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Lithium-ion (Li-ion) battery faults are potentially hazardous to battery health, safety and performance. Thermal fault mechanisms represent a critical subset of such failures. To ensure safety and reliability, battery management systems must have the capability of diagnosing these thermal failures. We present a Partial Differential Equation (PDE) model-based scheme for diagnosing thermal faults in...
This paper seeks to derive insight on battery charging control using electrochemistry models. Directly using full order complex multi-partial differential equation (PDE) electrochemical battery models is difficult and sometimes impossible to implement. This paper develops an approach for obtaining optimal charge control schemes, while ensuring safety through constraint satisfaction. An optimal charge...
A hypothesis test based methodology for comparing propagation loss as reported by Modeling and Simulation (M&S) and a real life Wireless Sensor Network (WSN) platform is proposed. The methodology is based on hypothesis testing and statistical evaluation of experimental and simulation data. A software tool for verification of the simulation results is developed in order to automate the process...
Complex multi-partial differential equation (PDE) electrochemical battery models are characterized by parameters that are often difficult to measure or identify. This parametric uncertainty influences the state estimates of electrochemical model-based observers for applications such as state-of-charge (SOC) estimation. This paper develops a sensitivity-based interval observer that maps bounded parameter...
Ablation of sources identified by dominant frequency (DF) or phase analyses in patients with atrial fibrillation (AF) is proposed as a therapy to terminate the arrhythmia. The aim of this study was to evaluate noninvasive identification of AF sources by solving the inverse problem. Realistic mathematical models of atria and torso anatomy with different DF patterns of AF were used. For these models...
It has been recently shown that the presence of nanoscatterers up to a certain density, homogeneously distributed in gain media, instead of being detrimental to conventional two-mirror cavity laser efficiency and directionality, may result in an increase of the output energy due to an enlargement in the effective optical path. Here we present a theoretical model for the stimulated emission in very...
A cross-adaptive mixing device has been developed for the purpose of optimizing the gain levels of a live audio mixture. The method aims to achieve optimal mixing levels by optimizing the ratios between the loudness of each individual input channel and the overall loudness contained in a stereo mix. In order to evaluate the amount of loudness of each channel in real-time, accumulative statistical...
This paper is focused on the analysis of a Kalman filter performance when introduced in the current control loop of a distributed generator connection inverter. The goal is to use this kind of filter to reduce the harmonic content of the currents injected by this equipment in their point of common coupling. The study has been performed by means of simulation, using Matlab-Simulink, and by implementing...
This paper describes a fixed maximum power point analog control used in a step-down pulse width modulated power converter. The DC/DC converter drives a DC motor used in small water pumping installations, without any electric storage device. The power supply is provided by PV panels working around their maximum power point, with a fixed operating voltage value. The control circuit implementation is...
Interactive software demonstrations and computer-based exercises are often applied in signal processing education to examine concepts such as complex numbers, signal representation, sampling theory, and digital filter specification. While engineering software development environments such as National Instruments LabVIEW simplify the creation of such software, it's clear that some do a better job of...
Air management process in a turbocharged diesel engine is a multivariable, highly coupled nonlinear system with fast dynamics. Because of this, control algorithms with reasonably low computation times (enabling real time application) must be used. Furthermore, testing of new algorithms on a real engine is expensive. Therefore, a detailed non-linear engine simulator based on a first principles model...
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