Search results for "Server"

Observer-Based Robust Control for Switched Stochastic Systems with Time-Varying Delay

2013

Published version of an article in the journal: Abstract and Applied Analysis. Also available from the publisher at: http://dx.doi.org/10.1155/2013/320703 Open Access This paper investigates the problem of observer-based robust H ∞ control for a class of switched stochastic systems with time-varying delay. Based on the average dwell time method, an exponential stability criterion for switched stochastic delay systems is proposed. Then, H ∞ performance analysis and observer-based robust H ∞ controller design for the underlying systems are developed. Finally, a numerical example is presented to illustrate the effectiveness of the proposed approach.

Robust coordinated control algorithm for multiple marine vessels with external disturbances

2013

Published version of an article in the journal: Mathematical Problems in Engineering. Also available from the publisher at: http://dx.doi.org/10.1155/2013/597195 Open Access The problem of coordinated control for multiple marine vessels in the presence of external disturbances is considered in this paper. A robust coordinated control algorithm is proposed for multiple marine vessels. The proposed robust coordinated control algorithm is divided into two parts. The first part develops an extended state observer to estimate the disturbances of marine vessels. The second part presents a robust coordinated control algorithm based on the output of the extended state observer. Furthermore, the rob…

Adaptive high-gain extended kalman filter and applications

2010

The work concerns the ``observability problem” --- the reconstruction of a dynamic process's full state from a partially measured state--- for nonlinear dynamic systems. The Extended Kalman Filter (EKF) is a widely-used observer for such nonlinear systems. However it suffers from a lack of theoretical justifications and displays poor performance when the estimated state is far from the real state, e.g. due to large perturbations, a poor initial state estimate, etc… We propose a solution to these problems, the Adaptive High-Gain (EKF). Observability theory reveals the existence of special representations characterizing nonlinear systems having the observability property. Such representations…

Mazā uzņēmuma IT infrastruktūras veidošana

2015

Kvalifikācijas darbā "Mazā uzņēmuma IT infrastruktūras veidošana" ir dokumentēta tīkla veidošana mazajam uzņēmumam pēc uzņēmuma vadības prasībām. Tika izmantots uzņēmuma serveris, kurš bija jāizpēta, lai noskaidrotu, kas ir nepieciešams uzlabot, lai tas varētu produktīvi un efektīvi strādāt, pildot visus uzdevumus. Tika izvēlēts virtualizācijas risinājums, lai uz viena fiziskā servera vienlaikus darbinātu vairākas virtuālās sistēmas, starp tām sadalot pieejamos resursus, kā arī, lai administratoram būtu vieglāk pārraudzīt un kontrolēt sistēmu, garantējot lielāku izmantojamību, ietaupot uzņēmuma līdzekļus. Rezultātā tika izveidota mazā uzņēmuma IT infrastruktūra, par kuras drošību arī tika p…

SVILUPPO DI UN SERVER DICOM A BASSO COSTO CON FINI DIDATTICI E DI RICERCA

2004

PURPOSE: This paper describes our experience in developing a DICOM (Digital Imaging and Communications in Medicine) server based on widely available personal computers enabling to use X-ray digital images for teaching and scientific purposes. MATERIALS AND METHODS: The system is based on a DICOM server running on a widely used personal computer. The selected DICOM images are collected directly from the radiological equipment or from a dedicated 3D image processing workstation through a LAN connection and converted into one of the standard formats (JPEG or GIF) to allow their direct importing into multimedia presentations for teaching or scientific purposes. RESULTS: This system allows fast …

Load frequency regulation using observer based non-linear sliding mode control

2019

Abstract In this paper, the generalized extended state observer (GESO) and non-linear sliding mode control (SMC) are merged together to study the frequency deviation problem in multi-area power system. In study, the GESO is used not only for state and disturbance estimation but also for disturbance rejection of the system. The said observer ensures accurate estimation of the actual states leading to convergence of estimation error to zero. The non-linear SMC is used to increase the damping ratio of the system whenever, any perturbations occurs. The proposed observer based controller is compared with an existing two-layer active disturbance rejection control (ADRC) and also validated on larg…

Basic Research Methods for Data Collection

2021

A Distributed approach to the Remote Control and Programming Improvement

2006

The remote control of industrial plants through networks is becoming very important nowadays but it involves several issues that can degrade the performance and usability of the remote plant. This paper presents a distributed architecture improving a remote programming system which allows users to control and to program a plant remotely. The control system is based on a client/server architecture with many user interfaces that control the plant. The remote programming language is a mix of Java and client/server protocol in order to simplify the developing and to avoid the protocol/language translation. In order to obtain more efficiency, the program is developed in the client side and it is…

Unified computing facility design based on open source software

2012

The article describes e-infrastructure development in Latvia and migration to national Cloud as regional partner facility (RPF) in European Union (EU). In Latvia many public and private Computing Clouds is in operation and problem is how to integrate these resources as one RPF and how to design one unified computing facility that is used for many different applications. The authors offer their solution at Cloud software as a Service and Hardware as a Service level which is based on usage of open source packaged bundles.

Darbinieku pārvaldes sistēma

2021

Kvalifikācijas darba ietvaros ir izveidota programmatūra “Darbinieku pārvaldes sistēma”, kura daļēji atvieglos cilvēkresursu pārvaldību. Sistēma palīdzēs uzņēmumam pārvaldīt, kuri darbinieki būs noteiktajos projektos, to, cik stundas lietotājs ir nostrādājis projektos un atvieglos atvaļinājuma pieteikšanu. Programmatūrā var pārvaldīt darbinieku datus, piemēram, kā veidot projektus un tā amatus, kā arī pieteikties projektu amatiem. Sistēmā var pieteikt prombūtnes pie-teikumu, pievienot prasmes, kā arī pievienot dienas izdarītā ierakstus un apskatīt esošajā nedēļā izdarīto. Sistēmas ir kā tīmekļa lietotne un izveidei tika izmantota PHP programmēšanas valoda ar “Laravel” satvaru. Pirmkodā ir a…