In this paper the structural controllability of a class of a nonlinear system is investigated. The transfer function (matrix) of nonlinear systems is obtained by putting the nonlinear system model on non-commutative ring. Conditions of structural controllability of nonlinear systems are presented according to the criterion of linear systems structural controllability in frequency domain. An exa...

We construct two error feedback controllers for robust output tracking and disturbance rejection of a regular linear system with nonsmooth reference and disturbance signals. We show that for sufficiently smooth signals the output converges to the reference at a rate that depends on the behavior of the transfer function of the plant on the imaginary axis. In addition, we construct a controller t...

F. M. Callier is a Professor at the Facultes Universitaires Notre-Dame de la Paix, Namur, Belgium and C. A. Desoer is a Professor at the University of California, Berkeley, USA. Multivariable Feedback Systems is the result •of their teaching of a first-year graduate course on multivariable feedback systems addressed to control engineers. The text covers finite-dimensional time-invariant linear ...

A linear matrix inequality approach to synthesizing low-order suboptimal mixed l /H N controllers ଝ Abstract Mixed objective control problems have attracted much attention lately since they allow for capturing di!erent performance speci"cations. However, optimal multiobjective controllers may exhibit some undesirable properties such as arbitrarily high order. This paper addresses the problem of...

Head Related Transfer Function (HRTF) libraries enable the generation of virtual acoustic sources in arbitrary spatial positions. In experiments with a large number of test subjects, general or non-personified HRTF libraries are used, measured with human-shaped dolls. The resolution of azimuth in the frontal area is much better than in lateral areas. To improve resolution in lateral areas, Prin...

We describe an application of the Legendre transform to communication networks. The Legendre transform applied to max-plus algebra linear systems corresponds to the Fourier transform applied to conventional linear systems. Hence, it is a powerful tool that can be applied to max-plus linear systems and their identification. Linear max-plus algebra has been already used to describe simple data co...

Prediction of annual rice production in all the 31 districts of Tamilnadu is an important decision for the Government of Tamilnadu. Rice production is a complex process and non linear problem involving soil, crop, weather, pest, disease, capital, labour and management parameters. ANN software was designed and developed with Feed Forward Back Propagation (FFBP) network to predict rice production...

Accurate transfer function estimation of linear, noise-free, dynamic systems is an easy task for SigLabTM. Often, however, the system being analyzed is noisy or not perfectly linear. All realworld systems suffer from these deficiencies to some degree, but control systems are usually the worst offenders. Obtaining an accurate transfer function estimation from a noisy and nonlinear system require...