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In this study, tennis ball rotation and trajectory are analyzed quantitatively. Fourteen dots are marked on a tennis ball to detect the ball rotation, and the markers' x−y positions are detected from high-speed camera images. First, the 3-D positions of the markers are calculated. Then, the rotation matrix is calculated by using the 3-D marker positions of successive camera frames. The rotation parameters,...
The Algebraic Riccati Equation (ARE) has increasingly played its role for the optimal control theory [1], [2]. Adaptive filters have been a widely used technique in the context of real time solution for ARE [3]. The least mean square (LMS) and the recursive least square (RLS) are among the most well known filters [4], [5]. Nevertheless, these algorithms have a lower learning rate for multivariable...
This paper presents a family of integrated insulated converter to feed power light emitting diodes (LEDs) for street lighting system applications. A Buck, Boost and Buck-Boost converters were used to implement the power factor correction (PFC) and a Flyback converter to perform the power control (PC). The integration between the power stages was made to increase the system reliability by reducing...
This paper considers a control approach for synchronous reluctance machines operating at variable speed regimes based on modern robust control tools. The main challenge arises from the inherent nonlinear magnetic behavior of the machine, caused by core saturation and cross saturation phenomena, resulting in a nonlinear dependence of the machine inductances from the instantaneous values of both direct...
This paper presents an analysis of the magnetic saliencies in induction machines based on the injection of a zero sequence carrier. This way of injection allows evaluating those components of the admittance matrix which are not usually considered in the literature. The injection of the zero sequence carrier can easily be implemented, does not perturb the current control and the evaluation of its response...
This paper proposed a simple modeling approach for the dynamic analysis and characterization of a family of high step-up DC-DC converters obtained by the integration of standard topologies presented by the authors in a previous paper. Simulations and experimental results are obtained to confirm the reliability of the approach.
This paper presents an optimization design methodology for CCM PFC Boost converters with volume and efficiency objectives. The optimization methodology, achieved by mathematical interactions, is based on the concept of the converter integrated design, in other words, all the main physical converter components are designed simultaneously in the function of a pair of overall variables. The integrated...
Although the concept of Smart Grid is not so new, it has aroused the interest of electric companies only in recent years and some countries still lack major studies on methods, techniques and rules. There are many devices that work with legacy or proprietary protocols within the grid that can not be replaced, making it difficult and endearing unification for proper implementation of an intelligent...
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