Angel de Castro

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The growth of sensor networks during the last years is a fact and within this field, wireless sensor networks are growing particularly as there are many applications that demand the use of many nodes, even hundreds or thousands. More and more applications are emerging to solve several problems in data acquisition and control in different environments,(More)
Low-cost robots are characterized by low computational resources and limited energy supply. Path planning algorithms aim to find the optimal path between two points so the robot consumes as little energy as possible. However, these algorithms were not developed considering computational limitations (i.e., processing and memory capacity). This paper presents(More)
A new digital control technique for power factor correction is presented. The main novelty of the method is that there is no current sensor. Instead, the input current is digitally rebuilt, using the estimated input current for the current loop. Apart from that, the ADCs used for the acquisition of the input and output voltages have been designed ad-hoc.(More)
Developing integrated hardware interfaces for different actuators allows rapid and easy integration into existing wireless networks. Wireless sensor networks (WSNs) have become widely relevant in recent years, facilitating data collection through a large number of nodes measuring different physical parameters in various environments. Such networks require(More)
implementation of fixed and variable frequency ADALINE schemes for grid connected VSI synchronization " , in proc. A centroid-based PWM switching technique for full bridge inverter applications " , Random pulse width modulation techniques for converter-fed drive systems–A review " , Design of an FPGA based real-time simulator for electrical system " , in(More)