نتایج جستجو برای: networked control systems ncs

تعداد نتایج: 2358638  

2011
Abouelabbas Ghanaim Georg Frey

This paper presents a two-step approach for modeling delays in Networked Automation and Control Systems (NAS/NCS). The approach combines the two well-known techniques: formal modeling using Colored Petri Nets (CPN) and mathematical modeling using Markov models to achieve this purpose. The first step is to build and simulate a structure-conserving hierarchical timed model for the whole NAS/NCS u...

2014
Ben W. Carabelli Frank Dürr Boris Koldehofe Kurt Rothermel

Networked control systems (NCS), such as the smart power grid, implement feedback control loops by connecting distributed sensors and actuators to a remote controller over a communication network. In order to avoid the costly and timeconsuming installation of dedicated networks, NCS can bene t from utilizing readily available IP networks such as the Internet. However, as control systems are typ...

2011
Kun Liu Emilia Fridman

This paper presents a new stability and L2-gain analysis of linear Networked Control Systems (NCS). The new method is inspired by discontinuous Lyapunov functions that were introduced by Naghshtabrizi et al. (Syst. Control Lett. 2008; 57:378–385; Proceedings 26th American Control Conference, New York, U.S.A., July 2007) in the framework of impulsive system representation. Most of the existing w...

The Networked Control System in modern control widely uses to decrease the implementation cost and increasing the performance. NCS in addition to its advantages is inevitable. Nevertheless they suffer of some limitations and deficiencies. Packet loss is one of the main limitations which affect the control system in different conditions and finally may lead to system instability. For this reason...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم پایه دامغان 1389

in this thesis, ‎‎using‎‎ ‎concept‎s‎ ‎of‎ ‎wavelet‎s‎ ‎theory ‎‎‎som‎e‎ ‎methods‎‎ ‎of‎ ‎th‎e ‎solving‎‎ ‎optimal‎‎ ‎‎con‎tr‎ol‎ problems ‎(ocps)‎‎. ‎g‎overned by time-delay systems is investigated. ‎th‎is‎ thesis contains ‎tw‎o parts. ‎‎first, the method of obtaining ‎o‎f ‎the‎ ‎‎ocps‎ in time delay systems by linear legendre multiwavelets is ‎ ‎presented‎.‎‎‎‎ the main advantage of the meth...

Journal: :IEEE Transactions on Automatic Control 2021

A popular design framework for networked control systems (NCSs) is the emulation-based approach combined with Lyapunov-based analysis techniques hybrid systems. In virtually all papers that use this framework, bounds in terms of maximal allowable transmission interval (MATI) are provided to guarantee stability, and performance properties NCS. However, having only such a MATI condition rather re...

2003
Michael S. Branicky Vincenzo Liberatore Stephen M. Phillips

We provide a general framework for networked control systems (NCSs) and review previous theoretical results for NCS co-design. We present experimental studies of control and feedback scheduling of NCSs, consisting of dynamic system simulations for the control agents and environment and packet-level network simulations for the communications. To this end, we have extended the ns-2 release in ord...

2014
Nguyen Trong Cac Nguyen Xuan Hung Nguyen Van Khang

In the context of Networked Control Systems (NCS), communication time delays strongly influence on the Quality of Control (QoC) of process control applications. The goal of this paper is to propose a way to calculate the closed-loop communication time delay and we compensate this time delay using the pole placement design method in order to improve the QoC for CAN-based NCSs. We consider severa...

Journal: :Int. J. Systems Science 2008
Ye Yang Yongji Wang Shuang-Hua Yang

This paper discusses the compensation of the transmission delay in a networked control system (NCS) with a state feedback, which possesses a randomly varying transmission delay and uncertain process parameters. The compensation is implemented by using a buffer in the actuator node and a state estimator in the controller node. A Linear Matrix Inequality (LMI) based sufficient condition for the s...

2005
Ye Yang Yongji Wang Shuang-Hua Yang

This paper discusses the compensation of the transmission delay in a networked state feedback control system (NCS), which possess a randomly varying transmission delay and uncertain process parameters. The compensation is implemented by using a buffer in the actuator node and a state estimator in the controller node. A Linear Matrix Inequality (LMI) based sufficient condition for the stability ...

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