Research and Realization of Hardware Back-Propagation Neural Network Based on FPGA

2013 ◽  
Vol 333-335 ◽  
pp. 2469-2474
Author(s):  
Fei Guo ◽  
Xiao Luo
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Back Propagation ◽  
Variable Structure ◽  
Maximum Error ◽  
Back Propagation Neural Network ◽  
Neural Network Modeling ◽  
Network Algorithm ◽  
Neural Network Algorithm ◽  
Timing Simulation

In order to meet the requirements of real-time and embedded of industrial field, a reconfigurable Back-Propagation neural network based on FPGA has been implemented on Xilinx's Spartan-3E (XC3S250E) chip which has 250000 gate. First the optimal network structure and weights were gotten by a variable structure of BP neural network algorithm. Then an improved hardware approaching method of excitation function was put forward, and the maximum error was 1.58% by simulation and comparative analysis on the error. Finally hardware co-imitation and timing simulation was token based on a reasonable choice of data accuracy, and then the hardware BP neural network algorithm was been downloaded and implemented on FPGA. This method has better accuracy and speed, it is an effective method of BP neural network modeling based on hardware, and lays the foundation for the hardware realization of other neural network and embedded image processing.

scholarly journals RESEARCH ON ATHLETES’ PSYCHOLOGICAL REGULATION ABILITY BASED ON BACK PROPAGATION (BP) NEURAL NETWORK ALGORITHM

2021 ◽  
Vol 27 (spe2) ◽  
pp. 83-86
Author(s):  
Yun Tan ◽  
Guoqing Zhang
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Psychological Control ◽  
Back Propagation ◽  
Rotation Matrix ◽  
Psychological State ◽  
Advantages And Disadvantages ◽  
Network Algorithm ◽  
Neural Network Algorithm ◽  
Game State

ABSTRACT Athletes’ psychological control ability directly affects competitions. Therefore, it is necessary to supervise the athletes’ game psychology. Athletes’ game state supervision model is constructed through the facial information extraction algorithm. The homography matrix and the calculation method are introduced. Then, two methods are introduced to solve the rotation matrix from the homography matrix. After the rotation matrix is solved, the method of obtaining the facial rotation angle from the rotation matrix is introduced. The two methods are compared in the simulation data, and the advantages and disadvantages of each algorithm are analyzed to determine the method used in this paper. The experimental results show that the model prediction accuracy reaches 70%, which can effectively supervise the psychological state of athletes. This research study is of great significance to improve the performance of athletes in competitions and improve the application of back propagation (BP) neural network algorithm.

scholarly journals Porosity Prediction of Granular Materials through Discrete Element Method and Back Propagation Neural Network Algorithm

2020 ◽  
Vol 10 (5) ◽  
pp. 1693
Author(s):  
Yu Liu ◽  
Miaomiao Li ◽  
Peifeng Su ◽  
Biao Ma ◽  
Zhanping You
Keyword(s):  
Neural Network ◽  
Granular Material ◽  
Granular Materials ◽  
Particle Shape ◽  
Back Propagation ◽  
Discrete Element ◽  
Back Propagation Neural Network ◽  
Network Algorithm ◽  
Neural Network Algorithm ◽  
Bpnn Model

Granular materials are used directly or as the primary ingredients of the mixtures in industrial manufacturing, agricultural production and civil engineering. It has been a challenging task to compute the porosity of a granular material which contains a wide range of particle sizes or shapes. Against this background, this paper presents a newly developed method for the porosity prediction of granular materials through Discrete Element Modeling (DEM) and the Back Propagation Neural Network algorithm (BPNN). In DEM, ball elements were used to simulate particles in granular materials. According to the Chinese specifications, a total of 400 specimens in different gradations were built and compacted under the static pressure of 600 kPa. The porosity values of those specimens were recorded and applied to train the BPNN model. The primary parameters of the BPNN model were recommended for predicting the porosity of a granular material. Verification was performed by a self-designed experimental test and it was found that the prediction accuracy could reach 98%. Meanwhile, considering the influence of particle shape, a shape reduction factor was proposed to achieve the porosity reduction from sphere to real particle shape.

Hysteresis modeling of piezoelectric actuator using particle swarm optimization-based neural network

2020 ◽  
Vol 234 (23) ◽  
pp. 4695-4707
Author(s):  
Quan Zhang ◽  
Xin Shen ◽  
Jianguo Zhao ◽  
Qing Xiao ◽  
Jun Huang ◽  
...  
Keyword(s):  
Neural Network ◽  
Particle Swarm Optimization ◽  
Moving Average ◽  
Back Propagation ◽  
Particle Swarm ◽  
Piezoelectric Actuators ◽  
Back Propagation Neural Network ◽  
Swarm Optimization ◽  
Network Algorithm ◽  
Neural Network Algorithm

Piezoelectric actuators have been received much attention for the advantages of high precision, no wear and rapid response, etc. However, the intrinsic hysteresis behavior of the piezoelectric materials seriously degraded the output performance of piezoelectric actuators. In this paper, to decrease such nonlinear effects and further improve the output performances of piezoelectric actuators, a modified nonlinear autoregressive moving average with exogenous inputs model, which could describe the rate-dependent hysteresis features of piezoelectric actuators was investigated. In the experiment, the different topologies of the proposed back propagation neural network algorithm were compared and the optimal topology was selected considering both the tracking precision and the structure complexity. The experimental results validated that the modified nonlinear autoregressive moving average with exogenous inputs model featured the hysteresis characteristics description ability with high precision, and the predicted motion matched well with the real trajectory. Then, the initial parameters of the back propagation neural network algorithm were further optimized by particle swarm optimization algorithm. The experimental results also verified that the proposed model based on particle swarm optimization–back propagation neural network algorithm was more accurate than that identified through the conventional back propagation neural network algorithm, and has a better predicting performance.

scholarly journals A study of waterborne diseases during flooding using Radarsat-2 imagery and a back propagation neural network algorithm

2013 ◽  
Vol 6 (4) ◽  
pp. 289-307 ◽  
Author(s):  
Peera Yomwan ◽  
Chunxiang Cao ◽  
Preesan Rakwatin ◽  
Warawut Suphamitmongkol ◽  
Rong Tian ◽  
...  
Keyword(s):  
Neural Network ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Waterborne Diseases ◽  
Network Algorithm ◽  
Neural Network Algorithm
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