Application of Optimization Techniques in the Conceptual Design of Morphing Aircraft

2003 ◽  
Author(s):  
Brian Roth ◽  
William Crossley
Keyword(s):  
Conceptual Design ◽  
Optimization Techniques ◽  
Morphing Aircraft

Kinematically Designed Flexible Skins for Morphing Aircraft

Aerospace ◽  
2006 ◽  
Author(s):  
Christine Pastor ◽  
Brian Sanders ◽  
James J. Joo ◽  
Robin McCarty
Keyword(s):  
Shape Memory Polymer ◽  
Matrix Material ◽  
Optimization Techniques ◽  
Heat Transfer Analysis ◽  
Material Response ◽  
Morphing Aircraft ◽  
The Matrix ◽  
Link Density ◽  
Cross Link Density ◽  
Reinforcing Fiber

This investigation targeted the development of flexible materials that when combined with mechanized structures can enable large rigid body deformations of aircraft structures while maintaining its aerodynamic shape. The solution presented in this work focuses on determining the distribution of material properties to design such a skin using topology optimization techniques. The matrix material selected in this research is a representative Shape Memory Polymer (SMP), which is embedded with a reinforcing fiber. The fiber plays a dual role in that in addition to serving as a reinforcing element it also provides the means to activate the material response (e.g., changing cross link density) via resistive heating. In depth heat transfer analysis and experiments were conducted to understand power requirements and minimum spacing of the fibers to activate the desired material response.

NeoCASS+, A Conceptual Design and Simulation Framework for Morphing Aircraft

2013 ◽  
Vol 92 (1-2) ◽  
pp. 52-60
Author(s):  
L. Cavagna ◽  
A. De Gaspari ◽  
L. Riccobene ◽  
S. Ricci
Keyword(s):  
Conceptual Design ◽  
Simulation Framework ◽  
Morphing Aircraft

Structural Topology Optimization for Street Lamp Bracket

2011 ◽  
Vol 464 ◽  
pp. 655-659
Author(s):  
Yong Wang ◽  
Guo Niu Zhu ◽  
Zheng Wei Zhu
Keyword(s):  
Topology Optimization ◽  
Conceptual Design ◽  
Development Process ◽  
Positive Impact ◽  
Mechanical Design ◽  
Optimization Techniques ◽  
Structural Topology Optimization ◽  
Structural Topology ◽  
General Acceptance ◽  
Street Lamp

Structural topology optimization has got a general acceptance in recent years in mechanical design due to its powerful technique for conceptual design. The shortcoming of current development process of mechanical design is discussed and a new approach with structural topology optimization is put forward. The application of the method demonstrates that through innovative utilization of the topology optimization techniques, a multitude of conceptual design proposals based on the design space and design targets can be obtained and then a CAD model with high quality which has a positive impact on the development process is also available.

Integrated Optimization for Supporting Functional and Layout Designs During Conceptual Design Phase

2009 ◽  
Author(s):  
Masakazu Kobayashi ◽  
Yuya Suzuki ◽  
Masatake Higashi
Keyword(s):  
Conceptual Design ◽  
Layout Optimization ◽  
Optimization Techniques ◽  
Design Concept ◽  
Functional Structure ◽  
Design Solution ◽  
Functional Optimization ◽  
Integrated Optimization ◽  
Design Object ◽  
Target Design

This paper proposes a new integrated optimization of a functional structure and a components layout for supporting a conceptual design. A conceptual design is the second phase of a product development, where designers build up the functional structure and the components layout of the target design object as the design concept. However, a functional design and a layout design are very different tasks, there is a lot of flexibility for decision makings during them and its solution space is vast. Therefore, it is extremely difficult for designers to build up an optimal design concept by considering various design requirements themselves. To overcome this limitation, this paper develops a new design method based on optimization techniques. This method consists of two optimizations, a functional optimization and a layout optimization, and obtains the optimal solutions by cooperatively executing two optimizations. Specifically, a functional optimization based on a GA is the main part of the proposed method and executed just one time whereas a layout optimization is executed to calculate the layout with minimum area (or volume) for each design solution for each iteration during the process of the functional optimization and the result is used as one of its valuation characteristics. Using the proposed method, designers can simultaneously obtain both the functional structure and the components layout of the target design object that satisfies performance, cost and area at a high level. To demonstrate the flow of the proposed method and confirm its effectiveness, this paper describes the case study, where internal devices of a personal computer are designed using the proposed method.

Simultaneous Type and Dimensional Synthesis of Mechanisms by Genetic Algorithms

1994 ◽  
Author(s):  
W. Eugene Fang
Keyword(s):  
Genetic Algorithms ◽  
Conceptual Design ◽  
Problem Formulation ◽  
Optimization Techniques ◽  
Dimensional Synthesis ◽  
Design Problems ◽  
New Approach ◽  
Search Optimization ◽  
As Species ◽  
Synthesis Of Mechanisms

Abstract Based on global search/optimization techniques called genetic algorithms, a new approach to the conceptual design of mechanisms is proposed. Emulating “natural” genetics and selection, competing types of mechanisms are treated as species and different dimensions are evaluated for each type simultaneously. The problem formulation is straight-forward, similar to an optimization problem. The result may be a spectrum of similar or different mechanisms, depending on whether multiple optimal solutions exist. The computational power required to utilize this approach is acceptable for most conceptual design problems.

scholarly journals Research on Preference Polyhedron Model Based Evolutionary Multiobjective Optimization Method for Multilink Transmission Mechanism Conceptual Design

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Haihua Zhu ◽  
Jun Yang ◽  
Weihua Lu ◽  
Jing Li
Keyword(s):  
Conceptual Design ◽  
Dynamic Performance ◽  
Optimization Method ◽  
Optimization Techniques ◽  
Transmission Mechanism ◽  
Evaluation Methodology ◽  
Transmission Mechanisms ◽  
Conceptual Design Phase ◽  
Single Target ◽  
Polyhedron Model

To make the optimal design of the multilink transmission mechanism applied in mechanical press, the intelligent optimization techniques are explored in this paper. A preference polyhedron model and new domination relationships evaluation methodology are proposed for the purpose of reaching balance among kinematic performance, dynamic performance, and other performances of the multilink transmission mechanism during the conceptual design phase. Based on the traditional evaluation index of single target of multicriteria design optimization, the robust metrics of the mechanism system and preference metrics of decision-maker are taken into consideration in this preference polyhedron model and reflected by geometrical characteristic of the model. At last, two optimized multilink transmission mechanisms are designed based on the proposed preference polyhedron model with different evolutionary algorithms, and the result verifies the validity of the proposed optimization method.

Innovative Conceptual Design

2001 ◽  
Author(s):  
Ehud Kroll ◽  
Sridhar S. Condoor ◽  
David G. Jansson
Keyword(s):  
Conceptual Design
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