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This work presents the development of a breathalyzer to be used inside a car. The breathalyzer constantly monitors the alcohol level in the ambient into a car, which is produced by the breath of the driver, principally. The breathalyzer uses an alcohol sensor MQ-3, a closed-normally electromagnetic relay to obstruct the ignition of the car, a global position system (GPS) module, a global system for...
In this paper, two different filter structures for smart antennas based on a convex combination of independent transversal adaptive sub-filters are analyzed. The first structure combines the least-mean-squares (LMS) and the augmented complex least-mean-squares (ACLMS) algorithms, whereas the second one uses the recursive least-squares (RLS) and the complex dual least-mean-squares (CDU-LMS) algorithms...
A relative simple approach based on the computation of the area of a parametric curve produced by the 2D space representation of a set of parametric experimental functions defined by the signals of only two active EEG electrodes of a low cost neuroheadset (Emotiv EPOC) is proposed on this paper for the fast recognition of eye winks activity as control commands. This approach together with the use...
In this paper we are interested in knowing, which features provide useful information for recognizing a gesture or an action, and how the set of selected characteristics impact the accuracy of detection. Then we define a large set of possible features, which are angles calculated from the joints of the skeleton provided by the kinect device. Our contribution is to propose an algorithm: Reduction of...
In this paper, the results of the simulation of a fuzzy controller applied to a Vertical Takeoff and Landing (VTOL) are presented. For this design, the ground aerodynamic effect is considered to stablish the member functions and the linguistic rules for the fuzzy system. A direct fuzzy controller with an integrator stage structure is proposed in order to enhance the error in steady-state and obtain...
The Solid State Lighting systems have become the best option to replace old lighting technologies. The COB packaging technology is suitable due to its high flexibility during design stages. Nevertheless, the high integration levels increases the number of LED-Chips, in addition electrical power increases, thus temperature rise considerably. Small-signal LED models are limited due to the few technical...
Cardiac arrhythmia detection and classification is of outmost importance for early diagnosis to reduce significantly the rates of morbidity and mortality of patients with heart disease. In particular for patients with silent cardiac symptomatology, the advances in wearable sensing technology offer a promising solution for on-line, real-time detection of intermittent tachyarrhythmia events that otherwise...
Guitar audio signal classification has its main application in chord transcription and guitar tutoring systems. This paper proposes a method to classify chords from an electric guitar. The method performs Wavelet Decomposition in order to split the signal in approximation coefficients and details, and then, those approximation coefficients below a threshold are removed. This filtered signal is reconstructed...
Time synchronization (TS) represents an important necessity for many industries in fields such as communications, manufacturing, and power systems related to electrical networks, microgrids, and renewable energies, among others, because it can ensure that cooperating processes or systems can interoperate correctly; further, the scheduling of specific tasks through a timestamp can be done. Among different...
This article analyzes a resonant inverter to feed an ozone cell. The resonant inverter consists of a full bridge and a resonant tank to generate a high frequency sine wave. The article proposes the study of three resonant tanks in order to determine which has the greatest gain in current and voltage. The resonant tanks to be analyzed are the resonant tank RSE series, parallel resonant tank transformer...
This paper presents a full approach to outcomes due to the measurement of distance between two points in space, taking as reference XBee signal's (radio waves) attenuation as they travel from point A to B. XBee modules are able to communicate with each other, creating networks which consist of a coordinator, routers and end devices; allowing information flow across the network members. As bits voyage,...
The aim of this study is to analyze and compare three droop controller schemes to regulate the operation of a microgrid. Three droop control schemes are selected because of their capability to regulate voltage, frequency and power sharing without using communication links and complex measurement systems. Specifically, the conventional droop controller and two of its variants are compared, the angular...
VSC based converters are among the most preferred interfaces to perform the interconnection, especially for integration of distributed energy sources, active filtering, and power supply applications. Hysteresis current control presents very attractive characteristics for these applications such as: robust control, fast dynamical response, built-in over-current protection and simple and reliable implementation...
Heat exchange systems are widely used in industry to transfer thermal energy from one body to another with a definite purpose, as in the distillation process. However, it is essential to have an adequate control system to ensure the proper process operation. This paper presents the modelling, simulation and implementation of a controlled actuator for a distillation column boiler. The proposed actuator...
In this paper, based on the full order model and using passivity approach, a robust control is designed for synchronous generator connected to a infinite bus. To estimate the unmeasurable state variables and the operation point, two observers are designed using generalized high order sliding mode control algorithm. The robustness of the proposed control scheme is demonstrated by the stability analysis...
Studies relating to chaotic circuits have received considerable attention due to a variety of chaos-based applications in science and engineering. This work deals with a novel simple chaotic generator with a single signum nonlinearity. The proposed chaotic generator is simple with only ten elements and can be realized easily. The behavior of such system is discovered through an implementation of the...
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