Optimal design of three-dimensional FIR digital filters. Design method by linear programming and reduction of computations by exploiting symmetries

1989 ◽  
Vol 72 (1) ◽  
pp. 55-65 ◽  
Author(s):  
Tatsuo Higuchi ◽  
Makoto Ohki ◽  
Masayuki Kawamata
Keyword(s):  
Linear Programming ◽  
Optimal Design ◽  
Digital Filters ◽  
Design Method ◽  
Three Dimensional ◽  
Fir Digital Filters

scholarly journals Optimal Design of Multi-section Proportional Directional Valve Throttle Grooves with Artificial Neural Networks

2018 ◽  
Vol 237 ◽  
pp. 03003 ◽  
Author(s):  
Xiaolu Zhang ◽  
Anlin Wang ◽  
Jiangwei Tang
Keyword(s):  
Optimal Design ◽  
Design Method ◽  
Structural Parameters ◽  
Three Dimensional ◽  
Flow Stability ◽  
Complex Flow ◽  
Physical Test ◽  
Flow Field Characteristics ◽  
Structure Boundary ◽  
Proportional Directional Valve

This paper presents a method for design multi-section proportional directional valve Throttle grooves with ANN method, which aims at getting a better flow stability. There exists a coupling matter during the opening and closing process between the throttling notches, so that it’s difficult to parameterize the complex flow field characteristics Cd and the structure boundary of the spool grooves. However, in this paper, an ANN was built with data from CFD results, while the typical structural parameters (U type, the O-type and C-type), operating parameters was input vectors, the discharge coefficient as output vectors. Meanwhile, all of the needed data is taken from the three-dimensional CFD analysis, which are organized properly and verified by a bench scale test on a rig. Then, with throttling stiffness as optimization objective to evaluate flow stability, an optimal design process is carried out to optimize to optimize the structure of coupling grooves with ANN models and genetic algorithm. Ultimately, the optimized structure is verified better by the physical test on test rig, therefore, the significance of design method is proved.

A new constraint model for optimal design of constrained FIR digital filters

2017 ◽  
Author(s):  
Huoping Yi ◽  
Yichao Ling ◽  
Hailong Meng ◽  
Jiangli Niu ◽  
Qiong Wu ◽  
...  
Keyword(s):  
Optimal Design ◽  
Digital Filters ◽  
Fir Digital Filters ◽  
Constraint Model
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