ResumenEste trabajo deduce el modelo dinámico de un Quadrotor, que consiste en una estructura central donde se encuentran las baterías y la aviónica del dispositivo unida a cuatro largueros con un conjunto propulsor (motor-hélice) en el extremo de cada larguero, formando una cruz perfecta brindando la posibilidad de sustentarse en el aire controlando su orientación y traslación.Múltiples artículos hablan de este modelo dinámico en los cuales se hacen suposiciones para vehículos bajo techo, simplificando considerablemente la complejidad del modelo. Por esta razón se modela físicamente la dinámica del vehículo como un sistema no lineal tomando en cuenta fenómenos aerodinámicos de las hélices. Luego se realiza una linealización del modelo y una comparación entre los modelos "real" y "linealizado" usando un control LQR estabilizante. Palabras claveModelo dinámico, sistema lineal, sistema no lineal, quadrotor, control LQR. AbstractThis work shows the study of the dynamic model for a quad-rotor helicopter, which consists of a central body formed by a box with the batteries and on-board computers for control and avionic functions. The body is joined by four beams which have a motor with two rotating wings at the far extreme of each of them. This gives sustentation to the vehicle and gives the possibility of controlling the orientation and translation of the system. Although several theoretical papers can give account of the quad-rotors dynamic model, many of these attempts make several assumptions that are only true for small indoor type vehicles. For this reason, the first stage of this work is to model physically the dynamics of the vehicle as a totally non-linear system, where the complex dynamics of the rotating wings are taken into account. This is followed by a linearization and a comparison between the "real" and linear systems and then design a LQR control for it stabilization. Modelamiento Dinámico y control LQR de un Quadrotor Modeling and LQR control of a Quadrotor

Closed loop infusion systems may have a role in critical care practice. However, for most applications, further development is required to move this technology from the innovation phase to the point where it can be evaluated so that its role in critical car practice can be defined. Each application of closed loop infusion systems must be independently validated by appropriately designed research studies. Users should be provided with the clinical parameters driving each closed loop system so that they can ensure that it agrees with their opinion of acceptable medical practice. Clinical researchers and leaders in industry should collaborate to perform the scientifically valid, outcome-based research that is necessary to evaluate the effect of this new technology. The original model we developed for technology assessment required the addition of several more questions to produce a complete analysis of an emerging technology. An emerging technology should be systematically assessed (using a model such as the model developed by the Society of Critical Care Medicine), before its introduction into clinical practice in order to provide a focus for human outcome validation trials and to minimize the possibility of widespread use of an unproven technology.