Multidisciplinary co-design optimization of structural and control parameters for bucket wheel reclaimer
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RESEARCH ARTICLE
Yongliang YUAN, Liye LV, Shuo WANG, Xueguan SONG
Multidisciplinary co-design optimization of structural and control parameters for bucket wheel reclaimer
© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Bucket wheel reclaimer (BWR) is an extremely complex engineering machine that involves multiple disciplines, such as structure, dynamics, and electromechanics. The conventional design strategy, namely, sequential strategy, is structural design followed by control optimization. However, the global optimal solution is difficult to achieve because of the discoordination of structural and control parameters. The co-design strategy is explored to address the aforementioned problem by combining the structural and control system design based on simultaneous dynamic optimization approach. The radial basis function model is applied for the planning of the rotation speed considering the relationships of subsystems to minimize the energy consumption per volume. Co-design strategy is implemented to resolve the optimization problem, and numerical results are compared with those of sequential strategy. The dynamic response of the BWR is also analyzed with different optimization strategies to evaluate the advantages of the strategies. Results indicate that co-design strategy not only can reduce the energy consumption of the BWR but also can achieve a smaller vibration amplitude than the sequential strategy. Keywords bucket wheel reclaimer, co-design, energyminimum optimization, sequential strategy
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Introduction
Bucket wheel reclaimer (BWR) is a large complex engineering machine that is widely used in open pit mines because of its many excellent advantages, such as high efficiency, low labor strength, and easy operation. Received August 20, 2019; accepted November 18, 2019
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Yongliang YUAN, Liye LV, Shuo WANG, Xueguan SONG ( ) School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China E-mail: [email protected]
However, the working condition of the BWR has several uncertain factors, such as falling ore and surface irregularity. A large amount of resources is also consumed by the operation of the BWR because of the sub-optimal size of the BWR structure, such as too heavy weight and high power consumption. Therefore, improving the performance and decreasing the energy consumption of BWR are still challenging tasks. Many researchers have focused on improving the performance of the BWR and preventing accidents. For example, the integrity assessment of the bucket wheel tierod is calculated in Ref. [1]. The causes of failure through onsite inspection and metallographic analysis are achieved in Ref. [2]. The cause of crack occurrence and stress strain state is obtained using the finite element method [3]. Although the performance of the BWR can be improved by considering the cutting force, stress strain state, and structural improvement, the optimal control problem is still an important factor that must be considered. To this end, a hybrid c
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