Application Capturing and Performance Estimation in an Holistic Design Environment

2009 ◽  
Author(s):  
Muhammad Rashid ◽  
Bernard Pottier
Keyword(s):  
Performance Estimation ◽  
Design Environment ◽  
Holistic Design ◽  
And Performance

scholarly journals Characterization and Performance Estimation of a MEMS Spirometer

2016 ◽  
Vol 168 ◽  
pp. 1020-1023 ◽  
Author(s):  
Sahar Habibiabad ◽  
Yeşim Serinağaoğlu Doğrusöz ◽  
Mustafa İlker Beyaz
Keyword(s):  
Performance Estimation ◽  
And Performance

DESIGN OF AN INTERACTIVE VIRTUAL FACTORY USING CELL FORMATION METHODOLOGIES

2003 ◽  
Vol 02 (02) ◽  
pp. 229-246 ◽  
Author(s):  
T. KESAVADAS ◽  
M. ERNZER
Keyword(s):  
Virtual Environment ◽  
Clustering Algorithm ◽  
Flow Analysis ◽  
Cell Formation ◽  
Open Architecture ◽  
Successful Implementation ◽  
Design Environment ◽  
Virtual Factory ◽  
Software Modules ◽  
And Performance

This paper describes an interactive virtual environment for modeling and designing factories and shop floors. The factory building tool is developed as an open architecture in which various modules can be utilized to quickly implement factory design algorithms ranging from plant layout to factory flow analysis. Software modules and utilities have been implemented to allow easy set-up of the visual interface. In this paper, this virtual factory is used to implement cellular manufacturing (CM) system. CM has traditionally been a very complicated system to implement in practice. However successful implementation of the system has improved productivity immersely. Several issues involved in implementing CM within our virtual factory machine modeling and interface designs for defining the cells, are discussed. The mathematical clustering algorithm called Modified Boolean Method was implemented to automatically generate complex virtual environments. The virtual factory makes the process of CM-based factory design a very easy and intuitive process. Though the cell formation problem is NP-complete in 2D space, issues related to human factors and ergonomics can be better perceived in a 3D virtual environment. It also leads to further optimization with respect to maintainability and performance, and thus help get better solutions, which are not visible unless the factory is built. Our virtual factory interface also allows easy reassignment of machines and parts, subcontracting of bottleneck parts and rearranging of machines within the same design environment, making this a productive industrial tool. 3D virtual factory can also be automatically generated from the Part Machine interface called the Virtual Matrix Interface.

Application and performance estimation of Mg/CO2 engine on Mars

2021 ◽  
Author(s):  
Mengzhe Li ◽  
Chunbo Hu ◽  
Zhiqin Wang ◽  
Yue Li ◽  
Jiaming Hu ◽  
...  
Keyword(s):  
Performance Estimation ◽  
And Performance

Performance prediction of axial flow compressors using stage characteristics and simultaneous calculation of interstage parameters

2001 ◽  
Vol 215 (1) ◽  
pp. 89-98 ◽  
Author(s):  
T. W. Song ◽  
T. S. Kim ◽  
J. H. Kim ◽  
S. T. Ro
Keyword(s):  
Gas Turbine ◽  
System Analysis ◽  
Axial Flow ◽  
Performance Estimation ◽  
Predicting Performance ◽  
Functional Formulation ◽  
Compressor Inlet ◽  
Multistage Compressors ◽  
And Performance ◽  
Axial Flow Compressors

A new method for predicting performance of multistage axial flow compressors is proposed that utilizes stage performance curves. The method differs from the conventional sequential stage-stacking method in that it employs simultaneous calculation of all interstage variables (temperature, pressure and flow velocity). A consistent functional formulation of governing equations enables this simultaneous calculation. The method is found to be effective, i.e. fast and stable, in obtaining solutions for compressor inlet and outlet boundary conditions encountered in gas turbine analyses. Another advantage of the method is that the effect of changing the angles of movable stator vanes on the compressor's operating behaviour can be simulated easily. Accordingly, the proposed method is very suitable for complicated gas turbine system analysis. This paper presents the methodology and performance estimation results for various multistage compressors employing both fixed and variable vane setting angles. The effect of interstage air bleeding on compressor performance is also demonstrated.

