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1
Content available Jacking and energy consumption control over network for jack-up rig: simulation and experiment
Do Viet-Dung, Dang Xuan-Kien, Tran Tien-Dat, Pham Thi Duyen-Anh
Polish Maritime Research
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2022
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nr 3
89--98
EN
Oil and gas projects differ from regular investment projects in that they are frequently large-scale, categorised as vital national projects, highly technological, and associated with significant risks. Drilling rigs are a crucial component of the oil and gas sector and the majority of the systems and equipment aboard drilling rigs are operated automatically. Consequently, it is crucial to address the topic of an advanced control theory for off-shore systems. Network technology connected to control is progressively being used to replace outdated technologies, together with other contemporary technologies. In this study, we examine how to adapt a networked control jacking system to the effects of internal and external disturbances with a time delay, using a Fuzzy controller (FC)-based particle swarm optimisation. To demonstrate the benefit of the proposed approach, the developed Fuzzy Particle Swarm Optimisation (FPSO) controller is compared with the fuzzy controller. Finally, the results from simulations and experiments utilising Matlab software and embedded systems demonstrate the suitability of the proposed approach.
2
Embedded systems based on Raspberry Pi programmed with CODESYS
Smołka J.
Studia Informatica
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2018
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Vol. 39, nr 1
77--87
EN
This chapter contains information about creating of software for embedded devices like Raspberry Pi with programming tools dedicated for industrial systems. It describes hardware and software solutions and capabilities available on the market. Short part of this chapter contains information about test.
PL
W artykule opisano problematykę tworzenia oprogramowania dla urządzeń wbudowanych takich jak Raspberry Pi za pomocą narzędzi przeznaczonych do rozwiązań przemysłowych. Opisano możliwości zarówno sprzętowe, jak i programowe rozwiązań dostępnych na rynku. Krótki fragment zawiera informację o przeprowadzonych testach.
3
Content available Assessment of delays in the application layer of an event-driven networked control system
Majcher A.
Problemy Eksploatacji
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2016
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no. 1
41--53
EN
Problems of networked control systems (NCSs) are associated with inherent time delays. In such systems, particularly those applied to supervise batch processes, tasks with flexible time frames are also performed. However, even in such cases, the knowledge of border delay values is necessary. The article presents a simulation model for an event-driven NCS in which the events are initiated in the main controller and executed in local controllers. The author discusses the results of tests on the efficiency of the model, assessed in the application layer, and the results of verification tests with a real PLC and a Modbus TCP protocol. The structure of the control system and the method for the analysis of its efficiency can be used in the design of process control systems, simulators with virtual objects, and hardware-in-the-loop test systems.
PL
Problemy systemów sterownia sieciowego (NCS) związane są z inherent-nymi dla nich opóźnieniami czasowymi. W systemach takich, szczególnie w sterowaniu procesami wsadowymi, wykonywane są także zadania o luźnych ograniczeniach czasowych, ale wymagające dokładnej znajomości granicznych wartości opóźnień. W artykule przedstawiono model symulacyjny sytemu NCS z obsługą zdarzeń wyzwalanych w sterowniku głównym i wykonywanych w sterownikach lokalnych. Przedstawiono wyniki badań wydajności modelu ocenianej w warstwie aplikacji oraz badań weryfikacyjnych z rzeczywistym sterownikami PLC i protokołem Modbus TCP. Przestawiona struktura systemu i metoda analizy jego wydajności może znaleźć zastosowanie w projektowaniu systemów sterowania procesami technologicznymi oraz projektowaniu symulatorów z wirtualnymi obiektami sterowania i rozwiązań typu hardware-in-the-loop.
4
Content available Fault diagnosis in a networked control system under communication constraints: A quadrotor application
Chabir K., Sid M. A., Sauter D.
International Journal of Applied Mathematics and Computer Science
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2014
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Vol. 24, no. 4
809--820
EN
This paper considers the problem of attitude sensor fault diagnosis in a quadrotor helicopter. The proposed approach is composed of two stages. The first one is the modelling of the system attitude dynamics taking into account the induced communication constraints. Then a robust fault detection and evaluation scheme is proposed using a post-filter designed under a particular design objective. This approach is compared with previous results based on the standard Kalman filter and gives better results for sensor fault diagnosis.
5
Content available The real-time network control of the inverted pendulum system based on Siemens hardware
Turnau A., Knapik D., Marchewka D., Rosół M., Kołek K., Gorczyca P.
Automatyka / Automatics
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2013
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Vol. 17, no. 1
83--92
EN
A pendulum on a cart system is often regarded as benchmark for control algorithms. In the paper such feature of the inverted pendulum is used to verify complex control system. Design and implementation of a networked control system containing a PLC and a servo driver is described. A control algorithm for inverted pendulum is shown and experiments results are presented. The findings may be used in a networked control system verification.
PL
Wahadło odwrócone jest powszechnie uznanym wzorcem do testowania algorytmów sterowania. W pracy wykorzystano powyższą cechę wahadła odwróconego w celu weryfikacji złożonego systemu sterowania. Omówiono projekt i implementację sieciowego systemu sterowania złożonego ze sterownika PLC i sterownika napędu. Przedstawiono budowę algorytmu sterującego układem wahadła odwróconego oraz zaprezentowano wyniki rzeczywistych eksperymentów. Przeprowadzone badania mogą zostać użyte w celu weryfikacji sieciowych systemów sterowania.
6
Content available remote Fault tolerance in networked control systems under intermittent observations
Georges J. P., Theilliol D., Cocquempot V., Ponsart J. C., Aubrun C.
International Journal of Applied Mathematics and Computer Science
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2011
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Vol. 21, no 4
639-648
EN
This paper presents an approach to fault tolerant control based on the sensor masking principle in the case of wireless networked control systems. With wireless transmission, packet losses act as sensor faults. In the presence of such faults, the faulty measurements corrupt directly the behaviour of closed-loop systems. Since the controller aims at cancelling the error between the measurement and its reference input, the real outputs will, in such a networked control system, deviate from the desired value and may drive the system to its physical limitations or even to instability. The proposed method facilitates fault compensation based on an interacting multiple model approach developed in the framework of channel errors or network congestion equivalent to multiple sensors failures. The interacting multiple model method involved in a networked control system provides simultaneously detection and isolation of on-line packet losses, and also performs a suitable state estimation. Based on particular knowledge of packet losses, sensor fault-tolerant controls are obtained by computing a new control law using fault-free estimation of the faulty element to avoid intermittent observations that might develop into failures and to minimize the effects on system performance and safety.
7
Content available remote Networked control system for a pitch-plane model of a magnetorheological suspension
Sapiński B., Rosół M.
Archives of Control Sciences
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2005
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Vol. 15, no. 2
175-186
EN
The study is concerned with a networked control system (NCS) for vibration control in a two degree of freedom (2DOF) pitch-plane model of a magnetorheological (MR) suspension. Pitch-plane model of MR suspension is described. The structure of the NCS utilizing a serial bus standard CAN and 16-bit industrial microcontroller of the M16C6N family are characterized. results of NCS experimental testing conducted in the pitch-plane model of MR suspension are provided.
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