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Control of transient behavior of RF-MEMS switch membrane is crucial to the durability and reliability of the switch. This work presents a novel technique for controlling the displacement of the switch membrane. The technique shows exceptional capabilities of achieving soft landing of the membrane on contact pads at pull-in voltage, and significant improvement of pull-out transient. The control technique...
A study of one-dimensional position control of a light iron ball levitated by one electromagnet is proposed in this work. The vertical position of the ball is the target of the proposed control strategy. It is assumed that the position measurement of the ball is inaccessible and thus, estimates of the position are utilized as the feedback signal to the controller. Control of the ball's position is...
This work presents a practical approach to the control of tool's position, in orthogonal cutting, in the presence nonlinear dynamic cutting forces and machine tool dynamics. The controller is Linear Quadratic Gaussian (LQG) type constructed from an augmented model of machine tool realization, tool-actuator dynamics, and a nonlinear dynamic model relating tool displacement to cutting forces. The latter...
Due to the ever increasing demand on energy and environmentally friendly sources of energy, it has become important to introduce a source of energy that is efficient and eco-friendly. In this paper, a parametric study of the PEM fuel cell is conducted in order to investigate the effect of different operating parameters on the efficiency and energy output of the cell, and later design parameters are...
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