Overall Performance Analysis–Oriented Aerodynamic Configuration Optimization Design for Hypersonic Vehicles

2017 ◽  
Vol 54 (5) ◽  
pp. 1015-1026 ◽  
Author(s):  
Fan Deng ◽  
Zi-han Jiao ◽  
Jun Chen ◽  
Dong Zhang ◽  
Shuo Tang
Keyword(s):  
Performance Analysis ◽  
Optimization Design ◽  
Hypersonic Vehicles ◽  
Configuration Optimization ◽  
Overall Performance ◽  
Aerodynamic Configuration

Study on Hydraulic Circuit Simulation Based on MSC·EASY5 for the Arm of Excavator

2011 ◽  
Vol 291-294 ◽  
pp. 2281-2286
Author(s):  
Li Rong Wan ◽  
Yun Qing Gong ◽  
Cheng Long Wang
Keyword(s):  
Performance Analysis ◽  
Hydraulic System ◽  
Optimization Design ◽  
Circuit Simulation ◽  
New Product ◽  
Hydraulic Cylinder ◽  
Hydraulic Circuit ◽  
Graphical Modeling ◽  
Simulation Based ◽  
Overall Performance

In this paper, a hydraulic excavator is used as an example, and a model of the hydraulic circuit of the excavator arm is established using the graphical modeling method of EASY5. Through the simulation and analysis of the results, it can be seen that the simulation results can accurately simulate the dynamic characteristics of actual hydraulic circuit, and show the variation of the pressure in the hydraulic cylinder chambers. It not only provides a basis for the system performance analysis and the further improvement, but also provides a new method for the optimization design and overall performance analysis of the engineering machinery hydraulic system. And it also provides a new idea of design for the development of new product.

Performance analysis and optimization design of an axial-flow vane separator for supercritical CO2 (sCO2 )-water mixtures from geothermal reservoirs

2019 ◽  
Vol 43 (6) ◽  
pp. 2327-2342 ◽  
Author(s):  
Zongliang Qiao ◽  
Youfei Tang ◽  
Lei Zhang ◽  
Chunjian Pan ◽  
Carlos E. Romero ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Supercritical Co2 ◽  
Optimization Design ◽  
Axial Flow ◽  
Geothermal Reservoirs

scholarly journals On the Comparative Performance Analysis of PAPR Reduction Techniques in OFDM System

2015 ◽  
Vol 43 ◽  
pp. 39-49
Author(s):  
Md. Ibrahim Khalil ◽  
Sabbir Ahmed
Keyword(s):  
Performance Analysis ◽  
Orthogonal Frequency Division Multiplexing ◽  
Average Power ◽  
Papr Reduction ◽  
Hadamard Transform ◽  
Ofdm Systems ◽  
Comparative Performance ◽  
Computational Overhead ◽  
Reduction Techniques ◽  
Overall Performance

Selected Mapping (SLM) and Partial Transmit Sequence (PTS) are two very well-known Peak-to-average Power Ratio (PAPR) reduction techniques for Orthogonal Frequency Division Multiplexing (OFDM) systems. Both these schemes show good PAPR reduction capabilities. However, for any PAPR reduction technique, the nature of spectral occupancy and the associated computational complexity also need to be taken into account when the overall performance is considered. In this paper, our goal is to perform a comparative performance analysis of SLM and PTS techniques by considering these three parameters, i.e. PAPR reduction, computational overhead and spectral compactness. For this, we at first look for the optimum values in terms of number of sequences in SLM and no. of sub-blocks in PTS. And then based on this finding, we perform performance analysis. Our finding shows that, PTS outperforms SLM when compared on the parameters mentioned above. Finally, to explore the feasibility of further improvement, we apply Walsh-Hadamard Transform to PTS scheme and show that it further reduces PAPR and improves spectral compactness.

Study on the Design and Analysis of Spindle System of NС Machine Tools Based on Digital Design

2012 ◽  
Vol 522 ◽  
pp. 668-672
Author(s):  
Hui Juan Sun ◽  
Guo Fu Yin ◽  
Liang Mi ◽  
Yang Yin
Keyword(s):  
Performance Analysis ◽  
Resource Sharing ◽  
Machine Tools ◽  
Optimization Design ◽  
Structure Design ◽  
Digital Design ◽  
Element Analysis ◽  
Development Platform ◽  
Nc Machine ◽  
And Performance

Aiming at these problems of complicated analysis, high repeated rate and resource sharing in the process of the NC machine tools design and performance analysis, a development platform is built to integrate the structure design, performance analysis, optimization of spindle and resource sharing. The platform includes digital design, 3D entity modeling and virtual assembly, finite element analysis and optimization, and dynamic simulation module. Each module can normally operate and exchange data by means of coordinating the interface between modules. The experiment shows that the developed system could effectively improve the efficiency of design and analysis of spindle, and could provide reference for the optimization design and the actual production manufacturing.

Sign in / Sign up

Export Citation Format

Share Document