A Novel Design Procedure for Optimal Design of CFS Compression Members

The fluid–structure interaction (FSI) effect has a significant impact on the static and dynamic performance of aerostatic spindles, which should be fully considered when developing a new product. To enhance the overall performance of aerostatic spindles, a two-round optimization design method for aerostatic spindles considering the FSI effect is proposed in this article. An aerostatic spindle is optimized to elaborate the design procedure of the proposed method. In the first-round design, the geometrical parameters of the aerostatic bearing were optimized to improve its stiffness. Then, the key structural dimension of the aerostatic spindle is optimized in the second-round design to improve the natural frequency of the spindle. Finally, optimal design parameters are acquired and experimentally verified. This research guides the optimal design of aerostatic spindles considering the FSI effect.

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Optimal design of 6-DOF eclipse mechanism based on task-oriented workspace

Robotica ◽

10.1017/s0263574711000774 ◽

2011 ◽

Vol 30 (7) ◽

pp. 1041-1048 ◽

Cited By ~ 5

Author(s):

Donghun Lee ◽

Jongwon Kim ◽

TaeWon Seo

Keyword(s):

Optimal Design ◽

Unit Length ◽

Numerical Procedure ◽

Design Procedure ◽

Mass Reduction ◽

Objective Functions ◽

Design Efficiency ◽

Task Oriented ◽

Structural Mass ◽

Optimal Set

SUMMARYWe present a new numerical optimal design for a redundant parallel manipulator, the eclipse, which has a geometrically symmetric workspace shape. We simultaneously consider the structural mass and design efficiency as objective functions to maximize the mass reduction and minimize the loss of design efficiency. The task-oriented workspace (TOW) and its partial workspace (PW) are considered in efficiently obtaining an optimal design by excluding useless orientations of the end-effector and by including just one cross-sectional area of the TOW. The proposed numerical procedure is composed of coarse and fine search steps. In the coarse search step, we find the feasible parameter regions (FPR) in which the set of parameters only satisfy the marginal constraints. In the fine search step, we consider the multiobjective function in the FPR to find the optimal set of parameters. In this step, fine search will be kept until it reaches the optimal set of parameters that minimize the proposed objective functions by continuously updating the PW in every iteration. By applying the proposed approach to an eclipse-rapid prototyping machine, the structural mass of the machine can be reduced by 8.79% while the design efficiency is increased by 6.2%. This can be physically interpreted as a mass reduction of 49 kg (the initial structural mass was 554.7 kg) and a loss of 496 mm3/mm in the workspace volume per unit length. The proposed optimal design procedure could be applied to other serial or parallel mechanism platforms that have geometrically symmetric workspace shapes.

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A novel design procedure for tractor clutch fingers by using optimization and response surface methods

Journal of Mechanical Science and Technology ◽

10.1007/s12206-016-0522-x ◽

2016 ◽

Vol 30 (6) ◽

pp. 2615-2625 ◽

Cited By ~ 2

Author(s):

Oguz Dogan ◽

Fatih Karpat ◽

Celalettin Yuce ◽

Necmettin Kaya ◽

Nurettin Yavuz ◽

...

Keyword(s):

Response Surface ◽

Design Procedure ◽

Response Surface Methods ◽

Novel Design

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Synthesis of Inertially Compensated Variable-Speed Cams

Journal of Mechanical Design ◽

10.1115/1.1582502 ◽

2003 ◽

Vol 125 (3) ◽

pp. 593-601 ◽

Cited By ~ 12

Author(s):

B. Demeulenaere ◽

J. De Schutter

Keyword(s):

High Speed ◽

Design Procedure ◽

Variable Speed ◽

Speed Variation ◽

Design Choice ◽

Cam Follower ◽

Speed Fluctuation ◽

Novel Design

Traditionally, cam-follower systems are designed by assuming a constant camshaft speed. Nevertheless, all cam-follower systems, especially high-speed systems, exhibit some camshaft speed fluctuation (despite the presence of a flywheel) which causes the follower motions to be inaccurate. This paper therefore proposes a novel design procedure that explicitly takes into account the camshaft speed variation. The design procedure assumes that (i) the cam-follower system is conservative and (ii) all forces are inertial. The design procedure is based on a single design choice, i.e., the amount of camshaft speed variation, and yields (i) cams that compensate for the inertial dynamics for any period of motion and (ii) a camshaft flywheel whose (small) inertia is independent of the period of motion. A design example shows that the cams designed in this way offer the following advantages, even for non-conservative, non-purely inertial cam-follower systems: (i) more accurate camshaft motion despite a smaller flywheel, (ii) lower motor torques, (iii) more accurate follower motions, with fewer undesired harmonics, and (iv) a camshaft motion spectrum that is easily and robustly predictable.