Drive modelling and performance estimation of IPM motor using SVPWM and Six-step Control Strategy

2021 ◽  
Keyword(s):  
Comprehensive Evaluation ◽  
Element Model ◽  
Torque Ripple ◽  
Performance Estimation ◽  
Smooth Transition ◽  
Motor Speed ◽  
Traction Motor ◽  
Modulation Techniques ◽  
And Performance ◽  
The Impact

This paper presents a comprehensive evaluation of the performance of an interior permanent magnet (IPM) traction motor drive, and analyses the impact of different modulation techniques. The most widely used modulation methods in traction motor drives are Space vector modulation (SVPWM), over-modulation, and six-step modulation have been implemented. A two-dimensional electromagnetic finite element model of the motor is co-simulated with a dynamic model of a field-oriented control (FOC) circuit. For accurate tuning of the current controllers, extended complex vector synchronous frame current regulators are employed. The DC-link voltage utilization, harmonics in the output waveforms, torque ripple, iron losses, and AC copper losses are calculated and compared with sinusoidal excitation. Overall, it is concluded that the selection of modulation technique is related to the operating condition and motor speed, and a smooth transition between different modulation techniques is essential to achieve a better performance.

scholarly journals Impact of mission requirements on the design of low observable UCAV configurations

2019 ◽  
Vol 91 (10) ◽  
pp. 1295-1307
Author(s):  
Eduardo Sepulveda Palacios ◽  
Howard Smith
Keyword(s):  
Low Cost ◽  
Leading Edge ◽  
Aircraft Design ◽  
Considerable Proportion ◽  
Design Environment ◽  
Sweep Angle ◽  
Content Type ◽  
Aerial Warfare ◽  
And Performance ◽  
Excess Power

Purpose The purpose of this paper is to characterise the effects of mission and performance parameters on the design space of low observable subsonic unmanned combat aerial vehicles (UCAVs) operating in typical Hi-Lo-Hi ground strike missions. Design/methodology/approach Conceptual design methodologies appropriate to low observable, tailless UCAVs have been integrated into a multidisciplinary aircraft design environment, GENUS, developed at Cranfield University’s aircraft design group. A basic Hi-Lo-Hi mission is designed and a baseline configuration is established through the GENUS framework. Subsequently, an evolutionary optimiser and a robust gradient-based optimiser are used to obtain convergent design solutions for various leading edge sweep angles, mission ranges, cruise Mach numbers and other operational constraints. Findings The results indicate that performance constraints, specifically in the form of specific excess power (SEP), have a large influence on the overall sizing of subsonic tailless UCAVs. This requirement drives the engine sizing, which represents a considerable proportion of the empty and gross mass of the vehicle. Cruise Mach number studies show that no significant advantages exist for operating at low speeds while maintaining performance requirements consistent with combat missions. There is a drastic increase in the vehicle’s mass and thrust requirements for flight speeds above Mach 0.8, with low sweep configurations showing a more pronounced effect. Increases in the range are not overly dependent on the leading edge sweep angle. Top-level radar cross section (RCS) results also favour configurations with higher leading edge sweep angles, especially from the nose-on aspect. Finally, research and development costs are shown to be directly linked to engine size. Originality/value This research shows the use of an integrated aircraft design environment that incorporates aerodynamics, performance, packaging and low observability aspects into the optimisation loop. Through this methodology, this study supports the efforts towards characterising and establishing alternate visions of the future of aerial warfare through the use of low cost, survivable unmanned platforms in network-centric cooperative tasks.

Design and Performance Estimation of a 20 T 46 mm No-Insulation All-REBCO User Magnet

2020 ◽  
Vol 30 (4) ◽  
pp. 1-5
Author(s):  
Kwangmin Kim ◽  
Kabindra Bhattarai ◽  
Kwang Lok Kim ◽  
Hongyu Bai ◽  
Iain R. Dixon ◽  
...  
Keyword(s):  
Performance Estimation ◽  
And Performance
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