
L. Felipe BlázquezUniversity of Leon | UNILEON · Department of Electric, Systems and Automatics Engineering
L. Felipe Blázquez
Doctor of Engineering
About
15
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Introduction
Publications
Publications (15)
To detect radiation sources in containers, radiation portal monitors (RPMs) are normally used. Among the various types of RPM, polyvinyl toluene (PVT) monitors are the most widely used, thanks to their lower cost. However, they provide only low resolution when energy spectra are measured. For this reason, it is currently not possible to identify wh...
Radiation portal monitors (RPMs) are an effective mean of detecting radioactive material inside cargo containers. Polyvinyl toluene (PVT) monitors are the most broadly extended mainly due to their cost. The drawback when compared to other detectors is the lower resolution of the measured energy spectra. This low resolution hinders the use of spectr...
This paper describes a virtual online monitoring of the non-measurable conditions inside a real-life industrial reactor for the production of polyvinyl acetate. These non-measurable conditions are the conversion, the polymerization rate, the viscosity and the solids content. The goal of this paper is to use them for control strategies, which can be...
Even the simple run of a medium size system dynamics model can be a cumbersome process, since the uncertainty of the parameters forces the modeler to consider many runs before being confident of how the model behaves. System dynamics simulation packages include some analysis tools, but there is a lack of a commonly used analysis tool such as fuzzy...
This paper describes a software application for traffic sign recognition (TSR). The application works in four stages. First, an image preprocessing step and the detection of regions of interest (ROIs), which involves a series of steps that include transforming the image to grayscale and applying edge detection by the Laplacian of Gaussian (LOG) fil...
This article describes a fault detection method, based on the parity equations approach, to be applied to nonlinear systems. The input–output nonlinear model of the plant, used in the method, has been obtained by a neural fuzzy inference architecture and its learning algorithm. The proposed method is able to detect small abrupt faults, even in syst...
This paper describes the effects of input saturation on the performance of a model-based fault detection method based on the input-output parity equation approach. For this purpose, the level control of a chemical reactor has been chosen as the control process to be analyzed, where the saturation of the dynamic process is due to the inflow control...
The uncertainty of system models, the presence of noise and the stochastic behaviour of several variables reduce the reliability and robustness of the fault diagnosis methods. To tackle these kinds of problems, this paper presents a decision-making module based on fuzzy logic for model-based fault diagnosis applications. Fuzzy rules use the concept...
This paper describes an application of the parity equation method to a real nonlinear system with saturation. This nonlinear system is an industrial pilot plant, and the water level control of the pressurized reactor is the control process implemented in this pilot plant. The saturation of the dynamic process is due to the inflow control valve. The...
Resumen Esta comunicación presenta una visión general de las principales técnicas de detección y diagnóstico de fallos basadas en el modelo de la planta que se aplican a los sistemas dinámicos no lineales. Con el objetivo de que el trabajo quede lo más completo posible, se citan en la introducción otros métodos de diagnóstico existentes, y se dedic...