Optimal design of hydraulic excavator working device based on multiple surrogate models

Abstract

The optimal design of hydraulic excavator working device is often characterized by computationally expensive analysis methods such as finite element analysis. Significant difficulties also exist when using a sensitivity-based decomposition approach to such practical engineering problems because explicit mathematical formulas between the objective function and design variables are impossible to formulate. An effective alternative is known as the surrogate model. The purpose of this article is to provide a comparative study on multiple surrogate models, including the response surface methodology, Kriging, radial basis function, and support vector machine, and select the one that best fits the optimization of the working device. In this article, a new modeling strategy based on the combination of the dimension variables between hinge joints and the forces loaded on hinge joints of the working device is proposed. In addition, the extent to which the accuracy of the surrogate models depends on different design variables is presented. The bionic intelligent optimization algorithm is then used to obtain the optimal results, which demonstrate that the maximum stresses calculated by the predicted method and finite element analysis are quite similar, but the efficiency of the former is much higher than that of the latter.

Lightweight and High‐Strength Design of an Excavator Bucket under Uncertain Loading

“…e digging operation using an excavator bucket is a typical and complex soil-bucket interaction process, in which the loads acting on the bucket are uncertain and the stresses in the bucket material are variable due to a constantly changing environment. e traditional deterministic design method takes no account of these uncertainties in loading condition and calculates the design loads under limiting working condition according to the theoretical or empirical load model [1][2][3][4]. us, the highstrength structures are designed at the expense of increased structure weight.…”

“…So far, the related research integrating the uncertain resistive force model into the bucket structure optimization design framework has not been reported. On the aspect of structure design, Qiu et al [2] conducted the optimal design of an excavator's working device including the boom, stick, and bucket based on multiple surrogate models. e work of Qiu et al [2] still belongs to the field of ultimate strength design.…”

“…On the aspect of structure design, Qiu et al [2] conducted the optimal design of an excavator's working device including the boom, stick, and bucket based on multiple surrogate models. e work of Qiu et al [2] still belongs to the field of ultimate strength design. Rusinski et al [3] conducted the research on the investigation and modernization of buckets of surface mining machines and presented an approach to consider the test results in real mining conditions as well as the numerical analysis results of modern numerical tools that support the bucket structure design in the process of bucket structure optimization.…”

Lightweight and high-strength optimization design for a fully parametric working attachment of a hydraulic excavator based on limiting theoretical digging capability model

“…Many research works have been conducted and reported on the structural stress analysis and optimization design for the working attachment of an excavator. 10–15 Maury et al. 10 carried out failure analysis for the weld-cracked boom of a mining excavator.…”

“…To improve computational efficiency, Qiu et al. 15 investigated the applications of multiple surrogate models in optimal design of the working attachment. Rusiński et al.…”