wind power has been widely considered and utilized in recent years as one of the most promising renewable energy sources. in the current research study, aerodynamic analysis of the upwind three-bladed horizontal axis turbine is carried out using blade element momentum theory (bem), and a genetic algorithm (ga) is applied as an optimization method. output power generation is considered as an obj...

this paper addresses the design of an observer-based fault diagnosis scheme, which is applied to some of the sensors and actuators of a wind turbine benchmark model. the methodology is based on a modified sliding mode observer (smo) that allows accurate reconstruction of multiple sensor or actuator faults occurring simultaneously. the faults are reconstructed using the equivalent output error i...

T his paper examined whether monetary policy is acyclical, procyclical or countercyclical and the implications of the interaction of such cyclicality with industrial output on real economic growth in Nigeria. After determining the time series properties of the variables and based on conventional cyclicality measures, the fully modified ordinary least square method was used to examine...

In this paper, we examine a design method of modified PID (Proportional-IntegralDerivative) controllers for multiple-input/multiple-output plants. PID controller structure is the most widely used one in industrial applications. Recently the parametrization of all stabilizing PID controller has been considered. Yamada and Hagiwara proposed a design method of modified PID controllers such that mo...

We establish the equivalence between the optimal least-squares state estimator for a linear time-invariant dynamic system with noise corrupted input and output, and an appropriately modified Kalman filter. The approach used is algebraic and the result shows that the noisy input/output filtering problem is not fundamentally different from the classical Kalman filtering problem. The result is ill...

In this paper, a pole assignmentproblem of lineartime invariantcontrol system by memoryless output feedback is posed as a least squares poles assignmentproblem and analysed. The coat functions are appropriately modified so M to obtain existenceof global minimumand convergence of the correspondinggradientflow. This approachis also extended to accommodate the output pole assignmentproblem with in...

Multi-frequency electrical impedance tomography (EIT) systems require stable voltage controlled current generators that will work over a wide frequency range and with a large variation in load impedance. In this paper we compare the performance of two commonly used designs: the first is a modified Howland circuit whilst the second is based on a current mirror. The output current and the output ...