Ali Chaibakhsh

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In this paper based on the physical rules, thermodynamics principles and energy mass balance, the simulation models are developed and applied to electrical power generating plants in order to characterize the essential dynamic behavior of the boiler subsystems and to use the corresponding models for the power plant processes. These models are developed for(More)
In order to characterize the transient dynamics of steam turbines subsections, in this paper, nonlinear mathematical models are first developed based on the energy balance, thermodynamic principles and semi-empirical equations. Then, the related parameters of developed models are either determined by empirical relations or they are adjusted by applying(More)
In order to adjust temperatures of superheating sections in Benson type once-through boilers, in this paper, a combined feedback-feedforward (FB-FF) fuzzy logic control strategy is employed. The feedforward (FF) control system is able to respond, in advance, to any variation in the system by adjusting the rate of spray in superheating sections. Two local(More)
In order to characterize the behavior of nonlinear dynamic systems many different approaches have been proposed in recent years. One of the best black-box models employed to deal with system nonlinearities is the combination of artificial neural network (ANN) and fuzzy logic system (FLS), which is known as neuro-fuzzy system. However, the gradient-based(More)
This study present an application of Laguerre network-based hierarchical fuzzy modeling approach in fault diagnosis of the temperature sensors in industrial heavy duty gas turbines. The recorded experimental data from the performances of a V94.2 gas turbine unit were employed in modeling stage. A comparison between the responses of the models and real data(More)
in This paper for the first time has been presented a nonlinear controller for controlling the steam turbine combined cycle unit without the re-heater based on soft computing techniques. This controller is provided based on the modified linear and nonlinear models using fuzzy membership functions and simultaneously control valve technique. A comparison(More)
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