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Water supply system has characteristics of non-linear, time-varying parameter, large time delay, so its mathematical model changes time by time. Water supply system widely use PID controller to keep constant pressure and PID controller need accurate mathematical model. The system that use PID controller is along with large overshoot, more adjusting time. Fuzzy controller don't need the accurate mathematical...
Software-Defined Networks (SDNs) introduce interesting new opportunitiesin how network routes can be defined, verified, and changed over time. Yet despite the logically-centralized perspective offered,an SDN still needs to be considered a distributed system:rule updates communicated from the controller to the individualswitches traverse an asynchronous networkand may arrive out-of-order, and hence...
Nowadays, the notion of diseases has been extended from real human diseases to general epidemic information propagations, such as the rumors in distributed systems. Controlling the spread of a disease is usually done through quarantine, where people that have, or are suspected to have, a disease are isolated from having interactions with others. As a tradeoff, normal human interactions are inevitably...
Digital based data processing and protection and control system along with digital communication networks introduces new structures for substation protection and control systems and new methods for intelligent protection and control systems. This paper presents a unique vision for the future integration of protection and control systems. Firstly, the basic concept and configuration of the developed...
This paper addresses the problem of designing a fuzzy H∞ state feedback tracking control for a boiler-turbine system. First, the boiler-turbine system is modeled as a Takagi and Sugeno (TS) fuzzy model. Then, based on the TS fuzzy model, a sufficient condition for the existence of a H∞ fuzzy nonlinear state feedback tracking control is derived in terms of linear matrix inequalities (LMIs). The advantage...
MC (matrix converter) as a novel power converter with many virtues such as sinusoidal control input current and output voltage waveforms, bi-direction power flowing ability, as well as good characteristic of low-frequency performance, it has become a ideal power converter to excitate brushless doubly-fed wind generator. The frequency and amplitude of the output voltage and the grid-connected power...
This paper addresses the problem of non-stationary signal noise suppression, represents the conception of wavelet transformation and puts forward two kinds of measurements to evaluate the effectiveness of noise suppression. Comparison experiments for noise suppression are made using Fourier analysis and Wavelet analysis. Simulation result shows that Wavelet analysis is more suitable for non-stationary...
This work presents a controller for maximum wind energy capture of wind power system according to the theory of auto disturbance rejection controller (ADRC). The uncertainties in the torque of turbine and friction are both considered as an unknown disturbance to the system. The expending state observer can evaluate the unknown disturbance. With the nonlinear state error feedback control law, the disturbance...
The scholars find great interest in matrix converter because of its great merits. But the researches mainly focus on open-loop control, and emphasis on the design of modulation strategy. Because the output and input lines are directly connected in matrix converter, the disturbance and unbalance of input lines affect the quality of the output waveform directly. Furthermore, in high efficient vector...
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