Transient stability problem for a single machine infinite bus system with the generator excitation and thyristor controlled series compensation when damping coefficients are measured inaccurately is investigated. A robust coordinated passivation controller is designed to achieve the stability of the rotor angle and speed. The excitation voltage control is obtained by means of adaptive back-step...

The purpose of this paper is to investigate the effect alternate flux bridge combining Halbach array in Vernier machines. key novelty that integrated with PM, design can not only provide a path for low-order harmonics but also effectively improve torque density machine. Together other three traditional structures under same overall size, current density, and PM usage, proposed structure optimiz...

Fringing field has to be taken into account in the formulation of electrostatic parallel-plate actuators when the gap separating the electrodes is comparable to the geometrical dimensions of the moving plate. Even in this case, the existing formulations often result in complicated mathematical models from which it is difficult to determine the deflection of the moving plate for given voltages a...

Progress in aircraft designs heavily depend on automatic flight control system. Modern aircraft have a wide flight envelope (linear and nonlinear) region. This study considers the design of stability and control augmentation system (SCAS) in high angle of attack region for a modern type aircraft via back stepping method. Because of highly nonlinear phenomena in aerodynamic parameters, a locally...

The mosquito life cycle is developed mathematically with the concept of difference equation. qualitative properties life-cycle are analyzed. Lyapunov function defined for equation to stabilize system cycle. A novel technique applied deriving stability criterion, especially back-stepping control discrete time system. bifurcation analysis also furnished model new in and its results examined throu...

ABSTRACT: To develop an unmanned automatic excavator system the control performance of hydraulic actuators should be guaranteed. However, hydraulic actuators with single rod cylinder have inherently severe nonlinearities that significantly affect to the command following performance of end-effect. PID control system widely used in industries is not proper to compensate the nonlinearities and it...

The recently proposed saturated adaptive robust controller is integrated with desired trajectory compensation to achieve global stability with 9 much improved tracking performance. The algorithm is tested on a linear motor drive system which has limited control effort and is subject to parametric uncertainties, unmodeled nonlinearities, and external disturbances. Global stability is achieved by...

The original back-propagation methods were plagued with variable parameters which affected both the convergence properties of the training and the generalisation abilities of the resulting network. These parameters presented many difficulties when attempting to use these networks to solve particular mapping problems. A combination of established numerical minimisation methods (Polak-Ribiere Con...