily with microstrip lines. The conventional microstrip open stubs can be used to match the decoupled ports of the array. The proposed decoupling and matching network is applied to a compact three-monopole array operating ...

In this paper we study the interplay of electric and magnetic backgrounds in determining the decoupling limit of coincident D-branes towards a noncommutative Yang-Mills (NCYM) or open string (NCOS) theory. No decoupling limit has been found for NCYM with space-time noncommutativity. It is suggested that there is a new duality, which we call V-duality, which acts on NCOS with both space-space an...

System identification is the underlying mechanism of adaptive filtering algorithms in the context of acoustic echo cancelation systems. Multichannel system identification is subject to specific problems emerging from spatio-temporal couplings in the input signals of the adaptive filter. This paper presents a generic multichannel transformdomain adaptive filtering approach. It is based upon a tw...

The problem to design efficient heteronuclear decoupling sequences is studied using optimal control methods. A generalized version of the gradient ascent engineering (GRAPE) algorithm is presented that makes it possible to design complex non-periodic decoupling sequences which are characterized by tens of thousands of pulse sequence parameters. In contrast to conventional approaches based on av...

Coherent-optical-control schemes exploit the coherence of laser pulses to change the phases of interfering dynamical pathways and manipulate dynamical processes. These active control methods are closely related to dynamical decoupling techniques, popularized in the field of quantum information. Inspired by nuclear magnetic resonance spectroscopy, dynamical decoupling methods apply sequences of ...