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In Mexico, the openly television (TV) has a wide utilization due to several factors, among them, because, as it is known, not all population has access to the subscription TV. In this research, we developed a dual antenna array, for the openly TV frequencies, using an advanced material in order to obtain an antenna array with the appropriate sizes to be considered as a useful option for outdoor use...
In this article an approach based on fractional calculus to control a second order linear process with pure integration at the output is presented. The main contribution of this work is the control strategy, which is a variant of the double loop controller where the proportional outer loop controller is replaced by a fractional derivative one, in order to increase the robustness of the controlled...
Practitioner engineers in both academic and industrial areas, are often faced with the challenge of identifying the model of a given system or process in order to setup a controller or to extract some useful information. Among the existing identification algorithms, those being numerically simple and stable are more attractive for practitioners. This paper deals with identification of state-space...
In this work, the dynamic model and the prototype control for a helicopter of 2 Degrees of Freedom (DOF) are presented. The model of the system is nonlinear and open loop unstable, which is obtained by using the equations of movement of Euler-Lagrange. The resulting linear model is function of an operating point. The controller design consists of two control loops, one for the elevation angle (Pitch)...
This paper presents a new SAR A/D conversion architecture that uses a PWM modulator and a first order low pass filter as alternative to conventional DAC implementations. Design equations were derived and a circuit implementation is proposed. In order to validate the proposed architecture, a 4bit successive approximation A/D converter has been designed and simulated. Then the circuit layout was developed...
In this paper an experimental platform, which is a flexible and open architecture, of a physical model of a quad rotor helicopter is presented. This platform consists of a block that sends data from the UAV sensors to a ground station by radio-frequency serial communication. It also has another block that receives the RF control signal from a Laptop to a controller of brush less motors. The ground...
This paper presents a hierarchical control system designed for permanent DC motor powered by a DC/DC Buck converter. Hierarchical controller based on differential flatness property of the plant system is meant to control the angular speed for tracking trajectories applications. This controller provides the voltage profiles that have to be tracked by the Buck converter and consequently a low hierarchy...
The measurements of the neutron spectrum with the Bonner Spheres Spectrometer system for radiation protection porpoises is an ill-conditioned problem having an infinite number of solutions, therefore, the determination of neutron spectrum is a not a trivial problem because the unknown is not given directly as a result of the Bonner spheres measurements. The current interest in the neutron spectrum...
Based on literature review, electronic systems design employ largely top-down methodology. The top-down methodology is vital for success in the synthesis and implementation of electronic systems. In this context, this paper presents a new computational tool, named BD$^2$XML, to support electronic systems design. From a block diagram system of mixed-signal is generated object code in XML markup language...
This paper shows a control law designed for a DC/DC Buck-Power-Converter and DC-motor system by using the differential flatness property of the plant model. This approach is meant to perform angular speed control for tracking trajectory applications. The flatness property of the DC motor model is exploited in order to propose a high hierarchal control system, which allows the angular speed to track...
This paper presents the development of a level control system using 3D machine vision techniques based on a single level-detector sensor (Kinect), in an arrangement of three tanks. Using image processing algorithms, each one of the tanks is classified within the video sequence as well as each one of the depth measurements is averaged regarding the cross sectional area of the surface of the tanks....
In the technical literature has been reported the array of dc-dc basic switching converters to increase power handling capabilities on dc-dc applications. In this paper, switching step-down dc-dc converters based in the principle of reduced redundant power processing (R2P2) are presented. This principle states that the noncascading connection of dc-dc basic converters increases the efficiency on array...
This work describes a 0.5u m CMOS implementation of a Folded Cascode OTA designed for minimum Input Referred Noise for non-implantable EEG SoC arrays. It is also described a small area PID feedback network using a high resistive pMOS pseudo-resistor and small integration capacitances for programmable gain control throughout parasitic insensitive nMOS switches. Simulation results show that it achieves...
Several diode designs to satisfy specific needs of quick response and power, this paper examines the arguments of a design that is economical in terms of manufacturing process but to improve the requirements of the few devices on the market with these characteristics (reverse breakdown voltage of 600V and reverse recovery time of 35ns). The design is tested using finite elements-through simulation...
A forward and a reverse current bias study has been achieved in the design of GaAs diodes using the close space vapour deposition (CSVT) technique in order to find out the dominant current mechanisms. The diodes were characterized over a temperature range from 94 K to 293 K. The soundness of the dominant current in the range 1?10-7 to 1?10-2 A with an internal field emission current model of the form...
In this paper is fully proved the behavior of the Volterra Series through a Memory-Polynomial Model (MPM) excited by QAM Input and implemented in an Radio Frequency Satellite Link (RFSL). Several sequences of 4-, 8-, 16-, 32 and 64-QAM Inputs were introduced to the MPM. The MPM as special truncation of the Volterra Series showed a orrect behaviour for each QAM Input and the RFSL was able to stabilize...
An algorithm is presented that is able to detect the regions which correspond to the single isolated human insulin crystals in a group of previously segmented foreground regions. It is based on a single nearest prototype rule, which requires the knowledge of a class prototype for each class of segmented foreground regions. Each class prototype represents a 7-dimensional mean vector of rotation, translation...
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