Pareto optimal synthesis of four-bar mechanisms for path generation

2009 ◽  
Vol 44 (1) ◽  
pp. 180-191 ◽  
Author(s):  
N. Nariman-Zadeh ◽  
M. Felezi ◽  
A. Jamali ◽  
M. Ganji
Keyword(s):  
Optimal Synthesis ◽  
Pareto Optimal ◽  
Path Generation

Pareto optimal synthesis of eight-bar mechanism using meta-heuristic multi-objective search approaches: application to bipedal gait generation

2020 ◽  
pp. 1-23
Author(s):  
Miguel Gabriel Villarreal-Cervantes ◽  
Jesús Said Pantoja-García ◽  
Alejandro Rodríguez-Molina ◽  
Saul Enrique Benitez-Garcia
Keyword(s):  
Optimal Synthesis ◽  
Pareto Optimal ◽  
Gait Generation ◽  
Multi Objective ◽  
Bipedal Gait

scholarly journals Pareto Optimal Path Generation Algorithm in Stochastic Transportation Networks

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 58970-58981 ◽  
Author(s):  
Mahmoud Owais ◽  
Abdullah Alshehri
Keyword(s):  
Transportation Networks ◽  
Optimal Path ◽  
Pareto Optimal ◽  
Path Generation ◽  
Generation Algorithm

Optimal Synthesis of Cam-Linkage Mechanisms for Precise Path Generation

2006 ◽  
Vol 128 (6) ◽  
pp. 1253-1260 ◽  
Author(s):  
D. Mundo ◽  
J. Y. Liu ◽  
H. S. Yan
Keyword(s):  
Degrees Of Freedom ◽  
Tangential Velocity ◽  
Goal Function ◽  
Optimal Synthesis ◽  
Performance Criteria ◽  
Synthesis Process ◽  
Path Generation ◽  
Linkage Mechanism ◽  
Generation Task ◽  
Synthesis Methodology

The paper proposes a method for the optimal synthesis of planar mechanisms, where a combination of cams and linkages is used in order to obtain a precise path generation. As a first step, based on Gruebler’s mobility criterion, a linkage mechanism is considered, with as many degrees of freedom as required by the generation task. One or more disk cams are then synthesized in order to reduce the system’s mobility and to obtain a single-input combined mechanical system. The final combined mechanism is able to guide a coupler point through any number of precision positions. A strategy for the global optimization of the synthesis process, based on evolutionary theory, is also proposed. A goal function is defined on the basis of dimensional and kinematic constraints and performance criteria, while a genetic algorithm is employed as an optimum searching procedure. An industrial application of the proposed methodology is described, where a path generation problem with time prescription is dealt with. The objective of the generation task is to guide a coupler point along a figure-eight trajectory, with a constant tangential velocity. Such a task is required by polishing machines for fiber optic connectors and similar components. A kinematic simulation of the optimal mechanism is used to validate the proposed synthesis methodology.

Optimal Synthesis of Adjustable Linkages for Precise Continuous Path Generation Using the Optimal Link Length Adjustment

2008 ◽  
Author(s):  
Hong Zhou ◽  
Mohammed Jamal ◽  
Arif Mohammed
Keyword(s):  
Genetic Algorithm ◽  
Penalty Method ◽  
Optimal Solution ◽  
Optimal Synthesis ◽  
Path Generation ◽  
Continuous Path ◽  
Link Length ◽  
Global Optimal Solution ◽  
Global Optimal ◽  
Synthesis Approach

Conventional nonadjustable four-bar linkages can only generate the desired continuous paths approximately. With one link length adjustment, the whole desired continuous path can be generated precisely. In this paper, the length of the driven side link or coupler is adjusted to generate the desired continuous paths precisely. The linkage feasibility conditions and path generation flexibilities of the adjustable four-bar linkages are analyzed. The optimal synthesis model of adjustable four-bar linkages is established based on the required optimal link length adjustment when the desired continuous path is precisely generated. The global optimal solution is searched by a real-valued genetic algorithm in which the involved constraints are handled using the function penalty method. The effectiveness of the optimal synthesis approach proposed in the paper is verified by the demonstrated examples.

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