A fruit fly optimization method for trajectory design of planar four-bar linkage

Abstract

A Drosophila optimization method for trajectory design of a planar four-bar linkage. In the planar four-bar mechanism of the present invention, l 1 is the active rod, l 2 is the connecting rod, l 3 is the driven rod, l 4 is the frame, φ 0 and ψ 0 are the initial position angles when the corresponding rod is at the right limit position; the decimal 2×3 real-valued matrix code is adopted, and the row vector of the matrix represents the dimension position of the search space where the fruit fly individual is located; the planar four-bar mechanism according to the present invention The optimization model of the problem description designs the coding method of the fruit fly population individual and the new olfactory concentration judgment value function. Secondly, according to the olfactory concentration value, the population is dynamically divided into excellent subgroups and ordinary subgroups to implement different population evolution models. Finally, different Drosophila subgroups adopt elite learning strategy and differential mutation strategy to enhance the learning efficiency of the algorithm and maintain the diversity of the population. The design example analysis of planar four-bar mechanism shows that this method is feasible and effective, and its parameter optimization design results are better than traditional design methods.

Description

technical field [0001] The invention belongs to the field of four-bar transmission mechanism, and in particular relates to a fruit fly optimization method for track design of a planar four-bar mechanism. Background technique [0002] Due to its relatively simple structure, convenient manufacturing and low cost, the planar four-bar mechanism has been widely used in industrial and agricultural production, for example, underactuated mechanisms in industrial robot actuators, loaders in construction machinery The bucket mechanism, as well as the stirring and sealing mechanism in food and packaging equipment, will be used in related operations. The fundamental purpose of using a planar four-bar mechanism is to conveniently realize a given motion law or motion track reproduction through a simple and practical mechanism to complete a predetermined motion or action and to achieve some necessary complex motion requirements of the equipment. In recent years, with the rapid development...

AI Technical Summary

Problems solved by technology

Although these methods are feasible and effective, they also have the disadvantages of complex algorithm flow, numerous calculation parameters and high requirements for designers’ experience.

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