Minimization of Inertia-Induced Forces in Spherical Four-Bar Mechanisms. Part 1: The General Spherical Four-Bar Linkage

1983 ◽  
Vol 105 (3) ◽  
pp. 471-477 ◽  
Author(s):  
G. S. Gill ◽  
F. Freudenstein
Keyword(s):  
Quadratic Programming ◽  
Computer Aided Design ◽  
High Speed ◽  
Programming Technique ◽  
Trade Off ◽  
Design Procedures ◽  
Computer Aided ◽  
Aided Design ◽  
Four Bar Linkage ◽  
Input Torque

Computer-aided design procedures have been developed for the optimum mass distribution of the links of high-speed spherical four-bar linkages. The analysis, which includes a quadratic-programming technique, allows an optimum trade-off between shaking forces, shaking moments, bearing reactions, and input-torque fluctuation. The results are illustrated in the case of a Hooke joint and a wobble-plate linkage.

Minimization of Inertia-Induced Forces in Spherical Four-Bar Mechanisms. Part 2: Wobble-Plate Engines

1983 ◽  
Vol 105 (3) ◽  
pp. 478-483 ◽  
Author(s):  
G. S. Gill ◽  
F. Freudenstein
Keyword(s):  
Mass Distribution ◽  
Computer Aided Design ◽  
High Speed ◽  
Design Procedures ◽  
Computer Aided ◽  
Aided Design

In Part 2 of this paper, computer-aided design procedures have been developed for the optimum mass distribution of high-speed wobble-plate engines.

scholarly journals Design Method of Circular Weft-Knitted Jacquard Fabric Based on Jacquard Module

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Peixiao Zheng ◽  
Gaoming Jiang ◽  
Honglian Cong
Keyword(s):  
Mathematical Modeling ◽  
Computer Aided Design ◽  
Theoretical Basis ◽  
Design Method ◽  
Two Dimensional ◽  
Design Procedures ◽  
Rapid Design ◽  
Computer Aided ◽  
Aided Design

Abstract Recently, there is an increasing interest in design of circular weft jacquard because of the pursuit of fashion and comfort. Aiming at the complexity of the computer-aided design method of the existing circular weft-knitted jacquard fabrics, which is not conducive to the rapid design and intelligible for designers, a design method was proposed to transform pattern notation into knitting diagram efficiently, which was based on knitting rules and its creation as a set of jacquard modules. Knitting characteristics of jacquard fabrics were studied as a precondition. On this basis, the design procedures of jacquard modules were analyzed and illustrated by taking tricolor bird's eye backing jacquard as an example. Jacquard modules with various jacquard effects were designed and stored in a jacquard module database. To mathematically describe pattern notation, knitting diagram, and jacquard module, two-dimensional matrixes were established by the method of mathematical modeling, and a corresponding algorithm for the transformation of the pattern to knitting information according to the knitting rules of jacquard modules, which can be applied to ordinary jacquard fabrics was summarized. The project of tricolor circular weft-knitted jacquard with bird's eye in the reverse and four-color air-layer jacquard were taken for instance to verify the models and algorithm. The results obtained show that the approach can efficiently and conveniently realize the designation and machine-knitting of weft-knitted jacquard fabric, which provide a theoretical basis and notation of modeling for the computer-aided design of circular weft-knitted jacquard fabrics.

Supersolidus liquid phase sintering of high speed steels: Part 3: computer aided design of sinterable alloys

1999 ◽  
Vol 42 (2) ◽  
pp. 131-146 ◽  
Author(s):  
C.S. Wright ◽  
M. Youseffi ◽  
A.S. Wronski ◽  
I. Ansara ◽  
M. Durand-Charre ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Computer Aided Design ◽  
High Speed ◽  
Liquid Phase Sintering ◽  
Computer Aided ◽  
Aided Design

Over-Constrained Mechanisms Derived From RPRP Loops

2018 ◽  
Author(s):  
Kwun-Lon Ting ◽  
Kuan-Lun Hsu
Keyword(s):  
Computer Aided Design ◽  
Random Search ◽  
Modular Approach ◽  
Input Output ◽  
Assembly Strategy ◽  
Revolute Joints ◽  
Computer Aided ◽  
Prismatic Joints ◽  
Aided Design ◽  
Four Bar Linkage

This paper addresses the assembly strategy capable of deriving a family of over-constrained mechanisms systematically. The modular approach is proposed. It treats the topological synthesis of over-constrained mechanisms as a systematical derivation rather than a random search. The result indicates that a family of over-constrained mechanisms can be constructed by combining legitimate modules. A spatial four-bar linkage containing two revolute joints (R) and two prismatic joints (P) is selected as the source-module for the purpose of demonstration. All mechanisms discovered in this paper were modeled and animated with computer aided design (CAD) software and their mobility were validated with input-output equations as well as computer simulations. The assembly strategy can serve as a self-contained library of over-constrained mechanisms.

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