Some Classes of Convergent Interval Matrices

Some classes of interval matrices for which a necessary and sufficient condition can be obtained in a simple form are indicated. A few sufficient conditions are also derived to assure convergence of interval matrices. Some of these results are discussed in association with their polynomial counterparts

Stability Robustness Conditions for Control Systems with Bounded and Unbounded Nonlinear Gain Elements

Taking the stability robustness into account in every aspect is a current trend in control theory. However, major recent efforts have been focused on the stability robustness of linear control systems, and so, results for nonlinear systems seem to be few. In this respect, we will make several attempts to cope with stability problems for control systems having bounded or unbounded nonlinear gain elements. We consider two tpyes of Lyapunov functions : L₂ type functions, i.e., quadratic functions and L₁ Type ones. The former is used to show the stability of systems with bounded gain elements and the latter for systems with unbounded gain characteristics. The existence of such functions assures robust stability for these nonlinear systems against perturbations in the nonlinear gain elements

ゲンシロシステムカンシノタメノカクリツテキシュホウ : カルマンフィルタノオウヨウ

京都大学0048新制・論文博士工学博士乙第3667号論工博第1091号新制||工||415(附属図書館)5794UT51-53-M199(主査)教授 服部 嘉雄, 教授 西川 ?一, 教授 若林 二郎学位規則第5条第2項該当Kyoto UniversityDA

Synchronization of pulse-coupled oscillators with a refractory period and frequency distribution for a wireless sensor network

The present paper considers the synchronization of globally pulse-coupled oscillators with a refractory period and frequency distribution. The oscillators are capable of achieving time synchronization for a practical wireless sensor network. Furthermore, as a result of the stability analysis of the synchronization, a procedure for designing the oscillators is provided: the determination of the allowable refractory period under a given frequency distribution range. These analytical results are verified by numerical examples