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In this paper, a hybrid coevolutionary programming method is used for revenue maximization of six generating firms (in a modified IEEE 30-bus power system) who compete to serve the system demand. The system is a typical model of a market with numerous supply and demand agents. This single sided electricity market can be modeled as a game in which each supplier is a player. Each player searches for...
This paper explores the use of a discretization procedure based on multirate sampling called generalized sample-data hold function (GSHF) for modeling and control purposes. Within this framework, the designer is allowed to use the degrees of freedom provided by the GSHF to deliberately cause stable pole-zero cancellations and, thus, obtaining reduced-order discrete-time models from linear continuous-time...
In this paper, an adaptive sliding mode control scheme capable of solving the problem of stabilizing a class of nonholonomic systems in chained form with unknown control direction affected by uncertain nonlinear drift term and parametric uncertainties is proposed. The crucial point is the necessity of reformulating the system model so as to make the uncertain terms appear in matched form. The system...
An atomic force microscope (AFM) usually employs proportional-integral (PI) control strategy to sustain a constant cantilever deflection. However, it is well known that the tuning of PI parameters is a tedious and complicated procedure, especially for those unfamiliar with control theory. In this paper, we employ and implement relay controller to automate the tuning procedure for contact-mode AFM...
The paper treats a question of adaptive proportional-integral (PI) and adaptive proportional-integral-derivative (PID) controller design for nonlinear systems as well as the design of a universal adaptive controller which is an extension of the adaptive PI (PID) control scheme. The presented design methodology guarantees desired output transient performance indices by inducing of two-time-scale motions...
A set of controllers' fragility plots based on the delta epsilon fragility index, is proposed as a tool to analyze the influence of the proportional integral derivative (PID) controller parameters' variations over the control loop robustness. Examples are used to illustrate the use of the plots.
The goal of this paper is to control intake's manifold pressure of a downsized turbocharged internal combustion gasoline engine. Since intake's manifold pressure is an image of the torque that the engine develops, tracking an appropriated intake's manifold pressure reference implies tracking driver's reference torque. This paper proposes a novel control architecture based on Q-LPV Hinfin closed loop...
A tuning method for Two-Degree-of-Freedom (2-DoF) proportional integral (PI) controllers for First-Order-Plus-Dead-Time (FOPDT) models is presented. It allows the designer to deal with the closed-loop control system performance-robustness tradeoff specifying the required minimum robustness level selecting its maximum sensitivity in the 1.2 to 2.0 range. In addition, the performance is measured by...
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