Harmonic Detection for Shunt Active Power Filter Using ADALINE Neural Network

This paper presents an efficient harmonic detection for real-time generation of the reference current fed to a shunt active power filter using the ADALINE neural network. This proposed method is a single layer with 101 nodes generating the coefficients referred to as weights of the reference current model. It effectively overcomes the drawback of the current technology, which is instantaneous power theory (PQ). The proposed method was implemented on the TMS320F28335 DSP board and tested against MATLAB with Simulink as a hardware-in-loop (HIL) structure. This method gives a good performance by producing a precise reference current in a short period with uncomplicated calculation. It also efficiently can eliminate individual harmonic current. The achieved percentage of total harmonic distortion (%THD) in the current is reduced following the IEEE standard, while the power factor can be maintained to unity.

COMPARAÇÃO ENTRE AS REDES NEURAIS ADALINE E PERCEPTRON UTILIZANDO O CONJUNTO DE DADOS IRIS

Initially, neural networks were developed with the objective of creating a computational system that models the functioning of the human brain, however they started to be used to solve specific tasks. Adaline and Perceptron are two neural networks that calculate an input function using a set of adaptive weights and a bias, despite their similarities, it is known that the Adaline neural network converges to a result more quickly than the Perceptron neural network. This work was designed as a didactic exercise, in order to present how such conclusions are obtained, using the IRIS database as data for classification and training. Throughout the work, the programming languages Processing, was used to develop neural networks, and Python for visual presentation of results. The results found show the high performance of the Adaline neural network over the Perceptron, showing the database classes that can be linearly separated and those that cannot, the metric used to evaluate the performance between the neural networks is defined by the percentage of correct answers in the data classifications. Adaline showed the best performance in the classification for length and width of the petal between the Iris-setosa and Iris-virginica classes among all the other classifications.

Logic Learning in Adaline Neural Network

In this paper, Adaline Neural Network (ADNN) has been explored to simulate the actual signal processing between input and output. One of the drawback of the conventional ADNN is the use of the non-systematic rule that defines the learning of the network. This research incorporates logic programming that consists of various prominent logical representation. These logical rules will be a symbolic rule that defines the learning mechanism of ADNN. All the mentioned logical rule are tested with different learning rate that leads to minimization of the Mean Square Error (MSE). This paper uncovered the best logical rule that could be governed in ADNN with the lowest MSE value. The thorough comparison of the performance of the ADNN was discussed based on the performance MSE. The outcome obtained from this paper will be beneficial in various field of knowledge that requires immense data processing effort such as in engineering, healthcare, marketing, and business.

Research on Model Predictive Control of IPMSM Based on Adaline Neural Network Parameter Identification

This paper reports the optimal control problem on the interior permanent magnet synchronous motor (IPMSM) systems. The control performance of the traditional model predictive control (MPC) controller is ruined due to the parameter uncertainty and mismatching. In order to solve the problem that the MPC algorithm has a large dependence on system parameters, a method which integrates MPC control method and parameter identification for IPMSM is proposed. In this method, the d-q axis inductances and rotor permanent magnet flux of IPMSM motor are identified by the Adaline neural network algorithm, and then, the identification results are applied to the predictive controller and maximum torque per ampere (MTPA) module. The experimental results show that the optimized MPC control proposed in this paper has a good steady state and robust performance.