Optimal Design of a Composite Plate with Practical Design and Manufacturing Constraints

2017 ◽  
Author(s):  
Robert M. Taylor ◽  
Deepak Polaki
Keyword(s):  
Optimal Design ◽  
Composite Plate ◽  
Manufacturing Constraints ◽  
Practical Design ◽  
Design And Manufacturing

Momentum exchange impact damper design methodology for object-wall-collision problems

2017 ◽  
Vol 24 (14) ◽  
pp. 3206-3218
Author(s):  
Yohei Kushida ◽  
Hiroaki Umehara ◽  
Susumu Hara ◽  
Keisuke Yamada
Keyword(s):  
Optimal Design ◽  
Design Methodology ◽  
Design Parameters ◽  
Momentum Exchange ◽  
Impact Damper ◽  
One Dimensional ◽  
Practical Design ◽  
Wall Collision ◽  
Damper Design ◽  
And Control

Momentum exchange impact dampers (MEIDs) were proposed to control the shock responses of mechanical structures. They were applied to reduce floor shock vibrations and control lunar/planetary exploration spacecraft landings. MEIDs are required to control an object’s velocity and displacement, especially for applications involving spacecraft landing. Previous studies verified numerous MEID performances through various types of simulations and experiments. However, previous studies discussing the optimal design methodology for MEIDs are limited. This study explicitly derived the optimal design parameters of MEIDs, which control the controlled object’s displacement and velocity to zero in one-dimensional motion. In addition, the study derived sub-optimal design parameters to control the controlled object’s velocity within a reasonable approximation to derive a practical design methodology for MEIDs. The derived sub-optimal design methodology could also be applied to MEIDs in two-dimensional motion. Furthermore, simulations conducted in the study verified the performances of MEIDs with optimal/sub-optimal design parameters.

Remarks on Conditions for the Validity of Parametric Decomposition in Optimal Design

1990 ◽  
Author(s):  
J. R. Jagannatha Rao ◽  
Panos Y. Papalambros
Keyword(s):  
Optimal Design ◽  
Present Article ◽  
Original Problem ◽  
Necessary Conditions ◽  
Special Problem ◽  
Problem Structure ◽  
Globally Convergent ◽  
Parametric Decomposition ◽  
Practical Design ◽  
Decomposition Strategies

Abstract Decomposition strategies are used in a variety of practical design optimization applications. Such decompositions are valid, if the solution of the decomposed problem is in fact also the solution to the original one. Conditions for such validity are not always obvious. In the present article, we develop conditions for two-level parametric decomposition under which: (1) isolated minima at the two levels imply an isolated minimum for the original problem; (2) necessary conditions at the two-levels are equivalent to the necessary conditions for the original problem; and, (3) a descent algorithm for computing Karush-Kuhn-Tucker points in decomposition formulations is globally convergent. Since no special problem structure is assumed, the results are general and could be used to evaluate the suitability of a variety of approaches and algorithms for decomposition strategies.

scholarly journals The influence of the manufacturing constraints on the optimal design of laminated conical shells

2020 ◽  
Vol 235 ◽  
pp. 111820 ◽  
Author(s):  
Adam Stawiarski ◽  
Małgorzata Chwał ◽  
Marek Barski ◽  
Aleksander Muc
Keyword(s):  
Optimal Design ◽  
Manufacturing Constraints ◽  
Conical Shells ◽  
Laminated Conical Shells

Manufacturability Analysis Using Fuzzy Cognitive Maps

1995 ◽  
Author(s):  
Prasad S. Gavankar ◽  
Subramanya K. Rao
Keyword(s):  
Fuzzy Logic ◽  
Real Life ◽  
Cognitive Maps ◽  
Fuzzy Cognitive Maps ◽  
Manufacturing Constraints ◽  
Design Features ◽  
Design And Manufacturing ◽  
Manufacturing Problems ◽  
Life Design ◽  
Better Than

Abstract Today’s designers face a challenge of designing newer products in a shorter period of time. The task can be achieved successfully only if the designers are aware of manufacturability constraints throughout the design process. In this paper, a novel framework is outlined that will make a design easy to manufacture. Fuzzy cognitive maps are employed to develop the design framework. Fuzzy logic is being increasingly used in engineering decision making. Fuzzy logic models the reality better than crisp logic since uncertainties are involved in most design and manufacturing problems. In this research, a framework is built to couple design features with manufacturing constraints. Fuzzy cognitive maps are employed to build the framework. The goal is to evaluate the implications of changing design features on the relative ease of manufacture. The presented concepts are illustrated using a real life design problem.

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