Modelling approaches for the simulation-based preliminary design and optimization of electromechanical and hydraulic actuation systems

2012 ◽  
Author(s):  
Amine Fraj ◽  
Marc Budinger ◽  
Toufic El Halabi ◽  
Jean-charles Mare ◽  
Georgiana-Claudia Negoita
Keyword(s):  
Preliminary Design ◽  
Design And Optimization ◽  
Simulation Based ◽  
Actuation Systems ◽  
Modelling Approaches

Simulation-Supported Early Stage Design Optimisation for a Case Study of Life Cycle Oriented Buildings

2019 ◽  
Vol 887 ◽  
pp. 353-360 ◽  
Author(s):  
Sören Eikemeier ◽  
Ardeshir Mahdavi ◽  
Robert Wimmer
Keyword(s):  
Life Cycle ◽  
Architectural Design ◽  
Early Stage ◽  
Preliminary Design ◽  
Design Phase ◽  
Design Optimisation ◽  
Stage Design ◽  
Simulation Based ◽  
Early Stage Design

To reduce the energy and resource consumption in the building sector this study is focusing on a design optimisation of life cycle oriented buildings. In order to optimise the performance of the buildings and in consequence also to achieve improved results for the mandatory Austrian energy certificate a simulation-based rapid design approach is used for the early stage design phase of the buildings, in particular for the architectural design of the buildings.Methods like the Window to Wall Ratio, at the very beginning of the design process, a parametric simulation with EnergyPlus or a more detailed optimisation approach with GenOpt are integrated in this study applied to example buildings. The results are showing that the method can be used in a circular approach for improving the heating demand of the Austrian energy certificate for this case study by more than 25 % compared to the preliminary design

Graph-Based Interpretation of L-System Encodings Toward Aeroelastic Topology Optimization of a Morphing Airfoil in Supersonic Flow

2019 ◽  
Author(s):  
Brent R. Bielefeldt ◽  
Darren J. Hartl ◽  
Joshua D. Hodson ◽  
Gregory W. Reich ◽  
Philip S. Beran ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Performance Criteria ◽  
Preliminary Design ◽  
Structural Topology ◽  
L System ◽  
Design Variables ◽  
System L ◽  
Interpretation Algorithm ◽  
Actuation Systems ◽  
Reconfigurable Structures

Abstract This work details the preliminary design of a morphing airfoil in supersonic flow using evolutionary design principles. The structural topology of the airfoil includes a fixed outer mold line, fixed spars, and designable internal stiffeners and actuators. The designable components are generated using a bio-inspired model known as a Lindenmayer System (L-System), which encodes design variables and governs the development of a structural topology when coupled with an interpretation algorithm. Here, we utilize a graph-based interpretation scheme known as Spatial Interpretation for the Development of Reconfigurable Structures (SPIDRS), which has been shown to effectively explore the mechanism design space using a limited number of design variables. The optimization process behind this preliminary design problem is discussed, and optimal airfoil topologies capable of meeting specified aerodynamic performance criteria are presented in hopes of gaining a better understanding of how actuation systems could be integrated into the next generation of aircraft.

Simulation-based design and optimization of refrigeration cassettes

2011 ◽  
Vol 88 (12) ◽  
pp. 4756-4765 ◽  
Author(s):  
Maicon Waltrich ◽  
Christian J.L. Hermes ◽  
Cláudio Melo
Keyword(s):  
Design And Optimization ◽  
Simulation Based Design ◽  
Simulation Based

scholarly journals Simulation-Based Design and Optimization of Accelerometers Subject to High-Temperature and High-Impact Loads

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3759 ◽  
Author(s):  
Ji Li ◽  
Yaling Tian ◽  
Junjie Dan ◽  
Zhuming Bi ◽  
Jinhui Zheng ◽  
...  
Keyword(s):  
High Temperature ◽  
High Impact ◽  
Impact Loads ◽  
Sensing Element ◽  
Design And Optimization ◽  
Static And Dynamic Analysis ◽  
Simulation Based Design ◽  
Coupling Behavior ◽  
Simulation Based ◽  
Complete Failure

Due to multi-factor coupling behavior, the performance evaluation of an accelerometer subject to high-temperature and high-impact loads poses a significant challenge during its design phase. In this paper, the simulation-based method is applied to optimize the design of the accelerometer. The proposed method can reduce the uncertainties and improve the fidelity of the simulation in the sense that (i) the preloading conditions of fasteners are taken into consideration and modeled in static analysis; (ii) all types of loadings, including bolt preloads, thermal loads, and impact loads, are defined in virtual dynamic prototype of the accelerometer. It is our finding that from static and dynamic analysis, an accelerometer is exposed to the risk of malfunction and even a complete failure if the temperature rises to a certain limit; it has been proved that the thermal properties of sensing components are the most critical factors for an accelerometer to achieve its desired performance. Accordingly, we use a simulation-based method to optimize the thermal expansion coefficient of the sensing element and get the expected design objectives.

The Characteristic Analysis of a Piezoelectric Actuator for Valveless Micropumps

2006 ◽  
Vol 326-328 ◽  
pp. 1511-1514
Author(s):  
Sung Hyuk Lee ◽  
Seok Heo ◽  
Cheol Woong Kim ◽  
Kwang Joon Yoon
Keyword(s):  
Theoretical Model ◽  
Piezoelectric Actuator ◽  
Bonding Layer ◽  
Finite Element Analyses ◽  
Characteristic Analysis ◽  
Design And Optimization ◽  
Simulation Based ◽  
Piezoelectric Disk ◽  
Theoretical Results ◽  
Good Agreement

The behavior of a circular piezoelectric actuator for volumetric micropump has been investigated by using theoretical and finite element analyses. A modified theoretical model was developed to predict the behavior of a piezoelectric actuator induced by the applied voltage. The theoretical results for the diaphragm deflection were in good agreement with the results from numerical simulation. Based on the theoretical analysis, the effects of several important parameters on actuation performance have been investigated. These parameters include the dimensions and mechanical properties of the piezoelectric disk, bonding layer and elastic diaphragm materials. Consequently, it is thought that above theoretical model might be employed as a tool for design and optimization of the piezoelectric actuator for micropump application.

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