Abstract: We present a control design to solve the global output feedback stabilization problem of a class of uncertain nonlinear systems. Each system in this class consists of some dynamic uncertainties, linear parametric uncertainties and, most importantly, output-dependent uncertain integrator gains or virtual coefficients. To solve the problem, an observer design is proposed, and the robust...

We provide some new necessary and suucient conditions which guarantee arbitrary pole placement of a particular linear system over the complex numbers. We exhibit a non-trivial real linear system which is not controllable by real static output feedback and discuss a conjecture from algebraic geometry concerning the existence of real linear systems for which all static feedback laws are real.

The output feedback pole assignment problem is a classical problem in linear systems theory. In this paper we calculate the number of complex dynamic compensators of order q assigning a given set of poles for a q-nondegenerate m-input, p-output system of McMillan degree n = q(m+p? 1) + mp. As a corollary it follows that when this number is odd, the generic system can be arbitrarily pole assigne...

This paper documents )1( the early phases of using systems Engineering to develop a conceptual system – the system being developed is a systems engineering body of knowledge )SEBoK( and )2( the findings and opportunities generated in those early phases. The approach was based on identifying activities specific to systems engineering, as opposed to the broad raft of activities that systems engin...

A differential space-time block code (DSTBC) modulation scheme is used to improve the performance of DS-CDMA systems in fast time-dispersive fading channels. The resulting scheme is referred to as the differential space-time block code modulation for DS-CDMA (DSTBC-CDMA) systems. The new modulation and demodulation schemes are especially studied for the down-link transmission of DS-CDMA systems...

We study the implementation of block Krylov based iterative methods on distributed computing environments for the solution of general linear systems of equations First we study potential implementation of the classical conjugate gradient CG method on parallel environments From the family of conjugate direction methods we study the Block Conjugate Gradient Block CG method which is based on the c...

In the current study we investigate the two-stage iterative method for solving linear systems. Our new results shows which splitting generates convergence fast in iterative methods. Finally, we solve the Poisson-Block tridiagonal matrix from Poisson's equation which arises in mechanical engineering and theoretical physics. Numerical computations are presented based on a particular linear system...

Hardware virtualization gives administrators the flexibility to rapidly create, destroy and relocate virtual machines across physical hosts. Unfortunately, the storage systems upon which these systems depend are not nearly as agile. To facilitate the rapid, safe development of block devices that can meet the needs of virtual machines, we present the Block Mason virtual block device framework. A...