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A Study on the Micro Property Testing of Micro Embossing Patterned Metallic Thin Foil

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.345-346.335 ◽

2007 ◽

Vol 345-346 ◽

pp. 335-338

Author(s):

Hye Jin Lee ◽

Nak Kyu Lee ◽

Hyoung Wook Lee

Keyword(s):

Mechanical Properties ◽

Optimal Design ◽

Design Procedure ◽

Thin Foil ◽

Property Testing ◽

Rolling Process ◽

Industrial Technology ◽

Cold Isostatic Press ◽

Nano Indentation ◽

Thin Foils

In this paper, Experimental results on the measurement of mechanical properties of fine patterns in the MEMS structure are described. The mechanical properties of embossing patterns on metallic thin foil is measured using the nano indentation system, that is developed by Korea Institute of Industrial Technology(KITECH). These micro embossing patterns are fabricated using CIP(Cold Isostatic Press) process on micro metallic thin foils(Al-1100) that are made by rolling process. These embossing patterned metallic thin foils(Al-1100) are used in the reflecting plate of BLU(Back Light Unit) and electrical/mechanical MEMS components. If these mechanical properties of fine patterns are utilized in a design procedure, the optimal design can be achieved in aspects of reliability as well as economy.

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Optimal Design Procedure of Inductive Power Transfer Converters according to Various Vertical Distances

2019 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific) ◽

10.1109/itec-ap.2019.8903764 ◽

2019 ◽

Author(s):

Won-Jin Son ◽

Jae Han Lee ◽

Sangioon Ann ◽

Jongeun Byun ◽

Byoung Kuk Lee

Keyword(s):

Optimal Design ◽

Design Procedure ◽

Power Transfer ◽

Inductive Power Transfer ◽

Inductive Power

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Weight reduction of permanent magnet disc motor for electric vehicle using genetic algorithm optimal design procedure

IEEE EUROCON 2009 ◽

10.1109/eurcon.2009.5167738 ◽

2009 ◽

Cited By ~ 1

Author(s):

Goga V. Cvetkovski ◽

Lidija B. Petkovska

Keyword(s):

Genetic Algorithm ◽

Optimal Design ◽

Permanent Magnet ◽

Electric Vehicle ◽

Weight Reduction ◽

Design Procedure

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Partitioning Techniques for Built-In Self-Test Design

VLSI Design ◽

10.1155/1994/25656 ◽

1994 ◽

Vol 2 (3) ◽

pp. 185-198

Author(s):

Chien-In Henry Chen

Keyword(s):

Optimal Design ◽

Design Procedure ◽

Computationally Efficient ◽

Two Phase ◽

Worst Case ◽

Hardware Overhead ◽

Phase Cluster ◽

Unified Algorithm ◽

Self Test ◽

Built In Self Test

An efficient, unified algorithm, Advanced Two-Phase Cluster Partitioning, is proposed for automated synthesis of pseudo-exhaustive test generator for Built-In Self-Test (BIST) design. A prototype of the algorithm, Two-Phase Cluster Partitioning, has been proposed and the hierarchical design procedure is computationally efficient and produces test generation circuitry with low hardware overhead. However, in certain worst case, the algorithm may generate a sub-optimal design which requires more test patterns and/or hardware overhead. In order to generate a globally optimal design, further improvement of two-phase algorithm can be achieved by expanding the design space for the formation of linear sum so that the number of test signals required for pseudo-exhaustive testing can be reduced. We demonstrate the effectiveness of our approach by presenting detailed comparisons of our results against those that would be obtained by existing techniques.

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