scholarly journals Research on Virtual Assembly and Performance Simulation of Electric Bicycle

2017 ◽  
Author(s):  
Shang Liu ◽  
Lin-Fang Dong
Keyword(s):  
Virtual Assembly ◽  
Performance Simulation ◽  
Electric Bicycle ◽  
And Performance

Automatic Parametric Modeling From Non-Feature Based Designs for Additive Manufacturing

2021 ◽  
Author(s):  
Xinyi Xiao ◽  
Byeong-Min Roh
Keyword(s):  
Additive Manufacturing ◽  
3D Models ◽  
Parametric Modeling ◽  
Parametric Models ◽  
Performance Simulation ◽  
Cad Modeling ◽  
3D Cad ◽  
Feature Based ◽  
And Performance ◽  
The Given

Abstract The integration of Topology optimization (TO) and Generative Design (GD) with additive manufacturing (AM) is becoming advent methods to lightweight parts while maintaining performance under the same loading conditions. However, these models from TO or GD are not in a form that they can be easily edited in a 3D CAD modeling system. These geometries are generally in a form with no surface/plane information, thus having non-editable features. Direct fabricate these non-feature-based designs and their inherent characteristics would lead to non-desired part qualities in terms of shape, GD&T, and mechanical properties. Current commercial software always requires a significant amount of manual work by experienced CAD users to generate a feature-based CAD model from non-feature-based designs for AM and performance simulation. This paper presents fully automated shaping algorithms for building parametric feature-based 3D models from non-feature-based designs for AM. Starting from automatically decomposing the given geometry into “formable” volumes, which is defined as a sweeping feature in the CAD modeling system, each decomposed volume will be described with 2D profiles and sweeping directions for modeling. The Boolean of modeled components will be the final parametric shape. The volumetric difference between the final parametric form and the original geometry is also provided to prove the effectiveness and efficiency of this automatic shaping methodology. Besides, the performance of the parametric models is being simulated to testify the functionality.

Use of Hydrogen and Fuel Cells for Refrigerated Transport

2015 ◽  
pp. 881-924
Author(s):  
Raquel Garde ◽  
Sindia Casado ◽  
Fernando Jimenez ◽  
Gabriel Garcia-Naveda ◽  
Monica Aguado
Keyword(s):  
Fuel Cells ◽  
Refrigeration System ◽  
Road Transportation ◽  
Performance Simulation ◽  
The Road ◽  
Operation Costs ◽  
Transportation Sector ◽  
Refrigerated Transport ◽  
Reduced Costs ◽  
And Performance

Benchmark refrigeration systems in the road transportation sector are powered by diesel, having operation costs of up to 6,000 €/y with the consequent increase of the goods cost. This chapter presents an alternative refrigeration system based on fuel cells (FC) and hydrogen as fuel, with higher efficiency, reduced costs and independent of diesel price fluctuations. Examples of the energy load profiles impact on the FC sizing, H2 consumption and system autonomy are presented as well as a description of the FC model and performance simulation results. The economical feasibility of this new refrigeration system linked to renewable energies is also analyzed and an economical assessment for different scenarios is presented.

The Research and Performance Simulation of C-WQPSK Modulation

2012 ◽  
Vol 482-484 ◽  
pp. 771-775 ◽  
Author(s):  
Guo Hui Wu ◽  
Bao Jun Chu ◽  
Ji Yang Dai
Keyword(s):  
Power Spectrum ◽  
Engineering Application ◽  
Pulse Signal ◽  
Modulation Method ◽  
Carrier Wave ◽  
Performance Simulation ◽  
Numerical Tests ◽  
Decline Rate ◽  
And Performance ◽  
Ber Performance

By modifying the modulated waveform, a new communication modulation method, which is called C-WQPSK, is proposed in this paper. This method based on direct carrier QPSK, didn’t consider baseband pulse signal, and redesigned the modulating waveform, its phase angle jump and jump to change duration time all can be changed. Results of the numerical tests indicate that, the method is correctness and effectiveness. Compared with direct carrier QPSK, the method can keep the BER performance, meanwhile, power spectrum decline rate, the energy of modulated carrier wave, and anti-interference ability are improved and enhanced, so it owns high theory significance and engineering application value.

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