1 Laboratory for Atmospheric Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland 2 Leibniz-Institute for Tropospheric Research, 04318 Leipzig, Germany 3 School of Earth, Atmospheric and Environmental Sciences, University of Manchester, M60 1QD, UK 4 Institute for Atmospheric Physics, German Aerospace Centre, 82234 Wessling, Germany * now at: Institute for Atmospheric and Climate S...

In this paper a data-driven methodology based on the Virtual Reference Feedback Tuning is presented for the tuning of Internal Model Controllers. A data based test is presented to check the robust stability of the controller in the loop, taking advantage of the control structure. Two different examples are shown where the presented method successfully controls a non-minimum phase discrete time ...

Cluditem is a routing algorithm for wireless sensor networks developed for applications of environmental monitoring with periodic measurement of variables. These applications tolerate a maximum phase shift of the clocks of nodes in the order of milliseconds. This paper proposes two centralized synchronization schemes that introduce a limited processing load. The objective of the work was to ass...

A new technique for ascertaining the thermodynamic cloud phase from high-spectral-resolution ground-based infrared measurements made by the Atmospheric Emitted Radiance Interferometer (AERI) is presented. This technique takes advantage of the differences in the index of refraction of ice and water between 11 and 19 mm. The differences in the refractive indices translate into differences in clou...

Approximate Dynamic Inversion has been established as a method to control minimum-phase, nonaffine-incontrol systems [1]. In this report, we re-state the main results of [1], clarify some minor notational errors, and prove the same results in an expanded form. In the large, the main results of [1] still stand. The development follows [1] closely, and no novelty is claimed herein. The purpose of...

—Source of speech signal consists of voiced part and unvoiced part. In conventional source-filter model, those two sources are considered to be independent. But in real situation it is difficult to segregate the source into voiced and unvoiced part. Actual source consists of mixture of two sources and the ratio varies according to the contents or intention of the speaker. In this paper we tried...

Current engineering practice for adaptive control schemes is to base the design on globally convergent schemes for simple plant models, An important class of such schemes uses least squares estimation of assumed simple input–output models and constructs the controller using the parameter estimates. This paper studies the robustness of such schemes to the presence of unmodelled plant colourcd no...

U NLIKE robust control, which chooses control gains based on a prior, fixed level of modeling uncertainty, adaptive control algorithms tune the feedback gains in response to the true plant and exogenous signals: that is, commands and disturbances. Generally speaking, adaptive controllers require less prior modeling information than robust controllers and thus can be viewed as highly parameter-r...

We propose a solution to the problem of semiglobal output regulation for nonlinear minimum-phase systems driven by uncertain exosystems that does not rely upon conventional adaptation schemes to estimate the frequency of the exogenous signals. Rather, the proposed approach relies upon regressionlike arguments used to derive a nonlinear internal model able to offset the presence of an unknown nu...

Controlled intersymbol interference may be used to design bandwidth efficient coded modulation schemes. The performance of the optimum receiver depends only on the free distance of the code and is independent of its phase. Large reductions in receiver complexity are obtained by using reduced search detection techniques like the MAlgorithm (MA). However, we show that MA detector performance depe...