Research on Dynamic Load Identification Method Based on Least Squares Support Vector Machine

Dynamic load identification is the process of calculating dynamic loads through structural vibration responses and characteristics. In aerospace electromechanical design, such as hydraulic systems and fuel systems, dynamic load calculation is crucial as it determines subsequent vibration analysis work. This paper proposes a dynamic load identification model based on the least squares support vector machine, which directly establishes the relationship between dynamic response and dynamic load, thereby achieving high-precision dynamic load identification. The paper derives the regression models for dynamic load identification using standard support vector machines and least squares support vector machines. Additionally, a dynamic load identification model for continuous systems with damping, using a cantilever beam as the research object, is established. The accuracy of the calculation results is validated through the identification of periodic loads and impact loads. Numerical simulation results demonstrate that the proposed method achieves high computational accuracy, strong reliability, and significant engineering application value.