基于频响函数的结构惯性参数识别及应用

Based on the rigid body dynamics principle and mass-line theory of frequency response function (FRF), the basal principle for identifying structure inertia parameters was deduced for accurately and quickly obtaining the parameters of a power-train. Then the test system was set up, and their reliability and the testing error were calibrated by comparing with the theory value and testing value of a rectangle body. Finally, take a motor power-train as an example, all inertia parameters were tested based on experimental modal analysis. The feasibility and reliability of the method was proved. This technique is suitable for obtaining inertia parameters of irregular complicated configurations.