The paper considers the digital control of a continuous-time process under stochastic disturbances. The problem consists in finding a controller that guarantees a certain performance of the closed loop, while the disturbances belong only to a given class of disturbances. The digital controller has two parts with different sampling rates, where one rate is a multiple of the other one. The soluti...

The paper establishes the design procedure for the state feedback control of linear discrete-time systems, considerable as an interposed design criterium in the form of linear matrix inequalities. The goal is to design the feedback control which guarantees bounded H2 performance index for the system transfer function matrix and H∞ norm attenuation for the disturbance transfer function matrix, b...

In this paper, we present a method for system stabilisation through independent designs of the decentralised controller. The proposed method extends the practical applicability of the conventional μ interaction measure (μ-IM) to unstable systems. The decentralised controller is designed based on a block diagonal approximation that is different from the block diagonal elements, but has the same ...

This paper considers how competition can affect aggregate innovative activity through its effects on firms’ decision whether or not to vertically integrate. A moderate increase in competition enhances innovation incentives, too much competition discourages innovative effort. These effects generates an inverted-U relationship between competition and innovation and between competition and the inc...

A multi-period repetitive control system is a type of servomechanism for a periodic reference input. Even if a plant does not include time-delay, the transfer function from the periodic reference input to the output and that from the disturbance to the output of the multi-period repetitive control system generally have an infinite number of poles. In order to specify the input-output characteri...

In this paper we develop a new control design procedure for continuous-time switched linear systems. Beyond the global stability, two performance indexes based on H∞ theory and passivity are considered. The proposed switching control design is entirely based on convex combinations of subsystems transfer functions. In this precise context a new min-type switching function depending on the state ...

Bilateral transfer of perceptual and motor components in movement control was investigated through two experiments. In Experiment 1 a simple anticipatory timing task was practiced with either the preferred or the nonpreferred hand. After a short resting interval an additional set of trials was performed with the contralateral hand. In Experiment 2, the same experimental design was used to inves...

A frequency domain method based on the parametric transfer function concept is developed for the design of digital control systems with time-delayed continuous-time plants.”Themethod allows to investigate the behavior of sampled-data systems in continuous-time in terms of input-output relations. An algorithm is presented for the design of an optimal digital controller that minimizes a quadratic...

Many papers analyze the role of controllability and observability indices of normal linear systems in control theory and their use in the study of structural properties. This work introduces these indices for linear discrete-time descriptor systems. Such indices are studied in two different ways, by means of the state-space approach and using its transfer matrix . A canonical form of the state-...

The Channel Archiver [1] has been operational for more than two years at Los Alamos National Laboratory and other sites. This paper introduces the available components (data sampling engine, viewers, scripting interface, HTTP/CGI integration and data management), presents updated performance measurements [2] and reviews operational experience with the Channel Archiver.