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11-09-2018 | Original | Issue 12/2018

Archive of Applied Mechanics 12/2018

Optimization of dynamic quantities of a four-bar mechanism using the Hybrid Cuckoo Search and Firefly Algorithm (H-CS-FA)

Journal:
Archive of Applied Mechanics > Issue 12/2018
Authors:
Marina Bošković, Radovan R. Bulatović, Slaviša Šalinić, Goran R. Miodragović, Gordana M. Bogdanović
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Abstract

This paper presents an optimization technique for dynamic balancing of a four-bar mechanism for the purpose of minimization of joint reactions, shaking forces and shaking moment. Joint reaction forces were determined by using a new method which can be applied in rigid planar closed-loop kinematic chains with revolute joints, and it is based on the use of absolute angles of rotation. The problem of balancing the obtained joint reaction forces was then solved as a multi-objective optimization problem. Kinematic and dynamic parameters of the four-bar linkage were taken as design variables. Three cases with simultaneous minimization of several objective functions were considered. The new hybrid algorithm named Hybrid Cuckoo Search and Firefly Algorithm (H-CS-FA) was used for solving the defined optimization problem in accordance with the given constraints. The appropriate selection of objective functions (three cases) and the application of the proposed algorithm resulted in a significant reduction of the values of joint reactions, shaking forces, shaking moment and driving torque. A concrete numerical example was used to show the efficiency of the new hybrid algorithm. The results obtained by H-CS-FA are compared with those obtained by using basic algorithms in the hybridization process (CS and FA) which proved the superiority of the newly proposed optimization procedure.

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