Optimal Design for Efficiency of 3K-Type Planetary Reducer Using Nonlinear Optimization

Kim, Sooyoung; Hur, Seongyong; Choi, Dongil

doi:10.3795/ksme-a.2022.46.2.171

Cited by 2 publications

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“…The previous study conducted at this lab [11] transformed the problem of reducer design into the problem of conventional optimization in which optimal solutions to the objective functions were found using many variables. The study proposed a solution to the problem of designing an optimal gear ratio by applying the Sequential Quadratic Programming(SQP) method.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of a Compound Planetary Reducer Using a Nonlinear Optimization Method

et al. 2023

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The growth of the robotics industry has led to rising demand for reducers that increase torque efficiently while reducing motor speed. Among them, compound planetary reducers can be effectively used in robots because they can achieve high gear ratios with smaller volume. The design of conventional reducers comprises the method of setting a gear ratio to design the gear dimensions and calculating efficiency through dynamic analysis. However, this method suffers from repeated designing and analysis, which makes it very time-consuming. Therefore, this study defines the problem of reducer design as the problem of optimization by setting an objective function, constraints, and boundary conditions, and proposes to obtain the results in a short period of time using the Sequential Least Squares Programming(SLSQP) method. Using the SLSQP method, optimization results can be obtained as real numbers, making it suitable for use in compound planetary friction reducers with no constraints on the selection of gear dimension. For the design problem of the conventional compound planetary gear reducer in which the module value exists, an additional optimal design method considering the module is proposed. To compare the optimal results, we have made a 30:1 compound planetary friction reducer and a 50:1 compound planetary gear reducer using 3D printing. A gear ratio evaluation experiment was conducted to evaluate the performance of the actual manufactured prototype reducers.

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Section: Introductionmentioning

confidence: 99%

Optimal Design of a Compound Planetary Reducer Using a Nonlinear Optimization Method

et al. 2023

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Optimization of Design Parameters Using SQP for an Agricultural Pipe Extraction Device

Lee

Han

et al. 2023

Applied Sciences

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Removal of agricultural pipes used in crop support and greenhouse agriculture is manpower-intensive. However, most agricultural workers are elderly. Therefore, auxiliary devices should be used to allow pipe removal with as little force as possible. In this study, the design parameters of an extraction device were optimized within constraints to minimize the force required to remove agricultural pipes. The optimization parameters are the length of each link and the initial link angle of the device. The driving force, according to the design parameters, was calculated by applying the theory of kinematics. An optimal design plan was derived using an optimization algorithm to minimize the force driving the device within the desired constraint. As a result of the optimization, it was confirmed that the force required to remove the pipe was reduced by 87.1% compared with the initial design value and was designed to suit the user’s convenience.

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Optimal Design for Efficiency of 3K-Type Planetary Reducer Using Nonlinear Optimization

Cited by 2 publications

References 0 publications

Optimal Design of a Compound Planetary Reducer Using a Nonlinear Optimization Method

Optimal Design of a Compound Planetary Reducer Using a Nonlinear Optimization Method

Optimization of Design Parameters Using SQP for an Agricultural Pipe Extraction Device

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