Single neural adaptive controller and neural network identifier based on PSO           algorithm for spherical actuators with 3D magnet array

In this study, a numerical and empirical scheme for increasing cooling tower performance is developed by combining the particle swarm optimization (PSO) algorithm with a neural network and considering the packing’s compaction as an effective factor for higher accuracies. An experimental setup is used to analyze the effects of packing compaction on the performance. The neural network is optimized by the PSO algorithm in order to predict the precise temperature difference, efficiency, and outlet temperature, which are functions of air flow rate, water flow rate, inlet water temperature, inlet air temperature, inlet air relative humidity, and packing compaction. The effects of water flow rate, air flow rate, inlet water temperature, and packing compaction on the performance are examined. A new empirical model for the cooling tower performance and efficiency is also developed. Finally, the optimized performance conditions of the cooling tower are obtained by the presented correlations. The results reveal that cooling tower efficiency is increased by increasing the air flow rate, water flow rate, and packing compaction.

Download Full-text

Position Control of Ultrasonic Motor Using IMC-PID Combined with Tribes Type NN Algorithm

Advanced Engineering Forum ◽

10.4028/www.scientific.net/aef.2-3.12 ◽

2011 ◽

Vol 2-3 ◽

pp. 12-17

Author(s):

Sheng Lin Mu ◽

Kanya Tanaka

Keyword(s):

Neural Network ◽

Particle Swarm Optimization ◽

Pid Control ◽

Position Control ◽

Back Propagation ◽

Particle Swarm ◽

Pso Algorithm ◽

Ultrasonic Motor ◽

Swarm Optimization

In this paper, we propose a novel scheme of IMC-PID control combined with a tribes type neural network (NN) for the position control of ultrasonic motor (USM). In this method, the NN controller is employed for tuning the parameter in IMC-PID control. The weights of NN are designed to be updated by the tribes-particle swarm optimization (PSO) algorithm. This method makes it possible to compensate for the characteristic changes and nonlinearity of USM. The parameter-free tribes-PSO requires no information about the USM beforehand; hence its application overcomes the problem of Jacobian estimation in the conventional back propagation (BP) method of NN. The effectiveness of the proposed method is confirmed by experiments.

Download Full-text

State feedback linearisation-based neural network adaptive controller for a class of uncertain SISO non-linear systems

International Journal of Modelling Identification and Control ◽

10.1504/ijmic.2010.035278 ◽

2010 ◽

Vol 11 (1/2) ◽

pp. 44

Author(s):

M. Chemachema ◽

K. Belarbi

Keyword(s):

Neural Network ◽

Linear Systems ◽

State Feedback ◽

Adaptive Controller ◽

Non Linear ◽

Non Linear Systems

Download Full-text

WNN Model Based on Particle Swarm Optimization for Fault Diagnosis in Analog Circuit

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.427-429.1048 ◽

2013 ◽

Vol 427-429 ◽

pp. 1048-1051

Author(s):

Xu Sheng Gan ◽

Hao Lin Cui ◽

Ya Rong Wu

Keyword(s):

Neural Network ◽

Particle Swarm Optimization ◽

Fault Diagnosis ◽

Convergence Rate ◽

Analog Circuit ◽

Particle Swarm ◽

Pso Algorithm ◽

Wavelet Neural Network ◽

Swarm Optimization ◽

Fast Convergence Rate

In order to diagnose the fault in analog circuit correctly, a Wavelet Neural Network (WNN) method is proposed that uses the Particle Swarm Optimization (PSO) algorithm to optimize the network parameters. For the improvement of convergence rate in WNN based on PSO algorithm, a compressing method in research space is introduced into the traditional PSO algorithm to improve the convergence in WNN training. The simulation shows that the proposed method has a good diagnosis with fast convergence rate for the fault in analog circuit.

Download Full-text