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Your search keyword '"Deng, Xianzhi"' showing total 19 results
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19 results on '"Deng, Xianzhi"'

6. An FPGA-Implemented Antinoise Fuzzy Recurrent Neural Network for Motion Planning of Redundant Robot Manipulators

Author

Zhang, Zhijun, He, Haotian, and Deng, Xianzhi

Abstract

When a robot completes end-effector tasks, internal error noises always exist. To resist internal error noises of robots, a novel fuzzy recurrent neural network (FRNN) is proposed, designed, and implemented on field-programmable gated array (FPGA). The implementation is pipeline-based, which guarantees the order of overall operations. The data processing is based on across-clock domain, which is beneficial for computing units’ acceleration. Compared with traditional gradient-based neural networks (NNs) and zeroing neural networks (ZNNs), the proposed FRNN has faster convergence rate and higher correctness. Practical experiments on a 3 degree-of-freedom (DOs) planar robot manipulator show that the proposed fuzzy RNN coprocessor needs 496 lookup table random access memories (LUTRAMs), 205.5 block random access memories (BRAMs), 41384 lookup tables (LUTs), and 16743 flip-flops (FFs) of the Xilinx XCZU9EG chip.

Published
2024
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9. Modeling and Analysis of Thermal Elastohydrodynamic Lubrication Characteristic of Asymmetric Gear with a Small Number of Teeth

Author

Deng Xianzhi

Subjects
Asymmetric gear, Small number of teeth, Thermal elastohydrodynamic lubrication, Overrelaxation iteration, Change regulation, Model, Mechanical engineering and machinery, TJ1-1570
Abstract

The asymmetric gear with a small number of teeth has the advantages of small size,large transmission ratio and high load capacity and so on,it is more and more widely used in various fields. Under good lubrication condition,the parameter change has important influence on the performance of thermal elastohydrodynamic lubrication characteristic of asymmetric gear with a small number of teeth,and has an important influence on the transmission efficiency and service life of gear. The model of asymmetric gear with a small number of teeth is built based on the Hertz contact theory and thermal elastohydrodynamic lubrication theory. The differential dispersion of the equation set is carried out through finite difference method,and by using the Newton-Raphson method,the Reynolds equation is solved to get complete numerical solution,the distribution of oil film pressure and film thickness are obtained. For solving EHL equations by overrelaxation iterative method,the thermal elastohydrodynamic lubrication characteristics in asymmetric gear with a small number of teeth meshing line of five special points are got,the change regulation of pressure angle,variable coefficient,between the load and the speed and the oil film thickness,pressure and temperature are analyzed. The results show that the maximum temperature appeared at the meshing point,the temperature of oil film at the nodes close to the steady state of lubricating oil temperature,and the change trend of the oil film temperature and oil film pressure is conformity.

Published
2016
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