Papers by Fco. Javier Rodriguez
IEEE Transactions on Instrumentation and Measurement, 2000
This paper proposes a grid impedance monitoring system for distributed power generation electroni... more This paper proposes a grid impedance monitoring system for distributed power generation electronic interfaces. The system estimates the grid equivalent impedance and voltage source from the voltage measurements performed at the point of common coupling. The estimation algorithm is based on a recursive least-squares algorithm implemented in the complex field. Simultaneously, the system evaluates the quality of the estimation, minimizing its influence on the grid and detecting islanding situations. The proposed system performance has been evaluated under experimental testing.
IEEE Robotics & Automation Magazine, 2001
To carry out the navigation task starting with the information given by a sensor, an algorithm ha... more To carry out the navigation task starting with the information given by a sensor, an algorithm has been developed to model environments and plan the path that has to be tracked. It is capable of searching alternative routes if an obstacle has been detected, and chooses the optimal path, tracking smoothly the trajectory, without sudden variations in the robot orientation and movement. The necessary information is received as tuples of X-Z coordinates from an infrared detector, capable of sampling hundreds of points with an aperture angle of 100°. Then, the tuples are ordered by the Z coordinate, and making use of regression methods, the object contours in the scene are modeled. Also the environment borders are detected as line segments. The number detected can be modified, so the model fits well into the environment using different granularity. It is possible to attain higher precision allowing an increase in the processing time. Once the environment is modeled, all the possible alternative trajectories are calculated to avoid the obstacles detected and reach the goal point. Those trajectories are computed and stored as cubic polynomial splines, using four reference systems to avoid impossible tracking through an intermediate point. For the case where the goal cannot be reached with a unique spline, the whole path is divided into several trajectories, joining them in the optimal point with the best orientation
This paper explain the application of hardware-software co-design methodology to the distribution... more This paper explain the application of hardware-software co-design methodology to the distribution of the controller task between the processors of a electronic control systems for a multilevel power converter, in order to increase the controller reliability. This framework operates with a component library that provides multiple alternatives for a given task, each of which is potentially different from the others in terms of reliability, performance, and area metrics. The experimental evaluation demonstrates the importance of including co-design techniques to achieve better system reliability
Trabaja con éxito y ya me pide soluciones que conoce usted muy bien. Calme la impaciencia de su e... more Trabaja con éxito y ya me pide soluciones que conoce usted muy bien. Calme la impaciencia de su espíritu y proceda por orden, obtendrá los resultados que desea. La Alta Ciencia comprende dos cosas: la palabra o el verbo, y las obras, que son la última forma o el complemento del verbo. La ciencia de los signos y de sus correspondencias se inicia con la ciencia de la palabra: la ciencia de la luz y del fuego constituye el secreto de las obras. La Cábala es la ciencia de los signos y de sus correspondencias. La magia es la ciencia de la luz; el hermetismo la ciencia del fuego. La ciencia de los signos comienza con la ciencia de las letras. Las letras son ideas absolutas. Las ideas absolutas son números. Los números son signos perfectos. Uniendo las ideas con los números, se puede operar, tanto con las ideas como con los números y se puede llegar a las matemáticas de la verdad. El tarot es la llave de las letras y de los números; los treinta y seis talismanes constituyen la llave del tarot. El Sepher Jezirah es el texto explicativo de los talismanes de las letras, de los números y del tarot. Todo esto le será demostrado. Gracias por el envío de su noble y austera figura. Le envio la impresión de la mía y de ahora en adelante nos podremos ver. El método que me pidió es el siguiente: no estudie todo a la vez y sea tan paciente como si fuera eterno. Comience por el número uno y la letra Aleph, el juglar del tarot, el as de bastos o la vara de Moisés, el primer capítulo de mi Dogma y el Ritual, el primer capítulo del libro de San Martín: Cuadro natural de las relaciones, etc. (1), el primero de los Sephiroth o Kether y hágame un resumen de todo esto y envíemelo; en el caso de que se pierda, ya le indicaré por dónde ir. Procederemos del mismo modo con el resto de los números.
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Papers by Fco. Javier Rodriguez